:root {
  --bg-deep: #0b1628;
  --bg-panel: rgba(15, 28, 55, 0.92);
  --bg-card: rgba(22, 40, 72, 0.68);
  --border: rgba(255,255,255,0.06);
  --text-primary: #E4ECF5;
  --text-secondary: #8D9FBC;
  --text-muted: #566B8A;

  /* Timer functional colors (green=on-time, yellow=warn, red=overtime) */
  --green: #3B9E5E;
  --green-glow: rgba(59,158,94,0.30);
  --yellow: #E5A010;
  --yellow-glow: rgba(229,160,16,0.30);
  --red: #EF4444;
  --red-glow: rgba(239,68,68,0.50);

  /* UI accent — sophisticated blue */
  --accent: #5B9BD5;
  --accent-glow: rgba(91,155,213,0.25);
  --blue: #7CB8E8;

  --radius: 12px;
  --panel-blur: 18px;
}

* { margin:0; padding:0; box-sizing:border-box; }
body {
  font-family: 'PingFang SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: radial-gradient(ellipse at 50% 20%, #152240 0%, #0b1628 50%, #060f1e 100%);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ========== Background ambient ========== */
.bg-ambient {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background:
    radial-gradient(ellipse at 50% 0%, rgba(91,155,213,0.06) 0%, transparent 55%),
    radial-gradient(ellipse at 20% 80%, rgba(124,184,232,0.04) 0%, transparent 45%),
    radial-gradient(ellipse at 85% 70%, rgba(180,150,80,0.015) 0%, transparent 45%);
}

/* ========== Common Components ========== */
.btn {
  padding: 10px 22px; border-radius: 8px; font-size: 14px; font-weight: 600;
  border: none; cursor: pointer; transition: all .2s; outline: none;
  display: inline-flex; align-items: center; gap: 6px;
}
.btn-primary {
  background: linear-gradient(135deg, #3B7DB8, #2E6596);
  color: var(--text-primary); box-shadow: 0 0 22px var(--accent-glow);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 0 32px var(--accent-glow); }
.btn-outline {
  background: transparent; border: 1px solid rgba(255,255,255,0.15); color: var(--text-primary);
}
.btn-outline:hover { border-color: var(--accent); background: rgba(91,155,213,0.08); }
.btn-danger {
  background: transparent; border: 1px solid rgba(239,68,68,0.3); color: var(--red);
}
.btn-danger:hover { background: rgba(239,68,68,0.1); }
.btn-sm { font-size: 12px; padding: 4px 10px; }
.btn-lg { padding: 14px 36px; font-size: 16px; border-radius: 12px; }
.btn-block { width: 100%; justify-content: center; }

/* ========== Modal ========== */
.modal-overlay {
  display: none; position: fixed; inset: 0; z-index: 100;
  background: rgba(0,0,0,0.7); justify-content: center; align-items: center;
}
.modal-overlay.show { display: flex; }
.modal {
  background: rgba(14, 24, 48, 0.96); backdrop-filter: blur(24px);
  border: 1px solid var(--border); border-radius: 16px;
  padding: 32px; max-width: 420px; width: 90%; text-align: center;
}
.modal h3 { font-size: 20px; margin-bottom: 12px; }
.modal p { color: var(--text-secondary); margin-bottom: 24px; font-size: 14px; }
.modal-actions { display: flex; gap: 12px; justify-content: center; }
.modal-wide { max-width: 520px !important; }

/* ========== Cards ========== */
.card {
  background: var(--bg-panel); backdrop-filter: blur(var(--panel-blur));
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 28px; margin-bottom: 20px;
}
.card h2 {
  font-size: 18px; font-weight: 600; margin-bottom: 16px;
  display: flex; align-items: center; gap: 8px;
}
.card h2::before { content:''; width:4px; height:18px; background:var(--accent); border-radius:2px; }

/* ========== Inputs ========== */
.input-group { display: flex; gap: 12px; margin-bottom: 12px; flex-wrap: wrap; }
.input-group input, .input-group select {
  background: rgba(10,10,25,0.7); border: 1px solid rgba(255,255,255,0.08);
  border-radius: 8px; color: var(--text-primary); padding: 10px 14px;
  font-size: 14px; outline: none; transition: border .2s;
}
.input-group input:focus, .input-group select:focus {
  border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow);
}
.input-group input { width: 140px; }
.input-group select { width: 160px; }
.input-group input.time-inp { width: 80px; }
.input-group label { display:flex; align-items:center; gap:4px; color:var(--text-secondary); font-size:13px; }

