/* VitalMatch theme tokens + custom layer that complements Tailwind.
   The CSS variables stay the source of truth for charts (Plotly, Three.js)
   and any non-Tailwind components that read them via vmThemeColors().
   Tailwind utility classes layer on top. */

:root {
    color-scheme: light dark;

    /* Light theme — default */
    --bg: #ffffff;
    --bg-elevated: #f8fafc;       /* slate-50 */
    --card: #ffffff;
    --card-hover: #f1f5f9;        /* slate-100 */
    --fg: #0f172a;                /* slate-900 */
    --fg-strong: #020617;         /* slate-950 */
    --muted: #64748b;             /* slate-500 */
    --muted-soft: #94a3b8;        /* slate-400 */
    --border: #e2e8f0;            /* slate-200 */
    --border-strong: #cbd5e1;     /* slate-300 */

    /* Accent — sky / cyan, medical-clean */
    --accent: #0284c7;            /* sky-600, AA on white */
    --accent-hover: #0369a1;      /* sky-700 */
    --accent-soft: rgba(2, 132, 199, 0.10);
    --accent-on-accent: #ffffff;

    /* Status */
    --success: #16a34a;
    --success-bg: rgba(22, 163, 74, 0.10);
    --success-fg: #166534;
    --warning: #d97706;
    --warning-bg: rgba(217, 119, 6, 0.12);
    --warning-fg: #92400e;
    --danger: #dc2626;
    --danger-bg: rgba(220, 38, 38, 0.10);
    --danger-fg: #991b1b;

    /* Type */
    --font-sans: 'Inter', ui-sans-serif, system-ui, -apple-system, 'Segoe UI',
                 Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-serif: 'Lora', ui-serif, Georgia, Cambria, 'Times New Roman', serif;
    --font-mono: ui-monospace, 'SF Mono', 'Cascadia Code', Menlo, Consolas, monospace;
}

[data-theme="dark"], html.dark {
    --bg: #020617;                /* slate-950 */
    --bg-elevated: #0f172a;       /* slate-900 */
    --card: #0f172a;
    --card-hover: #1e293b;        /* slate-800 */
    --fg: #f1f5f9;                /* slate-100 */
    --fg-strong: #ffffff;
    --muted: #94a3b8;             /* slate-400 */
    --muted-soft: #64748b;
    --border: #1e293b;            /* slate-800 */
    --border-strong: #334155;     /* slate-700 */

    --accent: #38bdf8;            /* sky-400 — brighter on dark */
    --accent-hover: #7dd3fc;      /* sky-300 */
    --accent-soft: rgba(56, 189, 248, 0.15);
    --accent-on-accent: #020617;

    --success: #4ade80;
    --success-bg: rgba(74, 222, 128, 0.12);
    --success-fg: #bbf7d0;
    --warning: #fbbf24;
    --warning-bg: rgba(251, 191, 36, 0.15);
    --warning-fg: #fde68a;
    --danger: #f87171;
    --danger-bg: rgba(248, 113, 113, 0.15);
    --danger-fg: #fecaca;
}

/* Base reset — paired with Tailwind preflight */
html { scroll-behavior: smooth; }
body {
    font-family: var(--font-sans);
    background: var(--bg);
    color: var(--fg);
    font-feature-settings: 'cv02', 'cv03', 'cv04', 'cv11';
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4 {
    font-family: var(--font-serif);
    color: var(--fg-strong);
    letter-spacing: -0.015em;
}

/* --- Subtle background texture for hero/nav. Keep it cheap. ----------- */
.vm-bg-grid {
    background-image:
        linear-gradient(to right, color-mix(in srgb, var(--fg) 4%, transparent) 1px, transparent 1px),
        linear-gradient(to bottom, color-mix(in srgb, var(--fg) 4%, transparent) 1px, transparent 1px);
    background-size: 32px 32px;
}
.vm-bg-radial {
    background:
        radial-gradient(ellipse 80% 60% at 50% -10%, var(--accent-soft) 0%, transparent 60%),
        var(--bg);
}

