/* 基础变量 */
:root {
  --bg: #fff;
  --fg: #1f2328;
  --muted: #6b7280;
  --primary: #2563eb;
  --primary-contrast: #ffffff;
  --border: #e5e7eb;
  --card: #f8fafc;
  --shadow: 0 6px 24px rgba(0,0,0,0.08);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0f14;
    --fg: #e5e7eb;
    --muted: #9aa1ab;
    --primary: #4f7dff;
    --primary-contrast: #0b0f14;
    --border: #1f2937;
    --card: #0f1721;
    --shadow: 0 10px 30px rgba(0,0,0,0.35);
  }
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, "SF Pro Text", "Segoe UI", Roboto, "Noto Sans CJK SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
  background: var(--bg);
  color: var(--fg);
}

/* Header */
.app-header {
  padding: 24px 16px 8px;
  text-align: center;
}
.app-header h1 {
  margin: 0;
  font-size: 28px;
  letter-spacing: 0.2px;
}
.subtitle {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 14px;
}

/* Tabs */
.position-tabs {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--bg);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 2px 8px rgba(0,0,0,0.03);
}
.tabs {
  display: flex;
  gap: 8px;
  padding: 10px 12px;
  overflow-x: auto;
}
.tab {
  flex: 0 0 auto;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--card);
  cursor: pointer;
  font-size: 14px;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.tab.active {
  background: var(--primary);
  border-color: var(--primary);
  color: var(--primary-contrast);
}
.tab .badge {
  font-size: 12px;
  padding: 2px 6px;
  border-radius: 999px;
  background: rgba(0,0,0,0.06);
}
.tab.active .badge { background: rgba(255,255,255,0.2); }

/* Main container */
.container {
  max-width: 980px;
  margin: 0 auto;
  padding: 24px 16px 110px; /* leave space for bottom bar */
}

/* Editor */
.editor-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}
.editor h2 { margin: 0; font-size: 20px; }
.editor-actions { display: flex; gap: 8px; }

.btn {
  border: 1px solid var(--border);
  background: var(--card);
  padding: 8px 12px;
  border-radius: 10px;
  font-size: 14px;
  cursor: pointer;
}
.btn:hover { filter: brightness(0.98); }
.btn.primary {
  background: var(--primary);
  color: var(--primary-contrast);
  border-color: var(--primary);
}
.btn.small { padding: 6px 8px; font-size: 13px; }

.icon-btn {
  border: 1px solid var(--border);
  background: transparent;
  padding: 6px 8px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
}

/* Candidate list */
.candidate-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 12px; }
.candidate-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 12px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.candidate-card .row { display: flex; align-items: center; gap: 8px; }
.candidate-card input[type="text"] {
  width: 100%;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--fg);
  border-radius: 10px;
  padding: 10px 12px;
  font-size: 14px;
}
.votes {
  font-size: 13px;
  color: var(--muted);
}
.actions { display: flex; gap: 6px; align-items: center; }
.actions .minus { }
.actions .plus { }
.actions .delete { margin-left: auto; }

.empty {
  padding: 24px;
  text-align: center;
  color: var(--muted);
  border: 1px dashed var(--border);
  border-radius: 12px;
}

/* Bottom bar */
.bottom-bar {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  display: flex;
  gap: 10px;
  align-items: center;
  padding: 12px 14px;
  border-top: 1px solid var(--border);
  background: var(--bg);
  z-index: 8;
}
.bottom-bar .saved-title { color: var(--muted); font-size: 13px; }
.bottom-bar .saved-content { white-space: nowrap; overflow-x: auto; scrollbar-width: thin; }
.badge-result {
  display: inline-flex;
  gap: 6px;
  align-items: center;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--card);
  border: 1px solid var(--border);
  margin-right: 8px;
  font-size: 13px;
}

/* Floating button */
.fab {
  position: fixed;
  right: 16px;
  bottom: 72px;
  border-radius: 999px;
  padding: 12px 16px;
  font-size: 14px;
  border: 1px solid var(--border);
  background: var(--card);
  cursor: pointer;
  box-shadow: var(--shadow);
  z-index: 9;
}

/* Overlay & Modal */
.overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.45);
  backdrop-filter: blur(2px);
  z-index: 100;
}
.hidden { display: none !important; }

.modal {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  z-index: 101;
}
.modal > * {
  width: min(820px, calc(100% - 24px));
  max-height: min(86vh, 900px);
  overflow: auto;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: var(--shadow);
  padding: 16px;
}
.modal-header {
  display: flex; align-items: center; justify-content: space-between;
  position: sticky; top: 0; background: var(--bg);
  padding-bottom: 8px; border-bottom: 1px solid var(--border);
}
.results-body { padding: 12px 2px; }
.results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 12px;
}
.result-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px;
}
.result-card h4 { margin: 0 0 8px; font-size: 15px; }
.result-card .name { font-size: 18px; font-weight: 600; }
.result-card .empty { color: var(--muted); border: none; padding: 0; }

.tie-form { display: grid; gap: 8px; margin: 12px 0; }
.tie-option {
  display: flex; align-items: center; gap: 8px;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px;
  background: var(--card);
}

/* Toast */
.toast {
  position: fixed;
  left: 50%;
  transform: translateX(-50%);
  bottom: 24px;
  background: var(--fg);
  color: var(--bg);
  padding: 10px 14px;
  border-radius: 10px;
  font-size: 14px;
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s ease, transform .2s ease;
  z-index: 200;
}
.toast.show {
  opacity: 0.98;
  transform: translateX(-50%) translateY(-6px);
}