:root {
    --ink: #1a1612;
    --paper: #f5f0e8;
    --paper-dark: #ede7d9;
    --paper-darker: #e0d8c8;
    --accent: #7c5c3a;
    --accent-light: #b8926a;
    --rule: rgba(100,80,60,0.18);
    --done: #4a6741;
    --done-light: #7a9e6e;
    --done-faint: #d8e8d4;
    --rest: #8a7560;
    --rest-faint: #e8dfd0;
    --ink-muted: #6b5e4e;
    --ink-faint: #a89880;
    --safe-top: env(safe-area-inset-top, 0px);
    --safe-bottom: env(safe-area-inset-bottom, 0px);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-tap-highlight-color: transparent;
}

html, body { height: 100%; }

body {
    background: var(--paper);
    color: var(--ink);
    font-family: 'DM Mono', monospace;
    display: flex;
    flex-direction: column;
    padding-top: var(--safe-top);
    padding-bottom: var(--safe-bottom);
}

/* ── Header ── */
.header {
    background: var(--ink);
    color: var(--paper);
    padding: 0.9rem 1rem 0.8rem;
    position: relative;
    flex-shrink: 0;
}
.header::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0; right: 0; height: 3px;
    background: repeating-linear-gradient(
            90deg,
            var(--accent-light) 0, var(--accent-light) 8px,
            transparent 8px, transparent 12px
    );
}
.header-inner {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
}
.header-right {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding-top: 2px;
}
.app-title {
    font-family: 'Instrument Serif', serif;
    font-size: 1.75rem;
    line-height: 1;
    letter-spacing: -0.02em;
}
.app-title em { font-style: italic; color: var(--accent-light); }
.week-label {
    font-size: 0.6rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: rgba(245,240,232,0.4);
    margin-top: 0.2rem;
}

/* ── Sync indicator ── */
.sync-indicator {
    font-size: 0.58rem;
    letter-spacing: 0.06em;
    color: rgba(245,240,232,0.45);
    opacity: 0;
    transition: opacity 0.2s;
    white-space: nowrap;
}
.sync-indicator.show { opacity: 1; }

.history-btn {
    background: none;
    border: 1px solid rgba(255,255,255,0.15);
    color: var(--paper);
    width: 36px; height: 36px;
    border-radius: 8px;
    cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0;
    transition: background 0.15s;
}
.history-btn:hover { background: rgba(255,255,255,0.08); }

/* ── Layout ── */
.main {
    flex: 1;
    padding: 0.75rem;
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
    max-width: 480px;
    width: 100%;
    margin: 0 auto;
    min-height: 0;
}

/* ── Stats ── */
.stats-row {
    display: grid;
    grid-template-columns: 3fr 2fr;
    gap: 0.6rem;
    flex-shrink: 0;
}
.stat-card {
    background: var(--paper-dark);
    border-radius: 10px;
    padding: 0.75rem 1rem;
    border: 1px solid var(--rule);
}
.stat-card.streak { background: var(--ink); }
.stat-label {
    font-size: 0.56rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--ink-faint);
    margin-bottom: 0.15rem;
}
.stat-card.streak .stat-label { color: rgba(245,240,232,0.4); }
.stat-value {
    font-family: 'Instrument Serif', serif;
    font-size: 2.6rem;
    line-height: 1;
    color: var(--ink);
}
.stat-card.streak .stat-value { color: var(--accent-light); font-size: 3rem; }
.stat-suffix {
    font-size: 1rem;
    color: var(--ink-faint);
    font-family: 'DM Mono', monospace;
    margin-left: 2px;
}
.stat-card.streak .stat-suffix { color: rgba(245,240,232,0.35); }

/* ── Week card ── */
.week-card {
    background: var(--paper-dark);
    border: 1px solid var(--rule);
    border-radius: 12px;
    overflow: hidden;
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
    transition: box-shadow 0.4s ease, opacity 0.2s ease;
}
.week-card.loading { opacity: 0.5; pointer-events: none; }
.week-card-header {
    background: var(--paper-darker);
    border-bottom: 1px solid var(--rule);
    padding: 0.6rem 1rem;
    font-size: 0.6rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--ink-muted);
    flex-shrink: 0;
}

/* Week complete glow */
@keyframes weekGlow {
    0%   { box-shadow: 0 0 0 0 rgba(74,103,65,0); }
    30%  { box-shadow: 0 0 0 6px rgba(74,103,65,0.25); }
    100% { box-shadow: 0 0 0 0 rgba(74,103,65,0); }
}
.week-card.glow { animation: weekGlow 2s ease forwards; }

/* ── Days grid ── */
.days-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    padding: 0.75rem 0.4rem 0.85rem;
    gap: 0;
    flex: 1;
    align-items: center;
}
.day-cell {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
}
.day-name {
    font-size: 0.54rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--ink-faint);
}

/* ── Day button ── */
.day-btn {
    width: clamp(36px, 11vw, 50px);
    height: clamp(36px, 11vw, 50px);
    border-radius: 50%;
    border: 1.5px solid var(--rule);
    background: var(--paper);
    cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    position: relative;
    transition: transform 0.15s ease, background 0.15s ease,
    border-color 0.15s ease, box-shadow 0.15s ease;
}
.day-btn.today {
    border: 2.5px solid var(--accent);
    box-shadow: 0 0 0 3px rgba(124,92,58,0.12);
    background: var(--paper-dark);
}

