/* ============================================
   Vitiligo Tracker — Stylesheet
   Modern, calm, white UI focused on clarity.
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Geist:wght@400;500;600;700&family=Geist+Mono:wght@400;500&display=swap');

:root {
    --bg:           #ffffff;
    --surface:      #fafaf7;
    --surface-2:    #f4f4ef;
    --border:       #ececea;
    --border-strong:#d8d8d4;
    --ink:          #0e0e0c;
    --ink-2:        #2c2c2a;
    --muted:        #76766f;
    --muted-2:      #9a9a92;

    --accent:       #16a34a;        /* emerald-600 */
    --accent-soft:  #dcfce7;
    --accent-ink:   #064e2a;

    /* Score scale */
    --neg2:         #b91c1c;
    --neg2-bg:      #fee2e2;
    --neg1:         #c2410c;
    --neg1-bg:      #ffedd5;
    --zero:         #4b5563;
    --zero-bg:      #f3f4f6;
    --pos1:         #15803d;
    --pos1-bg:      #d1fae5;
    --pos2:         #065f46;
    --pos2-bg:      #a7f3d0;

    --radius-sm:    8px;
    --radius:       14px;
    --radius-lg:    20px;
    --shadow-sm:    0 1px 2px rgba(15, 15, 12, 0.04), 0 1px 1px rgba(15, 15, 12, 0.03);
    --shadow:       0 4px 16px rgba(15, 15, 12, 0.05), 0 1px 2px rgba(15, 15, 12, 0.04);
    --shadow-lg:    0 10px 40px rgba(15, 15, 12, 0.08), 0 2px 4px rgba(15, 15, 12, 0.04);

    --font-body:    'Geist', ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    --font-mono:    'Geist Mono', ui-monospace, monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
    font-family: var(--font-body);
    color: var(--ink);
    background: var(--bg);
    font-size: 15px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--accent-ink); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3, h4 { margin: 0; font-weight: 600; letter-spacing: -0.01em; }
h1 { font-size: 28px; letter-spacing: -0.02em; }
h2 { font-size: 20px; }
h3 { font-size: 16px; }
p { margin: 0; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
code { font-family: var(--font-mono); background: var(--surface-2); padding: 2px 6px; border-radius: 4px; font-size: 0.9em; }

/* ============ Auth pages ============ */
.auth-page {
    min-height: 100vh;
    display: grid;
    place-items: center;
    background:
        radial-gradient(900px 500px at 50% -10%, #f0fdf4 0%, transparent 70%),
        radial-gradient(700px 400px at 90% 100%, #fef3c7 0%, transparent 70%),
        var(--bg);
    padding: 24px;
}
.auth-card {
    width: 100%;
    max-width: 420px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 36px 32px;
    box-shadow: var(--shadow-lg);
}
.auth-card h2 { margin: 18px 0 6px; font-size: 22px; }
.auth-card .muted { margin-bottom: 22px; }

.brand {
    font-weight: 700;
    font-size: 22px;
    letter-spacing: -0.03em;
    color: var(--ink);
}
.brand span {
    color: var(--accent);
    margin-left: 2px;
}

/* ============ Forms ============ */
.form { display: flex; flex-direction: column; gap: 14px; }
.form label {
    display: flex; flex-direction: column;
    font-size: 13px; font-weight: 500; color: var(--ink-2);
    gap: 6px;
}
input[type=text], input[type=password], input[type=email], input[type=date], textarea, select {
    width: 100%;
    padding: 11px 14px;
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-sm);
    background: var(--bg);
    font: inherit;
    color: var(--ink);
    transition: border-color .15s, box-shadow .15s;
}
input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-soft);
}

/* ============ Buttons ============ */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    padding: 11px 18px;
    border-radius: var(--radius-sm);
    font: inherit;
    font-weight: 500;
    border: 1px solid transparent;
    cursor: pointer;
    transition: transform .08s, background .15s, border-color .15s;
    text-decoration: none;
}
.btn:active { transform: translateY(1px); }
.btn.primary { background: var(--ink); color: #fff; border-color: var(--ink); }
.btn.primary:hover { background: #000; text-decoration: none; }
.btn.ghost { background: var(--bg); color: var(--ink); border-color: var(--border-strong); }
.btn.ghost:hover { background: var(--surface); text-decoration: none; }
.btn.block { width: 100%; }
.btn.small { padding: 7px 12px; font-size: 13px; }

/* ============ Alerts ============ */
.alert {
    padding: 12px 14px;
    border-radius: var(--radius-sm);
    background: var(--surface);
    border: 1px solid var(--border);
    margin: 12px 0;
    font-size: 14px;
}
.alert-error { background: #fef2f2; border-color: #fecaca; color: #991b1b; }
.alert-ok    { background: var(--accent-soft); border-color: #bbf7d0; color: var(--accent-ink); }

