/* ========================================================
   FaceMark - Design System & Modern Responsive Stylesheet
   Deep Blue + Cyan/Teal Palette | Glassmorphism | Dark/Light Mode
   ======================================================== */

:root {
    --bg-main: #070b14;
    --bg-card: rgba(17, 24, 39, 0.85);
    --bg-card-hover: rgba(31, 41, 55, 0.9);
    --bg-input: #111827;
    --border-color: rgba(55, 65, 81, 0.7);
    --border-highlight: rgba(14, 165, 233, 0.4);
    
    --primary: #0ea5e9;
    --primary-gradient: linear-gradient(135deg, #0284c7 0%, #0d9488 100%);
    --primary-glow: rgba(14, 165, 233, 0.35);
    --teal: #14b8a6;
    --teal-glow: rgba(20, 184, 166, 0.35);
    
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    --success: #10b981;
    --success-bg: rgba(16, 185, 129, 0.15);
    --danger: #ef4444;
    --danger-bg: rgba(239, 68, 68, 0.15);
    --warning: #f59e0b;
    --warning-bg: rgba(245, 158, 11, 0.15);
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.6);
    --shadow-glow: 0 0 25px var(--primary-glow);
    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="light"] {
    --bg-main: #f0f4f8;
    --bg-card: rgba(255, 255, 255, 0.95);
    --bg-card-hover: #ffffff;
    --bg-input: #f8fafc;
    --border-color: #cbd5e1;
    --border-highlight: rgba(14, 165, 233, 0.5);
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #64748b;
    --shadow-card: 0 10px 25px -5px rgba(0, 0, 0, 0.08);
}

/* Reset & Base */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

body {
    background-color: var(--bg-main);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    line-height: 1.5;
    background-image: radial-gradient(circle at 15% 15%, rgba(14, 165, 233, 0.08) 0%, transparent 40%),
                      radial-gradient(circle at 85% 85%, rgba(20, 184, 166, 0.06) 0%, transparent 40%);
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: var(--transition);
}
a:hover {
    color: #38bdf8;
}

/* Navigation Bar */
.navbar {
    height: 70px;
    border-bottom: 1px solid var(--border-color);
    background: rgba(7, 11, 20, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    position: sticky;
    top: 0;
    z-index: 100;
}
[data-theme="light"] .navbar {
    background: rgba(255, 255, 255, 0.85);
}

.nav-container {
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
}
.brand-icon {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    background: var(--primary-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 15px var(--primary-glow);
}
.brand-icon svg {
    width: 22px;
    height: 22px;
    fill: #ffffff;
}
.brand-title {
    font-size: 20px;
    font-weight: 800;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, #38bdf8 0%, #2dd4bf 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.brand-sub {
    font-size: 11px;
    color: var(--text-secondary);
    display: block;
    margin-top: -3px;
    font-weight: 500;
    letter-spacing: 0.3px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 20px;
}
.nav-link {
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 600;
    padding: 8px 14px;
    border-radius: var(--radius-sm);
}
.nav-link:hover, .nav-link.active {
    color: #fff;
    background: rgba(255, 255, 255, 0.05);
}
[data-theme="light"] .nav-link:hover, [data-theme="light"] .nav-link.active {
    color: var(--primary);
    background: rgba(0, 0, 0, 0.04);
}

.theme-toggle-btn {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 8px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}
.theme-toggle-btn:hover {
    color: var(--text-primary);
    border-color: var(--primary);
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 24px;
    flex: 1;
    width: 100%;
}

/* Glass Card */
.glass-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 32px;
    box-shadow: var(--shadow-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 22px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
}
.btn-primary {
    background: var(--primary-gradient);
    color: #ffffff;
    box-shadow: 0 4px 15px rgba(2, 132, 199, 0.35);
}
.btn-primary:hover {
    box-shadow: 0 6px 22px rgba(2, 132, 199, 0.55);
    transform: translateY(-1px);
}
.btn-teal {
    background: linear-gradient(135deg, #0d9488, #059669);
    color: #ffffff;
    box-shadow: 0 4px 15px rgba(13, 148, 136, 0.35);
}
.btn-teal:hover {
    box-shadow: 0 6px 22px rgba(13, 148, 136, 0.55);
    transform: translateY(-1px);
}
.btn-outline {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}
.btn-outline:hover {
    border-color: var(--primary);
    background: rgba(14, 165, 233, 0.08);
}
.btn-danger {
    background: var(--danger);
    color: #fff;
}
.btn-sm {
    padding: 8px 14px;
    font-size: 13px;
}
.btn-lg {
    padding: 16px 28px;
    font-size: 16px;
    border-radius: var(--radius-md);
}

