/* ══════════════════════════════════════════════════════════════════════
   AstroTriage v2.0 — NASA Blue Theme (Final)
   NASA HUNCH Medical Triage • ClawAgents • Gemini 3 Flash
   ══════════════════════════════════════════════════════════════════════ */

/* ── CSS Custom Properties ─────────────────────────────────────────── */
:root {
    /* NASA Deep Blue Palette */
    --bg-body: #0b1426;
    --bg-white: #111d35;
    --bg-surface: #162545;
    --bg-elevated: #1c2e52;
    --bg-input: #13203a;

    /* Borders & Glass */
    --border-light: rgba(78, 159, 255, 0.15);
    --border-focus: #4e9fff;
    --glass-bg: rgba(17, 29, 53, 0.88);
    --glass-border: rgba(78, 159, 255, 0.12);
    --glass-hover: rgba(22, 37, 69, 0.95);
    --glass-blur: 20px;
    --shadow-sm: 0 1px 4px rgba(0, 0, 0, 0.25);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.35);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.4);
    --shadow-blue: 0 4px 20px rgba(78, 159, 255, 0.25);

    /* Accent Colors */
    --accent-blue: #4e9fff;
    --accent-cyan: #22d3ee;
    --accent-purple: #a78bfa;
    --accent-pink: #f472b6;
    --accent-green: #34d399;
    --accent-amber: #fbbf24;
    --accent-red: #f87171;
    --accent-orange: #fb923c;

    /* Text */
    --text-primary: #e8edf5;
    --text-secondary: #94a3c4;
    --text-muted: #5e7091;

    /* Triage Colors */
    --triage-emergency: #f87171;
    --triage-urgent: #fb923c;
    --triage-moderate: #fbbf24;
    --triage-low: #34d399;
    --triage-emergency-bg: rgba(248, 113, 113, 0.12);
    --triage-urgent-bg: rgba(251, 146, 60, 0.12);
    --triage-moderate-bg: rgba(251, 191, 36, 0.12);
    --triage-low-bg: rgba(52, 211, 153, 0.12);

    /* Sizing / Spacing */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --header-h: 60px;
    --max-w: 1100px;

    /* Transitions */
    --ease-spring: cubic-bezier(.22, 1, .36, 1);
    --transition-fast: 0.15s var(--ease-spring);
    --transition-normal: 0.25s var(--ease-spring);
    --transition-slow: 0.5s var(--ease-spring);
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-body);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

a { color: var(--accent-blue); text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: #7ab8ff; }

/* ── Subtle Gradient Background ────────────────────────────────────── */
.aurora-bg {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background: 
        radial-gradient(ellipse at 20% 0%, rgba(78, 159, 255, 0.12), transparent 60%),
        radial-gradient(ellipse at 80% 100%, rgba(167, 139, 250, 0.1), transparent 60%),
        radial-gradient(ellipse at 50% 50%, rgba(34, 211, 238, 0.06), transparent 70%);
}
.aurora-bg .orb { display: none; }

.star-field { display: none; }

/* ── Header ────────────────────────────────────────────────────────── */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    height: var(--header-h);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
    background: rgba(11, 20, 38, 0.92);
    backdrop-filter: blur(var(--glass-blur));
    border-bottom: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
}

.header-brand {
    display: flex;
    align-items: center;
    gap: 0.6rem;
}
.header-brand .logo-icon {
    font-size: 1.5rem;
}
.header-brand h1 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}
.header-brand .version-badge {
    font-size: 0.6rem;
    padding: 2px 7px;
    background: var(--bg-elevated);
    border: 1px solid var(--border-light);
    border-radius: 999px;
    color: var(--text-muted);
    font-weight: 600;
}

.header-nav {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.nav-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.45rem 0.9rem;
    border-radius: var(--radius-sm);
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--text-secondary);
    background: transparent;
    border: 1px solid transparent;
    cursor: pointer;
    transition: all var(--transition-normal);
    text-decoration: none;
}
.nav-pill:hover {
    color: var(--text-primary);
    background: var(--bg-elevated);
}
.nav-pill.active {
    color: var(--accent-blue);
    background: rgba(78, 159, 255, 0.12);
    border-color: rgba(78, 159, 255, 0.25);
    font-weight: 600;
}

