/* ---------- Theme tokens ---------- */
:root {
    --bg:        #f6f7f9;
    --surface:   #ffffff;
    --text:      #0f1722;
    --muted:     #5a6573;
    --border:    #e6e8ec;
    --accent:    #2f9e6e;
    --accent-hover: #25865c;
    --danger:    #c0392b;
    --success-bg: #e6f4ec;
    --success-fg: #1e6b46;
    --error-bg:  #fdeaea;
    --error-fg:  #8a2a2a;
    --shadow:    0 1px 2px rgba(15, 23, 34, 0.04),
                 0 4px 12px rgba(15, 23, 34, 0.04);
    --radius:    12px;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg:        #0e1116;
        --surface:   #161b22;
        --text:      #e6edf3;
        --muted:     #8b949e;
        --border:    #262d36;
        --accent:    #3fb685;
        --accent-hover: #59c79a;
        --success-bg: #14301f;
        --success-fg: #8fe0b3;
        --error-bg:  #361616;
        --error-fg:  #f3a3a3;
        --shadow:    0 1px 2px rgba(0, 0, 0, 0.3),
                     0 4px 12px rgba(0, 0, 0, 0.25);
    }
}

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
                 Oxygen, Ubuntu, Cantarell, "Helvetica Neue", Arial, sans-serif;
    font-size: 15px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3 { margin: 0 0 0.4em; font-weight: 600; }

/* ---------- Top nav ---------- */
.topnav {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 10;
}
.nav-inner {
    max-width: 1100px;
    margin: 0 auto;
    padding: 14px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}
.brand {
    font-weight: 700;
    font-size: 17px;
    color: var(--text);
    display: inline-flex;
    align-items: center;
    gap: 10px;
}
.brand:hover { text-decoration: none; }
.brand-dot {
    width: 10px; height: 10px;
    border-radius: 50%;
    background: var(--accent);
    display: inline-block;
}
/* Wrapper for nav links + user info. On desktop it lays out inline; on mobile
   it becomes a collapsible dropdown toggled by .nav-toggle. */
.nav-menu {
    display: flex;
    align-items: center;
    gap: 16px;
    flex: 1;
    min-width: 0;
}
.nav-menu .nav-user { margin-left: auto; }

.nav-links {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
}
.nav-links a {
    display: block;
    padding: 8px 14px;
    border-radius: 8px;
    color: var(--muted);
    font-weight: 500;
    font-size: 14px;
}
.nav-links a:hover {
    background: var(--bg);
    color: var(--text);
    text-decoration: none;
}
.nav-links a.active {
    background: var(--accent);
    color: #fff;
}

/* ---------- Hamburger toggle (mobile only) ---------- */
.nav-toggle {
    display: none;                /* shown via @media below */
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 44px;
    height: 44px;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 0;
    cursor: pointer;
}
.nav-toggle-bar {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: transform .2s ease, opacity .2s ease;
}
.nav-toggle.open .nav-toggle-bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open .nav-toggle-bar:nth-child(2) { opacity: 0; }
.nav-toggle.open .nav-toggle-bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- User info on right side of nav ---------- */
.nav-user {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
}
.nav-user-name {
    color: var(--muted);
    font-weight: 500;
}
.nav-logout {
    color: var(--text);
    padding: 6px 12px;
    border-radius: 6px;
    border: 1px solid var(--border);
    font-size: 13px;
}
.nav-logout:hover {
    background: var(--bg);
    text-decoration: none;
}
.nav-settings {
    color: var(--muted);
    padding: 4px 8px;
    border-radius: 6px;
    font-size: 18px;
    line-height: 1;
}
.nav-settings:hover, .nav-settings.active {
    background: var(--bg);
    color: var(--text);
    text-decoration: none;
}

/* ---------- Layout ---------- */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 32px 24px 64px;
}
.page-title {
    font-size: 26px;
    margin-bottom: 24px;
}

/* ---------- Stat cards ---------- */
.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}
.stat-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow);
}
.stat-label {
    font-size: 13px;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    font-weight: 600;
}
.stat-value {
    font-size: 32px;
    font-weight: 700;
    margin-top: 4px;
    line-height: 1.1;
}
.stat-sub {
    font-size: 13px;
    color: var(--muted);
    margin-top: 2px;
}

/* ---------- Cards / chart grid ---------- */
.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
    margin-bottom: 20px;
}
.card-title {
    font-size: 16px;
    color: var(--text);
    margin-bottom: 16px;
}

