@charset "UTF-8";
/**
 * Main Stylesheet - โรงเรียนอุทัยวิทยาคม (Uthaiwitthayakhom School)
 * Font: Kanit (Requirement 5)
 * Mobile First & Fully Responsive (Requirement 6)
 * Multi-Theme Engine:
 *   1. iPhone Glass (iOS Glassmorphism)
 *   2. Yellow & Red (เหลือง แดง)
 *   3. Slate Gray (สีเทา)
 *   4. Navy & Gold (น้ำเงิน ทอง)
 */

:root {
    --utw-primary: #0a2540;
    --utw-primary-dark: #07192c;
    --utw-secondary: #d97706;
    --utw-secondary-light: #fef3c7;
    --utw-accent: #2563eb;
    --utw-gold: #f59e0b;
    --utw-text-main: #1e293b;
    --utw-text-muted: #64748b;
    --utw-bg-body: #f1f5f9;
    --utw-card-bg: #ffffff;
    --utw-card-border: #e2e8f0;
    --utw-topbar-bg: linear-gradient(135deg, #07192c 0%, #0a2540 100%);
    --utw-navbar-bg: #0a2540;
    --utw-footer-bg: #07192c;
    --utw-footer-bottom: #030d17;
    --font-main: 'Kanit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --shadow-soft: 0 4px 20px -2px rgba(10, 37, 64, 0.08);
    --shadow-hover: 0 12px 30px -4px rgba(10, 37, 64, 0.15);
    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ========================================================
   THEME 1: IPHONE GLASS (iOS Glassmorphism / Frosted Glass)
======================================================== */
[data-theme="iphone_glass"] {
    --utw-primary: #0f172a;
    --utw-primary-dark: #020617;
    --utw-secondary: #0284c7;
    --utw-secondary-light: #e0f2fe;
    --utw-accent: #0ea5e9;
    --utw-gold: #38bdf8;
    --utw-text-main: #0f172a;
    --utw-text-muted: #475569;
    --utw-bg-body: #e2e8f0;
    --utw-card-bg: rgba(255, 255, 255, 0.82);
    --utw-card-border: rgba(255, 255, 255, 0.6);
    --utw-topbar-bg: linear-gradient(135deg, #090d16 0%, #0f172a 100%);
    --utw-navbar-bg: rgba(15, 23, 42, 0.92);
    --utw-footer-bg: #0b1120;
    --utw-footer-bottom: #020617;
    --shadow-soft: 0 8px 32px 0 rgba(31, 38, 135, 0.08);
    --shadow-hover: 0 14px 40px -4px rgba(14, 165, 233, 0.2);
}

[data-theme="iphone_glass"] body {
    background: radial-gradient(circle at 10% 20%, rgba(224, 242, 254, 0.8) 0%, rgba(241, 245, 249, 1) 90%);
    background-attachment: fixed;
}

[data-theme="iphone_glass"] .navbar-utw {
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.15);
}

[data-theme="iphone_glass"] .news-card,
[data-theme="iphone_glass"] .executive-card,
[data-theme="iphone_glass"] .banner-link-card,
[data-theme="iphone_glass"] .social-widget-card,
[data-theme="iphone_glass"] .card {
    background: rgba(255, 255, 255, 0.82) !important;
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 1px solid rgba(255, 255, 255, 0.6) !important;
}

/* ========================================================
   THEME 2: YELLOW & RED (เหลือง แดง)
======================================================== */
[data-theme="yellow_red"] {
    --utw-primary: #881337;
    --utw-primary-dark: #4c0519;
    --utw-secondary: #eab308;
    --utw-secondary-light: #fef9c3;
    --utw-accent: #dc2626;
    --utw-gold: #f59e0b;
    --utw-text-main: #1c1917;
    --utw-text-muted: #78716c;
    --utw-bg-body: #fafaf9;
    --utw-card-bg: #ffffff;
    --utw-card-border: #fecdd3;
    --utw-topbar-bg: linear-gradient(135deg, #4c0519 0%, #881337 100%);
    --utw-navbar-bg: #881337;
    --utw-footer-bg: #4c0519;
    --utw-footer-bottom: #2b020d;
    --shadow-soft: 0 4px 20px -2px rgba(136, 19, 55, 0.08);
    --shadow-hover: 0 12px 30px -4px rgba(220, 38, 38, 0.18);
}

[data-theme="yellow_red"] .section-title::after {
    background: linear-gradient(90deg, #dc2626, #eab308);
}

[data-theme="yellow_red"] .topbar {
    border-bottom: 2px solid #eab308;
}

[data-theme="yellow_red"] .btn-primary {
    background-color: #881337;
    border-color: #881337;
}

[data-theme="yellow_red"] .btn-primary:hover {
    background-color: #9f1239;
    border-color: #9f1239;
}

/* ========================================================
   THEME 3: SLATE GRAY (สีเทามินิมอล)
======================================================== */
[data-theme="slate_gray"] {
    --utw-primary: #1e293b;
    --utw-primary-dark: #0f172a;
    --utw-secondary: #475569;
    --utw-secondary-light: #f1f5f9;
    --utw-accent: #0284c7;
    --utw-gold: #94a3b8;
    --utw-text-main: #0f172a;
    --utw-text-muted: #64748b;
    --utw-bg-body: #f8fafc;
    --utw-card-bg: #ffffff;
    --utw-card-border: #cbd5e1;
    --utw-topbar-bg: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    --utw-navbar-bg: #1e293b;
    --utw-footer-bg: #0f172a;
    --utw-footer-bottom: #020617;
    --shadow-soft: 0 4px 20px -2px rgba(15, 23, 42, 0.06);
    --shadow-hover: 0 12px 30px -4px rgba(15, 23, 42, 0.12);
}

[data-theme="slate_gray"] .topbar {
    border-bottom: 2px solid #94a3b8;
}

[data-theme="slate_gray"] .section-title::after {
    background: linear-gradient(90deg, #475569, #94a3b8);
}

[data-theme="slate_gray"] .btn-warning {
    background-color: #334155;
    border-color: #334155;
    color: #ffffff;
}

[data-theme="slate_gray"] .btn-warning:hover {
    background-color: #0f172a;
    border-color: #0f172a;
    color: #ffffff;
}

/* ========================================================
   THEME 4: NAVY & GOLD (น้ำเงินเข้ม ทอง)
======================================================== */
[data-theme="navy_gold"] {
    --utw-primary: #1a2e5a;
    --utw-primary-dark: #0f1d38;
    --utw-secondary: #c9a84c;
    --utw-secondary-light: #fdf8e6;
    --utw-accent: #2563eb;
    --utw-gold: #c9a84c;
    --utw-text-main: #1e293b;
    --utw-text-muted: #64748b;
    --utw-bg-body: #f8fafc;
    --utw-card-bg: #ffffff;
    --utw-card-border: #e2e8f0;
    --utw-topbar-bg: linear-gradient(135deg, #0f1d38 0%, #1a2e5a 100%);
    --utw-navbar-bg: #1a2e5a;
    --utw-footer-bg: #0f1d38;
    --utw-footer-bottom: #080f1e;
    --shadow-soft: 0 4px 20px -2px rgba(26, 46, 90, 0.08);
    --shadow-hover: 0 12px 30px -4px rgba(201, 168, 76, 0.2);
}
[data-theme="navy_gold"] .section-title::after {
    background: linear-gradient(90deg, #1a2e5a, #c9a84c);
}
[data-theme="navy_gold"] .topbar {
    border-bottom: 2px solid #c9a84c;
}
[data-theme="navy_gold"] .btn-primary {
    background-color: #1a2e5a;
    border-color: #1a2e5a;
}
[data-theme="navy_gold"] .btn-primary:hover {
    background-color: #243c73;
    border-color: #243c73;
}