/* Engine Status Dots */
.engine-status-bar {
    display: flex;
    align-items: center;
    gap: 0.7rem;
    padding-left: 0.75rem;
    border-left: 1px solid var(--border-light);
    margin-left: 0.5rem;
}
.engine-dot {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    font-size: 0.7rem;
    color: var(--text-muted);
    font-weight: 500;
}
.engine-dot .dot {
    width: 7px; height: 7px;
    border-radius: 50%;
    background: var(--accent-green);
    box-shadow: 0 0 4px rgba(16, 185, 129, 0.5);
}
.engine-dot .dot.offline {
    background: #3a4a6b;
    box-shadow: none;
}

/* ── Main Content ──────────────────────────────────────────────────── */
.main-content {
    position: relative;
    z-index: 1;
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 2rem 1.5rem 3rem;
    min-height: calc(100vh - var(--header-h));
}

/* ── Glass Card ────────────────────────────────────────────────────── */
.glass-card {
    background: var(--bg-white);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}
.glass-card:hover {
    box-shadow: var(--shadow-md);
}

/* ── Page Header ───────────────────────────────────────────────────── */
.page-header {
    text-align: center;
    margin-bottom: 2rem;
}
.page-header h2 {
    font-size: 1.65rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    color: var(--text-primary);
    margin-bottom: 0.35rem;
}
.page-header p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    max-width: 520px;
    margin: 0 auto;
}

/* ── Stepper / Wizard ──────────────────────────────────────────────── */
.stepper {
    display: flex;
    justify-content: center;
    gap: 0;
    margin-bottom: 1.75rem;
}
.stepper-step {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.stepper-step .step-num {
    width: 34px; height: 34px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.82rem;
    font-weight: 700;
    background: var(--bg-elevated);
    border: 2px solid var(--border-light);
    color: var(--text-muted);
    transition: all var(--transition-normal);
}
.stepper-step.active .step-num {
    background: var(--accent-blue);
    border-color: var(--accent-blue);
    color: white;
    box-shadow: 0 0 0 4px rgba(78, 159, 255, 0.2);
}
.stepper-step.completed .step-num {
    background: var(--accent-green);
    border-color: var(--accent-green);
    color: white;
}
.stepper-step .step-label {
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--text-muted);
}
.stepper-step.active .step-label {
    color: var(--text-primary);
    font-weight: 600;
}
.stepper-connector {
    width: 48px;
    height: 2px;
    background: var(--border-light);
    margin: 0 0.5rem;
    align-self: center;
    position: relative;
    top: -0.4rem;
    border-radius: 1px;
}

/* ── Symptom Grid ──────────────────────────────────────────────────── */
.symptom-categories {
    display: grid;
    gap: 0.75rem;
}

.category-block {
    background: var(--bg-white);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}
.category-header {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    padding: 0.85rem 1.1rem;
    cursor: pointer;
    user-select: none;
    transition: background var(--transition-fast);
}
.category-header:hover {
    background: var(--bg-surface);
}
.category-header .cat-icon {
    font-size: 1.15rem;
}
.category-header .cat-name {
    font-weight: 600;
    font-size: 0.9rem;
    flex: 1;
    color: var(--text-primary);
}
.category-header .cat-count {
    font-size: 0.7rem;
    padding: 2px 9px;
    background: var(--bg-elevated);
    border-radius: 999px;
    color: var(--text-muted);
    font-weight: 600;
}
.category-header .chevron {
    color: var(--text-muted);
    transition: transform var(--transition-normal);
    font-size: 0.75rem;
}

.symptom-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(195px, 1fr));
    gap: 0.4rem;
    padding: 0.25rem 1.1rem 1.1rem;
}

.symptom-chip {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.55rem 0.75rem;
    background: var(--bg-surface);
    border: 1.5px solid transparent;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 0.82rem;
    color: var(--text-secondary);
}
.symptom-chip:hover {
    border-color: var(--accent-blue);
    background: rgba(78, 159, 255, 0.08);
    color: var(--text-primary);
}
.symptom-chip.selected {
    border-color: var(--accent-blue);
    background: rgba(78, 159, 255, 0.15);
    color: var(--accent-blue);
    font-weight: 500;
}
.symptom-chip.red-flag {
    border-color: rgba(248, 113, 113, 0.3);
}
.symptom-chip.red-flag.selected {
    border-color: var(--triage-emergency);
    background: rgba(248, 113, 113, 0.12);
    color: var(--triage-emergency);
}

