/* ============================================================
   SMART PARKING MONITOR — Control Room UI
   Palette : #0B0E14 (void) · #121822 (surface) · #1B2330 (surface-2)
             #E8ECF1 (text) · #76879C (muted) · #00E5C7 (signal/cyan)
             #FFB020 (alert/amber)
   Type    : "JetBrains Mono" (display/data) + "Inter" (body)
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;600;700;800&family=Inter:wght@400;500;600;700&display=swap');

:root {
    --void: #0a0d13;
    --surface: #121822;
    --surface-2: #1a212d;
    --line: #232c3a;
    --text: #e8ecf1;
    --muted: #76879c;
    --muted-dim: #4b5666;
    --signal: #00e5c7;
    --signal-dim: rgba(0, 229, 199, 0.12);
    --alert: #ffb020;
    --alert-dim: rgba(255, 176, 32, 0.12);
    --danger: #ff5d5d;
    --danger-dim: rgba(255, 93, 93, 0.12);
    --radius: 4px;
}

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

body {
    font-family: 'Inter', sans-serif;
    background:
        radial-gradient(ellipse 1200px 600px at 50% -10%, rgba(0, 229, 199, 0.07), transparent 60%),
        var(--void);
    color: var(--text);
    min-height: 100vh;
    padding: 32px 24px 64px;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1180px;
    margin: 0 auto;
}

/* ---------------- Header ---------------- */
.header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 36px;
    padding-bottom: 22px;
    border-bottom: 1px solid var(--line);
    text-align: left;
}

.header h1 {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.01em;
    color: var(--text);
    display: flex;
    align-items: baseline;
    gap: 10px;
}

.header h1::before {
    content: "";
    display: inline-block;
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--signal);
    box-shadow: 0 0 0 4px var(--signal-dim);
    animation: pulse-dot 2.4s ease-in-out infinite;
    flex-shrink: 0;
}

.header p {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.72rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--muted);
    margin-top: 6px;
}

@keyframes pulse-dot {
    0%, 100% { box-shadow: 0 0 0 4px var(--signal-dim); }
    50% { box-shadow: 0 0 0 7px transparent; }
}

/* ---------------- Stats ---------------- */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1px;
    background: var(--line);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    overflow: hidden;
    margin-bottom: 28px;
}

.stat-card {
    background: var(--surface);
    padding: 22px 24px;
    text-align: left;
    position: relative;
}

.stat-card h3 {
    font-family: 'JetBrains Mono', monospace;
    color: var(--muted);
    font-size: 0.68rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin-bottom: 12px;
}

.stat-card .value {
    font-family: 'JetBrains Mono', monospace;
    font-size: 2.4rem;
    font-weight: 700;
    color: var(--text);
    line-height: 1;
    font-variant-numeric: tabular-nums;
}

.stat-card:nth-child(2) .value { color: var(--alert); }
.stat-card:nth-child(3) .value { color: var(--signal); }

/* ---------------- Content Sections ---------------- */
.content-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.section-box {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 20px;
    display: flex;
    flex-direction: column;
}

.section-box h2 {
    font-family: 'JetBrains Mono', monospace;
    color: var(--text);
    margin-bottom: 16px;
    font-size: 0.82rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--line);
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Live indicator badge on the camera panel title */
.section-box:first-child h2::after {
    content: "LIVE";
    margin-left: auto;
    font-size: 0.62rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    color: var(--signal);
    background: var(--signal-dim);
    padding: 3px 8px;
    border-radius: 3px;
}

/* ---------------- Image / Viewfinder frame ---------------- */
.image-container {
    position: relative;
    width: 100%;
    aspect-ratio: 4/3;
    background:
        repeating-linear-gradient(0deg, rgba(255,255,255,0.025) 0px, rgba(255,255,255,0.025) 1px, transparent 1px, transparent 3px),
        var(--void);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    overflow: hidden;
    margin-bottom: 16px;
}

