:root {
    --primary: #1976d2;
    --primary-light: #e3f2fd;
    --primary-dark: #1565c0;
    --background: #f8f9fa;
    --surface: #ffffff;
    --error: #d32f2f;
    --success: #2e7d32;
    --warning: #ed6c02;
    --text-primary: rgba(0, 0, 0, 0.87);
    --text-secondary: rgba(0, 0, 0, 0.6);
    --border-color: rgba(0, 0, 0, 0.12);
    --divider: rgba(0, 0, 0, 0.08);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Roboto', 'Outfit', sans-serif;
    background-color: var(--background);
    color: var(--text-primary);
    height: 100vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

/* Material Header App Bar */
.app-bar {
    height: 64px;
    background-color: var(--surface);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.5rem;
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0px 2px 4px -1px rgba(0,0,0,0.05);
    z-index: 100;
    flex-shrink: 0;
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-area svg {
    color: var(--primary);
}

.logo-area h1 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.2px;
}

.logo-area p {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-left: 0.5rem;
    border-left: 1px solid var(--border-color);
    padding-left: 0.5rem;
}

.status-badge {
    background: var(--primary-light);
    color: var(--primary-dark);
    border: 1px solid rgba(25, 118, 210, 0.2);
    border-radius: 50px;
    padding: 0.35rem 0.85rem;
    font-size: 0.8rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--success);
    box-shadow: 0 0 4px var(--success);
}

/* Main Layout Window */
.main-content {
    flex: 1;
    display: flex;
    overflow: hidden;
    padding: 1.5rem;
    gap: 1.5rem;
    background-color: #f8f9fa; /* Sleek light grey background */
}

/* Sidebars & Viewfinder */
.sidebar {
    width: 320px;
    background: transparent;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    overflow-y: auto;
    flex-shrink: 0;
}

.left-sidebar {
    /* No border or background */
}

.right-sidebar {
    width: 340px;
    /* No border or background */
}

.viewfinder-section {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}

.section-card {
    background: var(--surface);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
}

.section-card h2 {
    font-family: 'Outfit', sans-serif;
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
    letter-spacing: 0.1px;
    text-transform: uppercase;
    border-bottom: 1px solid var(--divider);
    padding-bottom: 0.5rem;
}

/* Video view container */
.video-container-card {
    background-color: var(--surface);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: 0px 3px 12px rgba(0,0,0,0.06);
    width: 100%;
    max-width: 800px;
    display: flex;
    flex-direction: column;
    padding: 1.25rem;
}

.video-wrapper-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: 'Outfit', sans-serif;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.live-pulse {
    color: var(--error);
    font-size: 0.8rem;
    font-weight: bold;
    display: flex;
    align-items: center;
    gap: 0.35rem;
    animation: blink 1.2s infinite alternate;
}

@keyframes blink {
    0% { opacity: 0.4; }
    100% { opacity: 1; }
}

.video-wrapper {
    position: relative !important;
    width: 100% !important;
    aspect-ratio: 4 / 3;
    max-height: 460px;
    background: #0b0f19;
    border-radius: 14px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    display: block !important;
    box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.25);
}

/* Mirror inversion (scaleX -1) and edge-to-edge cover formatting */
#webcam,
#webcamVideo,
#adminWebcam,
#testerWebcam,
#playgroundWebcam {
    position: absolute !important;
    top: 0 !important;
    left: 0 !important;
    width: 100% !important;
    height: 100% !important;
    object-fit: cover !important;
    transform: scaleX(-1) !important;
    -webkit-transform: scaleX(-1) !important;
    display: block !important;
    border-radius: 14px;
    z-index: 2;
}

#overlayCanvas,
#webcamCanvas,
#adminOverlayCanvas,
#testerOverlayCanvas,
#playgroundOverlayCanvas {
    position: absolute !important;
    top: 0 !important;
    left: 0 !important;
    width: 100% !important;
    height: 100% !important;
    object-fit: cover !important;
    transform: scaleX(-1) !important;
    -webkit-transform: scaleX(-1) !important;
    pointer-events: none !important;
    z-index: 4;
    border-radius: 12px;
}