.chart-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 16px;
    margin-bottom: 20px;
}
@media (max-width: 800px) {
    .chart-grid { grid-template-columns: 1fr; }
}
.chart-wrap {
    position: relative;
    height: 260px;
}
/* Donut/pie charts read better with slightly more room for the legend. */
.chart-wrap-pie {
    height: 300px;
}
/* Wide bar charts (e.g. strength volume by type) span the full grid row. */
.chart-card-wide {
    grid-column: 1 / -1;
}

/* ---------- Tables ---------- */
.table-wrap { overflow-x: auto; }
.table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}
.table th, .table td {
    text-align: left;
    padding: 10px 12px;
    border-bottom: 1px solid var(--border);
}
.table th {
    font-weight: 600;
    color: var(--muted);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}
.table tbody tr:last-child td { border-bottom: none; }

.empty {
    color: var(--muted);
    margin: 0;
}

/* ---------- Forms ---------- */
.form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.form-row {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}
.field {
    display: flex;
    flex-direction: column;
    gap: 6px;
    flex: 1 1 140px;
    min-width: 0;
}
.field.flex-2 { flex: 2 1 240px; }
.field label {
    font-size: 13px;
    color: var(--muted);
    font-weight: 500;
}
.field input,
.field textarea,
.field select {
    background: var(--bg);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 10px 12px;
    font: inherit;
    width: 100%;
    transition: border-color 0.15s, box-shadow 0.15s;
}
.field input:focus,
.field textarea:focus,
.field select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(47, 158, 110, 0.18);
}
.field textarea {
    resize: vertical;
    min-height: 80px;
}

.btn {
    align-self: flex-start;
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: 8px;
    padding: 10px 20px;
    font: inherit;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.15s;
}
.btn:hover { background: var(--accent-hover); }
.btn:active { transform: translateY(1px); }

/* ---------- Alerts ---------- */
.alert {
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 16px;
    font-size: 14px;
}
.alert-success {
    background: var(--success-bg);
    color: var(--success-fg);
}
.alert-error {
    background: var(--error-bg);
    color: var(--error-fg);
}

/* ---------- Radio row (used by check-in compose) ---------- */
.radio-row {
    display: flex;
    gap: 16px;
    align-items: center;
    padding: 4px 0;
}
.radio-row label {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-weight: 500;
    color: var(--text);
    cursor: pointer;
}
.radio-row input[type="radio"] {
    accent-color: var(--accent);
    width: 16px;
    height: 16px;
}

/* ---------- Type badges ---------- */
.badge {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    line-height: 1.6;
}
.badge-daily {
    background: rgba(47, 158, 110, 0.15);
    color: var(--accent);
}
.badge-weekly {
    background: rgba(99, 102, 241, 0.15);
    color: #6366f1;
}
@media (prefers-color-scheme: dark) {
    .badge-daily  { background: rgba(63, 182, 133, 0.18); color: #6dd0a3; }
    .badge-weekly { background: rgba(129, 140, 248, 0.18); color: #a5b4fc; }
}

/* ---------- Check-in card ---------- */
.checkin-card { padding: 20px 24px; }
.checkin-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 8px;
    flex-wrap: wrap;
}
.checkin-date {
    font-weight: 600;
    color: var(--text);
}
.checkin-stamp {
    font-size: 12px;
    color: var(--muted);
    margin-left: auto;
}
.checkin-title {
    font-size: 17px;
    font-weight: 600;
    margin: 0 0 8px;
    color: var(--text);
}
.checkin-body {
    color: var(--text);
    font-size: 15px;
    line-height: 1.55;
    word-wrap: break-word;
    overflow-wrap: anywhere;
}

/* ---------- Auth pages (login / register) ---------- */
.auth-shell {
    min-height: calc(100vh - 220px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 32px 16px;
}
.auth-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    width: 100%;
    max-width: 420px;
    padding: 32px;
}
.auth-title {
    margin: 0 0 24px;
    font-size: 22px;
    text-align: center;
}
.auth-footer {
    text-align: center;
    margin: 24px 0 0;
    color: var(--muted);
    font-size: 14px;
}
.auth-card .btn { width: 100%; text-align: center; align-self: stretch; }
.auth-card .form-row { flex-direction: column; }

small.muted {
    color: var(--muted);
    font-size: 12px;
    margin-top: 4px;
    display: block;
}
.error-list {
    margin: 0;
    padding-left: 18px;
}

