/* ===================================================================
   nSplat – Styles
   Notum Robotics dark-tech theme
   =================================================================== */

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

:root {
    --bg:          #070b14;
    --surface:     #0e1525;
    --card:        #131d30;
    --border:      #1b2d4a;
    --primary:     #3b82f6;
    --primary-dim: #2563eb;
    --accent:      #818cf8;
    --success:     #10b981;
    --error:       #f87171;
    --text:        #e2e8f0;
    --muted:       #64748b;
    --radius:      14px;
    --radius-sm:   8px;
    --transition:  .25s cubic-bezier(.4,0,.2,1);
    --font:        'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
                   Oxygen, Ubuntu, Cantarell, sans-serif;
}

html { font-size: 16px; }
body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.hidden { display: none !important; }

/* ---------- Header ---------- */
.app-header {
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(16px) saturate(1.4);
    -webkit-backdrop-filter: blur(16px) saturate(1.4);
    background: rgba(7,11,20,.72);
    border-bottom: 1px solid var(--border);
}
.header-inner {
    max-width: 960px;
    margin: 0 auto;
    padding: 12px 24px;
    display: flex;
    align-items: center;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand-logo { height: 28px; width: auto; filter: brightness(0) invert(1); }
.brand-name { font-size: 1.55rem; font-weight: 700; letter-spacing: -.02em; }
.brand-name .accent { color: var(--primary); }
.brand-badge {
    font-size: .7rem;
    color: var(--muted);
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 2px 10px;
    white-space: nowrap;
}

/* ---------- Main ---------- */
main {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 32px 16px 48px;
}
.section { width: 100%; max-width: 560px; }

/* ---------- Upload Zone ---------- */
.upload-zone {
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    padding: 56px 32px;
    text-align: center;
    cursor: pointer;
    transition: border-color var(--transition), background var(--transition),
                box-shadow var(--transition);
}
.upload-zone:hover,
.upload-zone.dragover {
    border-color: var(--primary);
    background: rgba(59,130,246,.06);
    box-shadow: 0 0 40px rgba(59,130,246,.12);
}
.upload-icon { color: var(--muted); margin-bottom: 16px; transition: color var(--transition); }
.upload-zone:hover .upload-icon,
.upload-zone.dragover .upload-icon { color: var(--primary); }
.upload-title { font-size: 1.35rem; font-weight: 600; margin-bottom: 8px; }
.upload-subtitle { color: var(--muted); margin-bottom: 14px; }
.browse-link { color: var(--primary); text-decoration: underline; cursor: pointer; }
.upload-formats { font-size: .75rem; color: var(--muted); letter-spacing: .03em; }

/* ---------- Progress ---------- */
.section-progress {
    display: flex;
    flex-direction: column;
    align-items: center;
}
.progress-card {
    width: 100%;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px 28px 28px;
    text-align: center;
}
.preview-wrap {
    width: 120px;
    height: 120px;
    margin: 0 auto 20px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    border: 1px solid var(--border);
    display: none;            /* shown via JS */
}
.preview-wrap.visible { display: block; }
.preview-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.progress-title {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 6px;
}
.progress-msg {
    color: var(--muted);
    font-size: .88rem;
    margin-bottom: 20px;
    min-height: 1.2em;
}

/* bar */
.bar-track {
    height: 8px;
    background: var(--surface);
    border-radius: 999px;
    overflow: hidden;
    margin-bottom: 10px;
}
.bar-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--primary-dim), var(--accent));
    border-radius: 999px;
    transition: width .35s ease;
}
.bar-meta {
    display: flex;
    justify-content: space-between;
    font-size: .78rem;
    color: var(--muted);
}
.queue-badge {
    background: rgba(129,140,248,.12);
    color: var(--accent);
    padding: 2px 10px;
    border-radius: 999px;
    font-weight: 500;
}

