/* Migrainers.online — shared design system
   Tokens deliberately mirror the SPA at /hub so both surfaces feel like one site.
   Dark mode is the default (photophobia-optimized).                              */

:root {
    --bg: #050816;
    --bg-deep: #03051c;
    --bg-glow-1: rgba(139, 92, 246, 0.18);
    --bg-glow-2: rgba(96, 165, 250, 0.16);
    --bg-glow-3: rgba(103, 232, 249, 0.10);
    --bg-glow-4: rgba(139, 92, 246, 0.08);
    --surface: rgba(15, 23, 42, 0.55);
    --surface-soft: rgba(10, 16, 32, 0.65);
    --surface-solid: #0f172a;
    --ink: #e2e8f0;
    --ink-soft: #94a3b8;
    --ink-faint: #64748b;
    --primary: #8b5cf6;
    --primary-2: #60a5fa;
    --primary-3: #67e8f9;
    --primary-soft: rgba(139, 92, 246, 0.16);
    --primary-ink: #c4b5fd;
    --primary-ghost-hover: rgba(139, 92, 246, 0.26);
    --accent: #67e8f9;
    --border: rgba(148, 163, 184, 0.18);
    --border-strong: rgba(148, 163, 184, 0.32);
    --radius-sm: 10px;
    --radius: 16px;
    --radius-lg: 24px;
    --shadow-lg: 0 30px 60px -30px rgba(0, 0, 0, 0.55);
    --font-sans: "Plus Jakarta Sans", "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
    --font-serif: "Source Serif 4", "Merriweather", Georgia, "Times New Roman", serif;
    --max-w: 1120px;
    --max-w-narrow: 760px;
}

:root[data-theme="light"] {
    --bg: #eef2ff;
    --bg-deep: #e0e7ff;
    --bg-glow-1: rgba(139, 92, 246, 0.20);
    --bg-glow-2: rgba(96, 165, 250, 0.20);
    --bg-glow-3: rgba(103, 232, 249, 0.16);
    --bg-glow-4: rgba(139, 92, 246, 0.10);
    --surface: rgba(255, 255, 255, 0.65);
    --surface-soft: rgba(245, 248, 255, 0.75);
    --surface-solid: #ffffff;
    --ink: #0f172a;
    --ink-soft: #475569;
    --ink-faint: #94a3b8;
    --primary: #7c3aed;
    --primary-2: #3b82f6;
    --primary-3: #06b6d4;
    --primary-soft: rgba(124, 58, 237, 0.12);
    --primary-ink: #5b21b6;
    --primary-ghost-hover: rgba(124, 58, 237, 0.20);
    --accent: #06b6d4;
    --border: rgba(15, 23, 42, 0.10);
    --border-strong: rgba(15, 23, 42, 0.20);
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
    background: var(--bg);
    background-image:
        radial-gradient(70vw 70vw at 80% 5%, var(--bg-glow-1), transparent 65%),
        radial-gradient(80vw 80vw at 5% 95%, var(--bg-glow-2), transparent 65%),
        radial-gradient(60vw 60vw at 50% 60%, var(--bg-glow-3), transparent 65%),
        radial-gradient(40vw 40vw at 90% 70%, var(--bg-glow-4), transparent 60%);
    background-attachment: fixed;
    color: var(--ink);
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

a { color: var(--primary-3); text-decoration: none; }
a:hover { color: var(--primary-2); text-decoration: underline; }

img { max-width: 100%; height: auto; display: block; }

/* --- Layout containers --------------------------------------------------- */
.container       { width: 100%; max-width: var(--max-w);        margin: 0 auto; padding: 0 24px; }
.container-narrow{ width: 100%; max-width: var(--max-w-narrow); margin: 0 auto; padding: 0 24px; }

.section { padding: 72px 0; }
.section-tight { padding: 48px 0; }

/* --- Top navigation ------------------------------------------------------ */
.site-nav {
    position: sticky;
    top: 0;
    z-index: 40;
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    background: var(--surface-soft);
    border-bottom: 1px solid var(--border);
}
.nav-inner {
    display: flex;
    align-items: center;
    gap: 20px;
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 14px 24px;
}
.nav-brand {
    font-weight: 700;
    font-size: 1.05rem;
    color: var(--ink);
    letter-spacing: -0.01em;
    background: linear-gradient(135deg, var(--primary-ink), var(--primary-3));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
.nav-brand:hover { text-decoration: none; }
.nav-links {
    display: flex;
    align-items: center;
    gap: 4px;
    flex: 1;
    flex-wrap: wrap;
}
.nav-link {
    color: var(--ink-soft);
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    font-size: 0.94rem;
    font-weight: 500;
    transition: background 0.15s, color 0.15s;
}
.nav-link:hover { background: var(--primary-soft); color: var(--ink); text-decoration: none; }
.nav-link.active { background: var(--primary-soft); color: var(--primary-ink); }

