:root {
    --bg: #f6f7fb;
    --surface: #ffffff;
    --text: #111111;
    --muted: #5f6673;
    --primary: #ff1f2d; /* Vibrant TEDx Red */
    --accent: #ffb703;
    --accent-cool: #00c2ff;
    --border: #d7dce5;
    --focus: rgba(255, 31, 45, 0.38);
    --shadow-sm: 0 2px 8px rgba(17, 17, 17, 0.08);
    --shadow-md: 0 10px 26px rgba(17, 17, 17, 0.12);
    --radius: 12px;
    --font-main: 'Helvetica Neue', Arial, sans-serif;
}
[data-theme="dark"] {
    --bg: #0b0b0f;
    --surface: #12131a;
    --text: #f5f6f8;
    --muted: #a0a7b5;
    --border: #2a2f3a;
    --focus: rgba(255, 92, 104, 0.4);
    --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.45);
    --shadow-md: 0 12px 30px rgba(0, 0, 0, 0.55);
}

/* Hide Scrollbars Globally */
::-webkit-scrollbar { display: none; }
* { box-sizing: border-box; margin: 0; padding: 0; -ms-overflow-style: none; scrollbar-width: none; }
body {
    background:
        radial-gradient(circle at 15% 0%, color-mix(in srgb, var(--accent) 20%, transparent), transparent 34%),
        radial-gradient(circle at 85% 5%, color-mix(in srgb, var(--accent-cool) 16%, transparent), transparent 38%),
        radial-gradient(circle at top right, color-mix(in srgb, var(--primary) 14%, var(--bg) 86%), var(--bg) 45%);
    color: var(--text);
    font-family: var(--font-main);
    line-height: 1.45;
    height: 100vh;
    width: 100vw;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

/* Navbar */
.navbar {
    height: 64px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 1.25rem;
    background-color: color-mix(in srgb, var(--surface) 90%, transparent);
    backdrop-filter: blur(16px);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}
.navbar .logo { font-size: 1.35rem; font-weight: 800; flex: 1; letter-spacing: 0.2px; }
.navbar .tedx { color: var(--primary); font-weight: 900; }
.nav-links { display: flex; gap: 0.55rem; align-items: center; justify-content: center; flex: 2; }
.nav-item {
    padding: 0.52rem 0.9rem;
    border: 1px solid color-mix(in srgb, var(--border) 65%, transparent);
    font-size: 0.88rem;
    font-weight: 700;
    border-radius: 999px;
    background: color-mix(in srgb, var(--surface) 70%, transparent);
    transition: background-color 0.2s ease, color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
    color: var(--text);
    letter-spacing: 0.2px;
}
.nav-item:hover { background-color: rgba(229, 9, 20, 0.1); color: var(--primary); transform: translateY(-1px); }
.nav-item.active { background: linear-gradient(135deg, var(--primary), #ff4a57); color: #ffffff; border-color: var(--primary); box-shadow: 0 8px 20px rgba(255, 31, 45, 0.36); }
.nav-actions { display: flex; gap: 0.65rem; align-items: center; justify-content: flex-end; flex: 1; }
.mobile-only { display: none; }

/* Buttons */
button {
    cursor: pointer;
    font-family: inherit;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.35px;
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--text);
    padding: 0.5rem 0.9rem;
    border-radius: 11px;
    transition: transform 0.2s ease, background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}
button:hover { transform: translateY(-1px); box-shadow: var(--shadow-sm); }
button:active { transform: translateY(0); }
.btn-outline:hover { background-color: color-mix(in srgb, var(--text) 92%, transparent); color: var(--surface); border-color: var(--text); }
.btn-primary { background-color: var(--primary); color: #ffffff; border-color: var(--primary); }
.btn-primary { background-image: linear-gradient(135deg, var(--primary), #ff4a57); }
.btn-primary:hover { background-image: linear-gradient(135deg, #ff4a57, var(--primary)); color: #ffffff; box-shadow: 0 8px 18px rgba(255, 31, 45, 0.32); }
[data-theme="dark"] .btn-primary:hover { background-image: linear-gradient(135deg, #ff5662, #d91323); }
button:focus-visible,
.nav-item:focus-visible,
input:focus-visible,
select:focus-visible {
    outline: 0;
    box-shadow: 0 0 0 3px var(--focus);
}

