:root {
    --bg-primary: #121212;
    --bg-secondary: #1e1e24;
    --bg-card: #252630;
    --text-primary: #e0e0e0;
    --text-secondary: #a0a0a0;
    --accent-blue: #00e5ff;
    --accent-purple: #b300ff;
    --error: #ff4d4d;
    --success: #00e676;
    --warning: #ffb300;
    --border: #333340;
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --transition: all 0.25s ease;
    --header-height: 70px;
}

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-tap-highlight-color: transparent;
}

table {
    border-collapse: separate;
    border-spacing: 0;
    width: 100%;
}

th, td {
    padding: 0.85rem 1rem;
    text-align: left;
}


html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    color: #ffffff;
    margin-bottom: 1rem;
    font-weight: 700;
    line-height: 1.3;
}

a {
    color: var(--accent-blue);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--accent-purple);
    text-shadow: 0 0 8px rgba(179, 0, 255, 0.4);
}

.container {
    width: 92%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 0;
    flex: 1;
}

/* Header & Mobile Navigation */
header {
    background-color: var(--bg-secondary);
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.35);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0;
}

.logo-container {
    display: flex;
    align-items: center;
}

.logo-link {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-container img {
    height: 38px;
    width: auto;
    border-radius: 8px;
    object-fit: cover;
}

.logo-text {
    font-size: 1.45rem;
    font-weight: 700;
    background: linear-gradient(90deg, var(--accent-blue), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.5px;
}

/* Mobile Nav Hamburger Button */
.mobile-nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-around;
    width: 44px;
    height: 44px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border);
    border-radius: 8px;
    cursor: pointer;
    padding: 10px 9px;
    z-index: 110;
    transition: var(--transition);
}

.mobile-nav-toggle:hover,
.mobile-nav-toggle:focus-visible {
    background: rgba(255, 255, 255, 0.1);
    outline: none;
    border-color: var(--accent-blue);
}

.hamburger-bar {
    width: 100%;
    height: 2px;
    background-color: var(--text-primary);
    border-radius: 2px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    transform-origin: center;
}

/* Hamburger active animation into an 'X' */
.mobile-nav-toggle.is-active .hamburger-bar:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
    background-color: var(--accent-blue);
}

.mobile-nav-toggle.is-active .hamburger-bar:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

.mobile-nav-toggle.is-active .hamburger-bar:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
    background-color: var(--accent-blue);
}

/* Desktop Navigation Default */
.nav-menu ul {
    list-style: none;
    display: flex;
    align-items: center;
    gap: 20px;
}

.nav-link {
    font-weight: 500;
    color: var(--text-primary);
    padding: 0.4rem 0.6rem;
    border-radius: 6px;
    display: inline-block;
}

.nav-link:hover {
    color: var(--accent-blue);
}

.nav-btn {
    padding: 0.5rem 1.1rem;
    font-size: 0.95rem;
}

/* Forms & Cards */
.card {
    background-color: var(--bg-card);
    border-radius: 14px;
    padding: 2rem;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
    border: 1px solid var(--border);
    margin-bottom: 2rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

input[type="text"],
input[type="email"],
input[type="password"] {
    width: 100%;
    min-height: 46px;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    border: 1px solid var(--border);
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 16px; /* Prevents auto-zoom on iOS */
    transition: var(--transition);
}

input:focus {
    outline: none;
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 2px rgba(0, 229, 255, 0.2);
}

/* Touch-Optimized Range Sliders */
.slider-group {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.04);
    border-radius: 12px;
    padding: 1rem 1.1rem;
    margin-bottom: 1.25rem;
    transition: var(--transition);
}

.slider-group:hover,
.slider-group:focus-within {
    background: rgba(255, 255, 255, 0.04);
    border-color: rgba(0, 229, 255, 0.2);
}

.slider-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
}

.slider-header label {
    margin-bottom: 0;
    font-weight: 600;
    color: var(--text-primary);
    font-size: 1rem;
}

.slider-container {
    display: flex;
    align-items: center;
    gap: 15px;
}

input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 36px;
    background: transparent;
    cursor: pointer;
    touch-action: pan-y;
}

/* Chrome / Safari / Edge Range Track */
input[type="range"]::-webkit-slider-runnable-track {
    width: 100%;
    height: 8px;
    cursor: pointer;
    background: #1f202b;
    border-radius: 6px;
    border: 1px solid var(--border);
}