.nav-controls {
    display: flex;
    align-items: center;
    gap: 8px;
}
.nav-control {
    background: transparent;
    color: var(--ink-soft);
    border: 1px solid var(--border);
    padding: 7px 12px;
    border-radius: 999px;
    font-family: inherit;
    font-size: 0.85rem;
    cursor: pointer;
    transition: border-color 0.15s, color 0.15s, background 0.15s;
}
.nav-control:hover { color: var(--ink); border-color: var(--border-strong); }
.nav-auth-label { color: var(--ink-soft); font-size: 0.85rem; padding: 0 8px; }
.nav-auth-label strong { color: var(--ink); font-weight: 600; }
[data-auth-widget] { display: inline-flex; align-items: center; gap: 8px; }

.nav-toggle {
    display: none;
    background: transparent;
    border: 1px solid var(--border);
    color: var(--ink);
    padding: 6px 10px;
    border-radius: var(--radius-sm);
    cursor: pointer;
}

@media (max-width: 900px) {
    .nav-links { display: none; width: 100%; flex-direction: column; align-items: stretch; padding: 12px 0; gap: 2px; border-top: 1px solid var(--border); margin-top: 12px; }
    .nav-links.open { display: flex; }
    .nav-inner { flex-wrap: wrap; }
    .nav-toggle { display: inline-flex; }
    .nav-link { padding: 10px 12px; }
}

/* --- Hero ---------------------------------------------------------------- */
.hero {
    padding: 96px 0 72px;
    text-align: center;
}
.hero-eyebrow {
    display: inline-block;
    padding: 6px 14px;
    border: 1px solid var(--border);
    border-radius: 999px;
    color: var(--ink-soft);
    font-size: 0.8rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: 20px;
}
.hero-title {
    font-family: var(--font-serif);
    font-size: clamp(2.2rem, 5.4vw, 3.6rem);
    line-height: 1.1;
    margin: 0 0 20px;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--ink), var(--primary-ink) 55%, var(--primary-3));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
.hero-sub {
    color: var(--ink-soft);
    font-size: clamp(1.05rem, 2vw, 1.2rem);
    max-width: 640px;
    margin: 0 auto 32px;
}
.hero-cta-row { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 22px;
    border-radius: 999px;
    font-family: inherit;
    font-size: 0.98rem;
    font-weight: 600;
    cursor: pointer;
    border: 1px solid transparent;
    transition: transform 0.15s, box-shadow 0.15s, background 0.15s, border-color 0.15s;
    text-decoration: none;
}
.btn:hover { transform: translateY(-1px); text-decoration: none; }
.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-2));
    color: #fff;
    box-shadow: 0 10px 30px -12px var(--primary);
}
.btn-primary:hover { color: #fff; box-shadow: 0 14px 40px -14px var(--primary); }
.btn-ghost {
    background: transparent;
    color: var(--ink);
    border-color: var(--border-strong);
}
.btn-ghost:hover { background: var(--primary-ghost-hover); color: var(--ink); }

/* --- Section header ------------------------------------------------------ */
.section-head {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 28px;
    flex-wrap: wrap;
}
.section-title {
    font-family: var(--font-serif);
    font-size: clamp(1.6rem, 3.2vw, 2.2rem);
    margin: 0;
    letter-spacing: -0.01em;
}
.section-lede {
    color: var(--ink-soft);
    margin: 6px 0 0;
    max-width: 560px;
}
.section-more { color: var(--ink-soft); font-size: 0.92rem; }

/* --- Card grids ---------------------------------------------------------- */
.grid {
    display: grid;
    gap: 20px;
}
.grid-4 { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
.grid-2 { grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); }

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 22px;
    transition: border-color 0.2s, transform 0.2s, background 0.2s;
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.card:hover {
    border-color: var(--border-strong);
    transform: translateY(-2px);
    background: var(--surface-soft);
}
.card a.card-link { color: inherit; }
.card a.card-link:hover { text-decoration: none; }
.card-eyebrow {
    color: var(--primary-3);
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-weight: 600;
}
.card-title {
    font-family: var(--font-serif);
    font-size: 1.2rem;
    margin: 0;
    color: var(--ink);
    line-height: 1.3;
}
.card-body { color: var(--ink-soft); font-size: 0.95rem; margin: 0; }
.card-meta { color: var(--ink-faint); font-size: 0.82rem; }

.card-empty {
    grid-column: 1 / -1;
    color: var(--ink-faint);
    padding: 28px;
    border: 1px dashed var(--border);
    border-radius: var(--radius);
    text-align: center;
    font-size: 0.95rem;
}

/* --- Category tile (Learn nav) ------------------------------------------- */
.cat-tile {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 22px;
    color: inherit;
    display: block;
    transition: border-color 0.2s, transform 0.2s, background 0.2s;
}
.cat-tile:hover {
    border-color: var(--primary-ink);
    transform: translateY(-2px);
    background: var(--surface-soft);
    text-decoration: none;
}
.cat-tile h3 {
    font-family: var(--font-serif);
    margin: 0 0 8px;
    font-size: 1.15rem;
    color: var(--ink);
}
.cat-tile p { color: var(--ink-soft); font-size: 0.92rem; margin: 0; }
.cat-tile-arrow { color: var(--primary-3); font-size: 0.85rem; margin-top: 10px; }