/* ========================================================
   THEME 5: MIDNIGHT BLUE
   Primary #1E3A8A · Secondary #2563EB · Background #F8FAFC
======================================================== */
[data-theme="midnight_blue"] {
    --utw-primary: #1e3a8a;
    --utw-primary-dark: #172554;
    --utw-secondary: #2563eb;
    --utw-secondary-light: #dbeafe;
    --utw-accent: #3b82f6;
    --utw-gold: #60a5fa;
    --utw-text-main: #0f172a;
    --utw-text-muted: #64748b;
    --utw-bg-body: #f8fafc;
    --utw-card-bg: #ffffff;
    --utw-card-border: #cbd5e1;
    --utw-topbar-bg: linear-gradient(135deg, #172554 0%, #1e3a8a 100%);
    --utw-navbar-bg: #1e3a8a;
    --utw-footer-bg: #172554;
    --utw-footer-bottom: #0f172a;
    --shadow-soft: 0 4px 20px -2px rgba(30, 58, 138, 0.08);
    --shadow-hover: 0 12px 30px -4px rgba(37, 99, 235, 0.2);
}
[data-theme="midnight_blue"] .section-title::after {
    background: linear-gradient(90deg, #1e3a8a, #2563eb);
}
[data-theme="midnight_blue"] .topbar {
    border-bottom: 2px solid #2563eb;
}
[data-theme="midnight_blue"] .btn-primary {
    background-color: #1e3a8a;
    border-color: #1e3a8a;
}
[data-theme="midnight_blue"] .btn-primary:hover {
    background-color: #2563eb;
    border-color: #2563eb;
}

/* ========================================================
   THEME 6: OCEAN BREEZE
   Primary #164E63 · Secondary #0891B2 · Background #ECFEFF
======================================================== */
[data-theme="ocean_breeze"] {
    --utw-primary: #164e63;
    --utw-primary-dark: #083344;
    --utw-secondary: #0891b2;
    --utw-secondary-light: #cffafe;
    --utw-accent: #06b6d4;
    --utw-gold: #22d3ee;
    --utw-text-main: #082f49;
    --utw-text-muted: #475569;
    --utw-bg-body: #ecfeff;
    --utw-card-bg: #ffffff;
    --utw-card-border: #a5f3fc;
    --utw-topbar-bg: linear-gradient(135deg, #083344 0%, #164e63 100%);
    --utw-navbar-bg: #164e63;
    --utw-footer-bg: #083344;
    --utw-footer-bottom: #041c26;
    --shadow-soft: 0 4px 20px -2px rgba(22, 78, 99, 0.08);
    --shadow-hover: 0 12px 30px -4px rgba(8, 145, 178, 0.2);
}
[data-theme="ocean_breeze"] .section-title::after {
    background: linear-gradient(90deg, #164e63, #0891b2);
}
[data-theme="ocean_breeze"] .topbar {
    border-bottom: 2px solid #0891b2;
}
[data-theme="ocean_breeze"] .btn-primary {
    background-color: #164e63;
    border-color: #164e63;
}
[data-theme="ocean_breeze"] .btn-primary:hover {
    background-color: #0891b2;
    border-color: #0891b2;
}

/* ========================================================
   THEME 7: EMERALD GREEN
   Primary #064E3B · Secondary #10B981 · Background #ECFDF5
======================================================== */
[data-theme="emerald_green"] {
    --utw-primary: #064e3b;
    --utw-primary-dark: #022c22;
    --utw-secondary: #10b981;
    --utw-secondary-light: #d1fae5;
    --utw-accent: #059669;
    --utw-gold: #34d399;
    --utw-text-main: #064e3b;
    --utw-text-muted: #475569;
    --utw-bg-body: #ecfdf5;
    --utw-card-bg: #ffffff;
    --utw-card-border: #a7f3d0;
    --utw-topbar-bg: linear-gradient(135deg, #022c22 0%, #064e3b 100%);
    --utw-navbar-bg: #064e3b;
    --utw-footer-bg: #022c22;
    --utw-footer-bottom: #011a14;
    --shadow-soft: 0 4px 20px -2px rgba(6, 78, 59, 0.08);
    --shadow-hover: 0 12px 30px -4px rgba(16, 185, 129, 0.2);
}
[data-theme="emerald_green"] .section-title::after {
    background: linear-gradient(90deg, #064e3b, #10b981);
}
[data-theme="emerald_green"] .topbar {
    border-bottom: 2px solid #10b981;
}
[data-theme="emerald_green"] .btn-primary {
    background-color: #064e3b;
    border-color: #064e3b;
}
[data-theme="emerald_green"] .btn-primary:hover {
    background-color: #059669;
    border-color: #059669;
}

/* ========================================================
   THEME 8: ROYAL PURPLE
   Primary #2E1065 · Secondary #8B5CF6 · Background #F5F3FF
======================================================== */
[data-theme="royal_purple"] {
    --utw-primary: #2e1065;
    --utw-primary-dark: #1e0944;
    --utw-secondary: #8b5cf6;
    --utw-secondary-light: #ede9fe;
    --utw-accent: #7c3aed;
    --utw-gold: #c4b5fd;
    --utw-text-main: #1e1b4b;
    --utw-text-muted: #64748b;
    --utw-bg-body: #f5f3ff;
    --utw-card-bg: #ffffff;
    --utw-card-border: #ddd6fe;
    --utw-topbar-bg: linear-gradient(135deg, #1e0944 0%, #2e1065 100%);
    --utw-navbar-bg: #2e1065;
    --utw-footer-bg: #1e0944;
    --utw-footer-bottom: #100526;
    --shadow-soft: 0 4px 20px -2px rgba(46, 16, 101, 0.08);
    --shadow-hover: 0 12px 30px -4px rgba(139, 92, 246, 0.2);
}
[data-theme="royal_purple"] .section-title::after {
    background: linear-gradient(90deg, #2e1065, #8b5cf6);
}
[data-theme="royal_purple"] .topbar {
    border-bottom: 2px solid #8b5cf6;
}
[data-theme="royal_purple"] .btn-primary {
    background-color: #2e1065;
    border-color: #2e1065;
}
[data-theme="royal_purple"] .btn-primary:hover {
    background-color: #7c3aed;
    border-color: #7c3aed;
}

/* ========================================================
   THEME 9: SUNSET ORANGE
   Primary #7C2D12 · Secondary #F97316 · Background #FFF7ED
======================================================== */
[data-theme="sunset_orange"] {
    --utw-primary: #7c2d12;
    --utw-primary-dark: #431407;
    --utw-secondary: #f97316;
    --utw-secondary-light: #ffedd5;
    --utw-accent: #ea580c;
    --utw-gold: #fb923c;
    --utw-text-main: #292524;
    --utw-text-muted: #78716c;
    --utw-bg-body: #fff7ed;
    --utw-card-bg: #ffffff;
    --utw-card-border: #fed7aa;
    --utw-topbar-bg: linear-gradient(135deg, #431407 0%, #7c2d12 100%);
    --utw-navbar-bg: #7c2d12;
    --utw-footer-bg: #431407;
    --utw-footer-bottom: #240a03;
    --shadow-soft: 0 4px 20px -2px rgba(124, 45, 18, 0.08);
    --shadow-hover: 0 12px 30px -4px rgba(249, 115, 22, 0.2);
}
[data-theme="sunset_orange"] .section-title::after {
    background: linear-gradient(90deg, #7c2d12, #f97316);
}
[data-theme="sunset_orange"] .topbar {
    border-bottom: 2px solid #f97316;
}
[data-theme="sunset_orange"] .btn-primary {
    background-color: #7c2d12;
    border-color: #7c2d12;
}
[data-theme="sunset_orange"] .btn-primary:hover {
    background-color: #ea580c;
    border-color: #ea580c;
}

/* ========================================================
   THEME 10: MINIMAL WHITE
   Primary #111827 · Secondary #374151 · Background #FFFFFF
======================================================== */
[data-theme="minimal_white"] {
    --utw-primary: #111827;
    --utw-primary-dark: #030712;
    --utw-secondary: #374151;
    --utw-secondary-light: #f3f4f6;
    --utw-accent: #4b5563;
    --utw-gold: #9ca3af;
    --utw-text-main: #111827;
    --utw-text-muted: #6b7280;
    --utw-bg-body: #ffffff;
    --utw-card-bg: #ffffff;
    --utw-card-border: #e5e7eb;
    --utw-topbar-bg: linear-gradient(135deg, #030712 0%, #111827 100%);
    --utw-navbar-bg: #111827;
    --utw-footer-bg: #030712;
    --utw-footer-bottom: #000000;
    --shadow-soft: 0 2px 15px rgba(0, 0, 0, 0.05);
    --shadow-hover: 0 8px 25px rgba(0, 0, 0, 0.1);
}
[data-theme="minimal_white"] .section-title::after {
    background: linear-gradient(90deg, #111827, #6b7280);
}
[data-theme="minimal_white"] .topbar {
    border-bottom: 2px solid #374151;
}
[data-theme="minimal_white"] .btn-primary {
    background-color: #111827;
    border-color: #111827;
}
[data-theme="minimal_white"] .btn-primary:hover {
    background-color: #374151;
    border-color: #374151;
}