/* Forms */
.form-group {
    margin-bottom: 20px;
}
.form-label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 6px;
}
.form-label .required {
    color: var(--danger);
}
.form-control {
    width: 100%;
    padding: 12px 14px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 14px;
    outline: none;
    transition: var(--transition);
}
.form-control:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
}
.form-hint {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 4px;
}

/* Checkbox */
.custom-checkbox {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    cursor: pointer;
    font-size: 13px;
    color: var(--text-secondary);
    user-select: none;
}
.custom-checkbox input[type="checkbox"] {
    margin-top: 3px;
    width: 18px;
    height: 18px;
    accent-color: var(--teal);
    cursor: pointer;
}

/* Step Wizard */
.wizard-steps {
    display: flex;
    justify-content: space-between;
    margin-bottom: 30px;
    position: relative;
}
.wizard-steps::before {
    content: '';
    position: absolute;
    top: 20px;
    left: 40px;
    right: 40px;
    height: 2px;
    background: var(--border-color);
    z-index: 1;
}
.step-item {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}
.step-bubble {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: var(--bg-input);
    border: 2px solid var(--border-color);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 15px;
    transition: var(--transition);
}
.step-item.active .step-bubble {
    background: var(--primary);
    border-color: #38bdf8;
    color: #fff;
    box-shadow: 0 0 15px var(--primary-glow);
}
.step-item.completed .step-bubble {
    background: var(--teal);
    border-color: #2dd4bf;
    color: #fff;
}
.step-title {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted);
}
.step-item.active .step-title {
    color: var(--text-primary);
}

/* Camera & Scanner Viewport */
.camera-wrapper {
    position: relative;
    width: 100%;
    max-width: 520px;
    margin: 0 auto;
    aspect-ratio: 4/3;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: #000;
    border: 2px solid var(--border-color);
    box-shadow: var(--shadow-card);
}
.camera-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transform: scaleX(-1); /* mirror */
}
.camera-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    transform: scaleX(-1);
}

/* Scanner Overlay */
.scanner-overlay {
    position: absolute;
    inset: 0;
    pointer-events: none;
    display: flex;
    align-items: center;
    justify-content: center;
}
.guide-oval {
    width: 220px;
    height: 290px;
    border: 2px dashed rgba(56, 189, 248, 0.7);
    border-radius: 50%;
    position: relative;
    transition: border-color 0.3s;
}
.guide-oval.valid {
    border: 2.5px solid var(--teal);
    box-shadow: 0 0 25px rgba(20, 184, 166, 0.4);
}
.guide-oval.invalid {
    border: 2.5px solid var(--danger);
    box-shadow: 0 0 25px rgba(239, 68, 68, 0.4);
}

/* Laser Scanning Line Animation */
.scan-line {
    position: absolute;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, transparent 0%, #38bdf8 50%, transparent 100%);
    box-shadow: 0 0 15px #38bdf8;
    top: 20%;
    animation: scanAnim 2.4s ease-in-out infinite alternate;
}
@keyframes scanAnim {
    0% { top: 15%; opacity: 0.3; }
    50% { opacity: 1; }
    100% { top: 85%; opacity: 0.3; }
}

/* Corner Brackets for HUD */
.corner-bracket {
    position: absolute;
    width: 28px;
    height: 28px;
    border-color: #38bdf8;
    border-style: solid;
    pointer-events: none;
}
.corner-tl { top: 20px; left: 20px; border-width: 3px 0 0 3px; border-top-left-radius: 8px; }
.corner-tr { top: 20px; right: 20px; border-width: 3px 3px 0 0; border-top-right-radius: 8px; }
.corner-bl { bottom: 20px; left: 20px; border-width: 0 0 3px 3px; border-bottom-left-radius: 8px; }
.corner-br { bottom: 20px; right: 20px; border-width: 0 3px 3px 0; border-bottom-right-radius: 8px; }