/* Chrome / Safari / Edge Range Thumb */
input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    height: 26px;
    width: 26px;
    border-radius: 50%;
    background: var(--accent-blue);
    cursor: grab;
    margin-top: -9px;
    box-shadow: 0 0 10px rgba(0, 229, 255, 0.7);
    border: 2px solid #ffffff;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

input[type="range"]:active::-webkit-slider-thumb {
    cursor: grabbing;
    transform: scale(1.18);
    box-shadow: 0 0 16px var(--accent-blue);
}

/* Firefox Range Track & Thumb */
input[type="range"]::-moz-range-track {
    width: 100%;
    height: 8px;
    cursor: pointer;
    background: #1f202b;
    border-radius: 6px;
    border: 1px solid var(--border);
}

input[type="range"]::-moz-range-thumb {
    height: 26px;
    width: 26px;
    border-radius: 50%;
    background: var(--accent-blue);
    cursor: grab;
    box-shadow: 0 0 10px rgba(0, 229, 255, 0.7);
    border: 2px solid #ffffff;
    transition: transform 0.15s ease;
}

input[type="range"]:active::-moz-range-thumb {
    cursor: grabbing;
    transform: scale(1.18);
    box-shadow: 0 0 16px var(--accent-blue);
}

/* Dynamic Value Badge */
.slider-val {
    font-weight: 700;
    min-width: 40px;
    height: 32px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    font-size: 0.95rem;
    transition: var(--transition);
    background: rgba(0, 229, 255, 0.12);
    color: var(--accent-blue);
    border: 1px solid rgba(0, 229, 255, 0.3);
}

.slider-val.val-mild {
    background: rgba(0, 230, 118, 0.15);
    color: var(--success);
    border-color: rgba(0, 230, 118, 0.35);
}

.slider-val.val-mod {
    background: rgba(255, 179, 0, 0.15);
    color: var(--warning);
    border-color: rgba(255, 179, 0, 0.35);
}

.slider-val.val-severe {
    background: rgba(255, 77, 77, 0.18);
    color: var(--error);
    border-color: rgba(255, 77, 77, 0.4);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    border: none;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    touch-action: manipulation;
    user-select: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    color: #fff;
}

.btn-primary:hover,
.btn-primary:focus-visible {
    box-shadow: 0 0 16px rgba(179, 0, 255, 0.5);
    transform: translateY(-2px);
    color: #fff;
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--accent-blue);
    color: var(--accent-blue);
}

.btn-outline:hover,
.btn-outline:focus-visible {
    background: rgba(0, 229, 255, 0.12);
    color: #fff;
    border-color: var(--accent-purple);
}

.btn-block {
    width: 100%;
}

/* Alerts */
.alert {
    padding: 1rem 1.25rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
    line-height: 1.5;
}

.alert-error {
    background-color: rgba(255, 77, 77, 0.12);
    border: 1px solid var(--error);
    color: var(--error);
}

.alert-success {
    background-color: rgba(0, 230, 118, 0.12);
    border: 1px solid var(--success);
    color: var(--success);
}

/* Predictions Box */
.prediction-box {
    background: linear-gradient(180deg, rgba(37,38,48,1) 0%, rgba(30,30,36,1) 100%);
    border-top: 4px solid var(--accent-purple);
    padding: 1.75rem;
    border-radius: 12px;
    margin-bottom: 2rem;
    box-shadow: 0 10px 24px rgba(0, 0, 0, 0.45);
    border-left: 1px solid var(--border);
    border-right: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.prediction-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.prediction-header h3 {
    margin: 0;
    font-size: 1.25rem;
    color: var(--accent-blue);
}

.prediction-text {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--text-primary);
}

/* Responsive Grid */
.grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

@media (min-width: 768px) {
    .grid {
        grid-template-columns: 1fr 1fr;
    }
}

/* Report & Analytics Styles */
.report-header-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 12px;
}

.report-header-bar h2 {
    margin: 0;
}

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
    gap: 16px;
    margin-bottom: 2rem;
}

.metric-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.25rem 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 6px;
    transition: var(--transition);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

.metric-card:hover {
    border-color: rgba(0, 229, 255, 0.3);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}

.metric-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.75px;
}

.metric-value {
    font-size: 1.85rem;
    font-weight: 700;
    color: #ffffff;
    line-height: 1.2;
    display: flex;
    align-items: baseline;
    gap: 6px;
}

