/* ============ Habit · Style ============ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg-1: #0f1f17;
  --bg-2: #182d22;
  --bg-3: #213a2d;
  --sage:    #86efac;
  --sage-2:  #bbf7d0;
  --sage-3:  #dcfce7;
  --emerald-deep: #16a34a;
  --butter:  #fde047;
  --gold:    #fbbf24;
  --red:     #ef4444;
  --green:   #22c55e;
  --text:    #f0fdf4;
  --muted:   rgba(240,253,244,.55);
  --faint:   rgba(240,253,244,.32);
  --safe-top: env(safe-area-inset-top, 0);
  --safe-bot: env(safe-area-inset-bottom, 0);
  --c: #86efac;  /* per-habit color */
}

html, body {
  background: var(--bg-1);
  color: var(--text);
  font-family: 'Heebo', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  overscroll-behavior: none;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}
body {
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  padding-top: calc(58px + var(--safe-top));
  padding-bottom: calc(108px + var(--safe-bot));
}

/* Ambient blurred orbs */
.ambient-bg {
  position: fixed;
  inset: 0;
  z-index: -3;
  overflow: hidden;
  background: var(--bg-1);
}
.orb-blur {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: .35;
  pointer-events: none;
  will-change: transform;
}
.orb-blur.o1 {
  width: 50vmax; height: 50vmax;
  background: radial-gradient(circle, var(--sage) 0%, transparent 60%);
  top: -15vh; right: -10vw;
  animation: drift1 28s ease-in-out infinite;
}
.orb-blur.o2 {
  width: 45vmax; height: 45vmax;
  background: radial-gradient(circle, var(--emerald-deep) 0%, transparent 60%);
  bottom: -15vh; left: -10vw;
  animation: drift2 32s ease-in-out infinite;
  opacity: .50;
}
.orb-blur.o3 {
  width: 35vmax; height: 35vmax;
  background: radial-gradient(circle, var(--butter) 0%, transparent 60%);
  top: 40vh; left: 30vw;
  animation: drift3 26s ease-in-out infinite;
  opacity: .15;
}
@keyframes drift1 { 0%,100%{transform:translate(0,0)scale(1);} 50%{transform:translate(-7vw,5vh)scale(1.05);} }
@keyframes drift2 { 0%,100%{transform:translate(0,0)scale(1);} 50%{transform:translate(7vw,-5vh)scale(.96);} }
@keyframes drift3 { 0%,100%{transform:translate(0,0)scale(1);} 50%{transform:translate(-4vw,-6vh)scale(1.04);} }

/* Top bar */
.topbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: calc(58px + var(--safe-top));
  padding-top: var(--safe-top);
  padding-inline: 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(15,31,23,.78);
  backdrop-filter: blur(18px) saturate(150%);
  -webkit-backdrop-filter: blur(18px) saturate(150%);
  border-bottom: 1px solid rgba(134,239,172,.16);
  z-index: 100;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand .mark {
  width: 30px; height: 30px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--sage), var(--sage-2));
  display: grid; place-items: center;
  color: var(--bg-1);
  box-shadow: 0 6px 18px rgba(134,239,172,.55);
}
.brand .mark svg { width: 17px; height: 17px; }
.brand span:not(.mark) {
  font-weight: 800;
  font-size: 18px;
  letter-spacing: -0.02em;
}
.header-actions { display: flex; gap: 8px; }
.icon-btn {
  width: 38px; height: 38px;
  border-radius: 50%;
  border: 1px solid rgba(134,239,172,.20);
  background: rgba(134,239,172,.06);
  color: var(--text);
  cursor: pointer;
  display: grid; place-items: center;
  font-size: 16px;
  transition: background .2s, transform .15s;
}
.icon-btn:hover { background: rgba(134,239,172,.14); }
.icon-btn:active { transform: scale(.92); }
.icon-btn-sm {
  width: 32px; height: 32px;
  border-radius: 8px;
  border: 1px solid rgba(134,239,172,.20);
  background: rgba(134,239,172,.06);
  color: var(--muted);
  cursor: pointer;
  display: grid; place-items: center;
  font-size: 13px;
}
.icon-btn-sm:hover { background: rgba(134,239,172,.14); color: var(--sage); }
.install-btn {
  background: linear-gradient(135deg, var(--sage), var(--sage-2));
  color: var(--bg-1);
  border: none;
  padding: 8px 16px;
  border-radius: 999px;
  font-family: inherit;
  font-weight: 700;
  font-size: 12px;
  cursor: pointer;
  box-shadow: 0 6px 16px rgba(134,239,172,.5);
}
.hidden { display: none !important; }