/* ============ Top bar ============ */
.topbar {
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    position: sticky; top: 0; z-index: 50;
    backdrop-filter: saturate(150%) blur(8px);
    background: rgba(255,255,255,0.85);
}
.topbar-inner {
    max-width: 1100px; margin: 0 auto;
    padding: 14px 24px;
    display: flex; align-items: center; gap: 24px;
}
.nav { display: flex; gap: 4px; flex: 1; }
.nav a {
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    color: var(--muted);
    font-weight: 500;
    font-size: 14px;
    transition: background .15s, color .15s;
}
.nav a:hover { background: var(--surface); color: var(--ink); text-decoration: none; }
.nav a.active { background: var(--ink); color: #fff; }
.user-chip {
    display: flex; align-items: center; gap: 10px;
    font-size: 14px; color: var(--muted);
}
.user-chip .logout {
    width: 32px; height: 32px;
    display: grid; place-items: center;
    border-radius: 50%;
    border: 1px solid var(--border);
    color: var(--muted);
    transition: background .15s, color .15s;
}
.user-chip .logout:hover { background: #fee2e2; color: #b91c1c; text-decoration: none; }
.user-chip .logout .logout-icon { display: block; flex-shrink: 0; }

/* ============ Page layout ============ */
.page {
    max-width: 1100px;
    margin: 0 auto;
    padding: 32px 24px 80px;
}
.footer {
    text-align: center;
    padding: 32px;
    color: var(--muted-2);
}

/* ============ Hero / header ============ */
.hero {
    display: grid; grid-template-columns: 1fr auto;
    align-items: end; gap: 32px;
    padding: 8px 0 28px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 28px;
}
.hero-left { display: flex; flex-direction: column; gap: 6px; }
.eyebrow {
    font-size: 12px; text-transform: uppercase; letter-spacing: 0.1em;
    color: var(--muted); font-weight: 600;
}
.date-heading { font-size: 32px; line-height: 1.15; }

/* Score card */
.score-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 18px 22px;
    min-width: 220px;
    text-align: right;
    transition: background .25s, border-color .25s;
}
.score-num {
    font-family: var(--font-mono);
    font-size: 38px; font-weight: 600;
    color: var(--ink);
    line-height: 1;
    letter-spacing: -0.02em;
}
.score-label {
    margin-top: 8px;
    font-size: 13px; font-weight: 500;
    display: flex; align-items: center; gap: 6px; justify-content: flex-end;
}
.score-icon { font-size: 16px; }
.score-meta { font-size: 12px; color: var(--muted); margin-top: 4px; }

.score-excellent { background: linear-gradient(135deg, #dcfce7, #f0fdf4); border-color: #86efac; }
.score-excellent .score-num { color: #14532d; }
.score-good      { background: linear-gradient(135deg, #ecfdf5, #f0fdf4); border-color: #bbf7d0; }
.score-good .score-num { color: #166534; }
.score-neutral   { background: var(--surface); }
.score-warn      { background: linear-gradient(135deg, #fef3c7, #fffbeb); border-color: #fde68a; }
.score-warn .score-num { color: #92400e; }
.score-bad       { background: linear-gradient(135deg, #fee2e2, #fef2f2); border-color: #fecaca; }
.score-bad .score-num { color: #991b1b; }

.stat-card {
    display: flex; gap: 24px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 18px 22px;
}
.stat-card div { display: flex; flex-direction: column; align-items: flex-start; }
.stat-card strong { font-size: 24px; font-family: var(--font-mono); }
.stat-card span { font-size: 12px; color: var(--muted); }

/* ============ Track cards (lifestyle) ============ */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 16px;
}
.cards-grid.wide {
    grid-template-columns: repeat(auto-fill, minmax(420px, 1fr));
}
.track-card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    transition: border-color .15s, box-shadow .15s;
}
.track-card:hover { border-color: var(--border-strong); box-shadow: var(--shadow-sm); }

.track-head {
    display: flex; gap: 14px; align-items: flex-start;
    margin-bottom: 16px;
}
.cat-icon { font-size: 26px; line-height: 1; }
.track-head h3 { font-size: 16px; }
.track-head p { margin-top: 2px; }

.score-pills {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 6px;
}
.pill {
    appearance: none;
    border: 1px solid var(--border);
    background: var(--bg);
    padding: 10px 4px;
    border-radius: 10px;
    cursor: pointer;
    display: flex; flex-direction: column; align-items: center; gap: 4px;
    transition: all .15s;
    font: inherit;
    font-size: 11px;
    color: var(--muted);
    text-align: center;
    min-height: 64px;
}
.pill:hover { border-color: var(--border-strong); }
.pill-num { font-size: 14px; font-weight: 600; font-family: var(--font-mono); color: var(--ink-2); }
.pill-text { line-height: 1.2; font-size: 10.5px; }

