/* MCP-CORE Personal — site styles. Dark, lightweight, responsive. */

:root {
    --bg: #0b0f17;
    --bg-alt: #0f1420;
    --card: #131a28;
    --card-2: #182133;
    --line: #233045;
    --text: #e8edf5;
    --muted: #9aa7bd;
    --accent: #38bdf8;      /* cyan */
    --accent-2: #3b82f6;    /* blue */
    --accent-soft: rgba(56, 189, 248, 0.12);
    --ok: #3fbf7f;
    --radius: 14px;
    --maxw: 1080px;
    --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Inter,
        system-ui, sans-serif;
    --mono: ui-monospace, SFMono-Regular, "Cascadia Code", Consolas, monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    margin: 0;
    font-family: var(--font);
    color: var(--text);
    background:
        radial-gradient(900px 480px at 75% -10%, rgba(59, 130, 246, 0.16), transparent 60%),
        radial-gradient(700px 420px at 5% 0%, rgba(56, 189, 248, 0.12), transparent 55%),
        var(--bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: #7dd3fc; }

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

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 22px; }
.narrow { max-width: 760px; }
.center { text-align: center; }
.mono { font-family: var(--mono); font-size: 0.92em; }

.skip {
    position: absolute; left: -999px; top: 0;
    background: var(--accent); color: #04121d; padding: 10px 14px;
    border-radius: 0 0 10px 0; z-index: 100;
}
.skip:focus { left: 0; }

/* -- buttons -- */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    padding: 12px 20px; border-radius: 11px; font-weight: 600; font-size: 15px;
    border: 1px solid transparent; cursor: pointer; transition: .18s ease;
    white-space: nowrap;
}
.btn-sm { padding: 8px 14px; font-size: 14px; }
.btn-primary {
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    color: #04121d;
}
.btn-primary:hover { filter: brightness(1.06); color: #04121d; transform: translateY(-1px); }
.btn-ghost { border-color: var(--line); color: var(--text); background: rgba(255,255,255,.02); }
.btn-ghost:hover { border-color: var(--accent); color: var(--text); }

/* -- header / nav -- */
.site-header {
    position: sticky; top: 0; z-index: 50;
    background: rgba(11, 15, 23, 0.78);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 62px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--text); font-weight: 700; }
.brand:hover { color: var(--text); }
.brand-logo { border-radius: 7px; }
.brand-soft { color: var(--accent); font-weight: 600; }
.site-nav { display: flex; align-items: center; gap: 6px; }
.site-nav > a {
    color: var(--muted); padding: 8px 12px; border-radius: 9px; font-size: 14.5px; font-weight: 500;
}
.site-nav > a:hover { color: var(--text); background: rgba(255,255,255,.04); }
.site-nav > a.active { color: var(--text); }
.lang-switch {
    border: 1px solid var(--line); border-radius: 8px; padding: 6px 10px !important;
    font-size: 13px !important; font-weight: 600 !important; letter-spacing: .04em;
}
.lang-switch:hover { border-color: var(--accent); }
.nav-cta { margin-left: 4px; }
.nav-toggle {
    display: none; flex-direction: column; gap: 5px; background: none; border: 0;
    cursor: pointer; padding: 8px;
}
.nav-toggle span { width: 22px; height: 2px; background: var(--text); border-radius: 2px; transition: .2s; }

/* -- hero -- */
.hero { padding: 84px 0 64px; }
.hero-inner { display: flex; flex-direction: column; align-items: center; text-align: center; }
.pill {
    display: inline-block; padding: 6px 14px; border-radius: 999px;
    background: var(--accent-soft); border: 1px solid rgba(56,189,248,.3);
    color: #bae6fd; font-size: 13px; font-weight: 600; margin-bottom: 22px;
}
.hero-title {
    font-size: clamp(30px, 5vw, 50px); line-height: 1.1; margin: 0 0 18px;
    letter-spacing: -0.02em; max-width: 840px;
    background: linear-gradient(180deg, #ffffff, #b7c4da);
    -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.hero-sub { font-size: clamp(16px, 2.2vw, 19px); color: var(--muted); max-width: 660px; margin: 0 0 30px; }
.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; justify-content: center; }
.hero-proof {
    display: flex; align-items: stretch; justify-content: center; gap: 12px;
    flex-wrap: wrap; margin-top: 22px;
}
.proof-item {
    display: flex; align-items: center; gap: 9px; padding: 9px 13px;
    border: 1px solid var(--line); border-radius: 999px;
    background: rgba(19, 26, 40, .72); color: var(--muted);
    font-size: 13px;
}
.proof-item strong { color: var(--text); font-size: 14px; }
.stars { color: #facc15; letter-spacing: 1px; font-size: 14px; line-height: 1; }
.hero-flow {
    display: flex; align-items: center; gap: 10px; flex-wrap: wrap; justify-content: center;
    margin-top: 34px; color: var(--muted); font-size: 14px;
}
.hero-flow span {
    padding: 6px 14px; border: 1px solid var(--line); border-radius: 999px;
    background: var(--card); color: var(--text); font-weight: 600;
}
.hero-flow i { color: var(--accent); font-style: normal; }