/* ========================================================
   THEME 11: CYBER NEON
   Primary #09090B · Secondary #7C3AED · Accent #22D3EE
======================================================== */
[data-theme="cyber_neon"] {
    --utw-primary: #09090b;
    --utw-primary-dark: #000000;
    --utw-secondary: #7c3aed;
    --utw-secondary-light: rgba(124, 58, 237, 0.15);
    --utw-accent: #22d3ee;
    --utw-gold: #22d3ee;
    --utw-text-main: #f4f4f5;
    --utw-text-muted: #a1a1aa;
    --utw-bg-body: #09090b;
    --utw-card-bg: #18181b;
    --utw-card-border: #27272a;
    --utw-topbar-bg: #030304;
    --utw-navbar-bg: #09090b;
    --utw-footer-bg: #030304;
    --utw-footer-bottom: #000000;
    --shadow-soft: 0 4px 20px rgba(124, 58, 237, 0.2);
    --shadow-hover: 0 8px 30px rgba(34, 211, 238, 0.3);
}
[data-theme="cyber_neon"] body {
    background-color: #09090b;
    color: #f4f4f5;
}
[data-theme="cyber_neon"] .main-header {
    background-color: #121215 !important;
    border-bottom: 1px solid #27272a;
}
[data-theme="cyber_neon"] .brand-text-th {
    color: #22d3ee !important;
    text-shadow: 0 0 12px rgba(34, 211, 238, 0.4);
}
[data-theme="cyber_neon"] .navbar-utw {
    border-bottom: 2px solid #7c3aed;
    box-shadow: 0 4px 20px rgba(124, 58, 237, 0.25);
}
[data-theme="cyber_neon"] .card,
[data-theme="cyber_neon"] .news-card,
[data-theme="cyber_neon"] .executive-card,
[data-theme="cyber_neon"] .banner-link-card,
[data-theme="cyber_neon"] .executives-section,
[data-theme="cyber_neon"] .news-section {
    background-color: #121215 !important;
    color: #f4f4f5 !important;
    border-color: #27272a !important;
}
[data-theme="cyber_neon"] .text-dark {
    color: #f4f4f5 !important;
}
[data-theme="cyber_neon"] .news-card-title a {
    color: #22d3ee !important;
}
[data-theme="cyber_neon"] .section-title {
    color: #22d3ee;
}
[data-theme="cyber_neon"] .section-title::after {
    background: linear-gradient(90deg, #7c3aed, #22d3ee);
    box-shadow: 0 0 8px #22d3ee;
}
[data-theme="cyber_neon"] .topbar {
    border-bottom: 2px solid #22d3ee;
}
[data-theme="cyber_neon"] .btn-primary {
    background-color: #7c3aed;
    border-color: #7c3aed;
    box-shadow: 0 0 15px rgba(124, 58, 237, 0.4);
}
[data-theme="cyber_neon"] .btn-primary:hover {
    background-color: #22d3ee;
    border-color: #22d3ee;
    color: #000;
}

/* ========================================================
   THEME 12: ROSE GOLD
   Primary #881337 · Secondary #BE185D · Background #FFF1F2
======================================================== */
[data-theme="rose_gold"] {
    --utw-primary: #881337;
    --utw-primary-dark: #4c0519;
    --utw-secondary: #be185d;
    --utw-secondary-light: #fce7f3;
    --utw-accent: #e11d48;
    --utw-gold: #f43f5e;
    --utw-text-main: #4c0519;
    --utw-text-muted: #701a31;
    --utw-bg-body: #fff1f2;
    --utw-card-bg: #ffffff;
    --utw-card-border: #fbcfe8;
    --utw-topbar-bg: linear-gradient(135deg, #4c0519 0%, #881337 100%);
    --utw-navbar-bg: #881337;
    --utw-footer-bg: #4c0519;
    --utw-footer-bottom: #2b020d;
    --shadow-soft: 0 4px 20px -2px rgba(136, 19, 55, 0.08);
    --shadow-hover: 0 12px 30px -4px rgba(190, 24, 93, 0.2);
}
[data-theme="rose_gold"] .section-title::after {
    background: linear-gradient(90deg, #881337, #be185d);
}
[data-theme="rose_gold"] .topbar {
    border-bottom: 2px solid #be185d;
}
[data-theme="rose_gold"] .btn-primary {
    background-color: #881337;
    border-color: #881337;
}
[data-theme="rose_gold"] .btn-primary:hover {
    background-color: #be185d;
    border-color: #be185d;
}

/* ========================================================
   THEME 13: EARTH TONE
   Primary #44403C · Secondary #78716C · Background #FAFAF9
======================================================== */
[data-theme="earth_tone"] {
    --utw-primary: #44403c;
    --utw-primary-dark: #1c1917;
    --utw-secondary: #78716c;
    --utw-secondary-light: #f5f5f4;
    --utw-accent: #57534e;
    --utw-gold: #a8a29e;
    --utw-text-main: #1c1917;
    --utw-text-muted: #78716c;
    --utw-bg-body: #fafaf9;
    --utw-card-bg: #ffffff;
    --utw-card-border: #e7e5e4;
    --utw-topbar-bg: linear-gradient(135deg, #1c1917 0%, #44403c 100%);
    --utw-navbar-bg: #44403c;
    --utw-footer-bg: #1c1917;
    --utw-footer-bottom: #0c0a09;
    --shadow-soft: 0 4px 20px -2px rgba(68, 64, 60, 0.08);
    --shadow-hover: 0 12px 30px -4px rgba(120, 113, 108, 0.2);
}
[data-theme="earth_tone"] .section-title::after {
    background: linear-gradient(90deg, #44403c, #78716c);
}
[data-theme="earth_tone"] .topbar {
    border-bottom: 2px solid #78716c;
}
[data-theme="earth_tone"] .btn-primary {
    background-color: #44403c;
    border-color: #44403c;
}
[data-theme="earth_tone"] .btn-primary:hover {
    background-color: #57534e;
    border-color: #57534e;
}

/* ========================================================
   THEME 14: ROYAL GOLD
   Primary #172554 · Secondary #D4AF37 · Background #FFFBEB
======================================================== */
[data-theme="royal_gold"] {
    --utw-primary: #172554;
    --utw-primary-dark: #0f172a;
    --utw-secondary: #d4af37;
    --utw-secondary-light: #fef3c7;
    --utw-accent: #1e3a8a;
    --utw-gold: #f59e0b;
    --utw-text-main: #0f172a;
    --utw-text-muted: #64748b;
    --utw-bg-body: #fffbeb;
    --utw-card-bg: #ffffff;
    --utw-card-border: #fde68a;
    --utw-topbar-bg: linear-gradient(135deg, #0f172a 0%, #172554 100%);
    --utw-navbar-bg: #172554;
    --utw-footer-bg: #0f172a;
    --utw-footer-bottom: #020617;
    --shadow-soft: 0 4px 20px -2px rgba(23, 37, 84, 0.08);
    --shadow-hover: 0 12px 30px -4px rgba(212, 175, 55, 0.25);
}
[data-theme="royal_gold"] .section-title::after {
    background: linear-gradient(90deg, #172554, #d4af37);
}
[data-theme="royal_gold"] .topbar {
    border-bottom: 2px solid #d4af37;
}
[data-theme="royal_gold"] .btn-primary {
    background-color: #172554;
    border-color: #172554;
}
[data-theme="royal_gold"] .btn-primary:hover {
    background-color: #1e3a8a;
    border-color: #1e3a8a;
}