main { padding: 16px 18px; max-width: 540px; margin: 0 auto; }

/* ============ Day header ============ */
.day-header {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 16px;
  align-items: center;
  background: rgba(134,239,172,.06);
  border: 1px solid rgba(134,239,172,.18);
  border-radius: 22px;
  padding: 18px 22px;
  margin-bottom: 18px;
  position: relative;
  overflow: hidden;
}
.day-header::before {
  content: '';
  position: absolute;
  top: -40px; left: -40px;
  width: 160px; height: 160px;
  background: radial-gradient(circle, rgba(134,239,172,.20), transparent 60%);
  pointer-events: none;
}
.today-info { position: relative; }
.today-date {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  letter-spacing: 2px;
  color: var(--muted);
  text-transform: uppercase;
  margin-bottom: 4px;
}
.today-greet {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
}

.today-progress {
  position: relative;
  width: 80px; height: 80px;
}
.progress-ring { width: 100%; height: 100%; }
.progress-ring .track {
  fill: none;
  stroke: rgba(134,239,172,.10);
  stroke-width: 6;
}
.progress-ring .fill {
  fill: none;
  stroke: var(--sage);
  stroke-width: 6;
  stroke-linecap: round;
  filter: drop-shadow(0 0 6px var(--sage));
  transition: stroke-dasharray .9s cubic-bezier(.2,.9,.3,1.05);
}
.progress-text {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.progress-text .p-num {
  font-size: 18px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
  color: var(--sage);
  line-height: 1;
}
.progress-text .p-label {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 9px;
  color: var(--faint);
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-top: 3px;
}

/* ============ Habits list ============ */
.habits-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.habit-card {
  background: rgba(134,239,172,.04);
  border: 1px solid rgba(134,239,172,.12);
  border-radius: 18px;
  padding: 14px 16px;
  display: grid;
  grid-template-columns: 44px 1fr auto;
  gap: 14px;
  align-items: center;
  position: relative;
  overflow: hidden;
  border-right: 4px solid var(--c);
  transition: background .2s, transform .15s;
}
.habit-card.checked {
  background: color-mix(in srgb, var(--c) 12%, transparent);
}
.habit-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 95% 50%, var(--c), transparent 50%);
  opacity: .06;
  pointer-events: none;
}
.habit-card .h-icon {
  width: 44px; height: 44px;
  border-radius: 14px;
  background: color-mix(in srgb, var(--c) 16%, rgba(134,239,172,0.06));
  display: grid; place-items: center;
  font-size: 22px;
  flex-shrink: 0;
  cursor: pointer;
}
.habit-card .h-info { min-width: 0; cursor: pointer; }
.habit-card .h-name {
  font-weight: 600;
  font-size: 16px;
  letter-spacing: -0.01em;
  margin-bottom: 4px;
  color: var(--text);
}
.habit-card .h-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  letter-spacing: 1px;
  color: var(--muted);
}
.habit-card .h-meta .flame {
  color: var(--gold);
  font-size: 13px;
}
.habit-card .h-streak-num {
  color: var(--c);
  font-weight: 600;
}

