/* ============ Tokens (Airbnb-like, light) ============
   Typography scale: 26/800 page titles · 17/700 card & section titles
   15 body · 13 secondary (one gray) · 12 captions
   Colors: pure black, pure white, one gray, one border gray, pink CTA only.
*/
:root {
  --bg: #ffffff;
  --surface-2: #f7f7f7;
  --surface-3: #ebebeb;
  --text: #000000;
  --muted: #717171;
  --border: #e6e6e6;
  --border-strong: #d4d4d4;
  --pink: #e61e4d;
  --pink-2: #d70466;
  --shadow: 0 1px 2px rgba(0, 0, 0, .08);
  --shadow-hover: 0 6px 20px rgba(0, 0, 0, .12);
  --shadow-lg: 0 8px 28px rgba(0, 0, 0, .18);
  --radius: 16px;
}

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

html, body { height: 100%; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
input, select, textarea { font: inherit; color: inherit; }

#app { max-width: 1080px; margin: 0 auto; padding: 16px 20px 96px; }

.screen { animation: screen-in .35s cubic-bezier(.22, 1, .36, 1); }
@keyframes screen-in {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ============ Island nav ============ */
.island-nav { position: sticky; top: 14px; z-index: 40; margin-bottom: 40px; }
.nav-inner {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 10px 10px 22px;
  border-radius: 99px;
  background: rgba(255, 255, 255, .72);
  -webkit-backdrop-filter: blur(20px) saturate(1.6);
  backdrop-filter: blur(20px) saturate(1.6);
  border: 1px solid var(--border);
  box-shadow: 0 4px 16px rgba(0, 0, 0, .08);
}
.logo {
  font-size: 17px; font-weight: 800; letter-spacing: -.02em;
  display: inline-flex; align-items: baseline; gap: 5px; cursor: pointer; user-select: none;
}
.logo-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--text); align-self: center; margin-top: 4px; }
.nav-inner .spacer { flex: 1; }

/* ============ Buttons ============ */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 10px 18px; border-radius: 99px; font-weight: 600; font-size: 14px;
  background: #fff; color: var(--text);
  border: 1px solid var(--border-strong);
  transition: transform .15s cubic-bezier(.34, 1.56, .64, 1), background .2s, border-color .2s, box-shadow .25s;
  user-select: none; white-space: nowrap;
}
.btn:hover { background: var(--surface-2); border-color: var(--text); }
.btn:active { transform: scale(.96); }

.btn-primary {
  background: linear-gradient(110deg, var(--pink) 0%, var(--pink-2) 50%, var(--pink) 100%);
  background-size: 220% 100%;
  animation: grad-move 4s linear infinite;
  color: #fff; border: none;
  box-shadow: 0 4px 14px rgba(230, 30, 77, .28);
}
.btn-primary:hover { box-shadow: 0 6px 20px rgba(230, 30, 77, .4); }
@keyframes grad-move { to { background-position: -220% 0; } }

.btn-ghost { background: transparent; border-color: transparent; color: var(--muted); }
.btn-ghost:hover { background: var(--surface-2); color: var(--text); border-color: transparent; }
.btn-danger { background: #fff; border-color: var(--border-strong); color: var(--muted); }
.btn-danger:hover { border-color: var(--text); color: var(--text); }
.btn-sm { padding: 8px 14px; font-size: 13px; }

/* segmented control */
.seg { display: inline-flex; border: 1px solid var(--border-strong); border-radius: 99px; padding: 3px; gap: 2px; background: #fff; }
.seg-btn { padding: 6px 14px; border-radius: 99px; font-size: 13px; font-weight: 600; color: var(--muted); transition: all .2s; }
.seg-btn:hover { color: var(--text); }
.seg-btn.active { background: var(--text); color: #fff; }

/* ============ Home ============ */
.home-head { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 24px; }
.home-head h2 { font-size: 26px; letter-spacing: -.02em; margin: 0; flex: 1; }
.home-controls { display: flex; gap: 8px; }

