@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;1,9..40,400&display=swap');

:root {
    --md-primary: #6750a4;
    --md-on-primary: #fff;
    --md-primary-container: #eaddff;
    --md-on-primary-container: #21005d;
    --md-secondary: #625b71;
    --md-secondary-container: #e8def8;
    --md-surface: #fef7ff;
    --md-surface-dim: #ded8e1;
    --md-surface-container: #f3edf7;
    --md-surface-container-low: #f7f2fa;
    --md-surface-container-high: #ece6f0;
    --md-on-surface: #1d1b20;
    --md-on-surface-variant: #49454f;
    --md-outline: #79747e;
    --md-outline-variant: #cac4d0;
    --md-error: #b3261e;
    --md-on-error: #fff;
    --md-shadow: 0 1px 3px rgba(0,0,0,.12), 0 1px 2px rgba(0,0,0,.08);
    --md-shadow-lg: 0 4px 12px rgba(0,0,0,.1), 0 2px 4px rgba(0,0,0,.06);
    --md-radius-sm: 8px;
    --md-radius-md: 12px;
    --md-radius-lg: 16px;
    --md-radius-xl: 28px;
}

@media (prefers-color-scheme: dark) {
    :root {
        --md-primary: #d0bcff;
        --md-on-primary: #381e72;
        --md-primary-container: #4f378b;
        --md-on-primary-container: #eaddff;
        --md-secondary: #ccc2dc;
        --md-secondary-container: #4a4458;
        --md-surface: #141218;
        --md-surface-dim: #141218;
        --md-surface-container: #211f26;
        --md-surface-container-low: #1d1b20;
        --md-surface-container-high: #2b2930;
        --md-on-surface: #e6e0e9;
        --md-on-surface-variant: #cac4d0;
        --md-outline: #938f99;
        --md-outline-variant: #49454f;
        --md-error: #f2b8b5;
        --md-on-error: #601410;
        --md-shadow: 0 1px 3px rgba(0,0,0,.3);
        --md-shadow-lg: 0 4px 12px rgba(0,0,0,.4);
    }
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
    font-family: 'DM Sans', sans-serif;
    background: var(--md-surface);
    color: var(--md-on-surface);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    min-height: 100dvh;
}

/* ─── Layout ─── */
.app { max-width: 640px; margin: 0 auto; padding: 0 16px 88px; }
.app-header {
    display: flex; align-items: center; justify-content: space-between;
    padding: 16px 0 8px; position: sticky; top: 0; z-index: 10;
    background: var(--md-surface);
}
.app-title { font-size: 20px; font-weight: 600; letter-spacing: -.02em; color: var(--md-primary); }
.app-subtitle { font-size: 12px; color: var(--md-outline); margin-top: -2px; }

/* ─── Navigation bar ─── */
.nav-bar {
    position: fixed; bottom: 0; left: 0; right: 0;
    display: flex; justify-content: center; gap: 4px;
    background: var(--md-surface-container);
    padding: 8px 12px calc(8px + env(safe-area-inset-bottom));
    z-index: 100;
    border-top: 1px solid var(--md-outline-variant);
}
.nav-item {
    flex: 1; max-width: 96px;
    display: flex; flex-direction: column; align-items: center; gap: 2px;
    padding: 6px 0; border-radius: var(--md-radius-md);
    background: none; border: none; cursor: pointer;
    color: var(--md-on-surface-variant); font: 500 11px 'DM Sans', sans-serif;
    transition: all .15s;
}
.nav-item.active { color: var(--md-primary); }
.nav-item.active .nav-icon {
    background: var(--md-primary-container);
    color: var(--md-on-primary-container);
}
.nav-icon {
    width: 48px; height: 28px; border-radius: 14px;
    display: flex; align-items: center; justify-content: center;
    font-size: 16px; transition: all .15s;
}

/* ─── Cards ─── */
.card {
    background: var(--md-surface-container-low);
    border-radius: var(--md-radius-lg);
    padding: 20px;
    margin-bottom: 12px;
    border: 1px solid var(--md-outline-variant);
}
.card-title {
    font-size: 14px; font-weight: 600; color: var(--md-on-surface);
    margin-bottom: 12px; letter-spacing: -.01em;
}

/* ─── Buttons ─── */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    font: 500 14px 'DM Sans', sans-serif;
    border: none; border-radius: var(--md-radius-xl); cursor: pointer;
    padding: 10px 24px; transition: all .15s;
    letter-spacing: .01em;
}
.btn-filled {
    background: var(--md-primary); color: var(--md-on-primary);
}
.btn-filled:hover { box-shadow: var(--md-shadow); filter: brightness(1.05); }
.btn-filled:disabled { opacity: .5; cursor: not-allowed; }
.btn-tonal {
    background: var(--md-secondary-container); color: var(--md-on-surface);
}
.btn-text {
    background: none; color: var(--md-primary); padding: 10px 12px;
}
.btn-icon {
    width: 40px; height: 40px; padding: 0;
    border-radius: 50%; background: none; border: none;
    color: var(--md-on-surface-variant); cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    font-size: 18px; transition: background .15s;
}
.btn-icon:hover { background: var(--md-surface-container-high); }
.btn-sm { padding: 6px 16px; font-size: 12px; }
.btn-block { width: 100%; }
.btn-error { background: var(--md-error); color: var(--md-on-error); }

/* ─── Inputs ─── */
.field { margin-bottom: 16px; }
.field label {
    display: block; font-size: 12px; font-weight: 500;
    color: var(--md-on-surface-variant); margin-bottom: 4px;
}
.field input, .field textarea, .field select {
    width: 100%; padding: 12px 16px;
    background: var(--md-surface-container);
    border: 1px solid var(--md-outline-variant);
    border-radius: var(--md-radius-sm);
    font: 400 14px 'DM Sans', sans-serif;
    color: var(--md-on-surface);
    outline: none; transition: border .15s;
}
.field input:focus, .field textarea:focus, .field select:focus {
    border-color: var(--md-primary);
}
.field textarea { resize: vertical; min-height: 60px; }