/* ========================================================
   THEME 15: MEMORIAL BLACK (ขาว-ดำ ไว้อาลัย สมเกียรติ)
   Primary #000000 · Secondary #171717 · Header #262626
======================================================== */
[data-theme="memorial_black"] {
    --utw-primary: #000000;
    --utw-primary-dark: #000000;
    --utw-secondary: #525252;
    --utw-secondary-light: #262626;
    --utw-accent: #d4d4d4;
    --utw-gold: #a3a3a3;
    --utw-text-main: #f5f5f5;
    --utw-text-muted: #a3a3a3;
    --utw-bg-body: #000000;
    --utw-card-bg: #171717;
    --utw-card-border: #525252;
    --utw-topbar-bg: #0a0a0a;
    --utw-navbar-bg: #171717;
    --utw-footer-bg: #0a0a0a;
    --utw-footer-bottom: #000000;
    --shadow-soft: 0 4px 20px rgba(0, 0, 0, 0.6);
    --shadow-hover: 0 8px 30px rgba(82, 82, 82, 0.4);
}
[data-theme="memorial_black"] body {
    background-color: #000000;
    color: #f5f5f5;
}
[data-theme="memorial_black"] .main-header {
    background-color: #171717 !important;
    border-bottom: 1px solid #525252;
}
[data-theme="memorial_black"] .brand-text-th {
    color: #ffffff !important;
}
[data-theme="memorial_black"] .brand-text-en {
    color: #a3a3a3 !important;
}
[data-theme="memorial_black"] .navbar-utw {
    background: #262626 !important;
    border-bottom: 2px solid #525252;
}
[data-theme="memorial_black"] .card,
[data-theme="memorial_black"] .news-card,
[data-theme="memorial_black"] .executive-card,
[data-theme="memorial_black"] .banner-link-card,
[data-theme="memorial_black"] .executives-section,
[data-theme="memorial_black"] .news-section {
    background-color: #171717 !important;
    color: #f5f5f5 !important;
    border-color: #525252 !important;
}
[data-theme="memorial_black"] .text-dark {
    color: #f5f5f5 !important;
}
[data-theme="memorial_black"] .section-title {
    color: #ffffff;
}
[data-theme="memorial_black"] .section-title::after {
    background: linear-gradient(90deg, #525252, #a3a3a3);
}
[data-theme="memorial_black"] .topbar {
    border-bottom: 2px solid #525252;
}
[data-theme="memorial_black"] .btn-primary {
    background-color: #262626;
    border-color: #525252;
    color: #f5f5f5;
}
[data-theme="memorial_black"] .btn-primary:hover {
    background-color: #404040;
    border-color: #737373;
}

/* ========================================================
   THEME 16: SUNRISE ENERGY
   Primary #B91C1C · Secondary #FACC15 · Background #FFFBEB
======================================================== */
[data-theme="sunrise_energy"] {
    --utw-primary: #b91c1c;
    --utw-primary-dark: #7f1d1d;
    --utw-secondary: #facc15;
    --utw-secondary-light: #fef9c3;
    --utw-accent: #dc2626;
    --utw-gold: #eab308;
    --utw-text-main: #1f2937;
    --utw-text-muted: #6b7280;
    --utw-bg-body: #fffbeb;
    --utw-card-bg: #ffffff;
    --utw-card-border: #fde68a;
    --utw-topbar-bg: linear-gradient(135deg, #7f1d1d 0%, #b91c1c 100%);
    --utw-navbar-bg: #b91c1c;
    --utw-footer-bg: #7f1d1d;
    --utw-footer-bottom: #450a0a;
    --shadow-soft: 0 4px 20px -2px rgba(185, 28, 28, 0.08);
    --shadow-hover: 0 12px 30px -4px rgba(250, 204, 21, 0.3);
}
[data-theme="sunrise_energy"] .section-title::after {
    background: linear-gradient(90deg, #b91c1c, #facc15);
}
[data-theme="sunrise_energy"] .topbar {
    border-bottom: 2px solid #facc15;
}
[data-theme="sunrise_energy"] .btn-primary {
    background-color: #b91c1c;
    border-color: #b91c1c;
}
[data-theme="sunrise_energy"] .btn-primary:hover {
    background-color: #dc2626;
    border-color: #dc2626;
}

/* ========================================================
   THEME 17: ROYAL FLAME
   Primary #7F1D1D · Secondary #D4AF37 · Background #FFFAE5
======================================================== */
[data-theme="royal_flame"] {
    --utw-primary: #7f1d1d;
    --utw-primary-dark: #450a0a;
    --utw-secondary: #d4af37;
    --utw-secondary-light: #fef3c7;
    --utw-accent: #991b1b;
    --utw-gold: #eab308;
    --utw-text-main: #1c1917;
    --utw-text-muted: #78716c;
    --utw-bg-body: #fffae5;
    --utw-card-bg: #ffffff;
    --utw-card-border: #fde68a;
    --utw-topbar-bg: linear-gradient(135deg, #450a0a 0%, #7f1d1d 100%);
    --utw-navbar-bg: #7f1d1d;
    --utw-footer-bg: #450a0a;
    --utw-footer-bottom: #240505;
    --shadow-soft: 0 4px 20px -2px rgba(127, 29, 29, 0.08);
    --shadow-hover: 0 12px 30px -4px rgba(212, 175, 55, 0.25);
}
[data-theme="royal_flame"] .section-title::after {
    background: linear-gradient(90deg, #7f1d1d, #d4af37);
}
[data-theme="royal_flame"] .topbar {
    border-bottom: 2px solid #d4af37;
}
[data-theme="royal_flame"] .btn-primary {
    background-color: #7f1d1d;
    border-color: #7f1d1d;
}
[data-theme="royal_flame"] .btn-primary:hover {
    background-color: #991b1b;
    border-color: #991b1b;
}

/* ========================================================
   THEME 18: MODERN POP
   Primary #DC2626 · Secondary #FDE047 · Background #FFFFFF
======================================================== */
[data-theme="modern_pop"] {
    --utw-primary: #dc2626;
    --utw-primary-dark: #991b1b;
    --utw-secondary: #fde047;
    --utw-secondary-light: #fef08a;
    --utw-accent: #ef4444;
    --utw-gold: #facc15;
    --utw-text-main: #111827;
    --utw-text-muted: #6b7280;
    --utw-bg-body: #ffffff;
    --utw-card-bg: #ffffff;
    --utw-card-border: #fecaca;
    --utw-topbar-bg: linear-gradient(135deg, #991b1b 0%, #dc2626 100%);
    --utw-navbar-bg: #dc2626;
    --utw-footer-bg: #991b1b;
    --utw-footer-bottom: #7f1d1d;
    --shadow-soft: 0 4px 20px -2px rgba(220, 38, 38, 0.08);
    --shadow-hover: 0 12px 30px -4px rgba(220, 38, 38, 0.18);
}
[data-theme="modern_pop"] .section-title::after {
    background: linear-gradient(90deg, #dc2626, #fde047);
}
[data-theme="modern_pop"] .topbar {
    border-bottom: 2px solid #fde047;
}
[data-theme="modern_pop"] .btn-primary {
    background-color: #dc2626;
    border-color: #dc2626;
}
[data-theme="modern_pop"] .btn-primary:hover {
    background-color: #b91c1c;
    border-color: #b91c1c;
}

/* ========================================================
   THEME 19: WARM SUNSET
   Primary #9A3412 · Secondary #F97316 · Accent #FBBF24 · Background #FFF7ED
======================================================== */
[data-theme="warm_sunset"] {
    --utw-primary: #9a3412;
    --utw-primary-dark: #7c2d12;
    --utw-secondary: #f97316;
    --utw-secondary-light: #ffedd5;
    --utw-accent: #fbbf24;
    --utw-gold: #f59e0b;
    --utw-text-main: #292524;
    --utw-text-muted: #78716c;
    --utw-bg-body: #fff7ed;
    --utw-card-bg: #ffffff;
    --utw-card-border: #fed7aa;
    --utw-topbar-bg: linear-gradient(135deg, #7c2d12 0%, #9a3412 100%);
    --utw-navbar-bg: #9a3412;
    --utw-footer-bg: #7c2d12;
    --utw-footer-bottom: #431407;
    --shadow-soft: 0 4px 20px -2px rgba(154, 52, 18, 0.08);
    --shadow-hover: 0 12px 30px -4px rgba(249, 115, 22, 0.2);
}
[data-theme="warm_sunset"] .section-title::after {
    background: linear-gradient(90deg, #9a3412, #f97316, #fbbf24);
}
[data-theme="warm_sunset"] .topbar {
    border-bottom: 2px solid #fbbf24;
}
[data-theme="warm_sunset"] .btn-primary {
    background-color: #9a3412;
    border-color: #9a3412;
}
[data-theme="warm_sunset"] .btn-primary:hover {
    background-color: #c2410c;
    border-color: #c2410c;
}