/* --- Cards, buttons, pills used widely; Tailwind-expressible but it's
       cleaner to centralize the variants here.                         */
.vm-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    box-shadow: 0 1px 2px 0 rgba(15, 23, 42, 0.04);
    transition: box-shadow 0.18s ease, border-color 0.18s ease, transform 0.18s ease;
}
.vm-card:hover {
    border-color: var(--border-strong);
    box-shadow: 0 4px 14px -2px rgba(15, 23, 42, 0.08);
}
[data-theme="dark"] .vm-card:hover, html.dark .vm-card:hover {
    box-shadow: 0 4px 14px -2px rgba(0, 0, 0, 0.4);
}
.vm-card-elevated {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    box-shadow: 0 8px 30px -8px rgba(15, 23, 42, 0.12);
}

.vm-btn {
    display: inline-flex; align-items: center; justify-content: center;
    gap: 0.4rem;
    padding: 0.5rem 0.9rem;
    border-radius: 0.5rem;
    font-weight: 500;
    font-size: 0.875rem;
    line-height: 1.25;
    transition: background-color 0.15s, border-color 0.15s, color 0.15s, transform 0.05s;
    cursor: pointer; text-decoration: none;
    border: 1px solid transparent;
    -webkit-user-select: none;
    user-select: none;
}
.vm-btn:active { transform: translateY(1px); }
.vm-btn:disabled, .vm-btn.is-disabled {
    opacity: 0.5; cursor: not-allowed;
}
.vm-btn-primary {
    background: var(--accent); color: var(--accent-on-accent);
}
.vm-btn-primary:hover:not(:disabled) { background: var(--accent-hover); }
.vm-btn-secondary {
    background: var(--card); color: var(--fg);
    border-color: var(--border);
}
.vm-btn-secondary:hover:not(:disabled) {
    background: var(--card-hover); border-color: var(--border-strong);
}
.vm-btn-ghost {
    background: transparent; color: var(--fg);
}
.vm-btn-ghost:hover:not(:disabled) { background: var(--card-hover); }
.vm-btn-danger {
    background: var(--danger-bg); color: var(--danger-fg);
    border-color: var(--danger);
}
.vm-btn-sm { padding: 0.3rem 0.65rem; font-size: 0.8rem; border-radius: 0.4rem; }
.vm-btn-lg { padding: 0.65rem 1.15rem; font-size: 0.95rem; border-radius: 0.6rem; }

/* Pill nav (replaces .nav-pill from old base.html) */
.vm-pill {
    display: inline-flex; align-items: center; gap: 0.35rem;
    padding: 0.3rem 0.8rem;
    border-radius: 9999px;
    font-size: 0.82rem; font-weight: 500;
    border: 1px solid var(--border);
    background: transparent; color: var(--fg);
    text-decoration: none;
    transition: background-color 0.12s, border-color 0.12s, color 0.12s;
}
.vm-pill:hover {
    border-color: var(--accent); color: var(--accent);
    text-decoration: none;
}
.vm-pill-active, .vm-pill.active {
    background: var(--accent); color: var(--accent-on-accent);
    border-color: var(--accent);
}
.vm-pill-active:hover, .vm-pill.active:hover {
    color: var(--accent-on-accent);
}

/* Tag (small badge — used in nav, hero, status chips) */
.vm-tag {
    display: inline-flex; align-items: center;
    padding: 0.12rem 0.5rem; border-radius: 9999px;
    font-size: 0.65rem; font-weight: 700; letter-spacing: 0.08em;
    text-transform: uppercase;
    background: var(--accent); color: var(--accent-on-accent);
}
.vm-tag-soft {
    background: var(--accent-soft); color: var(--accent);
}

/* Inputs */
.vm-input, .vm-select, .vm-textarea {
    width: 100%;
    padding: 0.5rem 0.75rem;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    color: var(--fg);
    font: inherit; font-size: 0.875rem;
    transition: border-color 0.12s, box-shadow 0.12s;
}
.vm-input:focus, .vm-select:focus, .vm-textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-soft);
}

/* Dropdown menu (Alpine-powered in nav_top.html) */
.vm-menu {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 0.6rem;
    box-shadow: 0 8px 30px -8px rgba(15, 23, 42, 0.18);
    overflow: hidden;
    min-width: 12rem;
}
[data-theme="dark"] .vm-menu, html.dark .vm-menu {
    box-shadow: 0 8px 30px -8px rgba(0, 0, 0, 0.6);
}
.vm-menu a, .vm-menu button {
    display: flex; align-items: center; gap: 0.5rem;
    padding: 0.55rem 0.85rem;
    font-size: 0.85rem; color: var(--fg);
    text-decoration: none;
    width: 100%; text-align: left; background: transparent; border: 0;
    cursor: pointer;
}
.vm-menu a:hover, .vm-menu button:hover { background: var(--card-hover); }
.vm-menu-section {
    padding: 0.35rem 0.85rem;
    font-size: 0.68rem; color: var(--muted);
    text-transform: uppercase; letter-spacing: 0.07em; font-weight: 600;
    background: var(--bg-elevated);
}

