/* /streak — page-specific styles.
 *
 * Visual idiom mirrors trends.css: warm cream surface, deep-teal
 * accents, soft shadows, rounded corners. Tokens come from main.css.
 *
 * Surfaces:
 *   - .streak-stats         hero stat row (3 tiles)
 *   - .streak-freeze-card   "use a freeze token" CTA
 *   - .streak-calendar      90-day grid
 *   - .streak-achievements  badge grid (12 rows × 3 wide)
 *   - .streak-leaderboard   weekly preview
 */

/* Page shell ------------------------------------------------------- */

.streak-page {
  position: relative;
  isolation: isolate;
  min-height: 100vh;
  padding: 116px 0 80px;
  overflow: hidden;
}
.streak-page::before,
.streak-page::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.40;
  z-index: -1;
  pointer-events: none;
}
.streak-page::before {
  width: 520px; height: 520px; top: -160px; left: -180px;
  background: radial-gradient(circle, rgba(116, 199, 186, 0.55), transparent 70%);
}
.streak-page::after {
  width: 600px; height: 600px; top: 80px; right: -240px;
  background: radial-gradient(circle, rgba(242, 169, 59, 0.35), transparent 70%);
}

.streak-shell {
  width: min(880px, calc(100% - 2.5rem));
  margin: 0 auto;
  display: grid;
  gap: 22px;
}

/* Hero ------------------------------------------------------------- */

.streak-hero { text-align: center; padding: 8px 0 4px; }
.streak-hero .pill {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(14, 132, 121, 0.10);
  color: var(--teal-700);
  border-radius: var(--r-full);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}
.streak-hero h1 {
  font-size: clamp(2.2rem, 4.8vw, 3.2rem);
  line-height: 1.05;
  margin: 0 0 0.8rem;
  letter-spacing: -0.02em;
  color: var(--ink);
}
.streak-hero .lede {
  max-width: 34rem;
  margin: 0 auto;
  color: var(--ink-3);
  font-size: 1.08rem;
  line-height: 1.5;
}

/* Card primitive --------------------------------------------------- */

.streak-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: clamp(20px, 3.2vw, 28px);
  box-shadow: var(--shadow-sm);
}
.streak-card h2 {
  font-size: 1.05rem;
  margin: 0 0 0.4rem;
  color: var(--ink);
  letter-spacing: -0.005em;
}
.streak-card-sub {
  margin: 0 0 1rem;
  color: var(--ink-4);
  font-size: 0.88rem;
  line-height: 1.5;
}
.streak-card-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 4px;
}
.streak-card-meta {
  font-size: 0.82rem;
  color: var(--ink-4);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
}

/* Hero stat row ---------------------------------------------------- */

.streak-stats {
  display: grid;
  gap: 12px;
  grid-template-columns: 1fr;
}
@media (min-width: 540px) {
  .streak-stats { grid-template-columns: repeat(3, 1fr); }
}

.streak-stat {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 18px 20px;
  box-shadow: var(--shadow-xs);
  display: grid;
  gap: 4px;
}
.streak-stat-primary {
  background: linear-gradient(140deg, var(--teal-500) 0%, var(--teal-700) 100%);
  color: white;
  border: 0;
  box-shadow: 0 12px 30px rgba(7, 86, 79, 0.16);
}
.streak-stat-tokens {
  background: linear-gradient(140deg, #1F6FB7 0%, #094B82 100%);
  color: white;
  border: 0;
  box-shadow: 0 12px 30px rgba(9, 75, 130, 0.16);
}
.streak-stat-label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
  color: var(--ink-4);
}
.streak-stat-primary .streak-stat-label,
.streak-stat-tokens .streak-stat-label { color: rgba(255,255,255,0.8); }

.streak-stat-value {
  font-size: 2.2rem;
  font-weight: 600;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  color: var(--ink);
  letter-spacing: -0.02em;
  display: flex;
  align-items: baseline;
  gap: 6px;
}
.streak-stat-primary .streak-stat-value,
.streak-stat-tokens .streak-stat-value { color: white; }
.streak-stat-unit {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--ink-4);
  letter-spacing: 0;
}
.streak-stat-primary .streak-stat-unit,
.streak-stat-tokens .streak-stat-unit { color: rgba(255,255,255,0.78); }
.streak-stat-snowflake {
  display: inline-flex;
  align-items: center;
  margin-right: 2px;
}
.streak-stat-tokens .streak-stat-snowflake { color: rgba(255,255,255,0.85); }

.streak-stat-sub {
  font-size: 0.82rem;
  color: var(--ink-4);
}
.streak-stat-primary .streak-stat-sub,
.streak-stat-tokens .streak-stat-sub { color: rgba(255,255,255,0.78); }

