:root {
    --bg: #0f0f1a;
    --bg-card: #1a1a2e;
    --bg-card-hover: #22223a;
    --fg: #e8e8f0;
    --fg-muted: #8888a0;
    --accent: #4ade80;
    --bad: #f87171;
    --border: #2a2a42;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
[x-cloak] { display: none !important; }

html, body {
    background: var(--bg);
    color: var(--fg);
    font-family: -apple-system, BlinkMacSystemFont, 'Inter', 'SF Pro Text', system-ui, sans-serif;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
}

#app {
    max-width: 720px;
    margin: 0 auto;
    padding-bottom: 80px;
    min-height: 100vh;
}

.tab-content {
    padding: max(env(safe-area-inset-top), 20px) 20px 20px;
}

.page-header {
    margin-bottom: 24px;
}
.page-header h1 {
    font-size: 32px;
    font-weight: 700;
    letter-spacing: -0.02em;
}
.subtitle {
    color: var(--fg-muted);
    font-size: 14px;
    margin-top: 4px;
}

/* ---- Today multi-day grid ---- */
.grid-wrap {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin: 0 -20px;
    padding: 0 20px 8px;
    scrollbar-width: thin;
    scrollbar-color: #6366f1 var(--bg-card);
}
.grid-wrap::-webkit-scrollbar { height: 10px; }
.grid-wrap::-webkit-scrollbar-track { background: var(--bg-card); border-radius: 5px; }
.grid-wrap::-webkit-scrollbar-thumb {
    background: #6366f1;
    border-radius: 5px;
    border: 2px solid var(--bg-card);
}
.grid-wrap::-webkit-scrollbar-thumb:hover { background: #818cf8; }
.habit-table {
    display: grid;
    grid-template-columns: 140px repeat(var(--n-days), 42px);
    gap: 3px;
    min-width: max-content;
}
.ht-header {
    font-size: 11px;
    color: var(--fg-muted);
    text-align: center;
    padding: 8px 4px 12px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}
.ht-corner { }
.ht-day { position: relative; }
.ht-day .ht-month {
    position: absolute;
    top: -4px; left: 0;
    font-size: 10px;
    font-weight: 700;
    color: var(--accent);
    white-space: nowrap;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.ht-day .ht-dow { font-size: 10px; opacity: 0.8; }
.ht-day .ht-num { font-size: 14px; font-weight: 700; color: var(--fg); margin-top: 2px; }
.ht-day.today .ht-num { color: var(--accent); }
.ht-day.month-start { border-left: 2px solid var(--border); padding-left: 6px; }
.ht-name {
    display: flex;
    align-items: center;
    padding: 0 10px 0 4px;
    background: var(--bg);
    border-radius: 10px;
    border-left: 3px solid var(--row-color);
    font-size: 14px;
    font-weight: 600;
    min-height: 52px;
    position: sticky;
    left: 0;
    z-index: 5;
    box-shadow: 6px 0 12px -4px rgba(0,0,0,0.55);
}
.ht-corner {
    position: sticky;
    left: 0;
    background: var(--bg);
    z-index: 6;
}
.ht-cell {
    background: var(--bg-card);
    border-radius: 10px;
    min-height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 18px;
    font-weight: 700;
    color: var(--fg-muted);
    border: 1px solid transparent;
    transition: all 0.15s;
    user-select: none;
}
.ht-cell:hover { background: var(--bg-card-hover); }
.ht-cell:active { transform: scale(0.93); }
.ht-cell.ht-today { border-color: var(--border); }
.ht-cell.ht-done {
    background: var(--row-color);
    color: #0f0f1a;
}
.ht-cell.ht-done.ht-bad {
    background: var(--bad);
    color: #0f0f1a;
}
.hint { color: var(--fg-muted); font-size: 12px; margin-top: 14px; text-align: center; }

/* ---- Habit cards (legacy — kept for safety) ---- */
.habit-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 12px;
}
.habit-card {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 16px;
    border: 1px solid var(--border);
    transition: all 0.2s;
    position: relative;
    overflow: hidden;
}
.habit-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--card-color, transparent);
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
}
.habit-card.done::before { opacity: 0.18; }
.habit-card.done { border-color: var(--card-color); }
.habit-card.bad.done { border-color: var(--bad); }

