/* =============================================================================
   DESIGN SYSTEM & STYLESHEET (DARK MODE & MOBILE FRIENDLY)
   Aplikasi Web Eye-Tracking Label Gizi (Gen Z Research)
   ============================================================================= */

:root {
    /* Color Palette */
    --primary-color: #3b82f6;
    --primary-hover: #2563eb;
    --secondary-color: #64748b;
    --secondary-hover: #475569;
    --accent-color: #8b5cf6;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;

    /* Dark Mode & Background Tokens */
    --bg-main: #0f172a;
    --bg-card: #1e293b;
    --bg-card-hover: #334155;
    --border-color: #334155;

    /* Typography Tokens */
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

    /* Shadows & Border Radius */
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 24px;
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px -2px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 12px 28px -4px rgba(0, 0, 0, 0.6);
}

/* Reset & Base Styles */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-main);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

/* Helper Background Classes */
.bg-main { background-color: var(--bg-main); }
.bg-dark { background-color: #090d16; }
.bg-black { background-color: #000000; }

/* Layout Utilities */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.container-narrow {
    max-width: 800px;
}

.flex-center {
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.flex-gap {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.grid {
    display: grid;
    gap: 1.5rem;
}

.grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

.py-4 { padding-top: 2rem; padding-bottom: 2rem; }
.py-5 { padding-top: 3rem; padding-bottom: 3rem; }
.my-3 { margin-top: 1rem; margin-bottom: 1rem; }
.mb-4 { margin-bottom: 1.5rem; }
.mt-4 { margin-top: 1.5rem; }
.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }
.text-uppercase { text-transform: uppercase; }
.hidden { display: none !important; }

/* Typography */
.title-primary {
    font-size: 2.25rem;
    font-weight: 800;
    letter-spacing: -0.025em;
    background: linear-gradient(135deg, #60a5fa 0%, #a78bfa 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.5rem;
}

.subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
}

h1, h2, h3, h4, h5, h6 {
    color: var(--text-primary);
    font-weight: 700;
}

h2 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

/* Card Components */
.card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.75rem;
    box-shadow: var(--shadow-md);
    transition: border-color 0.2s ease, transform 0.2s ease;
}

.card-login {
    width: 100%;
    max-width: 440px;
}

.card-stat {
    background: linear-gradient(145deg, #1e293b 0%, #0f172a 100%);
    border: 1px solid var(--border-color);
}

.stat-number {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary-color);
    margin-top: 0.5rem;
}

.card-modal {
    width: 90%;
    max-width: 600px;
    margin: 2rem auto;
}

/* Badges */
.badge {
    display: inline-block;
    padding: 4px 10px;
    font-size: 0.82rem;
    font-weight: 600;
    border-radius: 12px;
}
.badge-info { background-color: rgba(59, 130, 246, 0.2); color: #93c5fd; border: 1px solid rgba(59, 130, 246, 0.3); }
.badge-success { background-color: rgba(16, 185, 129, 0.2); color: #6ee7b7; border: 1px solid rgba(16, 185, 129, 0.3); }
.badge-warning { background-color: rgba(245, 158, 11, 0.2); color: #fde047; border: 1px solid rgba(245, 158, 11, 0.3); }
.badge-danger { background-color: rgba(239, 68, 68, 0.2); color: #fca5a5; border: 1px solid rgba(239, 68, 68, 0.3); }
.badge-secondary { background-color: rgba(100, 116, 139, 0.2); color: #cbd5e1; border: 1px solid rgba(100, 116, 139, 0.3); }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    border: none;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.2s ease;
}

.btn-primary {
    background-color: var(--primary-color);
    color: #ffffff;
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    box-shadow: 0 0 15px rgba(59, 130, 246, 0.4);
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: #ffffff;
}

.btn-secondary:hover {
    background-color: var(--secondary-hover);
}

.btn-success {
    background-color: var(--success-color);
    color: #ffffff;
}

.btn-success:hover {
    background-color: #059669;
}

.btn-danger {
    background-color: var(--danger-color);
    color: #ffffff;
}

.btn-danger:hover {
    background-color: #dc2626;
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.btn-outline:hover {
    background-color: var(--bg-card-hover);
    color: #ffffff;
}

.btn-full {
    width: 100%;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