/* Walked */
.day-btn.walked {
    background: var(--done);
    border-color: var(--done);
    box-shadow: none;
}
.day-btn.walked::after {
    content: '';
    width: clamp(11px, 3vw, 14px);
    height: clamp(7px, 2vw, 9px);
    border-left: 2.5px solid #fff;
    border-bottom: 2.5px solid #fff;
    transform: rotate(-45deg) translateY(-1px);
    display: block;
}
.day-btn.today.walked {
    background: var(--done);
    border: 2.5px solid var(--done-light);
    box-shadow: 0 0 0 3px rgba(74,103,65,0.2);
}

/* Rest */
.day-btn.rest {
    background: var(--rest-faint);
    border-color: var(--rest);
    border-style: dashed;
}
.day-btn.rest::after {
    content: '';
    width: clamp(10px, 3vw, 13px);
    height: 2px;
    background: var(--rest);
    display: block;
    border-radius: 1px;
}
.day-btn.today.rest {
    border: 2.5px dashed var(--rest);
    box-shadow: 0 0 0 3px rgba(138,117,96,0.12);
}

.day-btn.future { opacity: 0.28; cursor: default; }

@keyframes pop {
    0%   { transform: scale(1); }
    35%  { transform: scale(1.3); }
    60%  { transform: scale(0.9); }
    80%  { transform: scale(1.08); }
    100% { transform: scale(1); }
}
.day-btn.pop { animation: pop 0.38s cubic-bezier(0.36,0.07,0.19,0.97) forwards; }

/* ── Done message ── */
.done-msg {
    margin: 0 0.75rem 0.7rem;
    padding: 0.55rem 0.85rem;
    background: var(--done-faint);
    border-radius: 8px;
    font-size: 0.68rem;
    color: var(--done);
    letter-spacing: 0.04em;
    display: none;
    flex-shrink: 0;
}
.done-msg.show { display: block; }

/* ── Legend ── */
.legend {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-shrink: 0;
}
.legend-item {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 0.58rem;
    color: var(--ink-faint);
    letter-spacing: 0.05em;
}
.legend-dot {
    width: 10px; height: 10px;
    border-radius: 50%;
    flex-shrink: 0;
}
.legend-dot.walked { background: var(--done); }
.legend-dot.rest   { background: var(--rest-faint); border: 1.5px dashed var(--rest); }
.legend-dot.none   { background: var(--paper); border: 1.5px solid var(--rule); }

/* ── Footer ── */
.footer-note {
    text-align: center;
    font-size: 0.56rem;
    color: var(--ink-faint);
    letter-spacing: 0.06em;
    padding-bottom: 0.25rem;
    flex-shrink: 0;
}

/* ── Install banner ── */
.install-banner {
    display: none;
    align-items: center;
    justify-content: space-between;
    background: var(--paper-darker);
    border: 1px solid var(--rule);
    border-radius: 10px;
    padding: 0.65rem 0.85rem;
    font-size: 0.68rem;
    color: var(--ink-muted);
    flex-shrink: 0;
    gap: 0.5rem;
}
.install-banner.show { display: flex; }
.install-btn {
    background: var(--ink);
    color: var(--paper);
    border: none;
    border-radius: 6px;
    padding: 0.35rem 0.75rem;
    font-family: 'DM Mono', monospace;
    font-size: 0.65rem;
    cursor: pointer;
    white-space: nowrap;
    letter-spacing: 0.04em;
}
.install-dismiss {
    background: none;
    border: none;
    color: var(--ink-faint);
    font-size: 1rem;
    cursor: pointer;
    padding: 0 0.2rem;
    line-height: 1;
}

/* ── History panel ── */
.history-panel {
    position: fixed;
    inset: 0;
    background: rgba(26,22,18,0);
    z-index: 50;
    display: flex;
    align-items: flex-end;
    pointer-events: none;
    transition: background 0.25s ease;
}
.history-panel.open {
    background: rgba(26,22,18,0.6);
    pointer-events: all;
}
.history-sheet {
    background: var(--paper);
    border-radius: 16px 16px 0 0;
    width: 100%;
    max-width: 480px;
    margin: 0 auto;
    padding-bottom: var(--safe-bottom);
    transform: translateY(100%);
    transition: transform 0.3s cubic-bezier(0.32,0.72,0,1);
    max-height: 80vh;
    display: flex;
    flex-direction: column;
}
.history-panel.open .history-sheet { transform: translateY(0); }
.history-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1rem 0.75rem;
    border-bottom: 1px solid var(--rule);
    flex-shrink: 0;
}
.history-title {
    font-family: 'Instrument Serif', serif;
    font-size: 1.3rem;
    font-style: italic;
}
.history-close {
    background: none;
    border: none;
    font-size: 1.4rem;
    color: var(--ink-faint);
    cursor: pointer;
    line-height: 1;
    padding: 0 0.2rem;
}
.history-list {
    overflow-y: auto;
    padding: 0.75rem 1rem 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
}
.history-empty {
    font-size: 0.75rem;
    color: var(--ink-faint);
    text-align: center;
    padding: 1.5rem 0;
    letter-spacing: 0.04em;
}
.history-row {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}
.history-meta {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
}
.history-range {
    font-size: 0.68rem;
    color: var(--ink-muted);
    letter-spacing: 0.04em;
}
.history-stat {
    font-size: 0.62rem;
    color: var(--ink-faint);
    letter-spacing: 0.04em;
}
.history-dots {
    display: flex;
    gap: 5px;
}
.history-dot {
    width: 28px; height: 28px;
    border-radius: 50%;
    flex-shrink: 0;
}
.history-dot.walked { background: var(--done); }
.history-dot.rest   { background: var(--rest-faint); border: 1.5px dashed var(--rest); }
.history-dot.none   { background: var(--paper-darker); border: 1px solid var(--rule); }