.symptom-chip input[type="checkbox"] {
    display: none;
}
.symptom-chip .check-mark {
    width: 16px; height: 16px;
    border-radius: 4px;
    border: 1.5px solid #3a4a6b;
    display: flex;
    align-items: center;
    justify-content: center;
    color: transparent;
    transition: all var(--transition-fast);
    font-size: 0.65rem;
    flex-shrink: 0;
}
.symptom-chip.selected .check-mark {
    background: var(--accent-blue);
    border-color: var(--accent-blue);
    color: white;
}
.symptom-chip.red-flag.selected .check-mark {
    background: var(--triage-emergency);
    border-color: var(--triage-emergency);
}

/* ── HUD Counter ───────────────────────────────────────────────────── */
.hud-counter {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    z-index: 80;
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.6rem 1rem;
    background: var(--bg-white);
    border: 1px solid var(--glass-border);
    border-radius: 999px;
    font-size: 0.8rem;
    color: var(--text-secondary);
    box-shadow: var(--shadow-md);
    font-weight: 500;
}
.hud-counter .count-ring {
    position: relative;
    width: 36px; height: 36px;
}
.hud-counter .count-ring svg {
    transform: rotate(-90deg);
}
.hud-counter .count-ring circle {
    fill: none;
    stroke-width: 3;
}
.hud-counter .count-ring .ring-bg {
    stroke: var(--bg-elevated);
}
.hud-counter .count-ring .ring-fill {
    stroke: var(--accent-blue);
    stroke-linecap: round;
    transition: stroke-dashoffset var(--transition-normal);
}
.hud-counter .count-num {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--accent-blue);
}

/* ── Symptom Tag (summary) ────────────────────────────────────────── */
.symptom-tag {
    padding: 0.2rem 0.55rem;
    background: rgba(78, 159, 255, 0.15);
    border: 1px solid rgba(78, 159, 255, 0.25);
    border-radius: 999px;
    font-size: 0.72rem;
    color: var(--accent-blue);
    font-weight: 500;
}

/* ── Vitals Section ────────────────────────────────────────────────── */
.vitals-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 0.9rem;
}
.vital-input-group {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}
.vital-input-group label {
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.35rem;
}
.vital-input-group input {
    padding: 0.6rem 0.8rem;
    background: var(--bg-input);
    border: 1.5px solid var(--border-light);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.88rem;
    transition: all var(--transition-fast);
    outline: none;
    font-family: inherit;
}
.vital-input-group input:focus {
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px rgba(78, 159, 255, 0.2);
    background: var(--bg-white);
}
.vital-input-group input::placeholder {
    color: var(--text-muted);
}

/* ── Buttons ───────────────────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.45rem;
    padding: 0.65rem 1.25rem;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all var(--transition-normal);
    text-decoration: none;
    font-family: inherit;
}
.btn:active { transform: scale(0.97); }

.btn-primary {
    background: var(--accent-blue);
    color: white;
    box-shadow: var(--shadow-blue);
}
.btn-primary:hover {
    background: #3b8ae8;
    box-shadow: 0 6px 24px rgba(78, 159, 255, 0.35);
    color: white;
}

.btn-secondary {
    background: var(--bg-white);
    color: var(--text-secondary);
    border: 1px solid var(--border-light);
}
.btn-secondary:hover {
    background: var(--bg-elevated);
    color: var(--text-primary);
    border-color: rgba(78, 159, 255, 0.25);
}

/* Engine Buttons */
.btn-engine-rule {
    background: var(--accent-green);
    color: white;
}
.btn-engine-rule:hover { background: #2dd4a8; color: white; }

.btn-engine-ml {
    background: var(--accent-blue);
    color: white;
}
.btn-engine-ml:hover { background: #7ab8ff; color: white; }