.pill.is-active { transform: translateY(-1px); box-shadow: var(--shadow); border-color: transparent; }
.pill.pill-neg2.is-active { background: var(--neg2-bg); color: var(--neg2); }
.pill.pill-neg2.is-active .pill-num { color: var(--neg2); }
.pill.pill-neg1.is-active { background: var(--neg1-bg); color: var(--neg1); }
.pill.pill-neg1.is-active .pill-num { color: var(--neg1); }
.pill.pill-zero.is-active { background: var(--zero-bg); color: var(--zero); }
.pill.pill-zero.is-active .pill-num { color: var(--zero); }
.pill.pill-pos1.is-active { background: var(--pos1-bg); color: var(--pos1); }
.pill.pill-pos1.is-active .pill-num { color: var(--pos1); }
.pill.pill-pos2.is-active { background: var(--pos2-bg); color: var(--pos2); }
.pill.pill-pos2.is-active .pill-num { color: var(--pos2); font-weight: 700; }

.add-more {
    display: flex; flex-direction: column; gap: 10px;
    align-items: flex-start;
    background: var(--surface);
    border-style: dashed;
}

.save-status {
    position: fixed; bottom: 24px; right: 24px;
    background: var(--ink); color: #fff;
    padding: 10px 16px; border-radius: 999px;
    font-size: 13px; font-weight: 500;
    box-shadow: var(--shadow-lg);
    opacity: 0; transform: translateY(10px);
    transition: opacity .25s, transform .25s;
    pointer-events: none;
    z-index: 100;
}
.save-status.show { opacity: 1; transform: translateY(0); }
.save-status.error { background: var(--neg2); }

/* ============ Nutrition cards ============ */
.nut-card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 22px;
    transition: border-color .15s;
}
.nut-card:hover { border-color: var(--border-strong); }
.nut-head {
    display: grid; grid-template-columns: auto 1fr auto; gap: 14px;
    align-items: center;
    margin-bottom: 16px;
}
.tier-badge {
    font-family: var(--font-mono); font-weight: 600;
    background: var(--surface);
    padding: 6px 12px; border-radius: 999px;
    font-size: 13px;
    border: 1px solid var(--border);
    color: var(--muted);
}
.tier-badge.has-value {
    background: var(--accent-soft);
    border-color: #bbf7d0;
    color: var(--accent-ink);
}

.tier-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 6px; margin-bottom: 14px; }
.tier-pill {
    appearance: none;
    border: 1px solid var(--border);
    background: var(--bg);
    padding: 12px 6px;
    border-radius: 10px;
    cursor: pointer;
    display: flex; flex-direction: column; gap: 3px; align-items: center;
    transition: all .15s;
    font: inherit;
    font-size: 12px;
    color: var(--muted);
}
.tier-pill:hover { border-color: var(--border-strong); }
.tier-pill .tier-num { font-family: var(--font-mono); font-weight: 600; color: var(--ink-2); }
.tier-pill.is-active {
    background: var(--accent-soft);
    border-color: #86efac;
    color: var(--accent-ink);
}
.tier-pill.is-active .tier-num { color: var(--accent-ink); }

.food-area { padding-top: 8px; border-top: 1px dashed var(--border); }
.food-options { padding-top: 12px; }
.food-options p { margin-bottom: 10px; }

.food-chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
    appearance: none;
    background: var(--surface);
    border: 1px solid var(--border);
    padding: 8px 12px;
    border-radius: 999px;
    font: inherit;
    font-size: 13px;
    cursor: pointer;
    color: var(--ink-2);
    display: inline-flex; gap: 6px; align-items: baseline;
    transition: all .12s;
}
.chip:hover { border-color: var(--border-strong); background: var(--bg); }
.chip strong { font-weight: 500; color: var(--ink); }
.chip-amt { color: var(--muted); font-size: 12px; }
.chip.is-active {
    background: var(--ink);
    border-color: var(--ink);
    color: #fff;
}
.chip.is-active strong, .chip.is-active .chip-amt { color: #fff; }

.manual-amount { margin-top: 14px; }
.manual-amount label { display: flex; flex-direction: column; gap: 6px; font-size: 13px; color: var(--muted); }
.manual-amount input { padding: 8px 12px; font-size: 14px; }