.grid-cards { columns: 320px; column-gap: 16px; }
.card {
  background: #fff; border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  position: relative;
}
.challenge-card {
  cursor: pointer; display: inline-block; width: 100%;
  margin-bottom: 16px; break-inside: avoid; overflow: hidden;
  transition: transform .2s cubic-bezier(.22, 1, .36, 1), box-shadow .25s;
}
.challenge-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); }
.card-cover { width: 100%; overflow: hidden; }
.card-cover img { width: 100%; display: block; }
.card-body { padding: 18px 20px 20px; }
.challenge-card h3 { font-size: 17px; margin-bottom: 3px; letter-spacing: -.01em; }
.challenge-card .meta { font-size: 13px; color: var(--muted); margin-bottom: 12px; }
.challenge-card .card-delete {
  position: absolute; top: 12px; right: 12px; opacity: 0; z-index: 2;
  transition: opacity .2s;
  color: var(--text); font-size: 13px;
  width: 30px; height: 30px; border-radius: 50%;
  background: rgba(255, 255, 255, .92); box-shadow: var(--shadow);
}
.challenge-card:hover .card-delete { opacity: 1; }
.challenge-card .card-delete:hover { background: #fff; transform: scale(1.08); }
.card-actions { display: flex; gap: 8px; margin-top: 14px; }

.new-chip {
  display: inline-block; padding: 4px 10px; margin-bottom: 10px;
  background: var(--text); color: #fff;
  font-size: 12px; font-weight: 600;
  border-radius: 99px;
  animation: tag-pop .35s cubic-bezier(.34, 1.56, .64, 1);
}

/* list view */
.list-rows { display: flex; flex-direction: column; gap: 10px; }
.list-row {
  display: flex; align-items: center; gap: 16px; padding: 14px 18px;
  border: 1px solid var(--border); border-radius: 14px; cursor: pointer;
  background: #fff; box-shadow: var(--shadow);
  transition: transform .15s, box-shadow .2s;
}
.list-row:hover { transform: translateY(-1px); box-shadow: var(--shadow-hover); }
.lr-thumb { width: 48px; height: 48px; border-radius: 10px; object-fit: cover; flex-shrink: 0; }
.lr-main { min-width: 170px; }
.lr-main b { font-size: 15px; }
.lr-meta { font-size: 13px; color: var(--muted); margin-top: 2px; }
.lr-tl { flex: 1; min-width: 120px; }
.lr-status { font-size: 13px; font-weight: 600; white-space: nowrap; }
.list-row .new-chip { margin: 0; }

/* avatars */
.avatar {
  width: 28px; height: 28px; border-radius: 50%;
  display: inline-grid; place-items: center; overflow: hidden;
  background: #fff; border: 1px solid var(--border);
  flex-shrink: 0;
}
.avatar img { width: 100%; height: 100%; display: block; image-rendering: pixelated; }
.avatar-stack { display: flex; align-items: center; margin-bottom: 14px; }
.avatar-stack .avatar {
  width: 32px; height: 32px; border: 2px solid #fff;
  box-shadow: 0 0 0 1px var(--border);
  margin-right: -9px;
}
.avatar-stack .avatar.more {
  background: var(--text); color: #fff; font-size: 12px; font-weight: 600;
  margin-right: 0;
}

/* timeline */
.tl { margin-top: 4px; }
.tl-track { position: relative; height: 4px; background: var(--surface-3); border-radius: 99px; }
.tl-fill {
  position: absolute; left: 0; top: 0; bottom: 0;
  background: var(--text); border-radius: 99px;
  transition: width .8s cubic-bezier(.22, 1, .36, 1);
}
.tl-dot {
  position: absolute; top: 50%; transform: translate(-50%, -50%);
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--text); border: 2px solid #fff;
  box-shadow: 0 0 0 1px var(--border-strong);
}
.tl-row {
  display: flex; justify-content: space-between; align-items: baseline;
  margin-top: 8px; font-size: 12px; color: var(--muted);
}
.tl-status { color: var(--text); font-weight: 600; }

.empty-state { text-align: center; padding: 80px 20px; color: var(--muted); font-size: 15px; line-height: 1.7; }

/* ============ Create form ============ */
.form-card { max-width: 620px; margin: 0 auto; padding: 28px; }
.form-section { margin-bottom: 28px; }
.form-label { display: block; font-size: 13px; font-weight: 600; color: var(--muted); margin-bottom: 10px; }
.f-sub { font-size: 13px; color: var(--muted); margin-bottom: 6px; }
.hint { font-size: 13px; color: var(--muted); margin-top: 10px; line-height: 1.5; }