/* Freeze CTA ------------------------------------------------------- */

.streak-freeze-card {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}
.streak-freeze-copy { flex: 1 1 220px; }
.streak-freeze-copy h2 { margin: 0 0 4px; }
.streak-freeze-copy p {
  margin: 0;
  color: var(--ink-3);
  font-size: 0.92rem;
  line-height: 1.45;
}
.streak-freeze-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
}
.streak-freeze-actions .btn[disabled] {
  opacity: 0.5;
  cursor: not-allowed;
}
.streak-freeze-card.is-locked .streak-freeze-copy p::before {
  content: "Premium · ";
  font-weight: 600;
  color: var(--amber-500);
}

/* 90-day calendar -------------------------------------------------- */

.streak-legend {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  font-size: 0.78rem;
  color: var(--ink-4);
}
.streak-legend .legend-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.legend-dot {
  width: 10px;
  height: 10px;
  border-radius: 3px;
  display: inline-block;
}
.legend-dot-checked { background: var(--teal-500); }
.legend-dot-frozen  { background: #4FC3F7; }
.legend-dot-missed  { background: var(--bg-3); border: 1px solid var(--line-strong); }
.legend-dot-future  { background: transparent; border: 1px dashed var(--ink-5); }

.streak-calendar {
  display: grid;
  /* Lock to 15 columns × 6 rows = 90 cells, aligned regardless of viewport. */
  grid-template-columns: repeat(15, 1fr);
  gap: 5px;
  margin-top: 12px;
}
.streak-calendar-cell {
  position: relative;
  aspect-ratio: 1 / 1;
  border-radius: 4px;
  background: var(--bg-3);
  border: 1px solid transparent;
  transition: transform 120ms ease, box-shadow 120ms ease;
}
.streak-calendar-cell.checked {
  background: var(--teal-500);
}
.streak-calendar-cell.checked.is-recent {
  /* Slight gradient for the most recent fortnight so the eye lands
     there first — same idiom as the iOS check-in card. */
  background: linear-gradient(140deg, var(--teal-500), var(--teal-700));
}
.streak-calendar-cell.frozen {
  background: #4FC3F7;
}
.streak-calendar-cell.future {
  background: transparent;
  border: 1px dashed var(--ink-5);
  opacity: 0.55;
}
.streak-calendar-cell:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-xs);
}
.streak-calendar-note {
  margin: 14px 0 0;
  font-size: 0.78rem;
  color: var(--ink-4);
  line-height: 1.4;
}

/* Achievements ---------------------------------------------------- */

.streak-progress-wrap { margin: 4px 0 14px; }
.streak-progress-track {
  height: 8px;
  background: rgba(14, 132, 121, 0.10);
  border-radius: var(--r-full);
  overflow: hidden;
}
.streak-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--teal-500), var(--amber-500));
  border-radius: inherit;
  transition: width 320ms ease;
}

.streak-achievements {
  display: grid;
  gap: 14px 12px;
  grid-template-columns: repeat(2, 1fr);
}
@media (min-width: 540px) {
  .streak-achievements { grid-template-columns: repeat(3, 1fr); }
}
@media (min-width: 760px) {
  .streak-achievements { grid-template-columns: repeat(4, 1fr); }
}

.streak-achievement-section-label {
  grid-column: 1 / -1;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
  color: var(--ink-4);
  margin: 8px 0 -4px;
}
.streak-achievement-section-label:first-child { margin-top: 0; }

.streak-achievement {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 8px;
  padding: 14px 10px;
  border-radius: var(--r-md);
  background: var(--bg-2);
  border: 1px solid var(--line);
  transition: transform 120ms ease, box-shadow 120ms ease;
}
.streak-achievement.is-earned {
  background: var(--surface);
  box-shadow: var(--shadow-xs);
}
.streak-achievement:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}
.streak-achievement-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--ink-5);
  color: white;
  flex-shrink: 0;
}
.streak-achievement.is-earned .streak-achievement-icon {
  background: linear-gradient(140deg, var(--teal-500), var(--teal-700));
  box-shadow: 0 4px 14px rgba(7, 86, 79, 0.22);
}
.streak-achievement.is-earned .streak-achievement-icon[data-tone="amber"]   { background: linear-gradient(140deg, #F2A93B, #BF7A1B); }
.streak-achievement.is-earned .streak-achievement-icon[data-tone="indigo"]  { background: linear-gradient(140deg, #5C6BC0, #1A237E); }
.streak-achievement.is-earned .streak-achievement-icon[data-tone="crimson"] { background: linear-gradient(140deg, #C9343A, #7A1F23); }
.streak-achievement.is-earned .streak-achievement-icon[data-tone="purple"]  { background: linear-gradient(140deg, #AB47BC, #6A1B9A); }
.streak-achievement.is-earned .streak-achievement-icon[data-tone="ice"]     { background: linear-gradient(140deg, #4FC3F7, #0277BD); }
.streak-achievement.is-earned .streak-achievement-icon[data-tone="ember"]   { background: linear-gradient(140deg, #FF7043, #BF360C); }