/* Layout Container */
.layout { display: flex; margin-top: 64px; height: calc(100vh - 64px); overflow: hidden; width: 100%; }

/* Content Area & General */
.content { flex: 1; padding: 1.5rem clamp(1rem, 2.8vw, 2.1rem); overflow-y: auto; height: 100%; width: 100%; }
.view { display: none; opacity: 0; transition: opacity 0.25s ease; }
.view.active { display: block; opacity: 1; }
h2, h3 { margin-bottom: 1rem; text-transform: uppercase; letter-spacing: 0.6px; }
h2 { font-size: clamp(1.25rem, 1.3rem + 0.9vw, 2rem); }
h3 { font-size: clamp(1rem, 0.95rem + 0.45vw, 1.3rem); }
.section-title { margin-top: 2rem; }
.hidden { display: none !important; opacity: 0; }
input, select {
    padding: 0.72rem;
    border: 1px solid var(--border);
    background: color-mix(in srgb, var(--surface) 92%, var(--bg) 8%);
    color: var(--text);
    outline: none;
    border-radius: 10px;
    font-family: inherit;
    transition: border-color 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}
input::placeholder { color: var(--muted); }
input:focus, select:focus { border-color: var(--primary); box-shadow: 0 0 0 3px var(--focus); }

/* Dashboard Components */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 1rem; width: 100%; }
.stat-card {
    border: 1px solid color-mix(in srgb, var(--primary) 20%, var(--border) 80%);
    background: var(--surface);
    padding: 1.25rem 1.2rem;
    text-align: center;
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.stat-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.stat-card h3 { color: var(--muted); font-size: 0.88rem; margin-bottom: 0.45rem; }
.stat-card p { font-size: clamp(1.9rem, 1.35rem + 1.4vw, 2.5rem); font-weight: 800; color: var(--primary); }
.stat-card:nth-child(1) p { color: var(--accent-cool); }
.stat-card:nth-child(2) p { color: var(--accent); }
.stat-card:nth-child(3) p { color: #36d975; }
.stat-card:nth-child(4) p { color: var(--primary); }
.seating-legend { display: flex; gap: 1rem; margin-bottom: 1rem; flex-wrap: wrap; }
.legend-item { display: flex; align-items: center; gap: 0.5rem; font-weight: 700; color: var(--muted); }
.box { width: 20px; height: 20px; border: 1px solid var(--border); border-radius: 6px; }
.box.empty { background-color: var(--bg); }
.box.reserved { background-color: var(--accent); border-color: var(--accent); }
.box.checked { background-color: #2ecf72; border-color: #2ecf72; }

.seating-grid { display: grid; grid-template-columns: repeat(19, 1fr); gap: 0.5rem; width: 100%; max-width: 1220px; margin: 0 auto; padding: 0.85rem; border: 1px solid var(--border); border-radius: var(--radius); background: color-mix(in srgb, var(--surface) 95%, var(--bg) 5%); box-shadow: var(--shadow-sm); }

/* Create the middle aisle between the two 9-column sections */
.seat:nth-child(18n + 10) {
    grid-column-start: 11;
}

