/* =============================================================================
   franklin.uk — personal site
   A clean, shadcn-inspired theme: neutral palette, soft borders, subtle motion.
   ========================================================================== */

:root {
    --background: 0 0% 100%;
    --foreground: 240 10% 8%;
    --muted: 240 4% 46%;
    --card: 0 0% 100%;
    --border: 240 6% 90%;
    --accent: 240 5% 96%;
    --ring: 240 5% 65%;
    --radius: 14px;
    --maxw: 720px;

    --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

@media (prefers-color-scheme: dark) {
    :root {
        --background: 240 10% 4%;
        --foreground: 0 0% 96%;
        --muted: 240 5% 60%;
        --card: 240 9% 7%;
        --border: 240 6% 16%;
        --accent: 240 7% 12%;
        --ring: 240 5% 40%;
    }
}

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

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
    margin: 0;
    min-height: 100dvh;
    font-family: var(--font);
    font-size: 16px;
    line-height: 1.6;
    color: hsl(var(--foreground));
    background: hsl(var(--background));
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow-x: hidden;
}

/* --- Ambient background ---------------------------------------------------- */
.bg-grid {
    position: fixed;
    inset: 0;
    z-index: -2;
    background-image:
        linear-gradient(to right, hsl(var(--border) / .55) 1px, transparent 1px),
        linear-gradient(to bottom, hsl(var(--border) / .55) 1px, transparent 1px);
    background-size: 56px 56px;
    -webkit-mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, #000 30%, transparent 75%);
            mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, #000 30%, transparent 75%);
    opacity: .7;
}

.bg-glow {
    position: fixed;
    top: -240px;
    left: 50%;
    transform: translateX(-50%);
    width: 720px;
    height: 480px;
    z-index: -1;
    background: radial-gradient(circle at 50% 50%, hsl(250 90% 60% / .16), transparent 60%);
    filter: blur(20px);
    pointer-events: none;
}

/* --- Header ---------------------------------------------------------------- */
.site-header {
    width: 100%;
    max-width: var(--maxw);
    margin: 0 auto;
    padding: 24px 24px 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: inherit;
    font-weight: 600;
}

.brand-mark {
    display: grid;
    place-items: center;
    width: 34px;
    height: 34px;
    border-radius: 10px;
    background: hsl(var(--foreground));
    color: hsl(var(--background));
    font-size: 13px;
    font-weight: 700;
    letter-spacing: .04em;
}

.brand-name { font-size: 15px; }

.site-nav { display: flex; gap: 8px; }

.nav-link {
    text-decoration: none;
    color: hsl(var(--muted));
    font-size: 14px;
    font-weight: 500;
    padding: 8px 14px;
    border-radius: 999px;
    border: 1px solid transparent;
    transition: color .2s ease, border-color .2s ease, background .2s ease;
}

.nav-link:hover {
    color: hsl(var(--foreground));
    border-color: hsl(var(--border));
    background: hsl(var(--accent));
}

/* --- Layout ---------------------------------------------------------------- */
.site-main {
    flex: 1;
    width: 100%;
    max-width: var(--maxw);
    margin: 0 auto;
    padding: 0 24px;
}

.hero { padding: 72px 0 40px; }

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    margin: 0 0 22px;
    padding: 6px 14px;
    border: 1px solid hsl(var(--border));
    border-radius: 999px;
    background: hsl(var(--card) / .6);
    backdrop-filter: blur(6px);
    font-size: 13px;
    font-weight: 500;
    color: hsl(var(--muted));
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #22c55e;
    box-shadow: 0 0 0 0 rgb(34 197 94 / .5);
    animation: pulse 2.4s infinite;
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgb(34 197 94 / .5); }
    70% { box-shadow: 0 0 0 9px rgb(34 197 94 / 0); }
    100% { box-shadow: 0 0 0 0 rgb(34 197 94 / 0); }
}

.hero-title {
    margin: 0 0 20px;
    font-size: clamp(2.6rem, 7vw, 4rem);
    font-weight: 700;
    letter-spacing: -.03em;
    line-height: 1.04;
    background: linear-gradient(180deg, hsl(var(--foreground)), hsl(var(--foreground) / .68));
    -webkit-background-clip: text;
            background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-lede {
    margin: 0;
    max-width: 56ch;
    font-size: clamp(1.05rem, 2.4vw, 1.2rem);
    color: hsl(var(--muted));
}

/* --- Panels & sections ----------------------------------------------------- */
.panel { padding: 36px 0; border-top: 1px solid hsl(var(--border)); }

.section-title {
    margin: 0 0 20px;
    font-size: .82rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .14em;
    color: hsl(var(--muted));
}

.prose {
    margin: 0;
    max-width: 64ch;
    font-size: 1.05rem;
    color: hsl(var(--foreground) / .86);
}

/* --- Cards ----------------------------------------------------------------- */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}

.card {
    padding: 22px;
    border: 1px solid hsl(var(--border));
    border-radius: var(--radius);
    background: hsl(var(--card) / .55);
    backdrop-filter: blur(8px);
    transition: transform .25s ease, border-color .25s ease, box-shadow .25s ease;
}

.card:hover {
    transform: translateY(-4px);
    border-color: hsl(var(--ring) / .6);
    box-shadow: 0 16px 40px -24px hsl(240 10% 10% / .5);
}

.card-icon {
    display: grid;
    place-items: center;
    width: 40px;
    height: 40px;
    margin-bottom: 16px;
    border-radius: 10px;
    background: hsl(var(--accent));
    border: 1px solid hsl(var(--border));
    color: hsl(var(--foreground));
}

.card-icon svg { width: 20px; height: 20px; }

.card h3 { margin: 0 0 6px; font-size: 1.02rem; font-weight: 600; }

.card p { margin: 0; font-size: .94rem; color: hsl(var(--muted)); }

/* --- Footer ---------------------------------------------------------------- */
.site-footer {
    width: 100%;
    max-width: var(--maxw);
    margin: 0 auto;
    padding: 48px 24px 40px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 13px;
    color: hsl(var(--muted));
}

.footer-dot { opacity: .5; }

/* --- Reveal animation ------------------------------------------------------ */
.reveal {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity .7s cubic-bezier(.22, 1, .36, 1), transform .7s cubic-bezier(.22, 1, .36, 1);
}

.reveal[data-reveal-delay="1"] { transition-delay: .08s; }
.reveal[data-reveal-delay="2"] { transition-delay: .16s; }
.reveal[data-reveal-delay="3"] { transition-delay: .24s; }

.reveal.is-visible { opacity: 1; transform: none; }

/* --- Error pages ----------------------------------------------------------- */
.error-page { padding: 96px 0; text-align: center; }
.error-page h1 { font-size: 4rem; margin: 0 0 8px; letter-spacing: -.03em; }
.error-page p { color: hsl(var(--muted)); margin: 0 0 28px; }

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 11px 20px;
    border-radius: 999px;
    border: 1px solid hsl(var(--border));
    background: hsl(var(--foreground));
    color: hsl(var(--background));
    text-decoration: none;
    font-weight: 500;
    font-size: 14px;
    transition: transform .2s ease, opacity .2s ease;
}

.btn:hover { transform: translateY(-2px); opacity: .92; }

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation: none !important; transition: none !important; }
    .reveal { opacity: 1; transform: none; }
    html { scroll-behavior: auto; }
}