/* ---------- Wider auth card variant (settings) ---------- */
.auth-card-wide { max-width: 560px; }
.key-status {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 8px;
    margin: 8px 0 20px;
    padding: 10px 14px;
    background: var(--bg);
    border-radius: 8px;
    border: 1px solid var(--border);
}
.key-status-label { font-weight: 600; }
.key-status-value {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 13px;
    color: var(--text);
}
.key-status-meta { color: var(--muted); font-size: 12px; }

/* ---------- Usage tiles (settings page) ---------- */
.usage-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 12px;
    margin: 12px 0 20px;
}
.usage-tile {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 14px 16px;
}
.usage-label {
    font-size: 12px;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    font-weight: 600;
}
.usage-value {
    font-size: 22px;
    font-weight: 700;
    margin-top: 4px;
    line-height: 1.1;
}
.usage-sub {
    font-size: 12px;
    color: var(--muted);
    margin-top: 2px;
}

/* ---------- AI badge on check-in cards ---------- */
.checkin-ai {
    font-size: 12px;
    font-weight: 600;
    color: var(--accent);
    padding: 2px 8px;
    background: rgba(47, 158, 110, 0.12);
    border-radius: 999px;
}
@media (prefers-color-scheme: dark) {
    .checkin-ai { background: rgba(63, 182, 133, 0.18); color: #6dd0a3; }
}

/* ---------- Buttons (additional variants) ---------- */
.btn-secondary {
    background: var(--surface);
    color: var(--text);
    border: 1px solid var(--border);
}
.btn-secondary:hover { background: var(--bg); }
.btn-danger {
    background: var(--danger);
    color: #fff;
}
.btn-danger:hover { background: #9a2e22; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); }

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ---------- AI button row on check-ins ---------- */
.ai-button-row {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: center;
}

/* ---------- Status pills ---------- */
.status-pill {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    line-height: 1.7;
    background: var(--bg);
    color: var(--muted);
    border: 1px solid var(--border);
}
.status-pending    { background: rgba(120, 130, 145, 0.12); color: var(--muted); }
.status-analyzing  { background: rgba(99, 102, 241, 0.15);  color: #6366f1; }
.status-ready      { background: rgba(47, 158, 110, 0.15);  color: var(--accent); border-color: transparent; }
.status-failed     { background: var(--error-bg);            color: var(--error-fg); border-color: transparent; }
.status-inserted   { background: rgba(47, 158, 110, 0.25);  color: var(--accent); border-color: transparent; }
@media (prefers-color-scheme: dark) {
    .status-analyzing { background: rgba(129, 140, 248, 0.18); color: #a5b4fc; }
    .status-ready     { background: rgba(63, 182, 133, 0.18);  color: #6dd0a3; }
    .status-inserted  { background: rgba(63, 182, 133, 0.28);  color: #6dd0a3; }
}

/* ---------- Upload form ---------- */
.field input[type="file"] {
    padding: 10px;
    background: var(--bg);
    border: 1px dashed var(--border);
    border-radius: 8px;
    cursor: pointer;
}
.field input[type="file"]:hover { border-color: var(--accent); }

/* ---------- Analyze page ---------- */
.analyze-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin: -12px 0 20px;
    color: var(--muted);
    font-size: 13px;
}
.analyze-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    align-items: start;
    margin-bottom: 20px;
}
@media (max-width: 900px) {
    .analyze-grid { grid-template-columns: 1fr; }
}
.analyze-photo {
    margin-bottom: 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
    background: var(--bg);
}
.analyze-photo img {
    display: block;
    width: 100%;
    height: auto;
}
.analyze-text {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 12px;
    white-space: pre-wrap;
    overflow-x: auto;
    font-size: 13px;
    margin: 8px 0 0;
}
details summary {
    cursor: pointer;
    color: var(--muted);
    font-size: 14px;
    padding: 4px 0;
}

/* ---------- Generic muted text helper ---------- */
.muted { color: var(--muted); }

/* ---------- Footer ---------- */
.site-footer {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px;
    color: var(--muted);
    text-align: center;
}

/* ---------- iOS safe-area handling (notch / home indicator) ---------- */
/* Applies in both browser and "Add to Home Screen" standalone mode. */
.topnav {
    padding-top: env(safe-area-inset-top, 0px);
}
.nav-inner {
    padding-left:  max(24px, env(safe-area-inset-left));
    padding-right: max(24px, env(safe-area-inset-right));
}
.container {
    padding-left:  max(24px, env(safe-area-inset-left));
    padding-right: max(24px, env(safe-area-inset-right));
    padding-bottom: max(64px, env(safe-area-inset-bottom) + 56px);
}