.btn-engine-agent {
    background: var(--accent-purple);
    color: white;
}
.btn-engine-agent:hover { background: #7c3aed; color: white; }

.btn-group {
    display: flex;
    gap: 0.65rem;
    flex-wrap: wrap;
    margin-top: 1.5rem;
}

/* ── Triage Badge ──────────────────────────────────────────────────── */
.triage-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.5rem 1.1rem;
    border-radius: 999px;
    font-weight: 700;
    font-size: 0.82rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}
.triage-badge.EMERGENCY {
    background: var(--triage-emergency-bg);
    color: var(--triage-emergency);
    border: 1px solid rgba(248, 113, 113, 0.3);
}
.triage-badge.URGENT {
    background: var(--triage-urgent-bg);
    color: var(--triage-urgent);
    border: 1px solid rgba(251, 146, 60, 0.3);
}
.triage-badge.MODERATE {
    background: var(--triage-moderate-bg);
    color: var(--triage-moderate);
    border: 1px solid rgba(251, 191, 36, 0.3);
}
.triage-badge.LOW {
    background: var(--triage-low-bg);
    color: var(--triage-low);
    border: 1px solid rgba(52, 211, 153, 0.3);
}

/* ── Result Page ───────────────────────────────────────────────────── */
.result-hero {
    text-align: center;
    padding: 2rem 1.5rem;
}
.confidence-bar {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    justify-content: center;
}
.confidence-bar .bar-track {
    width: 180px;
    height: 6px;
    background: var(--bg-elevated);
    border-radius: 999px;
    overflow: hidden;
}
.confidence-bar .bar-fill {
    height: 100%;
    border-radius: 999px;
    background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan));
    transition: width 1s var(--ease-spring);
}
.confidence-bar .bar-label {
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--accent-blue);
}

/* ── Timeline Rationale ────────────────────────────────────────────── */
.rationale-timeline {
    position: relative;
    padding-left: 1.75rem;
    margin: 1rem 0;
}
.rationale-timeline::before {
    content: '';
    position: absolute;
    left: 0.45rem;
    top: 0; bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--accent-blue), var(--accent-purple), var(--border-light));
    border-radius: 1px;
}
.timeline-step {
    position: relative;
    padding: 0.75rem 0 1.25rem;
}
.timeline-step::before {
    content: '';
    position: absolute;
    left: -1.45rem;
    top: 1rem;
    width: 10px; height: 10px;
    border-radius: 50%;
    background: var(--accent-blue);
    border: 2px solid var(--bg-white);
    box-shadow: 0 0 0 3px rgba(78, 159, 255, 0.2);
}
.timeline-step .step-header {
    display: flex;
    align-items: center;
    gap: 0.45rem;
    margin-bottom: 0.3rem;
}
.timeline-step .step-num-tag {
    font-size: 0.6rem;
    padding: 1px 7px;
    background: var(--accent-blue);
    color: white;
    border-radius: 999px;
    font-weight: 700;
}
.timeline-step .step-title {
    font-weight: 600;
    font-size: 0.88rem;
    color: var(--text-primary);
}
.timeline-step .step-detail {
    font-size: 0.82rem;
    color: var(--text-secondary);
    line-height: 1.6;
}
.timeline-step .step-conclusion {
    font-size: 0.78rem;
    color: var(--accent-green);
    font-weight: 500;
    margin-top: 0.25rem;
}

/* ── Crew Protocols ────────────────────────────────────────────────── */
.protocol-list {
    list-style: none;
    display: grid;
    gap: 0.4rem;
}
.protocol-item {
    padding: 0.65rem 0.9rem;
    background: var(--bg-surface);
    border-radius: var(--radius-sm);
    border-left: 3px solid var(--accent-blue);
    font-size: 0.82rem;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
    line-height: 1.5;
}
.protocol-item:hover {
    background: var(--bg-elevated);
    border-left-color: var(--accent-purple);
}

/* ── Comparison Grid ───────────────────────────────────────────────── */
.compare-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}
.engine-card {
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    background: var(--bg-white);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}
.engine-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}
.engine-card.engine-rule { border-top: 3px solid var(--accent-green); }
.engine-card.engine-ml { border-top: 3px solid var(--accent-blue); }
.engine-card.engine-agent { border-top: 3px solid var(--accent-purple); }