.video-placeholder {
    text-align: center;
    color: var(--text-secondary);
    padding: 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
}

.laser-line {
    position: absolute;
    width: 100%;
    height: 2px;
    background: linear-gradient(to right, transparent, var(--primary), transparent);
    top: 0;
    left: 0;
    animation: scanning 3s linear infinite;
    pointer-events: none;
    display: none;
    box-shadow: 0 0 6px var(--primary);
    z-index: 5;
}

@keyframes scanning {
    0% { top: 0%; }
    50% { top: 100%; }
    100% { top: 0%; }
}

/* Buttons */
.btn-group, .action-bar {
    display: flex;
    gap: 0.75rem;
    justify-content: center;
}

.action-bar {
    margin-top: 1.25rem;
}

.btn {
    font-family: 'Roboto', sans-serif;
    font-size: 0.8rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 0.6rem 1.1rem;
    border-radius: 4px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: background-color 0.2s, box-shadow 0.2s, border-color 0.2s;
    border: none;
    outline: none;
}

.btn-contained {
    background-color: var(--primary);
    color: white;
    box-shadow: 0px 3px 1px -2px rgba(0,0,0,0.1), 0px 2px 2px 0px rgba(0,0,0,0.08), 0px 1px 5px 0px rgba(0,0,0,0.06);
}

.btn-contained:hover {
    background-color: var(--primary-dark);
    box-shadow: 0px 2px 4px -1px rgba(0,0,0,0.15), 0px 4px 5px 0px rgba(0,0,0,0.1), 0px 1px 10px 0px rgba(0,0,0,0.08);
}

.btn-outlined {
    background-color: transparent;
    border: 1px solid rgba(25, 118, 210, 0.4);
    color: var(--primary);
}

.btn-outlined:hover {
    background-color: rgba(25, 118, 210, 0.04);
    border-color: var(--primary);
}

.btn-danger-outlined {
    border-color: rgba(211, 47, 47, 0.4);
    color: var(--error);
}

.btn-danger-outlined:hover {
    background-color: rgba(211, 47, 47, 0.04);
    border-color: var(--error);
}

.btn-live-active {
    background-color: rgba(211, 47, 47, 0.08) !important;
    border-color: var(--error) !important;
    color: var(--error) !important;
}

.live-indicator-dot {
    width: 8px;
    height: 8px;
    background-color: var(--error);
    border-radius: 50%;
    animation: pulse 1.2s infinite;
}

@keyframes pulse {
    0% { transform: scale(0.85); opacity: 0.5; }
    50% { transform: scale(1.2); opacity: 1; }
    100% { transform: scale(0.85); opacity: 0.5; }
}

/* Inputs */
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
}

.input-field {
    display: flex;
    flex-direction: column;
    margin-bottom: 0.75rem;
}

.input-field label {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
}

.input-field input[type="text"] {
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 0.55rem 0.75rem;
    font-size: 0.9rem;
    color: var(--text-primary);
    background-color: #fafafa;
    transition: border-color 0.2s, background-color 0.2s;
}

.input-field input[type="text"]:focus {
    outline: none;
    border-color: var(--primary);
    background-color: var(--surface);
}

.file-input {
    font-size: 0.8rem;
    color: var(--text-secondary);
    padding: 0.25rem 0;
}

/* Results display inside right panel */
.results-box {
    margin-top: 0.25rem;
    display: none;
}

.results-header {
    font-family: 'Outfit', sans-serif;
    font-size: 1rem;
    font-weight: 700;
    text-align: center;
    padding: 0.5rem;
    border-radius: 4px;
    margin-bottom: 1rem;
    letter-spacing: 0.5px;
}