.metric-sub {
    font-size: 0.82rem;
    color: var(--text-secondary);
}

/* Report Table Header & Legend */
.table-card {
    padding: 0;
    overflow: hidden;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 14px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
    margin-bottom: 2rem;
}

.table-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 1.5rem;
    background: rgba(30, 30, 36, 0.85);
    border-bottom: 1px solid var(--border);
    flex-wrap: wrap;
    gap: 12px;
}

.table-card-header h3 {
    margin: 0;
    font-size: 1.15rem;
    color: var(--accent-blue);
}

.report-legend {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    font-size: 0.8rem;
}

.legend-badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-weight: 600;
    padding: 3px 9px;
    border-radius: 6px;
}

.legend-mild {
    background: rgba(0, 230, 118, 0.12);
    color: var(--success);
    border: 1px solid rgba(0, 230, 118, 0.3);
}

.legend-mod {
    background: rgba(255, 179, 0, 0.12);
    color: var(--warning);
    border: 1px solid rgba(255, 179, 0, 0.3);
}

.legend-severe {
    background: rgba(255, 77, 77, 0.12);
    color: var(--error);
    border: 1px solid rgba(255, 77, 77, 0.35);
}

/* Responsive Table */
.table-responsive-wrapper {
    position: relative;
    width: 100%;
}

.table-responsive {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    width: 100%;
}

.data-table {
    width: 100%;
    min-width: 820px;
    border-collapse: separate;
    border-spacing: 0;
    background: transparent;
}

.data-table th {
    background: #191a22;
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 0.75px;
    padding: 1.1rem 1.25rem;
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 2;
    white-space: nowrap;
    text-align: left;
}

.data-table td {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    font-size: 0.95rem;
    vertical-align: middle;
    text-align: left;
}

.data-table th.col-center,
.data-table td.col-center {
    text-align: center;
}

.data-table tbody tr {
    transition: background-color 0.18s ease;
}

.data-table tbody tr:hover {
    background: rgba(0, 229, 255, 0.035);
}

.data-table tbody tr:last-child td {
    border-bottom: none;
}

.date-cell {
    font-weight: 600;
    color: #ffffff;
    font-variant-numeric: tabular-nums;
    letter-spacing: 0.2px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
}

/* Score Severity Pills */
.score-pill {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 32px;
    padding: 0 6px;
    border-radius: 8px;
    font-weight: 700;
    font-size: 0.92rem;
    font-variant-numeric: tabular-nums;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.score-pill.badge-mild {
    background: rgba(0, 230, 118, 0.12);
    color: var(--success);
    border: 1px solid rgba(0, 230, 118, 0.28);
}

.score-pill.badge-mod {
    background: rgba(255, 179, 0, 0.14);
    color: var(--warning);
    border: 1px solid rgba(255, 179, 0, 0.32);
}

.score-pill.badge-severe {
    background: rgba(255, 77, 77, 0.18);
    color: var(--error);
    border: 1px solid rgba(255, 77, 77, 0.4);
    box-shadow: 0 0 10px rgba(255, 77, 77, 0.25);
    font-weight: 800;
}

.table-scroll-hint {
    display: none;
    font-size: 0.8rem;
    color: var(--text-secondary);
    align-items: center;
    gap: 6px;
}


/* Landing Page Hero Styles */
.hero-section {
    text-align: center;
    max-width: 800px;
    margin: 3.5rem auto 2rem;
}

.hero-title {
    font-size: clamp(2rem, 6vw, 3.2rem);
    margin-bottom: 1.25rem;
    line-height: 1.2;
}

.hero-desc {
    font-size: clamp(1.05rem, 3vw, 1.25rem);
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    line-height: 1.7;
}

.hero-cta-group {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-bottom: 3.5rem;
    flex-wrap: wrap;
}

.hero-cta-group .btn {
    font-size: 1.1rem;
    padding: 0.9rem 2rem;
}

/* Footer */
footer {
    text-align: center;
    padding: 2rem 0;
    padding-bottom: max(2rem, env(safe-area-inset-bottom));
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border);
    margin-top: auto;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* ======================================================
   Mobile Responsive Media Queries (< 768px)
====================================================== */
@media (max-width: 768px) {
    .container {
        width: 92%;
        padding: 1.25rem 0;
    }

    /* Show hamburger toggle button */
    .mobile-nav-toggle {
        display: flex;
    }