.seat {
    aspect-ratio: 1;
    min-height: 34px;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    font-weight: 700;
    font-size: 0.84rem;
    cursor: pointer;
    border-radius: 9px;
    border: 1px solid var(--border);
    transition: transform 0.16s ease, box-shadow 0.2s ease, border-color 0.2s ease, filter 0.2s ease;
    z-index: 1;
}
.seat.empty { background-color: var(--bg); color: var(--text); }
.seat.reserved { background: linear-gradient(145deg, #ffd246, var(--accent)); color: #000; border-color: #e39f00; }
.seat.checked { background: linear-gradient(145deg, #32df7a, #1fb45f); color: #fff; border-color: #13924a; }
.seat.vip.empty { background-color: var(--primary); color: #fff; border-color: #b20710; box-shadow: inset 0 0 5px rgba(0,0,0,0.3); }
.seat.vip.reserved { background: linear-gradient(145deg, #ff9f1a, #ff7f11); color: #fff; border-color: #c56000; }
.seat.vip.checked { background: linear-gradient(145deg, #00dd70, #00b95d); color: #fff; border-color: #00944a; }

.seat:hover { transform: translateY(-2px) scale(1.05); box-shadow: 0 7px 16px rgba(0,0,0,0.2); z-index: 10; filter: saturate(1.05); }

/* Tooltip for seats */
.seat::before {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 115%;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--text);
    color: var(--surface);
    padding: 0.4rem 0.58rem;
    border-radius: 7px;
    font-size: 0.73rem;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s ease, visibility 0.2s ease;
    z-index: 20;
}
.seat:hover::before {
    opacity: 1;
    visibility: visible;
    transition-delay: 0.3s; /* Small delay before showing */
}

/* Scanner Component */
.scanner-container { display: flex; flex-direction: column; align-items: center; gap: 1.5rem; margin-top: 2rem; }
.qr-reader-box {
    width: 100%;
    max-width: 420px;
    overflow: hidden;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    background: var(--surface);
    box-shadow: var(--shadow-sm);
}
.scan-instructions {
    font-size: 1.05rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--muted);
}
/* Html5-Qrcode overrides */
#reader__dashboard_section_csr span { color: var(--text) !important; }
#reader button { cursor: pointer; font-family: inherit; font-weight: bold; border: 2px solid var(--border); background: var(--bg); color: var(--text); padding: 0.5rem 1rem; border-radius: 4px; margin: 5px; }
#reader button:hover { background-color: var(--text); color: var(--bg); }
#reader select { margin: 10px 0; padding: 0.5rem; }
#reader a { color: var(--primary); display: none; } /* hide the library link */
[data-theme="dark"] #reader img { filter: invert(1); }



.result-card {
    border: 1px solid var(--border);
    background: var(--surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    padding: 1.5rem;
    width: 100%;
    max-width: 400px;
    text-align: center;
    font-weight: 700;
    transition: box-shadow 0.2s ease;
}
.result-card.success {
    border-color: var(--primary);
    color: var(--primary);
    background: color-mix(in srgb, var(--primary) 8%, var(--surface) 92%);
}
.result-card.error {
    border-color: #e50914;
    color: #e50914;
    background: color-mix(in srgb, #e50914 7%, var(--surface) 93%);
}

/* Manual Entry */
.manual-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    margin-top: 2rem;
}
.manual-form {
    width: 100%;
    max-width: 400px;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}
.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    font-weight: bold;
}

/* Database Management Form */
.add-attendee-container { margin-bottom: 1.5rem; padding: 1rem; border: 1px solid var(--border); border-radius: var(--radius); background: color-mix(in srgb, var(--surface) 94%, var(--bg) 6%); }
.manage-form { display: flex; flex-wrap: wrap; gap: 0.8rem; align-items: center; width: 100%; }
.manage-form input, .manage-form select { flex: 1; min-width: 150px; }
.btn-icon { background: var(--surface); border: 1px solid var(--border); color: var(--text); display: flex; align-items: center; justify-content: center; padding: 0.45rem; cursor: pointer; transition: transform 0.2s, color 0.2s, border-color 0.2s; }
.btn-icon:hover { transform: translateY(-1px) scale(1.05); color: var(--primary); border-color: var(--primary); }
.delete-btn { border-color: #e50914; color: #e50914; padding: 0.3rem 0.6rem; font-size: 0.8rem; }
.delete-btn:hover { background-color: #e50914; color: #fff; box-shadow: 0 6px 16px rgba(229, 9, 20, 0.35); }
.edit-btn { border-color: #007bff; color: #007bff; padding: 0.3rem 0.6rem; font-size: 0.8rem; margin-inline-end: 0.5rem; }
.edit-btn:hover { background-color: #007bff; color: #fff; box-shadow: 0 6px 16px rgba(0, 123, 255, 0.35); }
.qr-btn { border-color: var(--text); color: var(--text); padding: 0.3rem 0.6rem; font-size: 0.8rem; margin-inline-end: 0.5rem; }
.qr-btn:hover { background-color: var(--text); color: var(--bg); }

