/* ==========================================================================
       BAUKASTEN DESIGN SYSTEM - EMBEDDED IN SINGLE FILE
       ========================================================================== */
    :root {
      --primary: #800000;
      --primary-dark: #4a0000;
      --accent: #b22222;
      --accent-2: #cd853f;
      --accent-3: #2fb8a6;
      --text-main: #1a0a0a;
      --text-muted: #6b5252;
      --card-bg: #ffffff;
      --bg-start: #fff5f5;
      --bg-end:   #fdeaea;
      --border-soft: rgba(74, 0, 0, 0.12);
      --shadow-md: 0 14px 32px rgba(74, 0, 0, 0.14);
      --radius-sm: 12px;
      --radius-md: 18px;
      --grad-hero: linear-gradient(120deg, #4a0000 0%, #800000 50%, #b22222 100%);
      --gold: #c8960c;
      --gold-light: #f0c040;
      --ink: #2a1a1a;
      --page-max: 1120px;
    }

    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; }

    body {
      font-family: 'Inter', sans-serif;
      background:
        radial-gradient(1200px 500px at 10% -10%, rgba(255, 122, 61, 0.10), transparent 60%),
        radial-gradient(1000px 500px at 100% 0%, rgba(107, 79, 214, 0.08), transparent 55%),
        linear-gradient(180deg, var(--bg-start) 0%, var(--bg-end) 100%);
      background-attachment: fixed;
      color: var(--text-main);
      min-height: 100vh;
      line-height: 1.6;
    }
    a { color: inherit; text-decoration: none; }
    button { font-family: inherit; cursor: pointer; }

    @keyframes marquee { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }
    @keyframes fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }

    /* Admin Floating Toolbar */
    .admin-bar {
      background: #0f172a; color: #f8fafc; padding: 10px 20px; font-size: 13.5px;
      display: none; align-items: center; justify-content: space-between; gap: 10px;
      position: sticky; top: 0; z-index: 1000; box-shadow: 0 4px 12px rgba(0,0,0,0.3);
    }
    .admin-bar.show { display: flex; }
    .admin-btn-sm {
      background: #2563eb; color: #fff; border: none; padding: 5px 12px; border-radius: 6px;
      font-size: 12.5px; font-weight: 700; cursor: pointer; display: inline-flex; align-items: center; gap: 4px;
    }
    .admin-btn-sm:hover { background: #1d4ed8; }

    /* Top Bar & Marquee */
    .top-bar {
      background: var(--primary-dark);
      background-image: linear-gradient(90deg, var(--primary-dark), #4c0a1f 60%, var(--primary-dark));
      color: #fff; padding: 8px 0; overflow: hidden;
    }
    .marquee-container { width: 100%; overflow: hidden; white-space: nowrap; }
    .marquee-track { display: inline-flex; animation: marquee 26s linear infinite; }
    .marquee-container:hover .marquee-track { animation-play-state: paused; }
    .marquee-text {
      font-size: 13.5px; font-weight: 700; padding: 0 24px; color: #ffd9a0;
    }

    /* News Ticker Bar (below the menu) */
    .news-ticker-bar {
      background: linear-gradient(90deg, var(--gold) 0%, var(--gold-light) 55%, var(--gold) 100%);
      padding: 7px 0; overflow: hidden;
      border-bottom: 1px solid rgba(74,0,0,0.12);
      box-shadow: 0 2px 8px rgba(200,150,12,0.18);
    }
    .news-ticker-text { color: #3a2400 !important; font-weight: 800; }