.res-profile-display {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    background-color: var(--background);
    border-radius: 6px;
    margin-bottom: 1rem;
}

.res-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background-color: var(--primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.1rem;
    font-family: 'Outfit', sans-serif;
}

.res-info {
    display: flex;
    flex-direction: column;
}

.res-name {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-primary);
}

.metric-block {
    margin-bottom: 0.75rem;
}

.metric-info {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
}

.metric-val {
    color: var(--text-primary);
    font-weight: 600;
}

.progress-bar {
    background-color: rgba(0,0,0,0.06);
    height: 5px;
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background-color: var(--primary);
    width: 0%;
    transition: width 0.3s ease, background-color 0.2s;
}

.feedback-box {
    margin-top: 1rem;
    padding: 0.75rem;
    background-color: rgba(25, 118, 210, 0.05);
    border-left: 4px solid var(--primary);
    border-radius: 4px;
}

.feedback-title {
    font-size: 0.75rem;
    font-weight: bold;
    color: var(--primary-dark);
    text-transform: uppercase;
    margin-bottom: 0.15rem;
}

.feedback-text {
    font-size: 0.8rem;
    color: var(--text-primary);
    line-height: 1.35;
}

/* Log Terminal Console (Light) */
.terminal-card {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 220px;
    max-height: 330px;
}

.terminal-view {
    background-color: #f5f5f7;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    flex: 1;
    overflow-y: auto;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    padding: 0.75rem;
    color: #374151;
}

.log-line {
    margin-bottom: 0.3rem;
    line-height: 1.35;
}

.log-time {
    color: var(--text-secondary);
}

.log-success {
    color: var(--success);
    font-weight: 500;
}

.log-fail {
    color: var(--error);
    font-weight: bold;
}

.log-info {
    color: var(--primary-dark);
}

/* Profiles scroll container */
.registry-card {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.faculty-list-container {
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding-right: 0.25rem;
}

.faculty-badge {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 0.75rem;
    background-color: #fafafa;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    transition: background-color 0.2s;
}

.faculty-badge:hover {
    background-color: var(--primary-light);
}

.faculty-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background-color: var(--primary-light);
    color: var(--primary-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 0.85rem;
    font-family: 'Outfit', sans-serif;
}

.faculty-details {
    display: flex;
    flex-direction: column;
}

.faculty-name {
    font-weight: 500;
    font-size: 0.85rem;
    color: var(--text-primary);
}

.faculty-id {
    font-size: 0.7rem;
    color: var(--text-secondary);
    font-family: 'JetBrains Mono', monospace;
}

.empty-list {
    text-align: center;
    color: var(--text-secondary);
    padding: 2rem 0;
    font-size: 0.85rem;
}

.capture-flash {
    animation: flashEffect 0.3s ease-out;
}

@keyframes flashEffect {
    0% { box-shadow: 0 0 0 9999px rgba(255,255,255,0.85); }
    100% { box-shadow: 0 0 0 0px rgba(255,255,255,0); }
}

.file-verify-container {
    margin: 0.75rem 0;
    padding: 0.5rem 0.75rem;
    background-color: #fafafa;
    border: 1px dashed var(--border-color);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
}

.file-verify-label {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.delete-profile-btn {
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.25rem;
    border-radius: 4px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s, color 0.2s;
}

.delete-profile-btn:hover {
    background-color: rgba(211, 47, 47, 0.08);
    color: var(--error);
}

/* Live Biometric Pipeline Stepper styling */
.pipeline-stepper {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--divider);
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.pipeline-stepper-title {
    font-family: 'Outfit', sans-serif;
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
    display: flex;
    justify-content: space-between;
}

.stepper-stage {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.8rem;
    position: relative;
}

.stepper-stage::before {
    content: '';
    position: absolute;
    left: 9px;
    top: 20px;
    bottom: -12px;
    width: 2px;
    background-color: var(--divider);
    z-index: 1;
}