/* ---------- Viewer ---------- */
.section-viewer {
    max-width: none;
    width: 100%;
    flex: 1;
    display: flex;
    flex-direction: column;
    position: relative;
}
.viewer-container {
    flex: 1;
    min-height: 55vh;
    width: 100%;
    border-radius: var(--radius);
    overflow: hidden;
    background: #000;
    position: relative;
}
/* Ensure canvas fills the container */
.viewer-container canvas {
    display: block;
    width: 100% !important;
    height: 100% !important;
}

.viewer-toolbar {
    position: absolute;
    top: 16px;
    right: 16px;
    display: flex;
    gap: 8px;
    z-index: 10;
}
.pill-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(14,21,37,.82);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border);
    color: var(--text);
    font-size: .82rem;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: 999px;
    cursor: pointer;
    transition: background var(--transition), border-color var(--transition);
}
.pill-btn:hover { background: var(--card); border-color: var(--primary); }
.pill-btn--accent { background: rgba(59,130,246,.18); border-color: var(--primary-dim); }
.pill-btn--accent:hover { background: rgba(59,130,246,.32); border-color: var(--primary); }
.pill-btn svg { flex-shrink: 0; }

.viewer-hint {
    text-align: center;
    padding: 10px;
    font-size: .75rem;
    color: var(--muted);
}
.hint-mobile { display: none; }
@media (hover: none) and (pointer: coarse) {
    .hint-desktop { display: none; }
    .hint-mobile  { display: inline; }
}

/* ---------- Error ---------- */
.section-error {
    display: flex;
    align-items: center;
    justify-content: center;
}
.error-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 40px 32px;
    text-align: center;
    max-width: 440px;
    width: 100%;
}
.error-icon { color: var(--error); margin-bottom: 12px; }
.error-card h2 { font-size: 1.2rem; margin-bottom: 10px; }
.error-text { color: var(--muted); font-size: .9rem; margin-bottom: 24px; word-break: break-word; }
.primary-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    padding: 12px 28px;
    font-size: .95rem;
    font-weight: 600;
    cursor: pointer;
    transition: background var(--transition);
}
.primary-btn:hover { background: var(--primary-dim); }

/* ---------- Footer ---------- */
.app-footer {
    border-top: 1px solid var(--border);
    background: var(--surface);
    padding: 24px 16px;
}
.footer-inner {
    max-width: 720px;
    margin: 0 auto;
    text-align: center;
}
.gdpr {
    font-size: .72rem;
    color: var(--muted);
    line-height: 1.55;
    margin-bottom: 12px;
}
.gdpr strong { color: var(--text); }
.footer-credits {
    font-size: .75rem;
    color: var(--muted);
    display: flex;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
}
.sep { opacity: .4; }

/* ---------- Responsive ---------- */
@media (max-width: 600px) {
    .header-inner { padding: 10px 14px; }
    .brand-name   { font-size: 1.3rem; }
    .brand-badge  { display: none; }
    .upload-zone  { padding: 40px 20px; }
    .upload-title { font-size: 1.15rem; }
    .progress-card { padding: 24px 18px 20px; }
    .viewer-toolbar { top: 8px; right: 8px; }
    .pill-btn { padding: 6px 12px; font-size: .76rem; }
}

/* ---------- Animated indeterminate shimmer on the bar ---------- */
.bar-fill.indeterminate {
    width: 100% !important;
    background: linear-gradient(
        90deg,
        var(--primary-dim) 25%,
        var(--accent) 50%,
        var(--primary-dim) 75%
    );
    background-size: 200% 100%;
    animation: shimmer 1.6s ease-in-out infinite;
}
@keyframes shimmer {
    0%   { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Pulse glow around the upload zone while dragging */
@keyframes pulse-glow {
    0%, 100% { box-shadow: 0 0 20px rgba(59,130,246,.15); }
    50%      { box-shadow: 0 0 40px rgba(59,130,246,.3); }
}
.upload-zone.dragover { animation: pulse-glow 1.2s ease-in-out infinite; }

/* viewer loading overlay */
.viewer-loading-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: rgba(0,0,0,.7);
    backdrop-filter: blur(6px);
    z-index: 5;
    color: var(--text);
    font-size: .9rem;
    gap: 12px;
}
.viewer-loading-overlay .bar-track {
    width: 200px;
}