.check-btn {
  width: 44px; height: 44px;
  border-radius: 50%;
  border: 2px solid color-mix(in srgb, var(--c) 30%, transparent);
  background: transparent;
  color: var(--c);
  cursor: pointer;
  display: grid; place-items: center;
  transition: all .25s cubic-bezier(.34,1.56,.64,1);
  flex-shrink: 0;
}
.check-btn svg { width: 22px; height: 22px; opacity: 0; transform: scale(.6); transition: all .25s; }
.check-btn:active { transform: scale(.92); }
.check-btn.checked {
  background: var(--c);
  border-color: var(--c);
  color: var(--bg-1);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--c) 20%, transparent), 0 6px 18px color-mix(in srgb, var(--c) 40%, transparent);
}
.check-btn.checked svg { opacity: 1; transform: scale(1); }

/* Last 7 days mini-row */
.h-week {
  display: flex;
  gap: 4px;
  margin-top: 8px;
}
.h-week .day-cell {
  flex: 1;
  height: 6px;
  border-radius: 3px;
  background: rgba(134,239,172,.08);
}
.h-week .day-cell.done { background: var(--c); box-shadow: 0 0 4px color-mix(in srgb, var(--c) 50%, transparent); }
.h-week .day-cell.today { outline: 1px solid color-mix(in srgb, var(--c) 50%, transparent); outline-offset: 1px; }

/* Empty state */
.empty-state {
  text-align: center;
  padding: 70px 20px;
  color: var(--muted);
}
.empty-state .ico {
  width: 80px; height: 80px;
  margin: 0 auto 18px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--sage), var(--sage-2));
  display: grid; place-items: center;
  color: var(--bg-1);
  box-shadow: 0 12px 36px rgba(134,239,172,.4);
}
.empty-state .ico svg { width: 38px; height: 38px; }
.empty-state h3 {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 10px;
  color: var(--text);
}
.empty-state p { font-size: 14px; line-height: 1.7; max-width: 320px; margin: 0 auto; }

/* FAB */
.fab {
  position: fixed;
  bottom: calc(24px + var(--safe-bot));
  left: 50%;
  transform: translateX(-50%);
  width: 60px; height: 60px;
  border-radius: 50%;
  border: none;
  background: linear-gradient(135deg, var(--sage), var(--sage-2));
  color: var(--bg-1);
  cursor: pointer;
  box-shadow:
    0 16px 36px -8px rgba(134,239,172,.6),
    0 0 0 6px rgba(134,239,172,.10);
  z-index: 80;
  display: grid;
  place-items: center;
  transition: transform .15s;
}
.fab:active { transform: translateX(-50%) scale(.94); }
.fab svg { width: 24px; height: 24px; }

/* ============ Modals ============ */
.modal {
  position: fixed; inset: 0;
  background: rgba(15,31,23,.78);
  backdrop-filter: blur(8px);
  z-index: 200;
  display: grid;
  place-items: end center;
  animation: modal-in .25s ease;
}
@keyframes modal-in { from{opacity:0;} to{opacity:1;} }
.modal-card {
  background: rgba(24,45,34,.96);
  backdrop-filter: blur(18px) saturate(160%);
  border: 1px solid rgba(134,239,172,.20);
  border-top-left-radius: 28px;
  border-top-right-radius: 28px;
  padding: 24px 22px calc(28px + var(--safe-bot));
  width: 100%;
  max-width: 540px;
  animation: sheet-up .35s cubic-bezier(.2,.9,.3,1.05);
  max-height: 90vh;
  overflow-y: auto;
}
@keyframes sheet-up { from{transform:translateY(100%);} to{transform:translateY(0);} }
.modal-card .handle { width: 38px; height: 4px; background: rgba(134,239,172,.30); border-radius: 2px; margin: -8px auto 16px; }
.modal-card h3 { font-size: 20px; font-weight: 800; letter-spacing: -0.02em; margin-bottom: 6px; }
.modal-card p { color: var(--muted); font-size: 13px; margin-bottom: 18px; line-height: 1.7; }
.modal-card p strong { color: var(--sage); }