.input, textarea.input {
  width: 100%; padding: 12px 14px; border-radius: 12px;
  border: 1px solid var(--border-strong); background: #fff;
  transition: border-color .2s, box-shadow .2s;
  outline: none; font-size: 15px; color: var(--text);
}
.input::placeholder { color: var(--muted); }
.input:focus { border-color: var(--text); box-shadow: 0 0 0 1px var(--text); }
.input[readonly] { color: var(--muted); cursor: default; }

/* combined date range field */
.range-field {
  display: flex; align-items: stretch;
  border: 1px solid var(--border-strong); border-radius: 99px;
  background: #fff; cursor: pointer; overflow: hidden;
  transition: border-color .2s, box-shadow .2s;
}
.range-field:hover { border-color: var(--text); }
.range-field.open { border-color: var(--text); box-shadow: 0 0 0 1px var(--text); }
.rf-half { flex: 1; padding: 12px 22px; transition: background .2s; }
.rf-half:hover { background: var(--surface-2); }
.rf-cap { display: block; font-size: 12px; font-weight: 700; }
.rf-val { display: block; font-size: 14px; color: var(--muted); margin-top: 2px; }
.rf-sep { width: 1px; background: var(--border); margin: 8px 0; }

.range-panel {
  margin-top: 10px; padding: 18px;
  border: 1px solid var(--border); border-radius: 16px;
  background: #fff; box-shadow: var(--shadow-lg);
  animation: pop-in .25s cubic-bezier(.34, 1.56, .64, 1);
  transform-origin: top center;
}

.date-field { position: relative; }
.input-date { cursor: pointer; color-scheme: light; }
.input-date::-webkit-calendar-picker-indicator {
  opacity: .2; transition: opacity .25s; cursor: pointer; padding: 4px;
}
.date-field:hover .input-date::-webkit-calendar-picker-indicator,
.input-date:hover::-webkit-calendar-picker-indicator,
.input-date:focus::-webkit-calendar-picker-indicator { opacity: 1; }
.date-field:hover .input-date { border-color: var(--text); }

/* cover upload */
.cover-row { display: flex; align-items: center; gap: 12px; }
.cover-preview {
  width: 96px; height: 72px; border-radius: 12px; overflow: hidden;
  border: 1px solid var(--border-strong);
  animation: tag-pop .3s cubic-bezier(.34, 1.56, .64, 1);
}
.cover-preview img { width: 100%; height: 100%; object-fit: cover; display: block; }
.cover-add {
  width: 100%; padding: 16px; border-radius: 12px;
  border: 1.5px dashed var(--border-strong); color: var(--muted);
  font-weight: 600; font-size: 14px;
  transition: border-color .2s, color .2s, background .2s;
}
.cover-add:hover { border-color: var(--text); color: var(--text); background: var(--surface-2); }

.chip-row { display: flex; gap: 8px; flex-wrap: wrap; }
.chip {
  padding: 9px 16px; border-radius: 99px; font-size: 14px; font-weight: 600;
  background: #fff; color: var(--muted);
  transition: all .2s cubic-bezier(.34, 1.56, .64, 1);
  border: 1px solid var(--border-strong);
}
.chip:hover { transform: translateY(-2px); color: var(--text); border-color: var(--text); }
.chip.selected { background: var(--text); color: #fff; border-color: var(--text); }
.chip-day { width: 44px; padding: 9px 0; text-align: center; }

.row-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }

.participant-tags { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 12px; }
.p-tag {
  display: inline-flex; align-items: center; gap: 8px; padding: 6px 10px 6px 6px;
  background: #fff; border: 1px solid var(--border-strong); border-radius: 99px;
  font-size: 14px; font-weight: 600;
  animation: tag-pop .3s cubic-bezier(.34, 1.56, .64, 1);
}
@keyframes tag-pop { from { transform: scale(.5); opacity: 0; } to { transform: scale(1); opacity: 1; } }
.p-tag .x { color: var(--muted); padding: 0 4px; font-size: 14px; }
.p-tag .x:hover { color: var(--text); }
.team-mark {
  display: inline-grid; place-items: center;
  width: 18px; height: 18px; border-radius: 50%;
  background: var(--surface-3); color: var(--text);
  font-size: 10px; font-weight: 700;
}

.invite-link-row { display: flex; gap: 8px; }
.invite-link-row .input { flex: 1; font-size: 13px; }