/* --- Prose / article body ----------------------------------------------- */
.prose {
    font-family: var(--font-serif);
    font-size: 1.08rem;
    line-height: 1.75;
    color: var(--ink);
}
.prose p { margin: 0 0 1.25em; }
.prose h1, .prose h2, .prose h3, .prose h4 {
    font-family: var(--font-serif);
    color: var(--ink);
    line-height: 1.25;
    letter-spacing: -0.01em;
}
.prose h2 { font-size: 1.6rem; margin: 2em 0 0.6em; }
.prose h3 { font-size: 1.25rem; margin: 1.6em 0 0.5em; }
.prose a { color: var(--primary-3); }
.prose blockquote {
    border-left: 3px solid var(--primary);
    margin: 1.5em 0;
    padding: 6px 0 6px 18px;
    color: var(--ink-soft);
    font-style: italic;
}
.prose ul, .prose ol { padding-left: 1.4em; }
.prose code {
    background: var(--surface-soft);
    padding: 2px 6px;
    border-radius: 6px;
    font-size: 0.92em;
}

/* --- Callouts ------------------------------------------------------------ */
.callout {
    background: var(--primary-soft);
    border: 1px solid var(--border);
    border-left: 3px solid var(--primary);
    border-radius: var(--radius);
    padding: 18px 22px;
    color: var(--ink);
    font-size: 0.96rem;
}
.callout strong { color: var(--primary-ink); }

/* --- Daily tip ------------------------------------------------------------ */
.daily-tip {
    display: flex;
    align-items: baseline;
    gap: 14px;
    background: var(--primary-soft);
    border: 1px solid var(--border);
    border-left: 3px solid var(--primary);
    border-radius: var(--radius);
    padding: 14px 20px;
}
.daily-tip-label {
    flex-shrink: 0;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--primary-ink);
}
.daily-tip-text {
    margin: 0;
    color: var(--ink);
    font-size: 0.98rem;
    line-height: 1.5;
}
@media (max-width: 600px) {
    .daily-tip { flex-direction: column; gap: 6px; }
}

/* --- Cookie bar ------------------------------------------------------------ */
.cookie-bar {
    position: fixed;
    left: 16px;
    right: 16px;
    bottom: 16px;
    z-index: 90;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
    max-width: 720px;
    margin: 0 auto;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 12px 18px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.25);
    font-size: 0.9rem;
    color: var(--ink);
}
.cookie-bar[hidden] { display: none; }
.cookie-bar a { color: var(--primary-3); }
.cookie-bar-btn {
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    padding: 8px 18px;
    cursor: pointer;
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 600;
}

/* --- Footer -------------------------------------------------------------- */
.site-footer {
    border-top: 1px solid var(--border);
    padding: 40px 0 60px;
    margin-top: 80px;
    color: var(--ink-faint);
    font-size: 0.9rem;
}
.footer-inner {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    gap: 20px;
    flex-wrap: wrap;
}
.footer-links { display: flex; gap: 18px; flex-wrap: wrap; }
.footer-links a { color: var(--ink-soft); }
.footer-links a:hover { color: var(--ink); }

/* --- Calm Mode overlay (shared with /hub) ------------------------------- */
.calm-mode {
    position: fixed;
    inset: 0;
    background: radial-gradient(circle at center, var(--bg-glow-1), transparent 55%), var(--bg-deep);
    z-index: 100;
    display: none;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 30px;
    padding: 24px;
}
.calm-mode.open { display: flex; }
.calm-orb {
    width: clamp(180px, 40vmin, 320px);
    height: clamp(180px, 40vmin, 320px);
    border-radius: 50%;
    background: radial-gradient(circle at 35% 35%, var(--primary-3), var(--primary) 60%, transparent 80%);
    animation: calm-breathe 8s ease-in-out infinite;
    box-shadow: 0 0 80px -10px var(--primary);
}
@keyframes calm-breathe {
    0%, 100% { transform: scale(0.85); opacity: 0.85; }
    50%      { transform: scale(1.05); opacity: 1.0; }
}
.calm-copy {
    max-width: 420px;
    text-align: center;
    color: var(--ink-soft);
    line-height: 1.7;
}
.calm-close {
    background: transparent;
    border: 1px solid var(--border-strong);
    color: var(--ink);
    padding: 10px 22px;
    border-radius: 999px;
    cursor: pointer;
    font-family: inherit;
}

/* --- Utility classes ----------------------------------------------------- */
.text-muted { color: var(--ink-soft); }
.text-faint { color: var(--ink-faint); }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.center { text-align: center; }
.hide-mobile { }
@media (max-width: 640px) {
    .hide-mobile { display: none; }
    .section { padding: 56px 0; }
    .hero { padding: 64px 0 48px; }
}