.mark-big {
  width: 56px; height: 56px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--sage), var(--sage-2));
  margin: 0 auto 14px;
  display: grid; place-items: center;
  color: var(--bg-1);
  box-shadow: 0 10px 30px rgba(134,239,172,.55);
}
.mark-big svg { width: 28px; height: 28px; }

.modal-input {
  width: 100%;
  background: var(--bg-1);
  border: 1px solid rgba(134,239,172,.18);
  color: var(--text);
  padding: 12px 14px;
  border-radius: 12px;
  font-family: inherit;
  font-size: 15px;
  margin-bottom: 16px;
}
.modal-input:focus { outline: 2px solid var(--sage); outline-offset: 2px; }

.picker-label {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10px;
  letter-spacing: 2px;
  color: var(--faint);
  text-transform: uppercase;
  margin-bottom: 8px;
}
.icon-picker {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 6px;
  margin-bottom: 16px;
}
.icon-pick {
  aspect-ratio: 1;
  background: rgba(134,239,172,.05);
  border: 1px solid rgba(134,239,172,.12);
  color: var(--text);
  font-size: 22px;
  border-radius: 12px;
  cursor: pointer;
  transition: all .15s;
}
.icon-pick:active { transform: scale(.92); }
.icon-pick.active {
  background: rgba(134,239,172,.20);
  border-color: rgba(134,239,172,.5);
  box-shadow: 0 4px 12px rgba(134,239,172,.3);
}

.color-picker {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 6px;
  margin-bottom: 18px;
}
.color-pick {
  aspect-ratio: 1;
  border-radius: 50%;
  background: var(--c);
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform .12s;
  padding: 0;
  position: relative;
}
.color-pick:active { transform: scale(.92); }
.color-pick.active {
  border-color: var(--text);
  transform: scale(1.1);
  box-shadow: 0 0 0 2px var(--c), 0 4px 12px var(--c);
}

.modal-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.btn-mini {
  padding: 12px;
  background: rgba(134,239,172,.06);
  border: 1px solid rgba(134,239,172,.18);
  color: var(--text);
  font-family: inherit;
  font-weight: 600;
  font-size: 13px;
  border-radius: 12px;
  cursor: pointer;
  transition: background .2s;
}
.btn-mini:hover { background: rgba(134,239,172,.12); }
.btn-mini.danger {
  color: var(--red);
  border-color: rgba(239,68,68,.3);
  background: rgba(239,68,68,.08);
}
.btn-mini.danger:hover { background: rgba(239,68,68,.18); }
.btn-primary {
  padding: 14px;
  background: linear-gradient(135deg, var(--sage), var(--sage-2));
  color: var(--bg-1);
  border: none;
  border-radius: 12px;
  font-family: inherit;
  font-weight: 700;
  font-size: 14px;
  cursor: pointer;
  box-shadow: 0 12px 26px -8px rgba(134,239,172,.5);
  transition: transform .15s;
}
.btn-primary:active { transform: scale(.97); }
.btn-secondary {
  padding: 12px;
  background: rgba(134,239,172,.06);
  border: 1px solid rgba(134,239,172,.18);
  color: var(--text);
  font-family: inherit;
  font-weight: 600;
  font-size: 14px;
  border-radius: 12px;
  cursor: pointer;
}
.btn-secondary:hover { background: rgba(134,239,172,.12); }

/* Detail modal */
.detail-header {
  display: grid;
  grid-template-columns: 56px 1fr auto;
  gap: 12px;
  align-items: center;
  margin-bottom: 18px;
}
.detail-header .d-icon {
  width: 56px; height: 56px;
  border-radius: 16px;
  background: color-mix(in srgb, var(--c) 18%, transparent);
  display: grid; place-items: center;
  font-size: 28px;
}
.detail-header .d-name {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 2px;
  color: var(--c);
}
.detail-header .d-streak {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 1px;
}