/* ============ Challenge view ============ */
.challenge-head { display: flex; align-items: flex-start; gap: 16px; margin-bottom: 22px; flex-wrap: wrap; }
.challenge-head h1 { font-size: 26px; letter-spacing: -.02em; }
.challenge-head .sub { color: var(--muted); font-size: 13px; margin-top: 5px; }
.challenge-head .head-actions { margin-left: auto; display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }

.badge {
  width: 56px; height: 56px; border-radius: 16px; overflow: hidden;
  background: var(--surface-2); border: 1px solid var(--border);
  display: grid; place-items: center;
  font-weight: 800; font-size: 22px; color: var(--muted);
  flex-shrink: 0;
}
.badge img { width: 100%; height: 100%; object-fit: cover; }

.ring-wrap { position: relative; width: 64px; height: 64px; flex-shrink: 0; }
.ring-wrap svg { transform: rotate(-90deg); }
.ring-bg { fill: none; stroke: var(--surface-3); stroke-width: 5; }
.ring-fg {
  fill: none; stroke: var(--text); stroke-width: 5; stroke-linecap: round;
  transition: stroke-dashoffset 1s cubic-bezier(.22, 1, .36, 1);
}
.ring-label { position: absolute; inset: 0; display: grid; place-items: center; font-size: 13px; font-weight: 700; }

.streak-pill {
  display: inline-flex; align-items: center; gap: 6px; padding: 9px 16px;
  background: var(--text); color: #fff; border-radius: 99px; font-weight: 600; font-size: 13px;
}
.streak-pill.cold { background: var(--surface-2); color: var(--muted); }

.tabs { display: flex; gap: 6px; margin-bottom: 22px; }
.tab {
  padding: 9px 20px; border-radius: 99px; font-weight: 600; font-size: 14px; color: var(--muted);
  border: 1px solid var(--border-strong); background: #fff;
  transition: all .25s cubic-bezier(.22, 1, .36, 1);
}
.tab:hover { border-color: var(--text); color: var(--text); }
.tab.active { background: var(--text); color: #fff; border-color: var(--text); }

/* today CTA */
.today-cta {
  display: flex; align-items: center; gap: 14px; padding: 18px 22px;
  background: #fff; border: 1px solid var(--border);
  border-radius: var(--radius); margin-bottom: 22px;
  box-shadow: var(--shadow);
}
.today-cta .cta-text { flex: 1; }
.today-cta .cta-text b { font-size: 16px; }
.today-cta .cta-text div { font-size: 13px; color: var(--muted); margin-top: 3px; }
.today-cta.done-state { border-color: var(--text); }

.btn-checkin {
  background: linear-gradient(110deg, var(--pink) 0%, var(--pink-2) 50%, var(--pink) 100%);
  background-size: 220% 100%;
  animation: grad-move 4s linear infinite, cta-pulse 2.4s infinite;
  color: #fff; font-weight: 700; padding: 12px 24px;
  border-radius: 99px; font-size: 15px;
  transition: transform .15s cubic-bezier(.34, 1.56, .64, 1);
}
.btn-checkin:hover { transform: scale(1.05); }
.btn-checkin:active { transform: scale(.94); }
@keyframes cta-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(230, 30, 77, .35); }
  50% { box-shadow: 0 0 0 12px rgba(230, 30, 77, 0); }
}

/* ============ Week calendar (no horizontal scroll) ============ */
.cal-wrap {
  background: #fff; border-radius: var(--radius); border: 1px solid var(--border);
  overflow: hidden; box-shadow: var(--shadow);
}
.cal-nav { display: flex; align-items: center; gap: 10px; padding: 14px 16px; border-bottom: 1px solid var(--border); }
.cal-range { font-weight: 700; font-size: 15px; }
.cal-nav .spacer { flex: 1; }
.nav-arrow {
  width: 32px; height: 32px; border-radius: 50%;
  border: 1px solid var(--border-strong);
  display: grid; place-items: center; font-size: 13px;
  transition: border-color .2s, background .2s, transform .15s;
}
.nav-arrow:hover:not(:disabled) { border-color: var(--text); background: var(--surface-2); }
.nav-arrow:active:not(:disabled) { transform: scale(.92); }
.nav-arrow:disabled { opacity: .3; cursor: default; }

.cal-table { border-collapse: separate; border-spacing: 0; width: 100%; table-layout: fixed; }
.cal-table th, .cal-table td { padding: 0; }
.cal-table col.name-c { width: 180px; }