/* ========== Segment Card ========== */
.segment-card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: 10px;
  padding: 18px 20px 18px 38px; margin-bottom: 10px; position: relative;
  transition: border .2s, box-shadow .2s, opacity .2s;
}
.segment-card:hover { border-color: rgba(255,255,255,0.15); }
.segment-card .row { display:flex; gap:10px; align-items:center; flex-wrap:wrap; margin-bottom:8px; }
.segment-card .row:last-child { margin-bottom:0; }
.seg-time-label { font-size:12px; color:var(--text-muted); min-width:32px; }
.seg-time-inp { width:64px !important; text-align:center; }
.seg-drag-handle {
  position: absolute; top: 50%; left: 10px; transform: translateY(-50%);
  width: 18px; height: 28px;
  display: flex; align-items: center; justify-content: center;
  cursor: grab; color: var(--text-muted);
  font-size: 16px; line-height: 1;
  user-select: none; opacity: 0.35;
  transition: opacity .15s, color .15s;
}
.seg-drag-handle:hover { opacity: 1; color: var(--accent); }
.seg-drag-handle:active { cursor: grabbing; }
.segment-card.dragging { opacity: 0.4; border-style: dashed; }
.segment-card.drag-over { border-color: var(--accent); border-style: dashed; box-shadow: 0 0 0 2px rgba(91,155,213,0.2); }
.seg-delete {
  position: absolute; top: 10px; right: 14px;
  background: none; border: none; color: var(--text-muted);
  cursor: pointer; font-size: 18px; padding: 4px 8px; border-radius: 6px;
  transition: all .2s;
}
.seg-delete:hover { color: var(--red); background: rgba(239,68,68,0.1); }
.seg-sort-btns {
  position: absolute; top: 10px; right: 44px; display: flex; flex-direction: column; gap: 2px;
}
.seg-sort-btn {
  background: rgba(255,255,255,0.06); border: 1px solid var(--border); color: var(--text-muted);
  cursor: pointer; font-size: 10px; padding: 1px 5px; border-radius: 3px;
  line-height: 1; transition: all .15s;
}
.seg-sort-btn:hover { color: var(--blue); border-color: var(--blue); background: rgba(59,130,246,0.12); }
.seg-type-badge {
  display: inline-block; padding: 2px 8px; border-radius: 4px;
  font-size: 11px; font-weight: 600; letter-spacing: .5px;
  background: rgba(59,130,246,0.15); color: #60A5FA;
}
.seg-type-badge.tabletopics { background: rgba(234,179,8,0.15); color: #FBBF24; }

.template-btns { display: flex; gap: 10px; margin-top: 16px; flex-wrap: wrap; }
.config-actions { display: flex; gap: 12px; margin-top: 28px; justify-content: center; }

.saved-tpl-list { margin: 12px 0 18px; text-align: left; max-height: 180px; overflow-y: auto; }
.saved-tpl-item {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 12px; border-radius: 8px; margin-bottom: 4px;
  background: rgba(255,255,255,0.04); transition: background 0.2s;
}
.saved-tpl-item:hover { background: rgba(255,255,255,0.08); }
.saved-tpl-name { color: var(--blue); cursor: pointer; font-weight: 600; font-size: 14px; }
.saved-tpl-name:hover { text-decoration: underline; }

/* ========== Report Common ========== */
.stats-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-bottom: 28px; }
.stat-card {
  background: var(--bg-panel); backdrop-filter: blur(var(--panel-blur));
  border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; text-align: center;
}
.stat-value { font-size: 28px; font-weight: 800; font-family: monospace; }
.stat-label { font-size: 12px; color: var(--text-muted); margin-top: 4px; text-transform: uppercase; letter-spacing: 1px; }
.stat-value.green { color: var(--green); }
.stat-value.yellow { color: var(--yellow); }
.stat-value.red { color: var(--red); }

.report-section {
  background: var(--bg-panel); backdrop-filter: blur(var(--panel-blur));
  border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; margin-bottom: 20px;
}
.report-section h3 { font-size: 16px; font-weight: 600; margin-bottom: 16px; }
.chart-wrap { position: relative; width: 100%; max-height: 350px; }
.chart-wrap canvas { width: 100% !important; }

.report-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.report-table th {
  text-align: left; padding: 10px 14px; color: var(--text-muted); font-weight: 600;
  font-size: 11px; text-transform: uppercase; letter-spacing: 1px;
  border-bottom: 1px solid var(--border);
}
.report-table td { padding: 10px 14px; border-bottom: 1px solid rgba(255,255,255,0.04); }
.badge {
  display: inline-block; padding: 3px 10px; border-radius: 4px; font-size: 11px; font-weight: 700;
}
.badge.green { background: rgba(34,197,94,0.15); color: var(--green); }
.badge.yellow { background: rgba(234,179,8,0.15); color: var(--yellow); }
.badge.red { background: rgba(239,68,68,0.15); color: var(--red); }

.report-actions { display: flex; gap: 12px; justify-content: center; margin-top: 28px; flex-wrap: wrap; }

.chart-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 24px; }
.chart-card {
  background: rgba(255,255,255,0.03); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px;
}
.chart-card h4 { font-size: 14px; color: var(--text-secondary); margin-bottom: 12px; }
.chart-card .chart-wrap { max-height: 280px; }
.chart-full { grid-column: 1 / -1; }

/* ========== History ========== */
.history-section { margin-top: 40px; }
.history-item {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 18px; background: var(--bg-card); border-radius: 10px;
  margin-bottom: 8px; cursor: pointer; border: 1px solid transparent;
  transition: all .2s;
}
.history-item:hover { border-color: rgba(255,255,255,0.12); }
.history-name { font-weight: 600; }
.history-date { font-size: 12px; color: var(--text-muted); }
.history-meta { text-align: right; }
.history-meta .count { font-size: 12px; color: var(--text-secondary); }

/* ========== Responsive ========== */
@media (max-width: 900px) {
  .chart-grid { grid-template-columns: 1fr; }
  .stats-row { grid-template-columns: repeat(2, 1fr); }
}