    /* Brand Header & Ultra Crisp HD Logo Styling */
    .brand-header {
      background: var(--grad-hero);
      position: relative; padding: 20px 0;
      box-shadow: var(--shadow-md);
    }
    .brand-header-content {
      max-width: var(--page-max); margin: 0 auto;
      display: flex; align-items: flex-end; justify-content: space-between;
      gap: 16px; flex-wrap: nowrap; padding: 0 20px;
    }
    .brand-logo-container { display: flex; align-items: center; gap: 16px; position: relative; flex: 1; min-width: 0; }
    .main-logo {
      width: 72px;
      height: 72px;
      border-radius: 50%;
      object-fit: cover;
      flex-shrink: 0;
      border: 3.5px solid #ffffff;
      background: #ffffff;
      box-shadow: 0 8px 24px rgba(0,0,0,0.30);
      image-rendering: auto;
      image-rendering: smooth;
      image-rendering: -webkit-optimize-contrast;
      transform: translateZ(0);
      backface-visibility: hidden;
      transition: transform 0.25s ease, box-shadow 0.25s ease;
    }
    .main-logo:hover {
      transform: scale(1.06) translateZ(0);
      box-shadow: 0 12px 30px rgba(0,0,0,0.40);
    }
    .brand-text { display: flex; flex-direction: column; align-items: center; text-align: center; min-width: 0; }
    .brand-text h1 {
      font-family: 'Baloo Thambi 2', sans-serif;
      font-size: clamp(18px, 3.2vw, 32px);
      font-weight: 900; color: #f3f3ea;
      text-shadow: 0 2px 10px rgba(0,0,0,0.35);
      text-align: center; margin: 0;
      white-space: nowrap;
      letter-spacing: 0.5px;
    }
    #header-title-en {
      font-family: 'Outfit', sans-serif;
      font-size: clamp(14px, 2.4vw, 20px); color: #f4f3f1; font-weight: 700;
      letter-spacing: 1px; text-transform: uppercase; opacity: 0.92;
      text-align: center; margin-top: 2px; letter-spacing: 0.5px; text-shadow: 0 2px 6px rgba(0,0,0,0.2);
      white-space: nowrap;
    }
    .brand-motto-sub { font-size: 13px; color: rgba(255,255,255,0.92); font-weight: 600; margin-top: 2px; text-align: center; white-space: nowrap; }

    .header-contact-right { display: flex; align-items: center; gap: 8px; flex-wrap: nowrap; flex-shrink: 0; align-self: flex-end; margin-bottom: 2px; }
    .header-contact-item {
      display: inline-flex; align-items: center; gap: 6px; color: #fff;
      font-size: 12px; font-weight: 700; padding: 6px 12px; border-radius: 999px;
      background: rgba(255,255,255,0.18); border: 1px solid rgba(255,255,255,0.25);
      white-space: nowrap; text-decoration: none;
    }
    @media(max-width: 850px) {
      .header-contact-right { flex-direction: column; align-items: flex-end; gap: 4px; }
      .header-contact-item { padding: 4px 10px; font-size: 11px; }
    }

    /* Sticky Navbar */
    .main-navbar {
      background: rgba(255,255,255,0.95); backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-soft);
      position: sticky; top: 0; z-index: 100; box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    }
    .nav-container {
      max-width: var(--page-max); margin: 0 auto; display: flex; align-items: center; justify-content: center;
      padding: 0 16px; min-height: 52px;
    }
    .nav-links { display: flex; gap: 4px; flex-wrap: wrap; justify-content: center; }
    .nav-link {
      padding: 12px 14px; color: var(--text-main); font-size: 14px; font-weight: 700;
      border-radius: 8px; transition: all 0.2s; cursor: pointer; border: none; background: none;
    }
    .nav-link:hover, .nav-link.active { color: var(--primary); background: rgba(128, 0, 0, 0.08); }

    /* Main Container */
    main { max-width: var(--page-max); margin: 0 auto; padding: 24px 16px 60px; }
    .page { display: none; animation: fadeIn 0.3s ease; }
    .page.active { display: block; }

    /* Quick Hero Grid & Portal Cards (100% thamilalayam.net ORIGINAL Design & Colors) */
    .hero-banner-grid {
      display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 22px; margin-bottom: 30px;
    }
    .portal-card {
      background: #ffffff !important;
      border: 1px solid rgba(74, 0, 0, 0.10) !important;
      border-radius: 18px !important;
      padding: 26px 22px !important;
      text-decoration: none;
      color: #334155 !important;
      display: flex; flex-direction: column; gap: 12px;
      box-shadow: 0 6px 18px rgba(74, 0, 0, 0.08);
      transition: all 0.35s cubic-bezier(0.25, 0.8, 0.25, 1);
      position: relative; overflow: hidden;
      cursor: pointer;
      min-height: 160px;
      box-sizing: border-box;
    }
    .portal-card::before {
      content: ''; position: absolute; top: 0; left: 0; right: 0; height: 5px;
      background: linear-gradient(120deg, #4a0000 0%, #800000 45%, #b22222 100%);
    }
    .hero-banner-grid .portal-card:nth-child(6n+2)::before { background: linear-gradient(90deg, #b22222, #cd853f); }
    .hero-banner-grid .portal-card:nth-child(6n+3)::before { background: linear-gradient(90deg, #2fb8a6, #6fd8c8); }
    .hero-banner-grid .portal-card:nth-child(6n+4)::before { background: linear-gradient(90deg, var(--gold), var(--gold-light)); }
    .hero-banner-grid .portal-card:nth-child(6n+5)::before { background: linear-gradient(90deg, #800000, #b22222); }
    .hero-banner-grid .portal-card:nth-child(6n+6)::before { background: linear-gradient(90deg, #cd853f, #2fb8a6); }