/* ========================================================
   THEME 20: CRIMSON GOLD
   Primary #450A0A · Secondary #B91C1C · Accent #EAB308 · Background #FEFCE8
======================================================== */
[data-theme="crimson_gold"] {
    --utw-primary: #450a0a;
    --utw-primary-dark: #240505;
    --utw-secondary: #b91c1c;
    --utw-secondary-light: #fee2e2;
    --utw-accent: #eab308;
    --utw-gold: #facc15;
    --utw-text-main: #1c1917;
    --utw-text-muted: #78716c;
    --utw-bg-body: #fefce8;
    --utw-card-bg: #ffffff;
    --utw-card-border: #fef08a;
    --utw-topbar-bg: linear-gradient(135deg, #240505 0%, #450a0a 100%);
    --utw-navbar-bg: #450a0a;
    --utw-footer-bg: #240505;
    --utw-footer-bottom: #120202;
    --shadow-soft: 0 4px 20px -2px rgba(69, 10, 10, 0.08);
    --shadow-hover: 0 12px 30px -4px rgba(185, 28, 28, 0.2);
}
[data-theme="crimson_gold"] .section-title::after {
    background: linear-gradient(90deg, #450a0a, #b91c1c, #eab308);
}
[data-theme="crimson_gold"] .topbar {
    border-bottom: 2px solid #eab308;
}
[data-theme="crimson_gold"] .btn-primary {
    background-color: #450a0a;
    border-color: #450a0a;
}
[data-theme="crimson_gold"] .btn-primary:hover {
    background-color: #b91c1c;
    border-color: #b91c1c;
}

/* ========================================================
   THEME 21: CHRISTMAS WONDERLAND
   Primary #14532D · Secondary #DC2626 · Accent #FACC15 · Background #FFFBEB
======================================================== */
[data-theme="christmas_wonderland"] {
    --utw-primary: #14532d;
    --utw-primary-dark: #052e16;
    --utw-secondary: #dc2626;
    --utw-secondary-light: #fee2e2;
    --utw-accent: #facc15;
    --utw-gold: #facc15;
    --utw-text-main: #1f2937;
    --utw-text-muted: #4b5563;
    --utw-bg-body: #fffbeb;
    --utw-card-bg: #ffffff;
    --utw-card-border: #bbf7d0;
    --utw-topbar-bg: linear-gradient(135deg, #052e16 0%, #14532d 100%);
    --utw-navbar-bg: #166534;
    --utw-footer-bg: #052e16;
    --utw-footer-bottom: #021a0c;
    --shadow-soft: 0 4px 20px -2px rgba(20, 83, 45, 0.08);
    --shadow-hover: 0 12px 30px -4px rgba(220, 38, 38, 0.2);
}
[data-theme="christmas_wonderland"] .section-title::after {
    background: linear-gradient(90deg, #14532d, #dc2626, #facc15);
}
[data-theme="christmas_wonderland"] .topbar {
    border-bottom: 2px solid #dc2626;
}
[data-theme="christmas_wonderland"] .btn-primary {
    background-color: #166534;
    border-color: #166534;
}
[data-theme="christmas_wonderland"] .btn-primary:hover {
    background-color: #14532d;
    border-color: #14532d;
}

/* ========================================================
   THEME 22: VALENTINE LOVE
   Primary #BE123C · Secondary #FB7185 · Accent #E11D48 · Background #FFF1F2
======================================================== */
[data-theme="valentine_love"] {
    --utw-primary: #be123c;
    --utw-primary-dark: #881337;
    --utw-secondary: #fb7185;
    --utw-secondary-light: #ffe4e6;
    --utw-accent: #e11d48;
    --utw-gold: #fb7185;
    --utw-text-main: #4c0519;
    --utw-text-muted: #881337;
    --utw-bg-body: #fff1f2;
    --utw-card-bg: #ffffff;
    --utw-card-border: #fecdd3;
    --utw-topbar-bg: linear-gradient(135deg, #881337 0%, #be123c 100%);
    --utw-navbar-bg: #881337;
    --utw-footer-bg: #4c0519;
    --utw-footer-bottom: #2b020d;
    --shadow-soft: 0 4px 20px -2px rgba(190, 18, 60, 0.08);
    --shadow-hover: 0 12px 30px -4px rgba(251, 113, 133, 0.25);
}
[data-theme="valentine_love"] .section-title::after {
    background: linear-gradient(90deg, #be123c, #fb7185);
}
[data-theme="valentine_love"] .topbar {
    border-bottom: 2px solid #fb7185;
}
[data-theme="valentine_love"] .btn-primary {
    background-color: #be123c;
    border-color: #be123c;
}
[data-theme="valentine_love"] .btn-primary:hover {
    background-color: #9f1239;
    border-color: #9f1239;
}

/* ========================================================
   BASE TYPOGRAPHY & ELEMENTS
======================================================== */
body {
    font-family: var(--font-main);
    color: var(--utw-text-main);
    background-color: var(--utw-bg-body);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6, 
.nav-link, .btn, .font-heading, 
.badge, .form-control, .form-select {
    font-family: var(--font-main);
    font-weight: 500;
}

a {
    color: var(--utw-accent);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--utw-secondary);
}

/* ===============================
   TOPBAR
================================= */
.topbar {
    background: var(--utw-topbar-bg);
    color: #e2e8f0;
    font-size: 0.85rem;
    padding: 0.35rem 0;
    border-bottom: 2px solid var(--utw-secondary);
}

.topbar a {
    color: #cbd5e1;
    transition: var(--transition);
}

.topbar a:hover {
    color: var(--utw-gold);
}

.topbar-badge {
    background: rgba(245, 158, 11, 0.2);
    color: #fef08a;
    border: 1px solid rgba(245, 158, 11, 0.4);
    padding: 2px 10px;
    border-radius: 20px;
    font-size: 0.78rem;
}

/* ===============================
   MAIN HEADER & LOGO BRANDING
================================= */
.main-header {
    background: #ffffff;
    padding: 0.85rem 0;
    box-shadow: 0 2px 15px rgba(0,0,0,0.05);
}

.school-brand {
    display: flex;
    align-items: center;
    gap: 1rem;
    text-decoration: none;
    max-width: 100%;
}

.school-logo {
    width: 68px;
    height: 68px;
    object-fit: contain;
    filter: drop-shadow(0 3px 6px rgba(0,0,0,0.12));
    transition: var(--transition);
    flex-shrink: 0;
}

.school-brand:hover .school-logo {
    transform: rotate(4deg) scale(1.05);
}

.brand-text-container {
    min-width: 0;
}

.brand-text-th {
    font-size: 1.55rem;
    font-weight: 700;
    color: var(--utw-primary);
    line-height: 1.2;
    margin-bottom: 2px;
}

.brand-text-en {
    font-size: 0.85rem;
    letter-spacing: 0.8px;
    color: var(--utw-secondary);
    font-weight: 600;
    text-transform: uppercase;
}

.brand-motto {
    font-size: 0.8rem;
    color: var(--utw-text-muted);
}

@media (max-width: 576px) {
    .school-logo {
        width: 52px;
        height: 52px;
    }
    .brand-text-th {
        font-size: 1.25rem;
    }
    .brand-text-en {
        font-size: 0.75rem;
        letter-spacing: 0.4px;
    }
}

/* ===============================
   NAVIGATION BAR
================================= */
.navbar-utw {
    background: var(--utw-navbar-bg);
    box-shadow: 0 4px 15px rgba(0,0,0,0.12);
    padding: 0.2rem 0;
    position: sticky;
    top: 0;
    z-index: 1020;
}

.navbar-utw .navbar-nav .nav-link {
    color: #f8fafc;
    font-size: 0.94rem;
    padding: 0.85rem 1rem;
    transition: var(--transition);
    position: relative;
    display: flex;
    align-items: center;
    gap: 8px;
}

