:root {
  --bg: #f6f7fb;
  --card: #ffffff;
  --text: #1a1c23;
  --muted: #6b7280;
  --accent: #4f46e5;
  --accent-text: #ffffff;
  --border: #e5e7eb;
  --danger: #dc2626;
  --shadow: 0 1px 3px rgba(0,0,0,.08);
  --radius: 14px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1117;
    --card: #1a1d27;
    --text: #eceef4;
    --muted: #9aa1af;
    --accent: #818cf8;
    --accent-text: #10122b;
    --border: #2a2e3c;
    --shadow: 0 1px 3px rgba(0,0,0,.4);
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  font-size: 16px;
  line-height: 1.45;
  padding-bottom: env(safe-area-inset-bottom);
  -webkit-tap-highlight-color: transparent;
}

#app { max-width: 640px; margin: 0 auto; min-height: 100dvh; display: flex; flex-direction: column; }

.screen-center {
  min-height: 100dvh; display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 16px; padding: 24px;
}

.spinner {
  width: 32px; height: 32px; border-radius: 50%;
  border: 3px solid var(--border); border-top-color: var(--accent);
  animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- top bar ---------- */
.topbar {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; gap: 8px;
  padding: calc(10px + env(safe-area-inset-top)) 14px 10px;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}
.topbar h1 { font-size: 18px; margin: 0; flex: 1; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.topbar .sub { font-size: 12px; color: var(--muted); }

/* ---------- buttons & inputs ---------- */
button {
  font: inherit; border: none; cursor: pointer; border-radius: 12px;
  padding: 12px 16px; background: var(--accent); color: var(--accent-text);
  font-weight: 600; touch-action: manipulation;
}
button:active { opacity: .85; }
button.secondary { background: var(--card); color: var(--text); border: 1px solid var(--border); }
button.danger { background: transparent; color: var(--danger); border: 1px solid var(--danger); }
button.icon-btn {
  background: transparent; color: var(--text); padding: 8px; border-radius: 10px;
  font-size: 20px; line-height: 1;
}
button:disabled { opacity: .5; cursor: default; }
button.block { width: 100%; }

input[type="text"], input[type="password"], select {
  font: inherit; width: 100%; padding: 12px 14px;
  border: 1px solid var(--border); border-radius: 12px;
  background: var(--card); color: var(--text);
}
input:focus, select:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
label.field { display: block; margin-bottom: 14px; font-weight: 600; font-size: 14px; }
label.field > span { display: block; margin-bottom: 6px; }

.error-msg { color: var(--danger); font-size: 14px; min-height: 20px; margin: 8px 0; }
.hint { color: var(--muted); font-size: 13px; }

/* ---------- login ---------- */
.login-card { width: 100%; max-width: 360px; background: var(--card); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow); }
.login-logo { font-size: 44px; text-align: center; margin-bottom: 4px; }
.login-card h1 { text-align: center; font-size: 20px; margin: 0 0 18px; }

/* ---------- view tabs ---------- */
.tabs {
  display: flex; gap: 8px; overflow-x: auto; padding: 10px 14px;
  scrollbar-width: none;
}
.tabs::-webkit-scrollbar { display: none; }
.tab {
  flex: 0 0 auto; padding: 8px 14px; border-radius: 999px;
  background: var(--card); border: 1px solid var(--border); color: var(--text);
  font-weight: 600; font-size: 14px;
}
.tab.active { background: var(--accent); color: var(--accent-text); border-color: var(--accent); }

/* ---------- day sections ---------- */
main.content { flex: 1; padding: 0 14px 40px; }
.day-section { margin-top: 18px; }
.day-header {
  display: flex; align-items: baseline; gap: 10px;
  position: sticky; top: 47px; background: var(--bg); padding: 6px 0; z-index: 5;
}
.day-header h2 { font-size: 17px; margin: 0; }
.day-header .day-date { color: var(--muted); font-size: 13px; }
.day-header .day-count { margin-left: auto; color: var(--muted); font-size: 13px; }