/* ─── Mood picker ─── */
.mood-picker {
    display: flex; gap: 8px; justify-content: center;
    margin: 16px 0;
}
.mood-btn {
    width: 56px; height: 56px;
    border-radius: 50%;
    background: var(--md-surface-container);
    border: 2px solid transparent;
    font-size: 28px; cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    transition: all .15s;
}
.mood-btn:hover { background: var(--md-surface-container-high); transform: scale(1.1); }
.mood-btn.active { border-color: var(--md-primary); background: var(--md-primary-container); transform: scale(1.15); }

/* ─── Entry list ─── */
.entry-list { display: flex; flex-direction: column; gap: 8px; }
.entry-item {
    display: flex; align-items: flex-start; gap: 12px;
    padding: 12px; border-radius: var(--md-radius-md);
    background: var(--md-surface-container);
    border: 1px solid var(--md-outline-variant);
}
.entry-icon { font-size: 20px; flex-shrink: 0; margin-top: 2px; }
.entry-body { flex: 1; min-width: 0; }
.entry-main { font-size: 14px; font-weight: 500; }
.entry-sub { font-size: 12px; color: var(--md-outline); margin-top: 2px; }
.entry-actions { flex-shrink: 0; }

/* ─── Chart area ─── */
.chart-container { margin: 12px 0; }
.chart-container canvas { width: 100%; border-radius: var(--md-radius-sm); }

/* ─── Tabs ─── */
.tab-row {
    display: flex; gap: 4px; margin-bottom: 16px;
    background: var(--md-surface-container);
    border-radius: var(--md-radius-xl);
    padding: 4px;
}
.tab-btn {
    flex: 1; padding: 8px 0;
    font: 500 12px 'DM Sans', sans-serif;
    background: none; border: none; cursor: pointer;
    border-radius: var(--md-radius-xl);
    color: var(--md-on-surface-variant);
    transition: all .15s;
}
.tab-btn.active {
    background: var(--md-primary); color: var(--md-on-primary);
}

/* ─── Legend ─── */
.legend { display: flex; gap: 12px; flex-wrap: wrap; justify-content: center; margin: 8px 0; }
.legend-item { display: flex; align-items: center; gap: 4px; font-size: 12px; color: var(--md-outline); }
.legend-dot { width: 12px; height: 12px; border-radius: 3px; display: inline-block; }

/* ─── Toggle ─── */
.toggle-row {
    display: flex; align-items: center; justify-content: space-between;
    padding: 8px 0;
}
.toggle-label { font-size: 14px; }
.toggle {
    width: 48px; height: 28px;
    background: var(--md-outline-variant);
    border-radius: 14px; border: none; cursor: pointer;
    position: relative; transition: background .2s;
}
.toggle.on { background: var(--md-primary); }
.toggle::after {
    content: ''; position: absolute;
    width: 20px; height: 20px; border-radius: 50%;
    background: #fff; top: 4px; left: 4px;
    transition: transform .2s;
}
.toggle.on::after { transform: translateX(20px); }

/* ─── Auth screen ─── */
.auth-screen {
    min-height: 100dvh; display: flex; align-items: center; justify-content: center;
    padding: 24px;
}
.auth-card {
    width: 100%; max-width: 380px;
    background: var(--md-surface-container-low);
    border-radius: var(--md-radius-lg);
    padding: 32px 24px;
    border: 1px solid var(--md-outline-variant);
}
.auth-logo { font-size: 28px; font-weight: 600; color: var(--md-primary); text-align: center; margin-bottom: 4px; }
.auth-desc { font-size: 13px; color: var(--md-outline); text-align: center; margin-bottom: 24px; }

/* ─── Snackbar ─── */
.snackbar {
    position: fixed; bottom: 80px; left: 50%; transform: translateX(-50%);
    background: var(--md-on-surface); color: var(--md-surface);
    padding: 12px 24px; border-radius: var(--md-radius-sm);
    font-size: 13px; z-index: 200;
    opacity: 0; transition: opacity .2s;
    pointer-events: none; max-width: 90%;
}
.snackbar.show { opacity: 1; }

/* ─── User list ─── */
.user-row {
    display: flex; align-items: center; gap: 12px;
    padding: 10px 0;
    border-bottom: 1px solid var(--md-outline-variant);
    font-size: 13px;
}
.user-row:last-child { border-bottom: none; }
.badge {
    font-size: 10px; padding: 2px 8px;
    border-radius: 10px;
    background: var(--md-primary-container);
    color: var(--md-on-primary-container);
    font-weight: 600;
}

/* ─── View switching ─── */
.view { display: none; }
.view.active { display: block; }

/* ─── Misc ─── */
.text-center { text-align: center; }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mb-8 { margin-bottom: 8px; }
.muted { color: var(--md-outline); font-size: 13px; }
.empty-state { text-align: center; padding: 32px 16px; color: var(--md-outline); font-size: 13px; }
.row { display: flex; gap: 8px; align-items: center; }
.spacer { flex: 1; }
.chip {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 6px 14px; border-radius: var(--md-radius-xl);
    background: var(--md-surface-container);
    border: 1px solid var(--md-outline-variant);
    font-size: 13px; cursor: pointer; transition: all .15s;
}
.chip:hover { background: var(--md-surface-container-high); }
.chip .chip-del { font-size: 14px; opacity: .6; }
.saved-meds { display: flex; flex-wrap: wrap; gap: 6px; margin: 8px 0; }