/* Status chip + alert */
.vm-chip { display: inline-flex; align-items: center; gap: 0.35rem;
    padding: 0.18rem 0.55rem; border-radius: 9999px;
    font-size: 0.72rem; font-weight: 600;
    background: var(--card-hover); color: var(--muted);
    border: 1px solid var(--border);
}
.vm-chip-ok { background: var(--success-bg); color: var(--success-fg);
              border-color: var(--success); }
.vm-chip-warn { background: var(--warning-bg); color: var(--warning-fg);
                border-color: var(--warning); }
.vm-chip-err { background: var(--danger-bg); color: var(--danger-fg);
               border-color: var(--danger); }

.vm-alert {
    padding: 0.7rem 1rem; border-radius: 0.5rem;
    border: 1px solid; margin-bottom: 1rem; font-size: 0.875rem;
}
.vm-alert-info { background: var(--accent-soft); color: var(--accent);
                 border-color: var(--accent); }
.vm-alert-success { background: var(--success-bg); color: var(--success-fg);
                    border-color: var(--success); }
.vm-alert-warning { background: var(--warning-bg); color: var(--warning-fg);
                    border-color: var(--warning); }
.vm-alert-danger { background: var(--danger-bg); color: var(--danger-fg);
                   border-color: var(--danger); }

/* Backward-compat aliases so existing pages keep rendering during migration.
   Plain CSS (no @apply) — Tailwind Play CDN only processes inline classes,
   not @apply in external stylesheets. */
.card {
    background: var(--card); border: 1px solid var(--border);
    border-radius: 0.75rem; padding: 1.25rem; margin-bottom: 1rem;
    box-shadow: 0 1px 2px 0 rgba(15, 23, 42, 0.04);
}
.btn, .btn-secondary {
    display: inline-flex; align-items: center; justify-content: center;
    gap: 0.4rem; padding: 0.5rem 0.9rem; border-radius: 0.5rem;
    font-weight: 500; font-size: 0.875rem; cursor: pointer;
    background: var(--card); color: var(--fg);
    border: 1px solid var(--border); text-decoration: none;
    transition: background-color 0.15s, border-color 0.15s;
}
.btn:hover, .btn-secondary:hover {
    background: var(--card-hover); border-color: var(--border-strong);
    text-decoration: none;
}
.btn-primary {
    display: inline-flex; align-items: center; justify-content: center;
    gap: 0.4rem; padding: 0.5rem 0.9rem; border-radius: 0.5rem;
    font-weight: 500; font-size: 0.875rem; cursor: pointer;
    background: var(--accent); color: var(--accent-on-accent);
    border: 1px solid var(--accent); text-decoration: none;
    transition: background-color 0.15s;
}
.btn-primary:hover { background: var(--accent-hover); text-decoration: none; }
.btn-sm { padding: 0.3rem 0.65rem !important; font-size: 0.8rem !important; }
.btn:disabled, .btn-primary:disabled, .btn-secondary:disabled {
    opacity: 0.5; cursor: not-allowed;
}
.muted { color: var(--muted); }
.flex { display: flex; gap: 0.75rem; align-items: center; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.empty { padding: 2rem; text-align: center; color: var(--muted); }
.empty-pad { padding: 1.5rem; text-align: center; color: var(--muted); font-size: 0.9rem; }
.alert {
    padding: 0.7rem 1rem; border-radius: 0.5rem;
    border: 1px solid; margin-bottom: 1rem; font-size: 0.875rem;
}
.alert-error {
    background: var(--danger-bg); color: var(--danger-fg);
    border-color: var(--danger); padding: 0.7rem 1rem;
    border-radius: 0.5rem; margin-bottom: 1rem; font-size: 0.875rem;
}
.alert-success {
    background: var(--success-bg); color: var(--success-fg);
    border-color: var(--success); padding: 0.7rem 1rem;
    border-radius: 0.5rem; margin-bottom: 1rem; font-size: 0.875rem;
}