/* Status Chip */
.status-chip {
    position: absolute;
    bottom: 16px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(15, 23, 42, 0.88);
    backdrop-filter: blur(8px);
    padding: 8px 18px;
    border-radius: 9999px;
    border: 1px solid var(--border-color);
    font-size: 13px;
    font-weight: 600;
    color: #e2e8f0;
    display: flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
    z-index: 10;
}
.pulse-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--primary);
    box-shadow: 0 0 8px var(--primary);
    animation: pulse 1.5s infinite;
}
@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.4; transform: scale(0.8); }
}

/* Circular Progress Ring */
.progress-ring-circle {
    transition: stroke-dashoffset 0.35s;
    transform: rotate(-90deg);
    transform-origin: 50% 50%;
}

/* Sample Thumbnails Bar */
.sample-bar {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-top: 20px;
}
.sample-slot {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-sm);
    background: var(--bg-input);
    border: 2px dashed var(--border-color);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    color: var(--text-muted);
    position: relative;
    overflow: hidden;
}
.sample-slot.captured {
    border: 2px solid var(--teal);
}
.sample-slot img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Toasts */
#toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 999999;
    display: flex;
    flex-direction: column;
    gap: 10px;
    max-width: 380px;
}
.toast {
    background: rgba(17, 24, 39, 0.95);
    border: 1px solid var(--border-color);
    backdrop-filter: blur(12px);
    border-radius: var(--radius-md);
    padding: 14px 18px;
    color: #fff;
    box-shadow: var(--shadow-card);
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
    animation: slideInRight 0.3s ease-out;
}
.toast-success { border-left: 4px solid var(--success); }
.toast-error { border-left: 4px solid var(--danger); }
.toast-warning { border-left: 4px solid var(--warning); }
.toast-info { border-left: 4px solid var(--primary); }

@keyframes slideInRight {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* Modals */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(6px);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
}
.modal-overlay.open {
    opacity: 1;
    pointer-events: auto;
}
.modal-box {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 540px;
    padding: 28px;
    box-shadow: var(--shadow-card);
    transform: translateY(20px);
    transition: transform 0.2s ease;
}
.modal-overlay.open .modal-box {
    transform: translateY(0);
}
.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}
.modal-title {
    font-size: 18px;
    font-weight: 700;
}
.modal-close {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 20px;
    cursor: pointer;
}
.modal-close:hover {
    color: #fff;
}

/* Footer */
.footer {
    border-top: 1px solid var(--border-color);
    padding: 24px;
    text-align: center;
    font-size: 13px;
    color: var(--text-muted);
    margin-top: auto;
    background: rgba(7, 11, 20, 0.5);
}

/* Mobile-First Comprehensive Responsive Styles */
@media (max-width: 768px) {
    .container { padding: 16px 12px; }
    .glass-card { padding: 18px 14px; border-radius: var(--radius-md); }
    .wizard-steps { margin-bottom: 20px; }
    .step-title { display: none; }
    .step-bubble { width: 34px; height: 34px; font-size: 13px; }
    
    /* Touch friendly form inputs: 16px prevents iOS Safari auto-zoom */
    .form-control {
        font-size: 16px !important;
        padding: 14px;
        min-height: 48px;
    }
    .btn {
        min-height: 48px;
        font-size: 15px;
        padding: 14px 20px;
    }

    /* Stack form grids vertically on phone */
    div[style*="grid-template-columns: 1fr 1fr"] {
        grid-template-columns: 1fr !important;
        gap: 0 !important;
    }

    .camera-wrapper {
        max-width: 100%;
        border-radius: var(--radius-md);
    }
    .guide-oval {
        width: 180px;
        height: 240px;
    }

    /* Sample thumbnail slots wrap on small screens */
    .sample-bar {
        gap: 8px;
    }
    .sample-slot {
        width: 52px;
        height: 52px;
    }

    /* Brand in navbar */
    .brand-title { font-size: 18px; }
    .brand-sub { font-size: 10px; }
    .nav-links .nav-link { display: none; }
    .nav-links { gap: 10px; }
}