    .portal-card:hover {
      transform: translateY(-8px) scale(1.015);
      box-shadow: 0 24px 48px rgba(74, 0, 0, 0.22);
      border-color: rgba(128,0,0,0.25) !important;
    }
    .portal-card .card-icon {
      font-size: 26px; width: 54px; height: 54px;
      background: linear-gradient(120deg, #4a0000 0%, #800000 45%, #b22222 100%);
      border-radius: 16px;
      display: flex; align-items: center; justify-content: center;
      color: #ffffff; box-shadow: 0 8px 18px rgba(128,0,0,0.28);
      transition: all 0.35s ease;
      margin-bottom: 2px;
      flex-shrink: 0;
    }
    .hero-banner-grid .portal-card:nth-child(6n+2) .card-icon { background: linear-gradient(120deg, #b22222, #cd853f); box-shadow: 0 8px 18px rgba(255,122,61,0.3); }
    .hero-banner-grid .portal-card:nth-child(6n+3) .card-icon { background: linear-gradient(120deg, #2fb8a6, #6fd8c8); box-shadow: 0 8px 18px rgba(47,184,166,0.3); }
    .hero-banner-grid .portal-card:nth-child(6n+4) .card-icon { background: linear-gradient(120deg, var(--gold), var(--gold-light)); box-shadow: 0 8px 18px rgba(200,150,12,0.3); }
    .hero-banner-grid .portal-card:nth-child(6n+5) .card-icon { background: linear-gradient(120deg, #800000, #b22222); }
    .hero-banner-grid .portal-card:nth-child(6n+6) .card-icon { background: linear-gradient(120deg, #cd853f, #2fb8a6); }

    .portal-card:hover .card-icon { transform: scale(1.12) rotate(-6deg); }
    .portal-card h3 { font-family: 'Outfit', sans-serif; font-size: 18.5px; font-weight: 800; color: #250a17 !important; letter-spacing: -0.2px; text-align: left; }
    .portal-card p { font-size: 13.5px; color: #6b5a62 !important; line-height: 1.6; margin-bottom: 4px; flex-grow: 1; text-align: left; }
    .card-action { font-size: 13px; font-weight: 800; color: #800000 !important; display: flex; align-items: center; gap: 2px; transition: gap 0.2s ease; margin-top: auto; letter-spacing: 0.3px; }
    .portal-card:hover .card-action { gap: 8px; }

    /* Cards & Lists */
    .content-card {
      background: var(--card-bg); border-radius: var(--radius-md); padding: 24px;
      box-shadow: var(--shadow-md); border: 1px solid var(--border-soft); margin-bottom: 24px;
      position: relative;
    }
    .section-title {
      font-family: 'Outfit', 'Baloo Thambi 2', sans-serif;
      font-size: clamp(20px, 3.8vw, 26px);
      font-weight: 800;
      background: var(--grad-hero);
      -webkit-background-clip: text; background-clip: text; color: transparent;
      text-align: center; margin: 30px auto 18px;
      position: relative; padding-bottom: 14px;
      display: flex; align-items: center; justify-content: center; width: 100%;
    }
    .section-title::after {
      content: ''; position: absolute; bottom: 0; left: 50%;
      transform: translateX(-50%); width: 64px; height: 5px;
      background: linear-gradient(120deg, #b22222 0%, #cd853f 100%); border-radius: 3px;
    }

    /* Forms */
    .form-group { margin-bottom: 18px; }
    .form-group label { display: block; font-size: 13.5px; font-weight: 700; color: var(--text-main); margin-bottom: 6px; }
    .form-group input, .form-group select, .form-group textarea {
      width: 100%; padding: 12px 14px; border-radius: 10px; border: 1.5px solid var(--border-soft);
      background: #fafafa; font-size: 14.5px; font-family: inherit; color: var(--text-main);
    }
    .form-group input:focus, .form-group select:focus, .form-group textarea:focus {
      outline: none; border-color: var(--primary); background: #fff; box-shadow: 0 0 0 3px rgba(128,0,0,0.12);
    }