/* ============ Settings ============ */
.settings-form { display: flex; flex-direction: column; gap: 32px; }
.settings-block {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
}
.settings-block h2 { margin-bottom: 6px; }
.counter {
    display: inline-block;
    background: var(--surface);
    border-radius: 999px;
    padding: 2px 10px;
    font-size: 12px;
    color: var(--muted);
    margin-left: 8px;
}
.check-grid {
    margin-top: 16px;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 10px;
}
.check-card {
    display: grid;
    grid-template-columns: auto 1fr;
    grid-template-areas: "icon name" "icon meta";
    gap: 2px 12px;
    padding: 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg);
    cursor: pointer;
    transition: all .15s;
    align-items: center;
    position: relative;
}
.check-card:hover { border-color: var(--border-strong); }
.check-card input { position: absolute; opacity: 0; }
.check-card .cat-icon { grid-area: icon; font-size: 28px; }
.check-card .check-name { grid-area: name; font-weight: 500; color: var(--ink); }
.check-card .small { grid-area: meta; }
.check-card.is-active {
    background: var(--accent-soft);
    border-color: #86efac;
}
.settings-actions { display: flex; gap: 10px; }

/* ============ History / Calendar ============ */
.cal-wrap {
    display: grid; grid-template-columns: 1fr 1fr; gap: 24px;
    margin-bottom: 36px;
}
.cal {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
}
.cal h2 { margin-bottom: 16px; font-size: 16px; }
.cal-grid {
    display: grid; grid-template-columns: repeat(7, 1fr); gap: 4px;
}
.cal-dow {
    text-align: center;
    font-size: 11px;
    font-weight: 600;
    color: var(--muted-2);
    padding-bottom: 6px;
}
.cal-empty { aspect-ratio: 1; }
.cal-cell {
    aspect-ratio: 1;
    background: var(--surface);
    border: 1px solid transparent;
    border-radius: 8px;
    display: flex; flex-direction: column;
    align-items: center; justify-content: center;
    font-size: 12px;
    color: var(--muted);
    transition: all .12s;
    text-decoration: none;
}
.cal-cell:hover { background: var(--surface-2); text-decoration: none; }
.cal-cell.has-data { border-color: var(--border); color: var(--ink); }
.cal-cell .cal-day { font-weight: 500; }
.cal-cell .cal-score {
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--muted);
}
.cal-cell.is-today { outline: 2px solid var(--ink); outline-offset: -2px; }
.cal-cell.tone-excellent { background: #dcfce7; }
.cal-cell.tone-excellent .cal-score { color: #15803d; }
.cal-cell.tone-good { background: #ecfdf5; }
.cal-cell.tone-good .cal-score { color: #166534; }
.cal-cell.tone-neutral { background: var(--surface-2); }
.cal-cell.tone-warn { background: #fef3c7; }
.cal-cell.tone-warn .cal-score { color: #92400e; }
.cal-cell.tone-bad { background: #fee2e2; }
.cal-cell.tone-bad .cal-score { color: #991b1b; }

/* History list */
.history-list { background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; }
.history-list h2 { margin-bottom: 16px; }
.data-table {
    width: 100%; border-collapse: collapse; font-size: 14px;
}
.data-table th, .data-table td {
    text-align: left; padding: 12px 8px;
    border-bottom: 1px solid var(--border);
    vertical-align: middle;
}
.data-table th {
    font-size: 11px; text-transform: uppercase; letter-spacing: 0.05em;
    color: var(--muted-2); font-weight: 600;
}
.data-table tr:last-child td { border-bottom: 0; }

.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 999px;
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 600;
    background: var(--surface-2);
    margin-right: 6px;
}
.badge.tone-excellent { background: #dcfce7; color: #14532d; }
.badge.tone-good      { background: #ecfdf5; color: #166534; }
.badge.tone-neutral   { background: var(--surface-2); color: var(--muted); }
.badge.tone-warn      { background: #fef3c7; color: #92400e; }
.badge.tone-bad       { background: #fee2e2; color: #991b1b; }

/* ============ Responsive ============ */
@media (max-width: 720px) {
    .topbar-inner { padding: 12px 16px; gap: 12px; flex-wrap: wrap; }
    .nav { order: 3; flex-basis: 100%; overflow-x: auto; padding-bottom: 4px; }
    .nav a { padding: 6px 10px; font-size: 13px; white-space: nowrap; }
    .page { padding: 24px 16px 80px; }
    .hero { grid-template-columns: 1fr; gap: 18px; }
    .hero-right { justify-self: stretch; text-align: left; }
    .score-label, .score-meta { justify-content: flex-start; }
    .date-heading { font-size: 24px; }
    .cards-grid, .cards-grid.wide { grid-template-columns: 1fr; }
    .cal-wrap { grid-template-columns: 1fr; }
    .pill { font-size: 10px; padding: 8px 2px; min-height: 56px; }
    .pill-text { font-size: 9.5px; }
    .data-table th:nth-child(4), .data-table td:nth-child(4) { display: none; }
}