.navbar-utw .navbar-nav .nav-link:hover,
.navbar-utw .navbar-nav .nav-link:focus,
.navbar-utw .navbar-nav .nav-link.active {
    color: #fef08a;
    background: rgba(255,255,255,0.08);
}

@media (min-width: 992px) {
    .navbar-utw .navbar-nav .nav-link::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 50%;
        width: 0;
        height: 3px;
        background-color: var(--utw-gold);
        transition: var(--transition);
        transform: translateX(-50%);
    }

    .navbar-utw .navbar-nav .nav-link:hover::after,
    .navbar-utw .navbar-nav .nav-link.active::after {
        width: 80%;
    }

    .navbar-utw .dropdown:hover > .dropdown-menu {
        display: block;
    }
}

@media (max-width: 991px) {
    .navbar-utw .navbar-collapse {
        max-height: 80vh;
        overflow-y: auto;
        padding: 0.75rem 0;
    }
    .navbar-utw .navbar-nav .nav-link {
        padding: 0.65rem 1rem;
        border-radius: 8px;
        margin-bottom: 2px;
    }
    .navbar-utw .dropdown-menu {
        background-color: rgba(7, 25, 44, 0.95);
        border: 1px solid rgba(255,255,255,0.1);
        margin: 0.25rem 0.5rem 0.5rem 0.5rem;
        border-radius: 8px;
        padding: 0.5rem 0;
    }
    .navbar-utw .dropdown-item {
        color: #e2e8f0;
        padding: 0.6rem 1.25rem;
    }
    .navbar-utw .dropdown-item:hover,
    .navbar-utw .dropdown-item.active {
        background: rgba(245, 158, 11, 0.2);
        color: #fef08a;
    }
}

.navbar-utw .dropdown-menu {
    border: none;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.18);
    padding: 0.5rem 0;
    min-width: 250px;
    margin-top: 0;
    border-top: 3px solid var(--utw-secondary);
}

.navbar-utw .dropdown-item {
    font-size: 0.92rem;
    padding: 0.65rem 1.25rem;
    color: #334155;
    transition: var(--transition);
}

.navbar-utw .dropdown-item:hover {
    background-color: #eff6ff;
    color: var(--utw-primary);
    padding-left: 1.5rem;
}

.navbar-utw .dropdown-header {
    font-weight: 700;
    color: var(--utw-primary);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 0.5rem 1.25rem;
    background: #f8fafc;
}

/* ===============================
   HERO CAROUSEL SLIDER
================================= */
.hero-slider {
    position: relative;
    overflow: hidden;
    background: #07192c;
    border-bottom: 4px solid var(--utw-secondary);
}

.hero-slider .carousel-item {
    height: 480px;
    background: #000;
}

.hero-slider .carousel-item img {
    height: 100%;
    width: 100%;
    object-fit: cover;
    filter: brightness(0.88);
}

.hero-slider .carousel-caption {
    background: linear-gradient(90deg, rgba(7,25,44,0.95) 0%, rgba(10,37,64,0.85) 60%, rgba(10,37,64,0.2) 100%);
    left: 0;
    right: auto;
    bottom: 0;
    top: 0;
    text-align: left;
    padding: 3.5rem 3rem;
    max-width: 680px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.hero-slider .carousel-caption h2 {
    font-size: 2.2rem;
    color: #ffffff;
    font-weight: 700;
    text-shadow: 0 2px 8px rgba(0,0,0,0.5);
    line-height: 1.25;
}

.hero-slider .carousel-caption p {
    font-size: 1.1rem;
    color: #e2e8f0;
    margin: 0.75rem 0 1.25rem 0;
    text-shadow: 0 1px 4px rgba(0,0,0,0.6);
}

@media (max-width: 991px) {
    .hero-slider .carousel-item {
        height: 380px;
    }
    .hero-slider .carousel-caption {
        padding: 2rem;
        max-width: 550px;
    }
    .hero-slider .carousel-caption h2 {
        font-size: 1.7rem;
    }
}

@media (max-width: 767px) {
    .hero-slider .carousel-item {
        height: 300px;
    }
    .hero-slider .carousel-caption {
        padding: 1.5rem 1.25rem;
        max-width: 100%;
        background: linear-gradient(0deg, rgba(7,25,44,0.92) 0%, rgba(7,25,44,0.65) 100%);
        justify-content: flex-end;
    }
    .hero-slider .carousel-caption h2 {
        font-size: 1.25rem;
        line-height: 1.3;
    }
    .hero-slider .carousel-caption p {
        font-size: 0.88rem;
        margin: 0.4rem 0 0.8rem 0;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
}

.carousel-indicators [data-bs-target] {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    margin: 0 5px;
    background-color: var(--utw-gold);
    opacity: 0.5;
}

.carousel-indicators .active {
    opacity: 1;
    width: 24px;
    border-radius: 8px;
}

/* ===============================
   SECTION HEADINGS
================================= */
.section-title-wrap {
    position: relative;
    margin-bottom: 2.25rem;
    text-align: center;
}

.section-title {
    font-size: 1.85rem;
    color: var(--utw-primary);
    font-weight: 700;
    display: inline-block;
    position: relative;
    padding-bottom: 0.65rem;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 70px;
    height: 4px;
    background: linear-gradient(90deg, var(--utw-secondary), var(--utw-gold));
    border-radius: 2px;
}

.section-subtitle {
    font-size: 0.95rem;
    color: var(--utw-text-muted);
    margin-top: 0.5rem;
}

@media (max-width: 576px) {
    .section-title {
        font-size: 1.45rem;
    }
    .section-subtitle {
        font-size: 0.85rem;
    }
}

/* ===============================
   ทำเนียบผู้บริหาร (EXECUTIVES)
================================= */
.executives-section {
    background: #ffffff;
    padding: 3.5rem 0;
    border-bottom: 1px solid var(--utw-card-border);
}

.executive-card {
    background: var(--utw-card-bg);
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid var(--utw-card-border);
    box-shadow: var(--shadow-soft);
    transition: var(--transition);
    text-align: center;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.executive-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
    border-color: var(--utw-gold);
}

.executive-photo-wrap {
    position: relative;
    background: linear-gradient(180deg, #eff6ff 0%, #dbeafe 100%);
    padding-top: 1.25rem;
    overflow: hidden;
}

.executive-photo {
    width: 100%;
    max-height: 240px;
    object-fit: contain;
    transition: var(--transition);
}

.executive-card:hover .executive-photo {
    transform: scale(1.04);
}

.executive-body {
    padding: 1.25rem 1rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.executive-name {
    font-size: 1.08rem;
    font-weight: 700;
    color: var(--utw-primary);
    margin-bottom: 0.25rem;
}

.executive-position {
    font-size: 0.88rem;
    color: var(--utw-secondary);
    font-weight: 500;
    margin-bottom: 0.5rem;
    line-height: 1.35;
}

.executive-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.78rem;
    font-weight: 500;
    background: #f1f5f9;
    color: #475569;
}

.executive-card.director-card {
    border: 2px solid var(--utw-gold);
    box-shadow: 0 8px 30px rgba(217, 119, 6, 0.15);
}

.executive-card.director-card .executive-photo-wrap {
    background: linear-gradient(180deg, #fffbeb 0%, #fef3c7 100%);
}

/* ===============================
   IMAGE BANNER LINKS
================================= */
.banner-links-section {
    background: var(--utw-bg-body);
    padding: 3.5rem 0;
    border-bottom: 1px solid var(--utw-card-border);
}

.banner-link-card {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-soft);
    transition: var(--transition);
    display: block;
    height: 120px;
    background: #ffffff;
    border: 1px solid var(--utw-card-border);
}

.banner-link-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.banner-link-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
    border-color: var(--utw-gold);
}

@media (max-width: 576px) {
    .banner-link-card {
        height: 100px;
    }
}

/* ===============================
   NEWS & ANNOUNCEMENTS SECTION
================================= */
.news-section {
    background: #ffffff;
    padding: 3.5rem 0;
}

.news-tabs {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 6px;
    margin-bottom: 1.5rem;
}

