/* =============================================
   Assignment 3 — Multi-Pose Detector Style
   ============================================= */

@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@300;400;500;600;700&family=DM+Mono:wght@400;500&display=swap');

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

:root {
  --bg:        #f5f5f0;
  --surface:   #ffffff;
  --surface2:  #f0eeea;
  --border:    #e4e2dc;
  --accent:    #2563eb;
  --accent2:   #0ea5e9;
  --orange:    #ea580c;
  --text:      #18181b;
  --text2:     #71717a;
  --text3:     #a1a1aa;
  --shadow-sm: 0 1px 4px rgba(0,0,0,.06);
  --shadow:    0 4px 24px rgba(0,0,0,.08);
  --shadow-lg: 0 12px 48px rgba(37,99,235,.12);
  --radius:    16px;
  --radius-sm: 10px;

  /* Person colors */
  --p0: #2563eb; --p1: #ea580c; --p2: #16a34a;
  --p3: #7c3aed; --p4: #db2777; --p5: #0891b2;
}

html, body { height:100%; font-family:'DM Sans',sans-serif; background:var(--bg); color:var(--text); -webkit-font-smoothing:antialiased; }

/* Header */
.app-header { display:flex; align-items:center; justify-content:space-between; padding:0 2rem; height:64px; background:var(--surface); border-bottom:1px solid var(--border); box-shadow:var(--shadow-sm); position:sticky; top:0; z-index:100; }
.header-logo { display:flex; align-items:center; gap:.65rem; }
.logo-icon { font-size:1.4rem; }
.logo-text { font-size:1.05rem; font-weight:600; letter-spacing:-.01em; }
.logo-text em { font-style:normal; color:var(--accent); }
.header-nav { display:flex; gap:.25rem; }
.nav-link { text-decoration:none; color:var(--text2); font-size:.875rem; font-weight:500; padding:.4rem .85rem; border-radius:8px; transition:background .15s, color .15s; }
.nav-link:hover { background:var(--surface2); color:var(--text); }
.nav-link.active { background:var(--accent); color:#fff; }

/* Layout */
.main-content { display:grid; grid-template-columns:1fr 320px; gap:1.5rem; padding:1.5rem 2rem; max-width:1280px; margin:0 auto; min-height:calc(100vh - 64px); }

/* Video */
.video-panel { display:flex; align-items:flex-start; justify-content:center; }
.video-container { position:relative; width:100%; max-width:680px; border-radius:var(--radius); overflow:hidden; background:#06090f; box-shadow:var(--shadow-lg); aspect-ratio:4/3; }
.video-container video, .video-container canvas { position:absolute; inset:0; width:100%; height:100%; object-fit:cover; }
.video-container canvas { z-index:2; }
.video-overlay { position:absolute; inset:0; z-index:10; display:flex; flex-direction:column; align-items:center; justify-content:center; gap:1rem; background:rgba(250,249,246,.93); backdrop-filter:blur(8px); color:var(--text2); font-size:.9rem; transition:opacity .4s; }
.video-overlay.hidden { opacity:0; pointer-events:none; }
.spinner { width:40px; height:40px; border:3px solid var(--border); border-top-color:var(--accent); border-radius:50%; animation:spin .8s linear infinite; }
@keyframes spin { to { transform:rotate(360deg); } }
.corner { position:absolute; width:20px; height:20px; z-index:3; pointer-events:none; }
.corner.tl { top:12px; left:12px; border-top:2px solid rgba(255,255,255,.5); border-left:2px solid rgba(255,255,255,.5); border-radius:4px 0 0 0; }
.corner.tr { top:12px; right:12px; border-top:2px solid rgba(255,255,255,.5); border-right:2px solid rgba(255,255,255,.5); border-radius:0 4px 0 0; }
.corner.bl { bottom:12px; left:12px; border-bottom:2px solid rgba(255,255,255,.5); border-left:2px solid rgba(255,255,255,.5); border-radius:0 0 0 4px; }
.corner.br { bottom:12px; right:12px; border-bottom:2px solid rgba(255,255,255,.5); border-right:2px solid rgba(255,255,255,.5); border-radius:0 0 4px 0; }

/* Overlay badges */
.mode-badge { position:absolute; top:14px; left:14px; z-index:5; background:rgba(0,0,0,.55); backdrop-filter:blur(6px); color:#fff; font-size:.75rem; font-weight:700; letter-spacing:.1em; padding:.3rem .8rem; border-radius:99px; transition:background .3s; }
.mode-badge.multi { background:rgba(37,99,235,.85); }
.person-count-badge { position:absolute; bottom:14px; left:14px; z-index:5; background:rgba(0,0,0,.55); backdrop-filter:blur(6px); color:#fff; font-size:.8rem; font-weight:600; padding:.3rem .8rem; border-radius:99px; }