.engine-card .engine-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.25rem 0.7rem;
    border-radius: 999px;
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.75rem;
}
.engine-rule .engine-tag { background: var(--triage-low-bg); color: var(--accent-green); }
.engine-ml .engine-tag { background: rgba(78,159,255,0.15); color: var(--accent-blue); }
.engine-agent .engine-tag { background: rgba(167,139,250,0.15); color: var(--accent-purple); }

.engine-card h3 {
    font-size: 1rem;
    margin-bottom: 0.5rem;
    font-weight: 700;
}
.engine-card .engine-detail {
    font-size: 0.82rem;
    color: var(--text-secondary);
    margin-bottom: 0.4rem;
    line-height: 1.5;
}

/* ── Agreement Score ───────────────────────────────────────────────── */
.agreement-display {
    text-align: center;
    padding: 1.5rem;
}
.agreement-ring {
    position: relative;
    width: 100px; height: 100px;
    margin: 0 auto 0.75rem;
}
.agreement-ring svg { transform: rotate(-90deg); }
.agreement-ring circle { fill: none; stroke-width: 6; }
.agreement-ring .ring-bg { stroke: var(--bg-elevated); }
.agreement-ring .ring-fill {
    stroke: var(--accent-green);
    stroke-linecap: round;
    transition: stroke-dashoffset 1s var(--ease-spring);
}
.agreement-ring .ring-label {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--accent-green);
}

/* ── Loading / Spinner ─────────────────────────────────────────────── */
.loading-overlay {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 200;
    background: rgba(11, 20, 38, 0.9);
    backdrop-filter: blur(8px);
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 1.25rem;
}
.loading-overlay.active { display: flex; }

.spinner-orbit {
    width: 48px; height: 48px;
    position: relative;
}
.spinner-orbit .orbit {
    position: absolute;
    inset: 0;
    border: 2px solid transparent;
    border-top-color: var(--accent-blue);
    border-radius: 50%;
    animation: orbitSpin 1.2s linear infinite;
}
.spinner-orbit .orbit:nth-child(2) {
    inset: 5px;
    border-top-color: var(--accent-purple);
    animation-duration: 1.8s;
    animation-direction: reverse;
}
.spinner-orbit .orbit:nth-child(3) {
    inset: 10px;
    border-top-color: var(--accent-cyan);
    animation-duration: 2.4s;
}
.loading-text {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
}

@keyframes orbitSpin { to { transform: rotate(360deg); } }

/* ── Info Sections ─────────────────────────────────────────────────── */
.info-block {
    padding: 1rem;
    background: var(--bg-surface);
    border-radius: var(--radius-sm);
    border-left: 3px solid var(--accent-blue);
    margin: 0.75rem 0;
}
.info-block h4 {
    font-size: 0.82rem;
    color: var(--accent-blue);
    margin-bottom: 0.4rem;
    font-weight: 700;
}
.info-block p {
    font-size: 0.82rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ── Emergency Protocol ────────────────────────────────────────────── */
.emergency-banner {
    padding: 1.25rem;
    background: var(--triage-emergency-bg);
    border: 1px solid rgba(248, 113, 113, 0.25);
    border-radius: var(--radius-md);
    margin: 0.75rem 0;
}
.emergency-banner h3 {
    color: var(--triage-emergency);
    font-size: 1rem;
    margin-bottom: 0.35rem;
}

/* ── Footer ────────────────────────────────────────────────────────── */
.site-footer {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: 1.5rem;
    border-top: 1px solid var(--border-light);
    color: var(--text-muted);
    font-size: 0.75rem;
    background: var(--bg-white);
}
.site-footer .footer-brand {
    font-weight: 600;
    color: var(--text-secondary);
}

/* ── Utility classes ───────────────────────────────────────────────── */
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.hidden { display: none !important; }

/* ── Offline Banner ────────────────────────────────────────────────── */
.offline-banner {
    display: none;
    padding: 0.45rem 1rem;
    background: var(--triage-urgent-bg);
    border-bottom: 1px solid rgba(234, 88, 12, 0.2);
    text-align: center;
    font-size: 0.78rem;
    color: var(--accent-orange);
    font-weight: 500;
}
.offline-banner.show { display: block; }