.cal-table thead th {
  font-size: 12px; font-weight: 600; color: var(--muted); text-align: center;
  padding: 10px 0 8px; border-bottom: 1px solid var(--border);
}
.cal-table thead th .dnum { display: block; font-size: 15px; font-weight: 700; color: var(--text); margin-top: 2px; }
.cal-table thead th.today-col .dnum {
  color: #fff; background: var(--text);
  width: 26px; height: 26px; line-height: 26px;
  border-radius: 50%; margin: 2px auto 0;
}

.cal-table .name-col {
  text-align: left; padding: 8px 16px 8px 14px;
  border-right: 1px solid var(--border); border-bottom: 1px solid var(--border);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.name-cell { display: flex; align-items: center; gap: 10px; font-size: 14px; font-weight: 600; }
.name-cell .mini-streak { font-size: 12px; color: var(--muted); font-weight: 400; }

.cal-table tbody td { border-bottom: 1px solid var(--border); }
.cal-table tbody tr:last-child td { border-bottom: none; }
.cal-table tbody tr.me-row { background: var(--surface-2); }
.cal-table tbody tr.me-row .name-col { background: var(--surface-2); }
.team-head td {
  background: var(--surface-2); font-weight: 700; font-size: 13px;
  padding: 8px 14px; border-bottom: 1px solid var(--border);
}
.team-head .team-pct { color: var(--muted); font-weight: 400; }

.day-cell { height: 52px; text-align: center; position: relative; }
.day-cell.today-col { background: rgba(0, 0, 0, .04); }

.mark {
  width: 32px; height: 32px; border-radius: 10px; margin: 0 auto;
  display: grid; place-items: center; font-size: 14px; position: relative;
  transition: transform .15s cubic-bezier(.34, 1.56, .64, 1), background .2s, box-shadow .2s;
}
.mark.clickable { cursor: pointer; }
.mark.clickable:hover { transform: scale(1.15); box-shadow: var(--shadow-hover); }
.mark.clickable:active { transform: scale(.9); }
.mark.empty { background: var(--surface-2); }
.mark.empty.required-day { box-shadow: inset 0 0 0 1px var(--border-strong); background: #fff; }
.mark.done { background: var(--text); color: #fff; font-weight: 700; }
.mark.missed { background: var(--surface-2); color: var(--muted); font-size: 11px; }
.mark.frozen { background: #fff; box-shadow: inset 0 0 0 1px var(--border-strong); color: var(--text); font-size: 14px; }
.mark.future { background: transparent; box-shadow: inset 0 0 0 1px var(--border); opacity: .6; }
.mark.off-day { background: transparent; opacity: .3; }
.mark.off-day::after { content: "·"; color: var(--muted); }
.mark.out { visibility: hidden; }

.mark.just-checked { animation: check-pop .5s cubic-bezier(.34, 1.56, .64, 1); }
@keyframes check-pop {
  0% { transform: scale(0) rotate(-30deg); }
  60% { transform: scale(1.35) rotate(6deg); }
  100% { transform: scale(1) rotate(0); }
}
.mark.just-checked::before {
  content: ""; position: absolute; inset: -4px; border-radius: 14px;
  border: 2px solid var(--text); animation: ring-out .6s ease-out forwards;
}
@keyframes ring-out {
  from { transform: scale(.7); opacity: 1; }
  to   { transform: scale(1.8); opacity: 0; }
}
.mark .tick { display: inline-block; }
.mark.just-checked .tick { animation: tick-draw .4s .1s both; }
@keyframes tick-draw {
  from { transform: scale(0) rotate(-45deg); opacity: 0; }
  to   { transform: scale(1) rotate(0); opacity: 1; }
}

.mark .c-dot {
  position: absolute; top: -3px; right: -3px; width: 10px; height: 10px;
  background: var(--text);
  border-radius: 50%; border: 2px solid #fff;
  animation: tag-pop .3s cubic-bezier(.34, 1.56, .64, 1);
}
.mark.done .c-dot { background: #fff; border-color: var(--text); }