.btn-sm {
    padding: 0.4rem 0.9rem;
    font-size: 0.88rem;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Form Controls */
.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-label {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.form-input, .form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    background-color: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 1rem;
    outline: none;
    transition: border-color 0.2s ease;
}

.form-input:focus, .form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

.form-check {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
}

.checkbox-input {
    width: 1.25rem;
    height: 1.25rem;
    margin-top: 0.2rem;
    accent-color: var(--primary-color);
    cursor: pointer;
}

.checkbox-label {
    font-size: 0.95rem;
    color: var(--text-secondary);
    cursor: pointer;
}

/* Alerts */
.alert {
    padding: 1rem 1.25rem;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    border-left: 4px solid;
}

.alert-info {
    background-color: rgba(59, 130, 246, 0.1);
    border-color: var(--primary-color);
    color: #93c5fd;
}

.alert-warning {
    background-color: rgba(245, 158, 11, 0.1);
    border-color: var(--warning-color);
    color: #fde68a;
}

.alert-danger {
    background-color: rgba(239, 68, 68, 0.15);
    border-color: var(--danger-color);
    color: #fca5a5;
}

.alert-success {
    background-color: rgba(16, 185, 129, 0.15);
    border-color: var(--success-color);
    color: #6ee7b7;
}

.warning-float {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1000;
    box-shadow: var(--shadow-lg);
}

/* Navbar */
.navbar {
    background-color: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
}

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

.logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

/* Virtual Chinrest Box */
.card-reference-container {
    display: flex;
    justify-content: center;
    padding: 2rem 0;
}

.card-reference-box {
    width: 340px;
    height: 214px;
    background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    font-weight: bold;
    box-shadow: var(--shadow-lg);
}

.slider-input {
    width: 100%;
    accent-color: var(--primary-color);
}

/* Progress Bar */
.progress-bar-container {
    width: 100%;
    height: 8px;
    background-color: var(--border-color);
    border-radius: 4px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    transition: width 0.3s ease;
}

/* Fullscreen Stage */
.fullscreen-container, .fullscreen-stage {
    width: 100vw;
    height: 100vh;
    overflow: hidden;
    position: relative;
}

.neutral-screen {
    width: 100%;
    height: 100%;
    background-color: #808080; /* Netral 50% gray */
}

.fixation-cross {
    font-size: 5rem;
    color: #000000;
    font-weight: bold;
}

.stimulus-container {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.stimulus-img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

/* Table Styles */
table {
    width: 100%;
    border-collapse: collapse;
    color: var(--text-primary);
}

th {
    color: var(--text-secondary);
    font-weight: 700;
}

td {
    color: var(--text-primary);
}

/* =============================================================================
   MOBILE FRIENDLY RESPONSIVE STYLES
   ============================================================================= */

@media (max-width: 992px) {
    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
    .grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 1rem;
    }
    
    .py-4 { padding-top: 1.25rem; padding-bottom: 1.25rem; }
    .py-5 { padding-top: 1.75rem; padding-bottom: 1.75rem; }

    .grid, .grid-2, .grid-3, .grid-4 {
        grid-template-columns: 1fr !important;
        gap: 1rem !important;
    }

    .navbar-content {
        flex-direction: column;
        gap: 0.75rem;
        text-align: center;
    }

    .navbar-content .flex-gap {
        width: 100%;
        justify-content: center;
    }

    .title-primary {
        font-size: 1.55rem !important;
        line-height: 1.3 !important;
    }

    .subtitle {
        font-size: 0.95rem !important;
    }

    .btn {
        width: 100%;
        padding: 0.85rem 1rem;
        font-size: 0.95rem;
    }

    .btn-lg {
        padding: 0.9rem 1.25rem;
        font-size: 1rem;
    }

    .flex-center, .flex-between, .flex-gap {
        flex-direction: column;
        align-items: stretch;
        gap: 0.75rem;
    }

    .card {
        padding: 1.25rem !important;
    }

    .card-reference-box {
        width: 100%;
        max-width: 300px;
        height: 180px;
    }

    /* Prevent mobile browser auto-zoom on input focus */
    .form-input, .form-control, input, select, textarea {
        font-size: 16px !important;
    }

    /* Table horizontal scrolling container */
    div[style*="overflow-x:auto"] {
        border-radius: var(--radius-sm);
        border: 1px solid var(--border-color);
    }

    table {
        font-size: 0.8rem !important;
    }

    th, td {
        padding: 0.5rem 0.6rem !important;
    }
}