/* ── Responsive ────────────────────────────────────────────────────── */
@media (max-width: 768px) {
    .site-header { padding: 0 1rem; }
    .header-brand h1 { font-size: 1rem; }
    .engine-status-bar { display: none; }
    .main-content { padding: 1.25rem 1rem 2rem; }
    .page-header h2 { font-size: 1.35rem; }
    .symptom-grid { grid-template-columns: 1fr; }
    .vitals-grid { grid-template-columns: 1fr; }
    .compare-grid { grid-template-columns: 1fr; }
    .btn-group { flex-direction: column; }
    .stepper-connector { width: 20px; }
    .hud-counter { bottom: 1rem; right: 1rem; padding: 0.4rem 0.6rem; font-size: 0.72rem; }
    .nav-pill span:not(.nav-icon) { display: none; }
}

@media (max-width: 480px) {
    .stepper { flex-wrap: wrap; gap: 0.5rem; }
    .stepper-connector { display: none; }
}

/* ── Print ─────────────────────────────────────────────────────────── */
@media print {
    .aurora-bg, .site-header, .site-footer,
    .hud-counter, .btn-group, .nav-pill, .engine-status-bar,
    .loading-overlay { display: none !important; }
    body { background: white; }
    .glass-card { box-shadow: none; border: 1px solid #ddd; }
    .triage-badge { -webkit-print-color-adjust: exact; print-color-adjust: exact; }
}

/* ── Reduced Motion ────────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ── Scrollbar ─────────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 7px; }
::-webkit-scrollbar-track { background: var(--bg-body); }
::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--accent-blue);
}

/* ══════════════════════════════════════════════════════════════════════
   ENGINE SELECTION — SHOWCASE AGENT
   ══════════════════════════════════════════════════════════════════════ */

/* Engine Selection Grid — Agent in center, taller */
.engine-selection-grid {
    display: grid;
    grid-template-columns: 1fr 1.15fr 1fr;
    gap: 1rem;
    align-items: stretch;
    margin-top: 1rem;
}
@media (max-width: 768px) {
    .engine-selection-grid {
        grid-template-columns: 1fr;
    }
}

/* Recommended Badge */
.engine-recommended {
    position: relative;
    border-color: rgba(139, 92, 246, 0.35) !important;
    box-shadow: 0 4px 20px rgba(139, 92, 246, 0.1) !important;
    background: linear-gradient(135deg, #faf8ff, #f5f0ff) !important;
}
.engine-recommended:hover {
    box-shadow: 0 6px 28px rgba(139, 92, 246, 0.18) !important;
}
.recommended-badge {
    position: absolute;
    top: -10px;
    right: 12px;
    background: linear-gradient(135deg, var(--accent-purple), #7c3aed);
    color: white;
    padding: 3px 12px;
    border-radius: 999px;
    font-size: 0.6rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    box-shadow: 0 2px 8px rgba(139, 92, 246, 0.3);
}

/* Engine Feature Lists */
.engine-features {
    list-style: none;
    padding: 0;
    margin: 0.75rem 0;
    display: grid;
    gap: 0.35rem;
}
.engine-features li {
    font-size: 0.78rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.35rem;
    line-height: 1.4;
}
.engine-rule .engine-features li { color: #047857; }
.engine-agent .engine-features li { color: #6d28d9; }
.engine-ml .engine-features li { color: #1d7acc; }

/* ML Card */
.engine-ml {
    border-top: 3px solid var(--accent-blue) !important;
}
.engine-ml .engine-tag {
    background: rgba(78, 159, 255, 0.1);
    color: var(--accent-blue);
}
.btn-engine-ml {
    background: linear-gradient(135deg, var(--accent-blue), #2563eb);
    color: white;
}
.btn-engine-ml:hover {
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    color: white;
}

/* ── HTMX Loading Indicator ────────────────────────────────────────── */
.htmx-indicator {
    display: none;
}
.htmx-request .htmx-indicator,
.htmx-request.htmx-indicator {
    display: flex;
}