.cal-legend { display: flex; gap: 16px; flex-wrap: wrap; align-items: center; padding: 12px 16px; border-top: 1px solid var(--border); font-size: 13px; color: var(--muted); }
.cal-legend .li { display: inline-flex; align-items: center; gap: 7px; }
.cal-legend .sw { width: 16px; height: 16px; border-radius: 6px; display: inline-grid; place-items: center; font-size: 9px; }
.cal-legend .sw-done { background: var(--text); color: #fff; font-weight: 700; }
.cal-legend .sw-missed { background: var(--surface-2); color: var(--muted); }
.cal-legend .sw-frozen { background: #fff; box-shadow: inset 0 0 0 1px var(--border-strong); color: var(--text); }
.cal-legend .sw-comment { background: var(--text); border-radius: 50%; width: 10px; height: 10px; }

/* ============ Popover ============ */
#popover-layer { position: fixed; inset: 0; z-index: 50; pointer-events: none; }
.popover {
  position: absolute; pointer-events: auto; width: 264px;
  background: #fff; border-radius: 14px; box-shadow: var(--shadow-lg);
  border: 1px solid var(--border); padding: 14px;
  animation: pop-in .25s cubic-bezier(.34, 1.56, .64, 1);
  transform-origin: top center;
}
@keyframes pop-in {
  from { transform: scale(.8) translateY(-6px); opacity: 0; }
  to   { transform: scale(1) translateY(0); opacity: 1; }
}
.popover .pop-title { font-weight: 600; font-size: 14px; margin-bottom: 4px; display: flex; align-items: center; gap: 8px; }
.popover .pop-date { font-size: 12px; color: var(--muted); margin-bottom: 10px; }
.popover textarea {
  width: 100%; min-height: 60px; resize: vertical; border-radius: 10px;
  border: 1px solid var(--border-strong); padding: 9px 11px; font-size: 13px;
  outline: none; background: #fff; margin-bottom: 10px; color: var(--text);
  transition: border-color .2s;
}
.popover textarea::placeholder { color: var(--muted); }
.popover textarea:focus { border-color: var(--text); }
.popover .pop-actions { display: flex; gap: 8px; }
.popover .pop-actions .btn { flex: 1; }
.popover .pop-comment-view {
  background: var(--surface-2); padding: 10px 12px; border-radius: 10px;
  font-size: 13px; margin-bottom: 10px; line-height: 1.45;
}

/* ============ Stats ============ */
.stat-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 14px; margin-bottom: 20px; }
.stat-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); }
.stat-card .s-value { font-size: 34px; font-weight: 800; letter-spacing: -.02em; line-height: 1; }
.stat-card .s-label { font-size: 13px; color: var(--muted); margin-top: 10px; }

.board { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; margin-bottom: 20px; box-shadow: var(--shadow); }
.board h3 { font-size: 17px; margin-bottom: 16px; }
.board-row { display: flex; align-items: center; gap: 12px; padding: 10px 0; animation: row-in .4s cubic-bezier(.22,1,.36,1) both; }
.board-row:nth-child(2) { animation-delay: .05s; } .board-row:nth-child(3) { animation-delay: .1s; }
.board-row:nth-child(4) { animation-delay: .15s; } .board-row:nth-child(5) { animation-delay: .2s; }
.board-row:nth-child(6) { animation-delay: .25s; }
@keyframes row-in { from { opacity: 0; transform: translateX(-12px); } to { opacity: 1; transform: none; } }
.board-row .place { width: 26px; font-weight: 700; color: var(--muted); font-size: 14px; text-align: center; }
.board-row .place.first {
  color: #fff; background: var(--text);
  border-radius: 50%; width: 24px; height: 24px; line-height: 24px; font-size: 13px;
}
.board-row .b-name { min-width: 130px; font-weight: 600; font-size: 14px; display: flex; align-items: center; gap: 8px; }
.board-row .b-track { flex: 1; }
.board-row .b-pct { width: 48px; text-align: right; font-weight: 600; font-size: 14px; }
.board-row .b-streak { width: 84px; text-align: right; font-size: 13px; color: var(--muted); }

.progress-track { height: 6px; background: var(--surface-3); border-radius: 99px; overflow: hidden; }
.progress-fill { height: 100%; border-radius: 99px; background: var(--text); transition: width .8s cubic-bezier(.22, 1, .36, 1); }