    /* Results Table */
    table.results-table {
      width: 100%; border-collapse: collapse; background: #fff; border-radius: 12px; overflow: hidden; border: 1px solid var(--border-soft);
    }
    table.results-table th, table.results-table td {
      padding: 12px 16px; text-align: left; border-bottom: 1px solid var(--border-soft); font-size: 14px;
    }
    table.results-table th { background: var(--primary-dark); color: #fff; font-weight: 700; }


    /* Modal Overlay */
    .modal-overlay {
      position: fixed; inset: 0; background: rgba(0,0,0,0.6); backdrop-filter: blur(4px);
      display: none; align-items: center; justify-content: center; z-index: 1000; padding: 20px;
    }
    .modal-overlay.show { display: flex; }
    .modal {
      background: #fff; border-radius: 20px; max-width: 560px; width: 100%;
      max-height: 88vh; overflow-y: auto; padding: 28px; box-shadow: 0 25px 50px rgba(0,0,0,0.3);
    }
    .modal-close { float: right; background: none; border: none; font-size: 24px; color: var(--text-muted); cursor: pointer; }

    /* Toast */
    .toast {
      position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%) translateY(20px);
      background: var(--primary-dark); color: #fff; padding: 12px 24px; border-radius: 30px;
      font-size: 14px; font-weight: 700; opacity: 0; pointer-events: none; transition: 0.3s; z-index: 2000;
    }
    .toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

    /* Inline Edit Quick Controls */
    .inline-edit-btn {
      background: #3b82f6; color: #fff; border: none; border-radius: 6px; padding: 3px 8px;
      font-size: 11.5px; font-weight: bold; cursor: pointer; margin-left: 8px; vertical-align: middle;
    }
    .inline-edit-btn:hover { background: #2563eb; }
    .inline-delete-btn {
      background: #ef4444; color: #fff; border: none; border-radius: 6px; padding: 3px 8px;
      font-size: 11.5px; font-weight: bold; cursor: pointer; margin-left: 4px; vertical-align: middle;
    }
    .inline-delete-btn:hover { background: #dc2626; }

    /* Photo Gallery Grid Styling */
    .gallery-grid-container {
      display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 16px; margin-top: 16px;
    }
    .gallery-card {
      border-radius: 14px; overflow: hidden; border: 1px solid var(--border-soft);
      box-shadow: var(--shadow-md); background: #fff; position: relative; transition: transform 0.2s;
    }
    .gallery-card:hover { transform: scale(1.02); }
    .gallery-card img { width: 100%; height: 190px; object-fit: cover; display: block; }
    .gallery-card .caption { padding: 12px; font-size: 13.5px; font-weight: 700; text-align: center; color: var(--primary-dark); }

    /* Mobile Navigation & Hamburger */
    .mobile-toggle { display: none; background: transparent; color: #fff; border: none; padding: 8px; border-radius: 6px; cursor: pointer; }
    .mobile-login-btn { display: none; }

    /* Prevent Horizontal Overflow Globally */
    html, body {
      max-width: 100vw;
      overflow-x: hidden !important;
    }