/* Panel */
.control-panel { display:flex; flex-direction:column; gap:1rem; }
.stat-card { background:var(--surface); border:1px solid var(--border); border-radius:var(--radius-sm); padding:.85rem 1rem; display:flex; flex-direction:column; gap:.2rem; box-shadow:var(--shadow-sm); }
.stat-card.primary { border-left:3px solid var(--accent); }
.stat-label { font-size:.7rem; font-weight:600; letter-spacing:.06em; text-transform:uppercase; color:var(--text3); }
.stat-value { font-size:1.05rem; font-weight:600; color:var(--text); }
.stat-value.mono { font-family:'DM Mono',monospace; }
.stat-value.accent { color:var(--accent); }
.stats-grid { display:grid; grid-template-columns:1fr 1fr; gap:.65rem; }

/* Toggle button */
.btn-toggle { display:flex; align-items:center; justify-content:center; gap:.5rem; width:100%; padding:.75rem 1rem; background:var(--accent); color:#fff; border:none; border-radius:var(--radius-sm); font-family:'DM Sans',sans-serif; font-size:.9rem; font-weight:600; cursor:pointer; transition:all .18s; }
.btn-toggle:hover { background:#1d4ed8; transform:translateY(-1px); box-shadow:0 4px 16px rgba(37,99,235,.3); }
.btn-toggle.active { background:var(--orange); }
.btn-toggle.active:hover { background:#c2410c; box-shadow:0 4px 16px rgba(234,88,12,.3); }
.btn-icon { font-size:1.1rem; }

/* Settings group */
.settings-group { display:flex; flex-direction:column; gap:.75rem; padding:.9rem 1rem; background:var(--surface); border:1px solid var(--border); border-radius:var(--radius-sm); box-shadow:var(--shadow-sm); }
.settings-group.hidden { display:none; }

.control-group { display:flex; flex-direction:column; gap:.45rem; }
.control-label { font-size:.75rem; font-weight:600; letter-spacing:.04em; text-transform:uppercase; color:var(--text2); }
.slider-row { display:flex; align-items:center; gap:.75rem; }
input[type=range] { flex:1; -webkit-appearance:none; height:5px; background:var(--border); border-radius:99px; outline:none; }
input[type=range]::-webkit-slider-thumb { -webkit-appearance:none; width:18px; height:18px; background:var(--accent); border-radius:50%; cursor:pointer; }
.slider-val { font-family:'DM Mono',monospace; font-size:.82rem; font-weight:500; color:var(--accent); min-width:28px; text-align:right; }

/* Persons list */
.persons-card { background:var(--surface); border:1px solid var(--border); border-radius:var(--radius-sm); padding:1rem; box-shadow:var(--shadow-sm); max-height:220px; overflow-y:auto; }
.list-title { font-size:.76rem; font-weight:700; letter-spacing:.05em; text-transform:uppercase; color:var(--text2); margin-bottom:.7rem; }
.persons-list { display:flex; flex-direction:column; gap:.4rem; }
.empty-msg { font-size:.82rem; color:var(--text3); text-align:center; }
.person-item { display:flex; align-items:center; gap:.6rem; padding:.4rem .65rem; border-radius:7px; background:var(--surface2); font-size:.8rem; }
.person-color { width:10px; height:10px; border-radius:50%; flex-shrink:0; }
.person-name { font-weight:600; flex:1; }
.person-score { font-family:'DM Mono',monospace; color:var(--text2); }
.person-kp { font-size:.72rem; color:var(--text3); }

/* Comparison table */
.compare-card { background:var(--surface); border:1px solid var(--border); border-radius:var(--radius-sm); padding:1rem; box-shadow:var(--shadow-sm); }
.compare-table { width:100%; border-collapse:collapse; font-size:.8rem; }
.compare-table th { text-align:left; padding:.35rem .5rem; color:var(--text3); font-size:.72rem; letter-spacing:.05em; text-transform:uppercase; border-bottom:1px solid var(--border); }
.compare-table td { padding:.4rem .5rem; border-bottom:1px solid var(--surface2); color:var(--text2); }
.compare-table td:first-child { font-weight:600; color:var(--text); }
.compare-table .good { color:#16a34a; font-weight:600; }
.compare-table .warn { color:#d97706; font-weight:600; }

@media (max-width:900px) { .main-content { grid-template-columns:1fr; } }
@media (max-width:540px) { .app-header { padding:0 1rem; } .main-content { padding:1rem; } }