/* Corner-bracket viewfinder overlay — the signature element */
.image-container::before,
.image-container::after,
.image-container .no-image::before,
.image-container .no-image::after {
    content: "";
    position: absolute;
    width: 18px;
    height: 18px;
    border-color: var(--muted-dim);
    border-style: solid;
    z-index: 2;
    pointer-events: none;
    transition: border-color 0.3s ease;
}
.image-container::before { top: 10px; left: 10px; border-width: 2px 0 0 2px; }
.image-container::after { top: 10px; right: 10px; border-width: 2px 2px 0 0; }
.image-container .no-image::before { bottom: 10px; left: 10px; border-width: 0 0 2px 2px; position: absolute; }
.image-container .no-image::after { bottom: 10px; right: 10px; border-width: 0 2px 2px 0; position: absolute; }

.image-container img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.no-image {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    color: var(--muted-dim);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.74rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    position: relative;
}

/* ---------------- Buttons ---------------- */
button {
    background: var(--signal);
    color: #04130f;
    border: none;
    padding: 13px 24px;
    border-radius: var(--radius);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.03em;
    text-transform: uppercase;
    cursor: pointer;
    transition: filter 0.15s ease, transform 0.1s ease;
    width: 100%;
}

button:hover:not(:disabled) {
    filter: brightness(1.12);
}

button:active:not(:disabled) {
    transform: scale(0.99);
}

button:disabled {
    background: var(--surface-2);
    color: var(--muted);
    cursor: not-allowed;
}

#uploadBtn {
    background: var(--surface-2);
    color: var(--text);
    border: 1px solid var(--line);
}

#uploadBtn:hover:not(:disabled) {
    border-color: var(--signal);
    color: var(--signal);
    filter: none;
}

/* ---------------- Upload form ---------------- */
.upload-form {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 4px;
}

.file-input-wrapper {
    position: relative;
    overflow: hidden;
    display: inline-block;
    width: 100%;
}

.file-input-wrapper input[type=file] {
    position: absolute;
    left: -9999px;
}

.file-input-label {
    display: block;
    padding: 12px 24px;
    background: transparent;
    color: var(--muted);
    border: 1px dashed var(--line);
    border-radius: var(--radius);
    text-align: center;
    cursor: pointer;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.78rem;
    font-weight: 500;
    letter-spacing: 0.03em;
    text-transform: uppercase;
    transition: border-color 0.15s ease, color 0.15s ease;
}

.file-input-label:hover {
    border-color: var(--signal);
    color: var(--signal);
}

.file-name {
    color: var(--muted);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    margin-top: 6px;
    text-align: center;
}

/* ---------------- Detection results ---------------- */
.detection-info {
    background: var(--surface-2);
    border: 1px solid var(--line);
    padding: 14px;
    border-radius: var(--radius);
    margin-top: 14px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

.detection-item {
    text-align: center;
}

.detection-item label {
    display: block;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--muted);
    margin-bottom: 6px;
}

.detection-item .value {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--signal);
    font-variant-numeric: tabular-nums;
}

/* ---------------- Status messages ---------------- */
.status-message {
    padding: 11px 14px;
    border-radius: var(--radius);
    margin-top: 10px;
    text-align: left;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.76rem;
    font-weight: 500;
    display: none;
    border: 1px solid transparent;
}

.status-message.success {
    background: var(--signal-dim);
    color: var(--signal);
    border-color: rgba(0, 229, 199, 0.3);
    display: none;
}

.status-message.error {
    background: var(--danger-dim);
    color: var(--danger);
    border-color: rgba(255, 93, 93, 0.3);
}

.status-message.show {
    display: block;
}

.timestamp {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.72rem;
    color: var(--muted-dim);
    text-align: center;
    margin-top: 10px;
    letter-spacing: 0.02em;
}

/* ---------------- Responsive ---------------- */
@media (max-width: 768px) {
    body { padding: 20px 16px 48px; }

    .header {
        flex-direction: column;
        align-items: flex-start;
        gap: 4px;
    }

    .content-section {
        grid-template-columns: 1fr;
    }

    .header h1 {
        font-size: 1.2rem;
    }

    .stat-card .value {
        font-size: 1.9rem;
    }
}

/* ---------------- Accessibility ---------------- */
button:focus-visible,
.file-input-label:focus-visible,
input:focus-visible {
    outline: 2px solid var(--signal);
    outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
    .header h1::before {
        animation: none;
    }
}