    /* Ultra-Responsive Mobile Design Adjustments - Premium Crimson Flow */
    @media (max-width: 768px) {
      .top-bar { padding: 4px 0; max-width: 100vw; overflow: hidden; }
      .brand-header { padding: 20px 0 14px; max-width: 100vw; overflow: hidden; }
      .brand-header-content {
        flex-direction: column;
        align-items: center;
        text-align: center;
        gap: 12px;
        padding: 0 14px;
        max-width: 100vw;
      }
      .brand-logo-container {
        flex-direction: row;
        align-items: center;
        justify-content: center;
        text-align: center;
        gap: 12px;
        width: 100%;
      }
      .main-logo {
      width: 72px;
      height: 72px;
      border-radius: 50%;
      object-fit: cover;
      flex-shrink: 0;
      border: 3.5px solid #ffffff;
      background: #ffffff;
      box-shadow: 0 8px 24px rgba(0,0,0,0.30);
      image-rendering: auto;
      image-rendering: smooth;
      image-rendering: -webkit-optimize-contrast;
      transform: translateZ(0);
      backface-visibility: hidden;
      transition: transform 0.25s ease, box-shadow 0.25s ease;
    }
    .main-logo:hover {
      transform: scale(1.06) translateZ(0);
      box-shadow: 0 12px 30px rgba(0,0,0,0.40);
    }
      .brand-text {
        align-items: center;
        text-align: center;
        width: auto;
      }
      .brand-text h1 {
        font-size: clamp(13px, 4.2vw, 22px);
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        max-width: calc(100vw - 110px);
        line-height: 1.25;
        text-align: center;
        font-weight: 900;
        margin-bottom: 2px;
      }
      #header-title-en {
        font-size: clamp(10px, 3vw, 15px);
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        max-width: calc(100vw - 110px);
        text-align: center;
        color: #f4f1ed;
        margin-top: 2px;
        font-weight: 600;
        letter-spacing: 0.6px;
      }
      .brand-motto-sub {
        font-size: 13px;
        white-space: normal;
        text-align: center;
        color: #f5f4ef;
        margin-top: 4px;
        font-weight: 700;
        letter-spacing: 0.5px;
      }
      .header-contact-right {
        display: flex !important;
        flex-direction: row !important;
        align-items: center !important;
        justify-content: center !important;
        gap: 8px !important;
        flex-wrap: nowrap !important;
        width: 100% !important;
        margin-top: 8px !important;
      }
      .header-contact-item {
        padding: 6px 14px !important;
        font-size: 12px !important;
        font-weight: 800 !important;
        border-radius: 20px !important;
        background: rgba(255,255,255,0.2) !important;
        border: 1px solid rgba(255,255,255,0.35) !important;
        color: #ffffff !important;
        backdrop-filter: blur(6px);
      }

      /* Mobile Navigation Menu Bar - Seamless Crimson Gradient Continuation */
      .main-navbar {
        background: linear-gradient(180deg, #4a0000 0%, #4c0a1f 100%) !important;
        border-bottom: 2px solid rgba(255, 255, 255, 0.15) !important;
        box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3) !important;
        padding: 6px 12px !important;
      }
      .nav-container {
        min-height: 46px !important;
        padding: 0 !important;
        display: flex !important;
        flex-wrap: wrap !important;
        align-items: center !important;
        justify-content: space-between !important;
      }
      .mobile-toggle {
        display: inline-flex !important;
        align-items: center !important;
        justify-content: center !important;
        width: 42px !important;
        height: 42px !important;
        margin: 4px 0 !important;
        padding: 0 !important;
        border-radius: 12px !important;
        background: linear-gradient(135deg, #800000, #4a0000) !important;
        color: #ffffff !important;
        box-shadow: 0 4px 14px rgba(0,0,0,0.35) !important;
        cursor: pointer !important;
        border: 1.5px solid rgba(255, 255, 255, 0.35) !important;
        order: 1 !important;
      }
      .mobile-login-btn {
        display: inline-flex !important;
        align-items: center !important;
        justify-content: center !important;
        width: 42px !important;
        height: 42px !important;
        margin: 4px 0 !important;
        padding: 0 !important;
        border-radius: 12px !important;
        background: linear-gradient(135deg, #800000, #4a0000) !important;
        color: #ffffff !important;
        box-shadow: 0 4px 14px rgba(0,0,0,0.35) !important;
        cursor: pointer !important;
        border: 1.5px solid rgba(255, 255, 255, 0.35) !important;
        font-size: 17px !important;
        order: 3 !important;
      }
      .nav-links {
        display: none !important;
        flex-direction: column !important;
        width: 100% !important;
        padding: 12px 0 6px !important;
        gap: 8px !important;
        order: 2 !important;
      }
      .nav-links.open { display: flex !important; }
      .nav-links #nav_login { display: none !important; }
      .nav-link {
        width: 100% !important;
        text-align: center !important;
        padding: 13px 16px !important;
        font-size: 15px !important;
        font-weight: 800 !important;
        border-radius: 10px !important;
        color: #ffffff !important;
        background: rgba(255, 255, 255, 0.12) !important;
        border: 1px solid rgba(255, 255, 255, 0.2) !important;
      }
      .nav-link:hover, .nav-link.active {
        background: #ffffff !important;
        color: var(--primary-dark) !important;
      }