/* QR Modal */
.qr-modal { position: fixed; inset: 0; background: rgba(0,0,0,0.8); z-index: 1000; display: flex; justify-content: center; align-items: center; opacity: 0; pointer-events: none; transition: opacity 0.3s; }
.qr-modal.active { opacity: 1; pointer-events: auto; }
.qr-modal-content { background: var(--surface); color: var(--text); padding: 2rem; border-radius: var(--radius); text-align: center; position: relative; border: 1px solid var(--border); min-width: 300px; box-shadow: var(--shadow-md); }
.close-modal { position: absolute; top: 10px; right: 15px; font-size: 2rem; cursor: pointer; color: var(--text); line-height: 1; }
.close-modal:hover { color: var(--primary); }
#db-qr-canvas { margin: 1.5rem auto; display: block; border: 10px solid #fff; border-radius: 4px; background: #fff; }

/* Status Badges */
.badge { display: inline-block; padding: 0.35rem 0.75rem; border-radius: 20px; font-size: 0.8rem; font-weight: bold; text-transform: uppercase; text-align: center; min-width: 100px; }
.badge.empty { background: transparent; color: var(--text); }
.badge.reserved { background: linear-gradient(135deg, #ffc107, #ffb300); color: #000; box-shadow: 0 2px 6px rgba(255,193,7,0.3); }
.badge.reserved { background: linear-gradient(135deg, #ffd047, #ffac00); color: #000; box-shadow: 0 4px 10px rgba(255, 183, 3, 0.35); }
.badge.checked { background: linear-gradient(135deg, #35d97b, #18b562); color: #fff; box-shadow: 0 4px 10px rgba(24, 181, 98, 0.33); }

/* Database Table */
.table-container {
    overflow-x: auto;
    overflow-y: auto;
    max-height: calc(100vh - 265px);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    width: 100%;
    background: var(--surface);
    box-shadow: var(--shadow-sm);
}
.data-table {
    width: 100%;
    border-collapse: collapse;
}
.data-table th, .data-table td {
    padding: 0.88rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}
.data-table th {
    background-color: color-mix(in srgb, var(--text) 90%, #000 10%);
    color: var(--surface);
    position: sticky;
    top: 0;
    z-index: 2;
    letter-spacing: 0.45px;
    box-shadow: 0 1px 0 color-mix(in srgb, var(--text) 15%, transparent);
}
.data-table tbody tr:nth-child(even) {
    background-color: color-mix(in srgb, var(--surface) 94%, var(--text) 6%);
}
.data-table tbody tr:hover {
    background: linear-gradient(90deg, color-mix(in srgb, var(--primary) 16%, transparent), color-mix(in srgb, var(--accent) 14%, transparent));
}

/* RTL Adjustments for Arabic */
[dir="rtl"] .data-table th, [dir="rtl"] .data-table td { text-align: right; }