.d-stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-bottom: 18px;
}
.d-stat {
  background: rgba(134,239,172,.05);
  border: 1px solid rgba(134,239,172,.12);
  border-radius: 14px;
  padding: 14px;
}
.d-stat .dv {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  color: var(--text);
}
.d-stat .dk {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10px;
  letter-spacing: 1.5px;
  color: var(--faint);
  margin-top: 4px;
  text-transform: uppercase;
}

.section-h {
  font-size: 12px;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 12px;
  font-family: 'IBM Plex Mono', monospace;
  letter-spacing: 2px;
  text-transform: uppercase;
}

/* Heatmap (GitHub-style) */
.heatmap-wrap {
  background: rgba(134,239,172,.04);
  border: 1px solid rgba(134,239,172,.10);
  border-radius: 14px;
  padding: 14px;
  margin-bottom: 18px;
  overflow-x: auto;
}
.heatmap-months {
  display: grid;
  grid-template-columns: repeat(53, 1fr);
  gap: 3px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 9px;
  color: var(--faint);
  margin-bottom: 4px;
  height: 12px;
}
.heatmap {
  display: grid;
  grid-template-columns: repeat(53, 1fr);
  grid-auto-rows: 1fr;
  gap: 3px;
  direction: ltr;
}
.heatmap .week {
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.heatmap .cell {
  aspect-ratio: 1;
  background: rgba(134,239,172,.06);
  border-radius: 3px;
  min-height: 8px;
}
.heatmap .cell.l1 { background: color-mix(in srgb, var(--c) 25%, transparent); }
.heatmap .cell.l2 { background: color-mix(in srgb, var(--c) 50%, transparent); }
.heatmap .cell.l3 { background: color-mix(in srgb, var(--c) 75%, transparent); }
.heatmap .cell.l4 { background: var(--c); box-shadow: 0 0 4px color-mix(in srgb, var(--c) 60%, transparent); }
.heatmap .cell.future { opacity: 0.25; }
.heatmap .cell.today { outline: 1px solid var(--c); outline-offset: 1px; }

/* Weekly bars */
.weekly-bars {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 6px;
  height: 100px;
  align-items: end;
  margin-bottom: 6px;
}
.weekly-bars .bar {
  background: linear-gradient(180deg, var(--sage), color-mix(in srgb, var(--sage) 50%, transparent));
  border-radius: 6px 6px 2px 2px;
  min-height: 6px;
  position: relative;
  display: flex;
  align-items: end;
  justify-content: center;
}
.weekly-bars .bar .lbl {
  position: absolute;
  bottom: -16px;
  font-size: 10px;
  color: var(--faint);
  font-family: 'IBM Plex Mono', monospace;
}
.weekly-bars .bar .vlbl {
  font-size: 10px;
  color: var(--bg-1);
  font-weight: 700;
  padding: 4px 4px 2px;
}

/* Toast */
.toast {
  position: fixed;
  top: calc(70px + var(--safe-top));
  left: 50%;
  transform: translateX(-50%);
  background: rgba(24,45,34,.96);
  border: 1px solid rgba(134,239,172,.30);
  color: var(--text);
  padding: 10px 22px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  z-index: 300;
  box-shadow: 0 18px 40px rgba(0,0,0,.5);
  backdrop-filter: blur(10px);
  animation: toast-in .25s ease;
}
@keyframes toast-in { from{opacity:0; transform:translate(-50%, -16px);} to{opacity:1; transform:translate(-50%, 0);} }
.toast.success { color: var(--sage); border-color: rgba(134,239,172,.5); }
.toast.error { color: var(--red); border-color: rgba(239,68,68,.5); }

/* Confetti burst on streak milestone */
.confetti {
  position: fixed;
  width: 8px; height: 8px;
  pointer-events: none;
  z-index: 400;
  border-radius: 2px;
}