      /* Floating WhatsApp Button Alignment on Mobile */
      #whatsappFloatBtn {
        width: 48px !important;
        height: 48px !important;
        bottom: 18px !important;
        right: 14px !important;
        box-shadow: 0 4px 16px rgba(37,211,102,0.5) !important;
        z-index: 9999 !important;
      }

      main { padding: 18px 12px 100px !important; }
      .content-card { padding: 20px 14px !important; border-radius: 16px !important; }
      .section-title { font-size: 18px !important; flex-wrap: wrap !important; gap: 8px !important; }
    }



    @media (max-width: 600px) {
      .hero-banner-grid {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 12px !important;
        align-items: stretch !important;
      }
      .hero-card {
        flex-direction: column !important;
        align-items: center !important;
        justify-content: center !important;
        text-align: center !important;
        padding: 16px 10px !important;
        border-radius: 16px !important;
        height: 100% !important;
        min-height: 145px !important;
        box-sizing: border-box !important;
      }
      .hero-card .icon-box {
        width: 48px !important;
        height: 48px !important;
        font-size: 24px !important;
        margin-bottom: 6px !important;
        margin-right: 0 !important;
        flex-shrink: 0 !important;
      }
      .hero-card-title {
        font-size: 14px !important;
        text-align: center !important;
        justify-content: center !important;
        align-items: center !important;
        line-height: 1.3 !important;
        width: 100% !important;
      }
      .hero-card-subtitle {
        font-size: 11.5px !important;
        text-align: center !important;
        line-height: 1.3 !important;
        margin-top: 4px !important;
        width: 100% !important;
      }
      .gallery-grid-container {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 12px !important;
      }
      table.results-table th, table.results-table td {
        padding: 8px 10px;
        font-size: 12px;
      }
      .modal { padding: 18px 14px; border-radius: 16px; width: 95%; }
    }

    @media (max-width: 380px) {
      .hero-banner-grid {
        grid-template-columns: 1fr;
      }
      .gallery-grid-container {
        grid-template-columns: 1fr !important;
      }
    }

    /* Printable Student ID Pass Card Styling */
    @media print {
      body * { visibility: hidden !important; }
      #modalOverlay, #modalOverlay *, #modalContent, #modalContent * { visibility: visible !important; }
      #modalOverlay { position: absolute !important; inset: 0 !important; background: #fff !important; display: block !important; padding: 0 !important; }
      #modalContent { max-width: 100% !important; width: 100% !important; padding: 0 !important; box-shadow: none !important; border: none !important; }
      .modal-close, .no-print { display: none !important; }
    }
  
    /* Animated Floating Student Portal Styling (Home Theme Burgundy/Maroon) */
    @keyframes floatIcon {
      0%, 100% { transform: translateY(0) rotate(0deg); }
      50% { transform: translateY(-10px) rotate(3deg); }
    }

    @keyframes pulseGlow {
      0%, 100% { box-shadow: 0 0 25px rgba(128, 0, 0, 0.4), inset 0 0 15px rgba(255, 255, 255, 0.3); }
      50% { box-shadow: 0 0 45px rgba(178, 34, 34, 0.75), inset 0 0 25px rgba(255, 255, 255, 0.6); }
    }

    @keyframes gradientShift {
      0% { background-position: 0% 50%; }
      50% { background-position: 100% 50%; }
      100% { background-position: 0% 50%; }
    }

    .student-portal-card {
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border: 2.5px solid rgba(255, 255, 255, 0.9);
      border-radius: 28px;
      box-shadow: 0 25px 60px rgba(74, 0, 0, 0.20), 0 10px 25px rgba(0, 0, 0, 0.06);
      overflow: hidden;
      position: relative;
      transition: transform 0.3s ease, box-shadow 0.3s ease;
    }

    @keyframes kolamBorderGlow {
      0%, 100% { opacity: 0.55; }
      50% { opacity: 1; }
    }
    @keyframes lampSwingGlow {
      0%, 100% { transform: rotate(-3deg); filter: drop-shadow(0 0 10px rgba(255,193,7,0.75)); }
      50% { transform: rotate(3deg); filter: drop-shadow(0 0 18px rgba(255,193,7,0.95)); }
    }