.habit-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}
.habit-name {
    font-weight: 600;
    font-size: 15px;
}
.streak {
    font-size: 13px;
    color: var(--fg-muted);
}

.check-btn {
    width: 100%;
    aspect-ratio: 2 / 1;
    border: 2px solid var(--border);
    background: transparent;
    color: var(--fg-muted);
    border-radius: 12px;
    font-size: 20px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s;
}
.habit-card.done .check-btn {
    background: var(--card-color);
    border-color: var(--card-color);
    color: #0f0f1a;
    transform: scale(1.02);
}
.check-btn:active { transform: scale(0.96); }

.numeric-row {
    display: flex;
    align-items: center;
    gap: 8px;
}
.numeric-row input {
    flex: 1;
    background: transparent;
    border: 1px solid var(--border);
    color: var(--fg);
    font-size: 20px;
    font-weight: 700;
    text-align: center;
    padding: 8px;
    border-radius: 10px;
    min-width: 0;
}
.numeric-row input:focus { outline: 2px solid var(--card-color); outline-offset: -1px; }
.num-btn {
    width: 36px; height: 36px;
    border-radius: 50%;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--fg);
    font-size: 18px;
    cursor: pointer;
    transition: all 0.15s;
}
.num-btn:active { background: var(--card-color); color: #0f0f1a; border-color: var(--card-color); }
.unit { font-size: 12px; color: var(--fg-muted); }

/* ---- Tab bar ---- */
.tab-bar {
    position: fixed;
    bottom: 0; left: 0; right: 0;
    background: rgba(15, 15, 26, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 1px solid var(--border);
    display: flex;
    padding: 8px 8px calc(8px + env(safe-area-inset-bottom));
    z-index: 100;
}
.tab-bar button {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--fg-muted);
    padding: 12px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    border-radius: 10px;
    transition: all 0.15s;
}
.tab-bar button.active {
    color: var(--fg);
    background: var(--bg-card);
}

/* ---- Graphs ---- */
.toggle-row {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-top: 12px;
    flex-wrap: wrap;
}
.switch {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--fg-muted);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
}
.switch input { accent-color: var(--accent); width: 18px; height: 18px; }

.agg-toggle {
    display: inline-flex;
    background: var(--bg-card);
    border-radius: 10px;
    padding: 3px;
    margin-bottom: 12px;
}
.agg-toggle button {
    background: transparent;
    border: none;
    color: var(--fg-muted);
    padding: 6px 14px;
    font-size: 13px;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
}
.agg-toggle button.active {
    background: var(--bg);
    color: var(--fg);
}
.agg-unit { color: var(--fg-muted); font-weight: 400; margin-left: 3px; }

.period-toggle {
    display: inline-flex;
    background: var(--bg-card);
    border-radius: 10px;
    padding: 3px;
    margin-top: 12px;
}
.period-toggle button {
    background: transparent;
    border: none;
    color: var(--fg-muted);
    padding: 6px 16px;
    font-size: 13px;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
}
.period-toggle button.active {
    background: var(--bg);
    color: var(--fg);
}
.habit-select {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding-bottom: 8px;
    margin-bottom: 16px;
    scrollbar-width: none;
}
.habit-select::-webkit-scrollbar { display: none; }
.chip {
    flex-shrink: 0;
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--fg-muted);
    padding: 8px 14px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
}
.chip.active {
    background: var(--chip-color);
    color: #0f0f1a;
    border-color: var(--chip-color);
}
.stats-panel {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 20px;
}
.stats-summary {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 20px;
}
.stat-label { font-size: 11px; color: var(--fg-muted); text-transform: uppercase; letter-spacing: 0.05em; }
.stat-value { font-size: 24px; font-weight: 700; margin-top: 4px; }
.stat-value.muted { color: var(--fg-muted); }
#mainChart { max-height: 320px; }

/* ---- Heatmap ---- */
.heatmap { display: flex; flex-direction: column; gap: 8px; }
.heat-row { display: grid; grid-template-columns: 110px 1fr; align-items: center; gap: 10px; }
.heat-label { font-size: 13px; font-weight: 500; color: var(--fg-muted); }
.heat-cells { display: grid; grid-template-columns: repeat(90, 1fr); gap: 2px; }
.heat-cell { aspect-ratio: 1; border-radius: 2px; background: var(--bg-card); min-width: 3px; }