.news-tabs .nav-pills {
    background: #f1f5f9;
    padding: 5px;
    border-radius: 12px;
    display: inline-flex;
    flex-wrap: nowrap;
    border: 1px solid var(--utw-card-border);
    min-width: max-content;
}

.news-tabs .nav-pills .nav-link {
    border-radius: 8px;
    color: #475569;
    font-weight: 500;
    padding: 0.55rem 1.25rem;
    transition: var(--transition);
    white-space: nowrap;
    font-size: 0.92rem;
}

.news-tabs .nav-pills .nav-link.active {
    background: var(--utw-primary);
    color: #ffffff;
    box-shadow: 0 4px 10px rgba(10,37,64,0.2);
}

.news-tabs .nav-pills .nav-link.active-finance {
    background: linear-gradient(135deg, #b91c1c 0%, #dc2626 100%) !important;
    color: #ffffff !important;
}

.news-card {
    background: var(--utw-card-bg);
    border-radius: 14px;
    overflow: hidden;
    border: 1px solid var(--utw-card-border);
    box-shadow: var(--shadow-soft);
    transition: var(--transition);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.news-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
    border-color: #cbd5e1;
}

.news-thumb-wrap {
    position: relative;
    height: 190px;
    overflow: hidden;
    background: #f1f5f9;
}

.news-thumb-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.news-card:hover .news-thumb-wrap img {
    transform: scale(1.05);
}

.news-date-badge {
    position: absolute;
    top: 10px;
    left: 10px;
    background: rgba(10, 37, 64, 0.88);
    backdrop-filter: blur(4px);
    color: #ffffff;
    padding: 3px 8px;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 4px;
}

.news-category-badge {
    position: absolute;
    bottom: 10px;
    left: 10px;
    font-size: 0.75rem;
    padding: 3px 8px;
    border-radius: 6px;
    font-weight: 500;
}

.news-card-body {
    padding: 1.25rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.news-card-title {
    font-size: 1.02rem;
    font-weight: 600;
    color: var(--utw-primary);
    line-height: 1.4;
    margin-bottom: 0.65rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-card:hover .news-card-title {
    color: var(--utw-secondary);
}

.news-card-excerpt {
    font-size: 0.88rem;
    color: var(--utw-text-muted);
    line-height: 1.5;
    margin-bottom: 0.85rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    flex-grow: 1;
}

.news-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.8rem;
    color: #94a3b8;
    border-top: 1px solid #f1f5f9;
    padding-top: 0.65rem;
}

.attachment-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    color: #dc2626;
    background: #fef2f2;
    padding: 3px 8px;
    border-radius: 6px;
    font-size: 0.78rem;
    font-weight: 500;
    border: 1px solid #fee2e2;
}

/* ===============================
   SOCIAL MEDIA WIDGET
================================= */
.social-widget-card {
    background: var(--utw-card-bg);
    border-radius: 16px;
    box-shadow: var(--shadow-soft);
    border: 1px solid var(--utw-card-border);
    overflow: hidden;
}

.social-widget-header {
    background: linear-gradient(135deg, #1877f2 0%, #0d65d9 100%);
    color: #ffffff;
    padding: 1rem 1.25rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.social-widget-body {
    padding: 0.75rem;
    display: flex;
    justify-content: center;
    overflow: hidden;
}

/* ===============================
   FOOTER
================================= */
.site-footer {
    background: var(--utw-footer-bg);
    color: #cbd5e1;
    padding-top: 3.5rem;
    border-top: 4px solid var(--utw-secondary);
    font-size: 0.92rem;
}

.site-footer h5 {
    color: #ffffff;
    font-size: 1.1rem;
    margin-bottom: 1.15rem;
    position: relative;
    padding-bottom: 0.5rem;
}

.site-footer h5::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 36px;
    height: 3px;
    background: var(--utw-gold);
    border-radius: 2px;
}

.site-footer a {
    color: #94a3b8;
}

.site-footer a:hover {
    color: var(--utw-gold);
    padding-left: 4px;
}

.footer-contact-item {
    display: flex;
    gap: 10px;
    margin-bottom: 0.75rem;
    line-height: 1.5;
}

.footer-contact-item i {
    color: var(--utw-gold);
    margin-top: 4px;
}

.site-footer-bottom {
    background: var(--utw-footer-bottom);
    padding: 1.25rem 0;
    margin-top: 3rem;
    border-top: 1px solid rgba(255,255,255,0.08);
    font-size: 0.82rem;
    color: #64748b;
}

/* Back to top button */
.back-to-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: var(--utw-secondary);
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 15px rgba(0,0,0,0.25);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--utw-primary);
    color: #ffffff;
    transform: translateY(-3px);
}

/* ========================================================
   VERTICAL POPUP CAROUSEL MODAL (Requirement 7)
======================================================== */
.splash-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(3, 13, 23, 0.90);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: 99999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    opacity: 1;
    visibility: visible;
    transition: opacity 0.4s ease, visibility 0.4s ease;
}

.splash-modal-overlay.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.splash-modal-box {
    background: #ffffff;
    border-radius: 20px;
    width: 100%;
    max-width: 480px;
    max-height: 94vh;
    overflow: hidden;
    box-shadow: 0 30px 70px rgba(0,0,0,0.5), 0 0 0 1px rgba(255,255,255,0.1);
    display: flex;
    flex-direction: column;
    position: relative;
    animation: zoomInPopup 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes zoomInPopup {
    from { transform: scale(0.82); opacity: 0; }
    to   { transform: scale(1);    opacity: 1; }
}

.splash-modal-header {
    background: linear-gradient(135deg, #0a2540 0%, #1e3a8a 100%);
    color: #ffffff;
    padding: 0.7rem 1.1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 2px solid var(--utw-gold);
    flex-shrink: 0;
}

.splash-modal-body {
    padding: 0;
    overflow: hidden;
    position: relative;
    flex: 1 1 auto;
    min-height: 0;
    background: #111;
}

/* Vertical Carousel */
.vertical-carousel {
    position: relative;
    width: 100%;
    height: 100%;
}

.vertical-carousel .carousel-inner {
    height: 100%;
}

.vertical-carousel .carousel-item {
    height: 62vh;
    min-height: 360px;
    max-height: 560px;
    text-align: center;
    background: #000;
    position: relative;
    overflow: hidden;
}

.splash-poster-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
    display: block;
}

.splash-img-link {
    display: block;
    width: 100%;
    height: 100%;
}

.splash-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 2rem 1rem 0.75rem;
    background: linear-gradient(to top, rgba(0,0,0,0.75) 0%, transparent 100%);
    color: #fff;
    font-size: 0.88rem;
    font-weight: 500;
    text-align: left;
    pointer-events: none;
}

/* Vertical slide transition */
.slide-vertical .carousel-item-next.carousel-item-start,
.slide-vertical .carousel-item-prev.carousel-item-end {
    transform: translateY(0);
}
.slide-vertical .carousel-item-next,
.slide-vertical .active.carousel-item-end {
    transform: translateY(100%);
}
.slide-vertical .carousel-item-prev,
.slide-vertical .active.carousel-item-start {
    transform: translateY(-100%);
}

/* Right-side dot indicators */
.vertical-carousel-indicators {
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: 7px;
    z-index: 20;
    list-style: none;
    padding: 0;
    margin: 0;
}

.vertical-carousel-indicators button {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: rgba(255,255,255,0.45);
    border: none;
    padding: 0;
    cursor: pointer;
    transition: background 0.2s, transform 0.2s;
}

.vertical-carousel-indicators button.active {
    background: var(--utw-gold, #f59e0b);
    transform: scale(1.4);
}

/* Up / Down controls */
.splash-carousel-ctrl {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(0,0,0,0.55);
    color: #fff;
    border: 1px solid rgba(255,255,255,0.25);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 20;
    transition: background 0.2s, transform 0.2s;
    font-size: 0.85rem;
}

.splash-carousel-ctrl:hover {
    background: var(--utw-gold, #f59e0b);
    color: #000;
}

.splash-ctrl-prev { top: 10px; }
.splash-ctrl-next { bottom: 10px; }

.splash-modal-footer {
    background: #ffffff;
    padding: 0.8rem 1.1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-top: 1px solid #e2e8f0;
    flex-wrap: wrap;
    gap: 10px;
    flex-shrink: 0;
}