/* Analytics-nav pill — used by _analytics_nav.html on every analytics page */
.analytics-nav {
    background: var(--card); border: 1px solid var(--border);
    border-radius: 0.75rem; padding: 0.5rem 0.75rem; margin-bottom: 0.75rem;
    display: flex; flex-wrap: wrap; gap: 0.35rem; align-items: center;
}
.analytics-nav .label {
    color: var(--muted); font-size: 0.75rem; text-transform: uppercase;
    letter-spacing: 0.06em; margin-right: 0.3rem; font-weight: 600;
}
.nav-pill {
    display: inline-flex; align-items: center; gap: 0.35rem;
    padding: 0.3rem 0.8rem; border-radius: 9999px;
    font-size: 0.82rem; font-weight: 500;
    border: 1px solid var(--border);
    background: transparent; color: var(--fg);
    text-decoration: none;
    transition: background-color 0.12s, border-color 0.12s, color 0.12s;
}
.nav-pill:hover {
    border-color: var(--accent); color: var(--accent);
    text-decoration: none;
}
.nav-pill.active {
    background: var(--accent); color: var(--accent-on-accent);
    border-color: var(--accent);
}

/* Tables — keep the old default behaviour readable */
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 0.5rem 0.75rem;
         border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 600; font-size: 0.8rem;
     text-transform: uppercase; letter-spacing: 0.04em; }
tr:hover td { background: var(--card-hover); }

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

/* Theme-toggle icon swap — pure CSS so it never flickers on theme change.
   Default (no attribute) and light mode show the moon; dark mode shows
   the sun (each icon represents what clicking the button switches TO). */
.vm-icon-sun  { display: none; }
.vm-icon-moon { display: inline-block; }
html.dark .vm-icon-sun,
[data-theme="dark"] .vm-icon-sun  { display: inline-block; }
html.dark .vm-icon-moon,
[data-theme="dark"] .vm-icon-moon { display: none; }

/* ------------- Redesigned analytics nav (vm-anav) ----------------------
   Used by _analytics_nav.html. Pills carry small icons, group dividers
   give visual rhythm, and the active state uses the brand accent.
   Compatible with the old .analytics-nav/.nav-pill classes which remain
   defined above for any caller not yet migrated.                       */
.vm-anav {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 0.5rem 0.65rem;
    margin-bottom: 1rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem;
    align-items: center;
    box-shadow: 0 1px 2px rgba(15,23,42,0.04);
}
.vm-anav-label {
    color: var(--muted);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-weight: 600;
    padding: 0 0.5rem 0 0.3rem;
    margin-right: 0.1rem;
}
.vm-anav-divider {
    width: 1px;
    height: 18px;
    background: var(--border);
    margin: 0 0.25rem;
    flex-shrink: 0;
}
.vm-anav-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.3rem 0.7rem;
    border-radius: 8px;
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--fg);
    background: transparent;
    border: 1px solid transparent;
    text-decoration: none;
    transition: background-color 0.12s, border-color 0.12s, color 0.12s, transform 0.12s;
    white-space: nowrap;
}
.vm-anav-pill:hover {
    background: var(--card-hover);
    color: var(--accent);
    text-decoration: none;
}
.vm-anav-pill.is-active {
    background: var(--accent);
    color: var(--accent-on-accent);
    border-color: var(--accent);
    box-shadow: 0 4px 12px -4px rgba(2,132,199,0.45);
}
.vm-anav-pill.is-active .vm-anav-ico { opacity: 1; }
.vm-anav-ico {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 14px;
    height: 14px;
    opacity: 0.75;
    flex-shrink: 0;
}
.vm-anav-ico svg { width: 14px; height: 14px; }
.vm-anav-pill:hover .vm-anav-ico { opacity: 1; }
.vm-anav-spacer { flex: 1; }
.vm-anav-back {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.3rem 0.7rem;
    border-radius: 8px;
    font-size: 0.78rem;
    color: var(--muted);
    border: 1px dashed var(--border);
    background: transparent;
    text-decoration: none;
    transition: color 0.12s, border-color 0.12s;
}
.vm-anav-back:hover {
    color: var(--accent);
    border-color: var(--accent);
    text-decoration: none;
}

/* Metadata-card form layout (used by _metadata_card.html partial) */
.vm-meta-form {
    display: grid;
    grid-template-columns: 1fr 1fr auto auto;
    gap: 0.5rem;
    margin-bottom: 0.6rem;
    align-items: stretch;
}
@media (max-width: 700px) {
    .vm-meta-form { grid-template-columns: 1fr; }
}