    /* Kolam dotted strip along the very top edge of the login header, like a doorstep kolam */
    .student-portal-header::after {
      content: '';
      position: absolute; top: 0; left: 0; right: 0; height: 7px;
      background-image: radial-gradient(circle, #ffd700 1.6px, transparent 1.6px);
      background-size: 14px 7px;
      background-repeat: repeat-x;
      animation: kolamBorderGlow 2.4s ease-in-out infinite;
      z-index: 3;
    }

    .student-portal-header {
      background: linear-gradient(135deg, #300000 0%, #4a0000 35%, #800000 70%, #b22222 100%);
      background-size: 200% 200%;
      animation: gradientShift 10s ease infinite;
      padding: 38px 24px 30px;
      text-align: center;
      position: relative;
      overflow: hidden;
    }

    .student-portal-header::before {
      content: '';
      position: absolute;
      top: -50%;
      left: -50%;
      width: 200%;
      height: 200%;
      background:
        radial-gradient(circle, rgba(255,255,255,0.15) 0%, transparent 60%),
        radial-gradient(rgba(255,215,0,0.14) 1.2px, transparent 1.2px);
      background-size: auto, 22px 22px;
      pointer-events: none;
    }

    .student-badge-icon {
      width: 86px;
      height: 86px;
      background: linear-gradient(135deg, rgba(255,255,255,0.28), rgba(255,255,255,0.10));
      border: 3px solid rgba(255, 215, 0, 0.75);
      border-radius: 50%;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      margin-bottom: 14px;
      backdrop-filter: blur(10px);
      position: relative;
      z-index: 2;
      overflow: hidden;
    }
    .badge-kolam-svg {
      width: 76%; height: 76%;
      animation: kolamFlowerSpin 6s linear infinite;
      filter: drop-shadow(0 0 6px rgba(255,193,7,0.6));
    }

    .student-input-wrap {
      position: relative;
    }

    .student-input-field {
      width: 100%;
      padding: 16px 18px 16px 48px;
      border: 2px solid #e2e8f0;
      border-radius: 16px;
      font-size: 15px;
      font-weight: 700;
      color: #1a0a0a;
      background: #f8fafc;
      transition: all 0.25s ease;
      font-family: inherit;
    }
    .student-input-field:focus {
      border-color: #800000;
      background: #ffffff;
      box-shadow: 0 0 0 4px rgba(128, 0, 0, 0.15);
      outline: none;
    }

    .student-input-icon {
      position: absolute;
      left: 16px;
      top: 50%;
      transform: translateY(-50%);
      font-size: 20px;
      pointer-events: none;
      color: #6b5252;
      transition: color 0.2s;
    }
    .student-input-field:focus + .student-input-icon {
      color: #800000;
    }

    .student-login-submit-btn {
      width: 100%;
      padding: 17px;
      background: linear-gradient(135deg, #4a0000 0%, #800000 50%, #b22222 100%);
      color: #ffffff;
      border: none;
      border-radius: 16px;
      font-weight: 800;
      font-size: 16.5px;
      letter-spacing: 0.5px;
      cursor: pointer;
      box-shadow: 0 10px 25px rgba(128, 0, 0, 0.35);
      transition: all 0.25s ease;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 10px;
    }
    .student-login-submit-btn:hover {
      transform: translateY(-3px) scale(1.01);
      box-shadow: 0 14px 35px rgba(128, 0, 0, 0.45);
      background: linear-gradient(135deg, #5c0000 0%, #990000 50%, #c41e3a 100%);
    }

    /* 🪔 Tamil Kolam & Kuthu Vilakku Themed 3D Preloader */
    @keyframes spin3DRing {
      0% { transform: rotateX(55deg) rotateY(20deg) rotateZ(0deg); }
      100% { transform: rotateX(55deg) rotateY(20deg) rotateZ(360deg); }
    }

    @keyframes spin3DRingReverse {
      0% { transform: rotateX(55deg) rotateY(-20deg) rotateZ(360deg); }
      100% { transform: rotateX(55deg) rotateY(-20deg) rotateZ(0deg); }
    }

    @keyframes kolamFlowerSpin {
      0% { transform: rotate(0deg) scale(1); }
      50% { transform: rotate(180deg) scale(1.05); }
      100% { transform: rotate(360deg) scale(1); }
    }