/* ---------- Tablet / narrow desktop (<=800px) ---------- */
@media (max-width: 800px) {
    .nav-inner {
        flex-wrap: wrap;
        padding-top: 12px;
        padding-bottom: 12px;
        gap: 12px;
    }
    .nav-toggle { display: inline-flex; }

    /* Collapse the menu by default; open via .open class set by header.php JS. */
    .nav-menu {
        display: none;
        flex-basis: 100%;
        flex-direction: column;
        align-items: stretch;
        gap: 12px;
        padding-top: 12px;
        border-top: 1px solid var(--border);
    }
    .nav-menu.open { display: flex; }

    .nav-links {
        flex-direction: column;
        gap: 4px;
        width: 100%;
    }
    .nav-links a {
        padding: 12px 14px;
        font-size: 15px;
        border-radius: 8px;
    }
    .nav-user {
        display: flex;
        width: 100%;
        margin-left: 0;
        flex-wrap: wrap;
        gap: 10px;
        padding-top: 12px;
        border-top: 1px solid var(--border);
        justify-content: space-between;
        align-items: center;
    }
    .nav-user-name {
        flex: 1 1 auto;
        min-width: 0;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    /* Pie/donut needs less verticals on tablet too */
    .chart-wrap-pie { height: 280px; }
}

/* ---------- Phone (<=600px) ---------- */
@media (max-width: 600px) {
    /* Tighter container; safe-area still respected via max() */
    .container {
        padding-top: 20px;
        padding-left:  max(14px, env(safe-area-inset-left));
        padding-right: max(14px, env(safe-area-inset-right));
        padding-bottom: max(48px, env(safe-area-inset-bottom) + 40px);
    }
    .nav-inner {
        padding-left:  max(16px, env(safe-area-inset-left));
        padding-right: max(16px, env(safe-area-inset-right));
    }

    .page-title { font-size: 22px; margin-bottom: 16px; }

    /* Two columns of stat cards on phones — denser scroll, easier glance. */
    .stat-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
        margin-bottom: 16px;
    }
    .stat-card { padding: 14px; }
    .stat-value { font-size: 22px; }
    .stat-label { font-size: 10px; letter-spacing: 0.03em; }
    .stat-sub   { font-size: 11px; }

    .card { padding: 18px; margin-bottom: 16px; }
    .card-title { font-size: 15px; margin-bottom: 12px; }

    /* Charts compress slightly to fit more on screen w/o scrolling */
    .chart-wrap { height: 220px; }
    .chart-wrap-pie { height: 260px; }

    /* One field per row on phones — multi-field rows get cramped otherwise */
    .form-row .field { flex: 1 1 100%; }

    /* Tap-target friendly inputs + buttons.
       16px font on inputs prevents iOS Safari from zooming on focus. */
    .field input,
    .field textarea,
    .field select {
        padding: 12px 14px;
        font-size: 16px;
    }
    .btn {
        padding: 12px 22px;
        min-height: 44px;
        width: auto;
    }
    /* On phones, primary submit buttons span full width — easier to tap. */
    .form > .btn { width: 100%; text-align: center; }

    /* Compact tables */
    .table { font-size: 13px; }
    .table th, .table td { padding: 8px 10px; }

    /* Auth + settings cards: hug the edges */
    .auth-shell { padding: 16px 12px; min-height: calc(100vh - 160px); }
    .auth-card { padding: 24px 20px; }

    /* Check-in cards: more breathing room on phones */
    .checkin-card { padding: 16px 18px; }
    .checkin-stamp { margin-left: 0; flex-basis: 100%; }

    /* Analyze page meta wraps onto its own lines */
    .analyze-meta {
        flex-wrap: wrap;
        gap: 6px 10px;
        font-size: 12px;
        margin: -6px 0 16px;
    }

    /* Usage tiles — slightly smaller on phones */
    .usage-grid { gap: 10px; }
    .usage-tile { padding: 12px 14px; }
    .usage-value { font-size: 19px; }
}

/* ---------- Standalone (Add to Home Screen) tweaks ---------- */
@media (display-mode: standalone) {
    /* In standalone, the topnav is the visual top of the app — give it a
       little extra breathing room to match a native app bar feel. */
    .topnav { box-shadow: 0 1px 0 var(--border); }
}

/* Long-word wrapping safety net (analyze page can show pasted nutrition text). */
.analyze-text,
.checkin-body { overflow-wrap: anywhere; word-break: break-word; }