/* ============ Chat ============ */
.chat-wrap {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  display: flex; flex-direction: column; height: 500px; box-shadow: var(--shadow);
  overflow: hidden;
}
.chat-scroll { flex: 1; overflow-y: auto; padding: 20px; display: flex; flex-direction: column; gap: 4px; }
.chat-empty { margin: auto; color: var(--muted); font-size: 14px; }
.msg {
  display: flex; gap: 10px; align-items: flex-end; max-width: 78%;
  margin-top: 10px;
  animation: msg-in .3s cubic-bezier(.34, 1.56, .64, 1);
}
@keyframes msg-in { from { transform: translateY(10px) scale(.95); opacity: 0; } to { transform: none; opacity: 1; } }
.msg.mine { align-self: flex-end; flex-direction: row-reverse; }
.msg .bubble {
  background: var(--surface-2); border-radius: 16px 16px 16px 4px;
  padding: 9px 14px; font-size: 14px; line-height: 1.45;
}
.msg.mine .bubble { background: var(--text); color: #fff; border-radius: 16px 16px 4px 16px; }
.msg-name { font-size: 12px; font-weight: 600; color: var(--muted); margin-bottom: 2px; }
.msg-time { font-size: 11px; color: var(--muted); margin-top: 3px; text-align: right; }
.msg.mine .msg-time { color: rgba(255, 255, 255, .55); }
.chat-input-row { display: flex; gap: 10px; padding: 12px; border-top: 1px solid var(--border); }
.chat-input-row .input { flex: 1; border-radius: 99px; }

/* ============ Modal ============ */
.modal-backdrop {
  position: fixed; inset: 0; background: rgba(0, 0, 0, .4); z-index: 100;
  display: grid; place-items: center; padding: 20px;
  animation: fade-in .2s ease;
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
}
@keyframes fade-in { from { opacity: 0; } to { opacity: 1; } }
.modal {
  background: #fff; border: 1px solid var(--border);
  border-radius: 20px; padding: 26px; width: 100%; max-width: 440px;
  box-shadow: var(--shadow-lg);
  animation: modal-in .3s cubic-bezier(.34, 1.56, .64, 1);
}
@keyframes modal-in { from { transform: scale(.85) translateY(20px); opacity: 0; } to { transform: none; opacity: 1; } }
.modal h3 { font-size: 17px; margin-bottom: 6px; }
.modal .m-sub { font-size: 13px; color: var(--muted); margin-bottom: 18px; line-height: 1.5; }
.modal .invite-link-row { margin-bottom: 18px; }

/* ============ Toast ============ */
#toast-container {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%);
  z-index: 200; display: flex; flex-direction: column; gap: 8px; align-items: center;
  pointer-events: none;
}
.toast {
  background: var(--text); color: #fff; padding: 12px 22px; border-radius: 99px;
  font-weight: 600; font-size: 14px; box-shadow: var(--shadow-lg);
  display: flex; align-items: center; gap: 8px;
  animation: toast-in .4s cubic-bezier(.34, 1.56, .64, 1);
}
.toast.fun { animation: toast-bounce .6s cubic-bezier(.34, 1.8, .64, 1); }
.toast .t-emoji { display: inline-block; font-size: 17px; animation: emoji-pop .7s cubic-bezier(.34, 2, .64, 1); }
@keyframes toast-bounce {
  0% { transform: translateY(46px) scale(.5) rotate(-5deg); opacity: 0; }
  60% { transform: translateY(-7px) scale(1.06) rotate(2deg); opacity: 1; }
  100% { transform: none; opacity: 1; }
}
@keyframes emoji-pop {
  0% { transform: scale(0) rotate(-40deg); }
  55% { transform: scale(1.5) rotate(12deg); }
  100% { transform: scale(1) rotate(0); }
}
.toast.leaving { animation: toast-out .3s ease forwards; }
@keyframes toast-in { from { transform: translateY(30px) scale(.8); opacity: 0; } to { transform: none; opacity: 1; } }
@keyframes toast-out { to { transform: translateY(20px); opacity: 0; } }

#confetti-canvas { position: fixed; inset: 0; pointer-events: none; z-index: 300; }

/* helpers */
.muted { color: var(--muted); }
.mb-16 { margin-bottom: 16px; }
h2.page-title { font-size: 26px; letter-spacing: -.02em; margin-bottom: 24px; }

@media (max-width: 640px) {
  #app { padding: 12px 12px 72px; }
  .challenge-head h1 { font-size: 20px; }
  .row-2 { grid-template-columns: 1fr; }
  .nav-inner { padding: 8px 8px 8px 16px; }
  .logo { font-size: 15px; }
  .cal-table col.name-c { width: 110px; }
  .lr-tl { display: none; }
}