/* -- sections -- */
.section { padding: 64px 0; }
.section-alt { background: var(--bg-alt); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-title { font-size: clamp(24px, 3.4vw, 32px); margin: 0 0 14px; letter-spacing: -0.01em; }
.section-lead { font-size: 18px; color: var(--muted); }
.section-sub { color: var(--muted); margin: 0 0 36px; }
.page-head { padding: 56px 0 8px; }

/* -- steps -- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin-top: 30px; }
.step-card {
    background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
    padding: 24px 20px;
}
.step-n {
    display: inline-flex; align-items: center; justify-content: center;
    width: 34px; height: 34px; border-radius: 10px; font-weight: 700;
    background: var(--accent-soft); color: var(--accent); margin-bottom: 14px;
}
.step-card h3 { margin: 0 0 6px; font-size: 18px; }
.step-card p { margin: 0; color: var(--muted); font-size: 14.5px; }

/* -- feature cards -- */
.cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin-top: 30px; }
.card {
    background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
    padding: 22px;
}
.feature-card { transition: .18s ease; }
.feature-card:hover { border-color: rgba(56,189,248,.4); transform: translateY(-2px); }
.feature-icon {
    display: inline-flex; align-items: center; justify-content: center;
    width: 42px; height: 42px; border-radius: 11px; margin-bottom: 14px;
    background: var(--accent-soft); color: var(--accent);
}
.feature-icon svg { width: 22px; height: 22px; }
.feature-card h3 { margin: 0 0 6px; font-size: 16.5px; }
.feature-card p { margin: 0; color: var(--muted); font-size: 14px; }

/* -- screenshots -- */
.shots { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; margin-top: 10px; }
.shot { margin: 0; }
.shot-frame {
    border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden;
    background: var(--card-2); aspect-ratio: 16 / 10;
}
.shot-frame img { width: 100%; height: 100%; object-fit: cover; object-position: top; }
.shot-placeholder {
    width: 100%; height: 100%; display: flex; flex-direction: column;
    align-items: center; justify-content: center; gap: 8px; color: var(--muted);
    background:
        repeating-linear-gradient(45deg, rgba(255,255,255,.015) 0 12px, transparent 12px 24px),
        var(--card-2);
}
.shot-placeholder span { font-weight: 700; color: var(--text); font-size: 17px; }
.shot-placeholder small { font-family: var(--mono); font-size: 12px; }
.shot figcaption { padding: 14px 4px 0; }
.shot figcaption strong { display: block; font-size: 15.5px; }
.shot figcaption span { color: var(--muted); font-size: 14px; }

/* -- download -- */
.download-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 22px; margin-top: 16px; }
.dl-os { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.dl-os-name { font-size: 20px; font-weight: 700; }
.badge {
    display: inline-block; padding: 4px 10px; border-radius: 999px; font-size: 12.5px;
    font-weight: 600; border: 1px solid var(--line); color: var(--muted);
}
.badge-on { color: var(--ok); border-color: rgba(63,191,127,.4); background: rgba(63,191,127,.08); }
.dl-meta { display: grid; grid-template-columns: auto 1fr; gap: 8px 18px; margin: 0 0 20px; }
.dl-meta dt { color: var(--muted); font-size: 14px; }
.dl-meta dd { margin: 0; font-size: 14px; word-break: break-all; }
.dl-meta dd.sha { color: var(--muted); }
.dl-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.download-counter {
    display: flex; justify-content: space-between; align-items: center; gap: 12px;
    margin-top: 16px; padding-top: 16px; border-top: 1px solid var(--line);
    color: var(--muted); font-size: 14px;
}
.download-counter strong { color: var(--text); font-size: 15px; }
.req-card h3 { margin: 0 0 14px; font-size: 17px; }
.req-list { margin: 0 0 18px; padding-left: 18px; color: var(--muted); }
.req-list li { margin-bottom: 8px; font-size: 14.5px; }
.soon { color: var(--muted); font-size: 14px; }