    @keyframes lampFlameFlicker {
      0%, 100% { transform: scale(1) rotate(-1deg); filter: drop-shadow(0 0 14px #ffb020) drop-shadow(0 0 26px #ff7a00); }
      35% { transform: scale(1.14) rotate(1.5deg); filter: drop-shadow(0 0 20px #ffcf4d) drop-shadow(0 0 36px #ff9500); }
      65% { transform: scale(0.94) rotate(-2deg); filter: drop-shadow(0 0 16px #ffb020) drop-shadow(0 0 28px #ff7a00); }
    }

    @keyframes goldShimmerText {
      0%, 100% { background-position: 0% 50%; }
      50% { background-position: 100% 50%; }
    }

    .spinner-3d-overlay {
      position: fixed;
      inset: 0;
      background:
        radial-gradient(circle at 50% 38%, rgba(178,34,34,0.35), transparent 55%),
        radial-gradient(ellipse at 50% 100%, rgba(200,150,12,0.18), transparent 60%),
        linear-gradient(180deg, #1a0000 0%, #2d0000 45%, #200000 100%);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      z-index: 999999;
      transition: opacity 0.4s ease;
      overflow: hidden;
    }
    .spinner-3d-overlay::before {
      content: '';
      position: absolute; inset: 0;
      background-image: radial-gradient(rgba(255,215,0,0.16) 1.4px, transparent 1.4px);
      background-size: 26px 26px;
      opacity: 0.5;
      pointer-events: none;
    }

    .spinner-3d-container {
      position: relative;
      width: 150px;
      height: 150px;
      display: flex;
      align-items: center;
      justify-content: center;
      perspective: 800px;
    }

    .kolam-flower-svg {
      position: absolute;
      width: 150px;
      height: 150px;
      animation: kolamFlowerSpin 6s linear infinite;
      filter: drop-shadow(0 0 14px rgba(255,193,7,0.65));
    }

    .spinner-3d-ring {
      position: absolute;
      width: 110px;
      height: 110px;
      border: 4px solid transparent;
      border-top: 4px solid #ffd700;
      border-right: 4px solid #ffb020;
      border-bottom: 4px solid #c8960c;
      border-radius: 50%;
      animation: spin3DRing 1.4s linear infinite;
      box-shadow: 0 0 30px rgba(255,193,7,0.55), inset 0 0 18px rgba(255,193,7,0.35);
    }

    .spinner-3d-ring-outer {
      position: absolute;
      width: 135px;
      height: 135px;
      border: 2.5px solid transparent;
      border-left: 2.5px solid #ffedb3;
      border-right: 2.5px solid #b22222;
      border-radius: 50%;
      animation: spin3DRingReverse 2s linear infinite;
      box-shadow: 0 0 22px rgba(255,215,0,0.4);
    }

    .spinner-3d-core {
      position: absolute;
      width: 58px;
      height: 58px;
      background: radial-gradient(circle, rgba(255,180,50,0.28), rgba(128,0,0,0.12));
      border: 2px solid rgba(255,215,0,0.85);
      border-radius: 50%;
      animation: lampFlameFlicker 1.6s ease-in-out infinite;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 28px;
      backdrop-filter: blur(8px);
    }

    .preloader-gold-text {
      background: linear-gradient(90deg, #ffd700, #fff3c4, #c8960c, #ffd700);
      background-size: 300% 100%;
      -webkit-background-clip: text; background-clip: text;
      -webkit-text-fill-color: transparent;
      animation: goldShimmerText 3s ease-in-out infinite;
    }

/* A4 PRINT GRID OPTIMIZATION FOR STUDENT ID PASSES (ITEM 5 FIX) */
@media print {
  @page {
    size: A4 portrait;
    margin: 8mm;
  }
  body * { visibility: hidden !important; }
  #modalOverlay, #modalOverlay *, #modalContent, #modalContent * { visibility: visible !important; }
  #modalOverlay { position: absolute !important; inset: 0 !important; background: #fff !important; display: block !important; padding: 0 !important; }
  #modalContent { max-width: 100% !important; width: 100% !important; padding: 0 !important; box-shadow: none !important; border: none !important; }
  .modal-close, .no-print { display: none !important; }

  .printable-id-grid {
    display: grid !important;
    grid-template-columns: repeat(2, 1fr) !important;
    gap: 14px !important;
    justify-content: center !important;
    page-break-inside: avoid !important;
  }
  .printable-id-card {
    page-break-inside: avoid !important;
    break-inside: avoid !important;
    margin: 4px auto !important;
  }
}