.streak-achievement-icon svg { width: 24px; height: 24px; }

.streak-achievement-title {
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--ink-3);
  line-height: 1.2;
}
.streak-achievement.is-earned .streak-achievement-title { color: var(--ink); }
.streak-achievement-desc {
  font-size: 0.74rem;
  color: var(--ink-4);
  line-height: 1.3;
}
.streak-achievement-locked-tag {
  font-size: 0.68rem;
  color: var(--ink-4);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 600;
}

.streak-achievements-note {
  display: block;
  margin-top: 16px;
  padding: 12px 14px;
  background: rgba(14, 132, 121, 0.06);
  border-left: 3px solid var(--teal-500);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  color: var(--ink-2);
  font-size: 0.86rem;
  line-height: 1.5;
}
.streak-achievements-note strong { color: var(--ink); }

/* Leaderboard ----------------------------------------------------- */

.streak-leaderboard {
  display: grid;
  gap: 8px;
  margin: 8px 0 12px;
}
.streak-leader-row {
  display: grid;
  grid-template-columns: 28px 1fr auto;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  background: var(--bg-2);
  border-radius: var(--r-md);
  border: 1px solid transparent;
  font-variant-numeric: tabular-nums;
}
.streak-leader-row.is-self {
  background: rgba(14, 132, 121, 0.08);
  border-color: rgba(14, 132, 121, 0.20);
}
.streak-leader-rank {
  font-weight: 700;
  color: var(--ink-3);
  text-align: right;
}
.streak-leader-row.is-podium .streak-leader-rank { color: var(--amber-500); }
.streak-leader-name {
  font-weight: 600;
  color: var(--ink);
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.streak-leader-row.is-self .streak-leader-name::after {
  content: "  · You";
  color: var(--teal-700);
  font-weight: 700;
}
.streak-leader-xp {
  font-size: 0.86rem;
  color: var(--ink-3);
  font-weight: 600;
}
.streak-leader-xp small {
  font-weight: 500;
  color: var(--ink-4);
}
.streak-leaderboard-empty {
  margin: 0;
  padding: 14px;
  text-align: center;
  color: var(--ink-4);
  font-size: 0.92rem;
  background: var(--bg-2);
  border-radius: var(--r-md);
}
.streak-leaderboard-cta {
  display: flex;
  justify-content: center;
  margin-top: 6px;
}

/* Bottom CTA ------------------------------------------------------ */

.streak-bottom-cta {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 18px 22px;
  background: linear-gradient(140deg, var(--teal-700), var(--teal-800));
  color: white;
  border-radius: var(--r-lg);
  flex-wrap: wrap;
}
.streak-bottom-text { flex: 1 1 220px; }
.streak-bottom-text strong { display: block; font-size: 1rem; line-height: 1.3; }
.streak-bottom-text span { display: block; opacity: 0.78; font-size: 0.88rem; line-height: 1.45; margin-top: 2px; }
.streak-bottom-cta .btn-primary {
  background: white;
  color: var(--teal-700);
}
.streak-bottom-cta .btn-primary:hover { background: rgba(255,255,255,0.9); }

/* Empty + error + loading ----------------------------------------- */

.streak-empty-card,
.streak-error {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: clamp(22px, 3.2vw, 32px);
  box-shadow: var(--shadow-sm);
  text-align: center;
}
.streak-empty-card h2 {
  margin: 0 0 0.5rem;
  font-size: 1.3rem;
  color: var(--ink);
}
.streak-empty-card p {
  max-width: 36ch;
  margin: 0 auto 1.2rem;
  color: var(--ink-3);
  line-height: 1.5;
}
.streak-empty-actions {
  display: inline-flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
}

.streak-error {
  border-color: rgba(201, 52, 58, 0.30);
  background: rgba(201, 52, 58, 0.04);
}
.streak-error strong {
  display: block;
  font-size: 1.04rem;
  color: var(--crimson-500);
  margin-bottom: 4px;
}
.streak-error span {
  color: var(--ink-3);
  font-size: 0.92rem;
}
.streak-error-actions {
  margin-top: 14px;
  display: flex;
  justify-content: center;
}

/* Skeleton */
.streak-loading { display: grid; gap: 16px; }
.streak-skel {
  background: linear-gradient(90deg, var(--bg-2), var(--bg-3), var(--bg-2));
  background-size: 200% 100%;
  border-radius: var(--r-md);
  animation: streak-shimmer 1.4s ease-in-out infinite;
}
.streak-skel-stats { height: 92px; }
.streak-skel-grid  { height: 220px; }
@keyframes streak-shimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

@media (prefers-reduced-motion: reduce) {
  .streak-skel { animation: none; }
  .streak-progress-fill { transition: none; }
}