.btn-enter-site {
    background: linear-gradient(135deg, #d97706 0%, #b45309 100%);
    color: #ffffff !important;
    font-weight: 600;
    border-radius: 50px;
    padding: 0.5rem 1.6rem;
    font-size: 0.95rem;
    box-shadow: 0 4px 15px rgba(217,119,6,0.35);
    transition: var(--transition);
    border: none;
    display: inline-flex;
    align-items: center;
    gap: 7px;
    cursor: pointer;
    font-family: var(--font-main);
}

.btn-enter-site:hover {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(217,119,6,0.45);
}

@media (max-width: 480px) {
    .splash-modal-box { max-width: 100%; border-radius: 16px; }
    .vertical-carousel .carousel-item { height: 55vh; min-height: 300px; }
    .splash-modal-footer { padding: 0.65rem 0.9rem; }
    .btn-enter-site { padding: 0.45rem 1.2rem; font-size: 0.88rem; }
}

/* ========================================================
   NAVBAR & SEARCH ENHANCEMENTS (Requirements 1 & 4)
======================================================== */
.dropdown-menu-wide {
    min-width: 300px;
    max-height: 75vh;
    overflow-y: auto;
}

@media (min-width: 992px) {
    .dropdown-menu-wide {
        min-width: 360px;
    }
}

#siteSearchModal .modal-content {
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.25) !important;
}

.hover-shadow {
    transition: var(--transition);
}

.hover-shadow:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.12) !important;
}

.hover-primary:hover {
    color: var(--utw-secondary, #d97706) !important;
}

/* Multi-Column Mega Menu for Link กลุ่มงาน/โครงการ and large category dropdowns */
.dropdown-menu-mega {
    min-width: 320px;
    max-width: 98vw;
    border-radius: 18px !important;
    border: 1px solid rgba(0, 0, 0, 0.08) !important;
    box-shadow: 0 20px 45px rgba(0, 0, 0, 0.18) !important;
    background: #ffffff;
    z-index: 1050;
}

@media (min-width: 992px) {
    .dropdown-menu-mega {
        min-width: 760px;
        max-width: 920px;
        padding: 1.25rem 1.5rem !important;
    }
    .nav-item.dropdown .dropdown-menu-mega.dropdown-menu-end {
        right: 0 !important;
        left: auto !important;
    }
    .mega-col {
        border-right: 1px solid rgba(0, 0, 0, 0.07);
        padding-right: 1rem;
    }
    .mega-col:last-child {
        border-right: none;
        padding-right: 0.5rem;
    }
}

.mega-header {
    font-size: 0.92rem;
    letter-spacing: 0.3px;
    font-weight: 700;
}

.dropdown-menu-mega .dropdown-item {
    padding: 0.35rem 0.6rem !important;
    border-radius: 8px !important;
    font-size: 0.85rem !important;
    transition: all 0.15s ease-in-out;
    white-space: normal !important;
    line-height: 1.35;
    color: #1e293b;
}

.dropdown-menu-mega .dropdown-item:hover {
    background-color: rgba(217, 119, 6, 0.1) !important;
    color: var(--utw-primary, #0a2540) !important;
    transform: translateX(3px);
}

/* ========================================================
   SPRY / FLYOUT SUBMENU (Link กลุ่มงาน/โครงการ)
   แถวเดียวแบ่งตามกลุ่มงาน และ Spray แยกออกเป็นลิงก์ภายใต้กลุ่มงาน
   (Spray ทางขวามือบน PC/Tablet และ Accordion บน Mobile)
   ======================================================== */
.dropdown-spry-menu {
    min-width: 290px;
    border-radius: 16px !important;
    border: 1px solid rgba(0, 0, 0, 0.08) !important;
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.16) !important;
    background: #ffffff;
    z-index: 1050;
    padding: 0.5rem !important;
}

.dropdown-spry-menu .dropdown-item {
    font-size: 0.92rem;
    padding: 0.65rem 1rem !important;
    transition: all 0.18s ease;
    border-radius: 10px;
    margin: 2px 0;
    color: #1e293b;
}

.dropdown-spry-menu .dropdown-item:hover,
.dropdown-spry-menu .dropdown-submenu:hover > .dropdown-item {
    background-color: rgba(217, 119, 6, 0.12) !important;
    color: var(--utw-primary, #0a2540) !important;
}

.dropdown-spry-menu .spry-arrow {
    transition: transform 0.2s ease, color 0.2s ease;
}

.dropdown-spry-menu .dropdown-submenu:hover .spry-arrow {
    transform: translateX(3px);
    color: var(--utw-secondary, #d97706);
}

/* Desktop & Tablet Landscape Spry Flyout (≥ 992px) - Spray ออกทางขวามือ */
@media (min-width: 992px) {
    .dropdown-submenu {
        position: relative;
    }
    
    /* Spray ออกมาทางขวามือ (Spray to the RIGHT) */
    .dropdown-spry-sub {
        display: none;
        position: absolute;
        top: -6px;
        left: 100% !important;
        right: auto !important;
        margin-left: 6px !important;
        margin-right: 0 !important;
        min-width: 320px;
        max-width: 420px;
        border-radius: 16px !important;
        border: 1px solid rgba(0, 0, 0, 0.08) !important;
        box-shadow: 0 20px 45px rgba(0, 0, 0, 0.22) !important;
        background: #ffffff;
        z-index: 1060;
        max-height: 85vh;
        overflow-y: auto;
        padding: 0.5rem !important;
    }

    /* Open spray to right on hover or click/tap */
    .dropdown-submenu:hover > .dropdown-spry-sub,
    .dropdown-submenu.open > .dropdown-spry-sub {
        display: block;
        animation: spryFadeInRight 0.18s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    }

    @keyframes spryFadeInRight {
        from {
            opacity: 0;
            transform: translateX(-12px);
        }
        to {
            opacity: 1;
            transform: translateX(0);
        }
    }

    /* Safety fallback: if viewport edge is reached, flip to left smoothly */
    .dropdown-spry-sub.spray-flip-left {
        left: auto !important;
        right: 100% !important;
        margin-left: 0 !important;
        margin-right: 6px !important;
        animation: spryFadeInLeft 0.18s cubic-bezier(0.16, 1, 0.3, 1) forwards !important;
    }

    @keyframes spryFadeInLeft {
        from {
            opacity: 0;
            transform: translateX(12px);
        }
        to {
            opacity: 1;
            transform: translateX(0);
        }
    }
}

/* Submenu items formatting */
.dropdown-spry-sub .dropdown-item {
    font-size: 0.88rem;
    padding: 0.5rem 0.85rem !important;
    border-radius: 8px;
    margin: 2px 0;
    transition: all 0.15s ease;
    color: #334155;
    white-space: normal !important;
    word-break: break-word;
}

.dropdown-spry-sub .dropdown-item:hover {
    background-color: rgba(217, 119, 6, 0.12) !important;
    color: var(--utw-primary, #0a2540) !important;
    padding-left: 1.05rem !important;
}

.dropdown-spry-sub .dropdown-item.active {
    background-color: var(--utw-primary, #0a2540) !important;
    color: #ffffff !important;
}

/* Mobile & Tablet Portrait Accordion Style (< 992px) */
@media (max-width: 991.98px) {
    .dropdown-spry-menu {
        min-width: 100%;
        border-radius: 12px !important;
        border: 1px solid rgba(0, 0, 0, 0.08) !important;
        box-shadow: none !important;
        padding: 0.35rem !important;
    }

    .dropdown-spry-sub {
        display: none;
        position: static;
        background: #f8fafc;
        border-radius: 10px;
        margin: 4px 6px;
        border: 1px solid #e2e8f0 !important;
        box-shadow: none !important;
        max-height: none;
        padding: 0.35rem !important;
    }

    .dropdown-submenu.open > .dropdown-spry-sub {
        display: block;
        animation: spryAccordionDown 0.2s ease-out forwards;
    }

    .dropdown-submenu.open .spry-arrow {
        transform: rotate(90deg) !important;
        color: var(--utw-secondary, #d97706);
    }

    @keyframes spryAccordionDown {
        from {
            opacity: 0;
            transform: translateY(-6px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }
}