    /* Collapsible slide-down mobile nav */
    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(30, 30, 36, 0.98);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        border-bottom: 1px solid var(--border);
        box-shadow: 0 16px 28px rgba(0, 0, 0, 0.5);
        max-height: 0;
        overflow: hidden;
        opacity: 0;
        pointer-events: none;
        transition: max-height 0.35s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.25s ease;
    }

    .nav-menu.is-open {
        max-height: 380px;
        opacity: 1;
        pointer-events: auto;
    }

    .nav-menu ul {
        flex-direction: column;
        width: 100%;
        padding: 1.25rem 1rem;
        gap: 8px;
    }

    .nav-menu ul li {
        width: 100%;
    }

    .nav-link {
        display: block;
        width: 100%;
        padding: 0.85rem 1rem;
        border-radius: 8px;
        font-size: 1.05rem;
        background: rgba(255, 255, 255, 0.03);
        border: 1px solid rgba(255, 255, 255, 0.04);
    }

    .nav-link:active {
        background: rgba(0, 229, 255, 0.15);
    }

    .nav-logout {
        color: var(--error) !important;
        border-color: rgba(255, 77, 77, 0.2) !important;
    }

    .nav-btn {
        width: 100%;
        padding: 0.85rem 1rem;
        font-size: 1.05rem;
        text-align: center;
    }

    /* Cards & Layout on Mobile */
    .card {
        padding: 1.25rem;
        border-radius: 12px;
        margin-bottom: 1.5rem;
    }

    .prediction-box {
        padding: 1.25rem;
    }

    .hero-section {
        margin: 1.75rem auto 1.5rem;
    }

    .hero-cta-group {
        flex-direction: column;
        width: 100%;
        gap: 12px;
        margin-bottom: 2.5rem;
    }

    .hero-cta-group .btn {
        width: 100%;
    }

    /* Table horizontal scroll hint */
    .table-scroll-hint {
        display: flex;
    }

    .data-table th,
    .data-table td {
        padding: 0.75rem 0.75rem;
        font-size: 0.875rem;
    }
}

/* Smaller mobile phones (< 480px) */
@media (max-width: 480px) {
    .container {
        width: 94%;
        padding: 1rem 0;
    }

    .card {
        padding: 1.1rem;
    }

    .slider-group {
        padding: 0.85rem 0.9rem;
    }

    .logo-text {
        font-size: 1.3rem;
    }

    .logo-container img {
        height: 34px;
    }

    .prediction-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .prediction-header .btn {
        width: 100%;
    }

    .table-card-header {
        padding: 1rem 1.1rem;
        flex-direction: column;
        align-items: flex-start;
    }

    .metrics-grid {
        grid-template-columns: 1fr 1fr;
        gap: 10px;
    }

    .metric-card {
        padding: 1rem;
    }

    .metric-value {
        font-size: 1.5rem;
    }
}

/* ======================================================
   Print Styles for Clinical Report
====================================================== */
@media print {
    header, footer, .mobile-nav-toggle, .btn-print, .table-scroll-hint, .report-header-bar a {
        display: none !important;
    }
    
    body {
        background: #ffffff !important;
        color: #111111 !important;
        font-size: 12pt;
    }
    
    .container {
        max-width: 100% !important;
        width: 100% !important;
        padding: 0 !important;
        margin: 0 !important;
    }
    
    .card, .prediction-box, .metric-card, .table-card {
        background: #ffffff !important;
        color: #111111 !important;
        border: 1px solid #d0d0d8 !important;
        box-shadow: none !important;
        page-break-inside: avoid;
        margin-bottom: 1.5rem !important;
    }

    .table-card-header {
        background: #f4f4f8 !important;
        border-bottom: 1px solid #d0d0d8 !important;
    }

    .table-card-header h3 {
        color: #111111 !important;
    }
    
    .data-table {
        background: #ffffff !important;
        min-width: 100% !important;
    }
    
    .data-table th {
        background: #f0f0f5 !important;
        color: #333333 !important;
        border-bottom: 2px solid #333333 !important;
    }
    
    .data-table td {
        color: #111111 !important;
        border-bottom: 1px solid #e0e0e0 !important;
    }
    
    .score-pill {
        border: 1px solid #888888 !important;
        background: transparent !important;
        color: #000000 !important;
    }
    
    .score-pill.badge-severe {
        font-weight: bold;
        text-decoration: underline;
    }
}