/* Custom Toast Notifications */
.toast-container { position: fixed; bottom: 20px; right: 20px; display: flex; flex-direction: column; gap: 10px; z-index: 9999; }
.toast { min-width: 250px; padding: 0.95rem 1.1rem; border-radius: 11px; font-weight: 700; display: flex; align-items: center; justify-content: space-between; box-shadow: var(--shadow-md); transform: translateX(120%); transition: transform 0.3s ease, opacity 0.3s ease; opacity: 0; background: var(--surface); color: var(--text); border: 1px solid var(--border); border-left: 6px solid var(--border); }
.toast.show { transform: translateX(0); opacity: 1; }
.toast.error { border-left-color: #e50914; }
.toast.error { background: color-mix(in srgb, #e50914 10%, var(--surface) 90%); }
.toast.success { border-left-color: #28a745; background: color-mix(in srgb, #28a745 10%, var(--surface) 90%); }
.toast.warning { border-left-color: #ffc107; background: color-mix(in srgb, #ffc107 12%, var(--surface) 88%); }
.toast-close { cursor: pointer; font-size: 1.5rem; margin-left: 1rem; color: inherit; opacity: 0.5; line-height: 1; }
.toast-close:hover { opacity: 1; }

/* RTL for Toasts */
[dir="rtl"] .toast-container { right: auto; left: 20px; }
[dir="rtl"] .toast { transform: translateX(-120%); border-left: none; border-right: 6px solid var(--border); }
[dir="rtl"] .toast.show { transform: translateX(0); }
[dir="rtl"] .toast.error { border-right-color: #e50914; }
[dir="rtl"] .toast.success { border-right-color: #28a745; }
[dir="rtl"] .toast.warning { border-right-color: #ffc107; }
[dir="rtl"] .toast-close { margin-left: 0; margin-right: 1rem; }

/* Print QR View */
.print-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 1.5rem; justify-content: center; margin-top: 1rem; }
.print-card { border: 1px dashed var(--border); padding: 1.5rem; text-align: center; border-radius: var(--radius); background: var(--surface); box-shadow: var(--shadow-sm); }
.print-card h3 { margin-bottom: 0.5rem; font-size: 1.2rem; color: var(--text); }
.print-card p { font-size: 1rem; margin-bottom: 1rem; font-weight: bold; color: var(--text); opacity: 0.8; }
.print-card canvas { margin: 0 auto; display: block; border: 5px solid #fff; border-radius: 4px; box-shadow: 0 4px 6px rgba(0,0,0,0.1); }
.pagination-controls { display: flex; justify-content: center; gap: 0.5rem; margin-top: 2rem; flex-wrap: wrap; }
.page-btn { padding: 0.5rem 1rem; border: 2px solid var(--primary); background: var(--bg); color: var(--text); cursor: pointer; border-radius: 4px; font-weight: bold; }
.page-btn.active { background: var(--primary); color: #fff; }
.page-btn:hover { background: linear-gradient(135deg, var(--primary), #ff4a57); color: #fff; opacity: 0.95; }

@media print {
    body { height: auto; overflow: visible; background: #fff !important; color: #000 !important; }
    .navbar, .nav-actions, .pagination-controls, button, .layout, .add-attendee-container { display: none !important; }
    .layout { display: block; margin: 0; height: auto; overflow: visible; }
    .content { padding: 0; overflow: visible; height: auto; }
    #print-qrs { display: block !important; opacity: 1 !important; visibility: visible !important; }
    .view:not(#print-qrs) { display: none !important; }
    
    .print-grid { 
        display: grid; 
        grid-template-columns: repeat(2, 1fr); 
        gap: 20px; 
        margin: 0;
    }
    .print-card { 
        border: 2px solid #000; box-shadow: none; break-inside: avoid; page-break-inside: avoid; 
        height: 30vh; /* Takes exactly 1/3 of the page height -> 6 cards per page */
        display: flex; flex-direction: column; justify-content: center; align-items: center; padding: 10px; 
    }
    .print-card h4 { font-size: 1.3rem; margin-bottom: 0.2rem; }
    .print-card canvas { border: none; box-shadow: none; max-width: 130px; max-height: 130px; margin-top: 10px; }
    @page { size: A4 portrait; margin: 10mm; }
}

@media (prefers-reduced-motion: reduce) {
    * {
        animation: none !important;
        transition: none !important;
        scroll-behavior: auto !important;
    }
}