/* -- faq -- */
.faq { display: flex; flex-direction: column; gap: 10px; margin-top: 26px; }
.faq-item {
    background: var(--card); border: 1px solid var(--line); border-radius: 12px;
    padding: 4px 18px;
}
.faq-item summary {
    cursor: pointer; list-style: none; padding: 14px 0; font-weight: 600; font-size: 15.5px;
    display: flex; justify-content: space-between; align-items: center;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; color: var(--accent); font-size: 20px; }
.faq-item[open] summary::after { content: "–"; }
.faq-item p { margin: 0 0 16px; color: var(--muted); font-size: 14.5px; }

/* -- changelog -- */
.releases { display: flex; flex-direction: column; gap: 20px; }
.release-head { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 8px; }
.release-head h2 { margin: 0; font-size: 22px; }
.release-date { color: var(--muted); font-size: 14px; }
.release-sub { margin: 16px 0 8px; font-size: 14px; text-transform: uppercase; letter-spacing: .06em; color: var(--accent); }
.release-list { margin: 0 0 8px; padding-left: 18px; color: var(--text); }
.release-list li { margin-bottom: 6px; font-size: 14.5px; }
.release { padding-bottom: 24px; }
.release .btn { margin-top: 14px; }

/* -- docs -- */
.docs-steps { list-style: none; counter-reset: none; margin: 24px 0 0; padding: 0; }
.docs-step { display: flex; gap: 16px; padding: 18px 0; border-bottom: 1px solid var(--line); }
.docs-step:last-child { border-bottom: 0; }
.docs-n {
    flex: 0 0 auto; width: 30px; height: 30px; border-radius: 9px;
    display: inline-flex; align-items: center; justify-content: center; font-weight: 700;
    background: var(--accent-soft); color: var(--accent);
}
.docs-step h3 { margin: 2px 0 4px; font-size: 16.5px; }
.docs-step p { margin: 0; color: var(--muted); font-size: 14.5px; }
.docs-foot { margin-top: 30px; }

/* -- privacy -- */
.privacy-list { margin: 24px 0 0; padding-left: 18px; }
.privacy-list li { margin-bottom: 14px; color: var(--text); font-size: 15px; }

/* -- footer -- */
.site-footer { border-top: 1px solid var(--line); background: var(--bg-alt); padding: 44px 0 24px; margin-top: 20px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 24px; }
.footer-tagline { color: var(--muted); font-size: 14px; max-width: 280px; margin: 12px 0 0; }
.footer-col h4 { margin: 0 0 12px; font-size: 14px; color: var(--text); }
.footer-col a { display: block; color: var(--muted); font-size: 14px; padding: 4px 0; }
.footer-col a:hover { color: var(--accent); }
.footer-bottom {
    display: flex; justify-content: space-between; align-items: center;
    margin-top: 32px; padding-top: 18px; border-top: 1px solid var(--line);
    color: var(--muted); font-size: 13px;
}
.footer-ver { font-family: var(--mono); }

/* -- responsive -- */
@media (max-width: 900px) {
    .steps, .cards { grid-template-columns: repeat(2, 1fr); }
    .download-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
    .nav-toggle { display: flex; }
    .site-nav {
        position: absolute; top: 62px; left: 0; right: 0;
        flex-direction: column; align-items: stretch; gap: 2px; padding: 12px 18px 18px;
        background: var(--bg-alt); border-bottom: 1px solid var(--line);
        display: none;
    }
    .site-nav.open { display: flex; }
    .site-nav > a { padding: 12px; }
    .nav-cta { margin: 8px 0 0; }
    .lang-switch { align-self: flex-start; }
    .shots { grid-template-columns: 1fr; }
    .hero { padding: 56px 0 44px; }
}
@media (max-width: 480px) {
    .steps, .cards, .footer-grid { grid-template-columns: 1fr; }
}