.stepper-stage:last-child::before {
    display: none;
}

.stage-icon {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background-color: #e0e0e0;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.65rem;
    font-weight: bold;
    z-index: 2;
    transition: background-color 0.3s, color 0.3s;
}

.stage-icon.completed {
    background-color: var(--success);
    color: white;
}

.stage-icon.failed {
    background-color: var(--error);
    color: white;
}

.stage-icon.pending {
    background-color: var(--warning);
    color: white;
}

.stage-body {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.stage-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.stage-name {
    font-weight: 500;
    color: var(--text-primary);
}

.stage-time {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.stage-details {
    font-size: 0.7rem;
    color: var(--text-secondary);
    margin-top: 0.1rem;
    word-break: break-all;
}

.stage-fallback-badge {
    font-size: 0.65rem;
    padding: 0.05rem 0.25rem;
    border-radius: 4px;
    font-weight: 600;
    text-transform: uppercase;
    margin-left: 0.5rem;
}
.stage-fallback-badge.mock {
    background-color: #ffe0b2;
    color: #e65100;
}
.stage-fallback-badge.actual {
    background-color: #c8e6c9;
    color: #1b5e20;
}

/* Shared Attendance Table styling */
.attendance-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
    text-align: left;
}

.attendance-table th {
    color: var(--text-secondary);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.75rem;
    padding: 0.75rem 0.5rem;
    border-bottom: 1px solid var(--border-color);
}

.attendance-table td {
    padding: 0.75rem 0.5rem;
    border-bottom: 1px solid var(--divider);
    color: var(--text-primary);
    vertical-align: middle;
}

/* ══════════════════════════════════════════════════════════════
   MOBILE & TABLET RESPONSIVE SYSTEM (SLICK PHONE LAYOUT)
   ══════════════════════════════════════════════════════════════ */
@media (max-width: 768px) {
    body {
        height: auto !important;
        min-height: 100vh;
        overflow-y: auto !important;
        -webkit-overflow-scrolling: touch;
    }

    /* Slick Mobile App Bar */
    .app-bar {
        height: auto;
        min-height: 54px;
        padding: 0.5rem 0.85rem;
        gap: 0.5rem;
        box-shadow: 0 1px 3px rgba(0,0,0,0.05);
    }

    .logo-area {
        gap: 0.5rem;
        flex: 1;
        min-width: 0;
    }

    .logo-area svg {
        width: 22px;
        height: 22px;
        flex-shrink: 0;
    }

    .logo-area h1 {
        font-size: 0.92rem;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        letter-spacing: -0.2px;
    }

    .logo-area p {
        display: none !important; /* Hide subtitle on phones to prevent wrapping */
    }

    .app-bar .btn, .app-bar button {
        padding: 0.4rem 0.75rem;
        font-size: 0.75rem;
        flex-shrink: 0;
        border-radius: 6px;
    }

    /* Main Container & Stacking */
    .main-content {
        flex-direction: column;
        height: auto;
        overflow: visible;
        padding: 0.85rem 0.65rem;
        gap: 1rem;
    }

    .sidebar {
        width: 100% !important;
        overflow: visible;
    }

    .viewfinder-section {
        width: 100%;
        overflow: visible;
    }

    /* Video Terminal adjustments */
    .video-container-card {
        padding: 0.85rem;
        border-radius: 12px;
    }

    .video-wrapper {
        height: 250px !important;
        min-height: 200px;
        border-radius: 8px;
    }

    .video-wrapper-header {
        font-size: 0.85rem;
        margin-bottom: 0.5rem;
    }

    /* Card Paddings */
    .section-card {
        padding: 1rem 0.85rem;
        border-radius: 10px;
    }

    /* Touch-friendly Action Buttons */
    .btn {
        min-height: 40px;
        font-size: 0.85rem;
        touch-action: manipulation;
    }
}