.event-list { display: flex; flex-direction: column; gap: 8px; margin-top: 6px; }
.event-card {
  display: flex; gap: 12px; background: var(--card); border-radius: var(--radius);
  padding: 12px 14px; box-shadow: var(--shadow); border-left: 4px solid var(--accent);
}
.event-time { flex: 0 0 74px; font-size: 13px; color: var(--muted); font-variant-numeric: tabular-nums; padding-top: 2px; }
.event-time .end { display: block; opacity: .75; }
.event-body { min-width: 0; flex: 1; }
.event-title { font-weight: 600; overflow-wrap: anywhere; }
.event-title.declined { text-decoration: line-through; opacity: .6; }
.event-meta { font-size: 13px; color: var(--muted); display: flex; flex-wrap: wrap; gap: 4px 10px; margin-top: 2px; }
.event-meta a { color: var(--accent); text-decoration: none; }
.cal-chip { display: inline-flex; align-items: center; gap: 5px; }
.cal-dot { width: 9px; height: 9px; border-radius: 50%; flex: 0 0 auto; }
.badge {
  font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: .03em;
  background: var(--border); color: var(--muted); border-radius: 6px; padding: 1px 6px;
}
/* ---------- summary list layout ---------- */
.summary-list {
  background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 8px 12px; margin-top: 6px;
  display: flex; flex-direction: column;
}
.summary-line {
  display: flex; align-items: baseline; gap: 8px;
  padding: 5px 0; font-size: 14px;
  border-bottom: 1px solid var(--border);
}
.summary-line:last-child { border-bottom: none; }
.summary-dot { width: 8px; height: 8px; border-radius: 50%; flex: 0 0 auto; align-self: center; }
.summary-time {
  flex: 0 0 auto; color: var(--muted); font-variant-numeric: tabular-nums;
  white-space: nowrap; min-width: 118px;
}
.summary-title { font-weight: 600; overflow-wrap: anywhere; min-width: 0; }
.summary-line.declined .summary-title { text-decoration: line-through; opacity: .6; }
.summary-line.travel .summary-title { font-weight: 400; font-style: italic; color: var(--muted); }
.summary-line.travel .summary-dot { opacity: .4; }

/* ---------- travel buffer cards ---------- */
.event-card.travel { border-left-style: dashed; background: transparent; box-shadow: none; border: 1px dashed var(--border); border-left: 4px dashed var(--accent); }
.event-card.travel .event-title { font-weight: 400; font-style: italic; color: var(--muted); }

.option-row { border: 1px solid var(--border); border-radius: 12px; }

.empty-day {
  color: var(--muted); font-size: 14px; background: var(--card);
  border: 1px dashed var(--border); border-radius: var(--radius); padding: 14px; text-align: center;
}

/* ---------- forms / editor ---------- */
.panel { background: var(--card); border-radius: var(--radius); padding: 18px; box-shadow: var(--shadow); margin-top: 16px; }
.cal-picker { display: flex; flex-direction: column; gap: 4px; max-height: 45dvh; overflow-y: auto; border: 1px solid var(--border); border-radius: 12px; padding: 6px; }
.cal-row { display: flex; align-items: center; gap: 10px; padding: 10px 8px; border-radius: 10px; }
.cal-row:active { background: var(--bg); }
.cal-row input { width: 20px; height: 20px; flex: 0 0 auto; accent-color: var(--accent); }
.cal-row .cal-name { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.form-actions { display: flex; gap: 10px; margin-top: 18px; }
.form-actions button { flex: 1; }

.center-note { text-align: center; color: var(--muted); padding: 40px 20px; }
.toast {
  position: fixed; bottom: calc(20px + env(safe-area-inset-bottom)); left: 50%;
  transform: translateX(-50%); background: var(--text); color: var(--bg);
  padding: 10px 18px; border-radius: 999px; font-size: 14px; font-weight: 600;
  box-shadow: var(--shadow); z-index: 100; max-width: 90vw;
}

.pull-refresh { text-align: center; padding: 10px; color: var(--muted); font-size: 13px; }