/* =====================================================================
   Contract Designer — promotional site (runtime.fr)
   Self-contained, no external dependencies.
   ===================================================================== */

:root {
    --bg:        #080D1A;
    --bg-2:      #0B1224;
    --panel:     #101d38;
    --panel-2:   #0e1830;
    --stroke:    rgba(120, 150, 200, 0.16);
    --stroke-2:  rgba(120, 150, 200, 0.28);
    --text:      #EAF1FB;
    --muted:     #9DB0CC;
    --dim:       #6E7F9C;
    --cy:        #22D3EE;
    --vi:        #7C6CF6;
    --am:        #F59E0B;
    --gr:        #34D399;
    --pk:        #F472B6;
    --bl:        #60A5FA;
    --radius:    18px;
    --radius-sm: 12px;
    --maxw:      1160px;
    --shadow:    0 24px 60px -24px rgba(0,0,0,0.7);
    --grad:      linear-gradient(120deg, #22D3EE 0%, #7C6CF6 100%);
    font-synthesis: none;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: "Segoe UI", Inter, system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
    overflow-x: hidden;
}

/* Ambient background */
body::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -2;
    background:
        radial-gradient(900px 600px at 78% -8%, rgba(124, 108, 246, 0.18), transparent 60%),
        radial-gradient(760px 520px at 8% 4%, rgba(34, 211, 238, 0.14), transparent 58%),
        linear-gradient(180deg, #080D1A 0%, #070B16 100%);
}
body::after {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -1;
    background-image:
        linear-gradient(rgba(120,150,200,0.045) 1px, transparent 1px),
        linear-gradient(90deg, rgba(120,150,200,0.045) 1px, transparent 1px);
    background-size: 64px 64px;
    mask-image: radial-gradient(circle at 50% 30%, #000 0%, transparent 78%);
    -webkit-mask-image: radial-gradient(circle at 50% 30%, #000 0%, transparent 78%);
}

a { color: var(--cy); text-decoration: none; }
a:hover { color: #7ee7f6; }

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

.skip {
    position: absolute; left: -9999px; top: 0; z-index: 100;
    background: var(--cy); color: #04121a; padding: 10px 16px; border-radius: 8px;
}
.skip:focus { left: 16px; top: 16px; }

/* ---- Buttons ---- */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    font-weight: 600; font-size: 15px; line-height: 1;
    padding: 14px 22px; border-radius: 999px; border: 1px solid transparent;
    cursor: pointer; transition: transform .18s ease, box-shadow .18s ease, background .18s ease, border-color .18s ease;
    white-space: nowrap;
}
.btn-sm { padding: 10px 16px; font-size: 14px; }
.btn-lg { padding: 16px 28px; font-size: 16px; }
.btn-primary { background: var(--grad); color: #06121f; box-shadow: 0 12px 30px -12px rgba(34,211,238,0.55); }
.btn-primary:hover { color: #06121f; transform: translateY(-2px); box-shadow: 0 18px 40px -14px rgba(124,108,246,0.6); }
.btn-ghost { background: rgba(255,255,255,0.02); color: var(--text); border-color: var(--stroke-2); }
.btn-ghost:hover { color: var(--text); border-color: var(--cy); transform: translateY(-2px); }

/* ---- Header ---- */
.site-header {
    position: sticky; top: 0; z-index: 50;
    background: transparent;
    transition: background .25s ease, border-color .25s ease, backdrop-filter .25s ease;
    border-bottom: 1px solid transparent;
}
.site-header.scrolled {
    background: rgba(9, 14, 26, 0.72);
    backdrop-filter: saturate(140%) blur(14px);
    -webkit-backdrop-filter: saturate(140%) blur(14px);
    border-bottom-color: var(--stroke);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; gap: 20px; }
.brand { display: inline-flex; align-items: center; gap: 12px; color: var(--text); font-weight: 700; letter-spacing: .2px; }
.brand:hover { color: var(--text); }
.brand-mark { display: inline-flex; filter: drop-shadow(0 6px 14px rgba(34,211,238,.28)); }
.brand-name { font-size: 17px; }

.nav { display: flex; align-items: center; gap: 26px; }
.nav > a { color: var(--muted); font-weight: 500; font-size: 15px; }
.nav > a:hover { color: var(--text); }
.nav .nav-cta { color: #06121f; }
.nav .nav-cta:hover { color: #06121f; }

.nav-toggle { display: none; flex-direction: column; gap: 5px; width: 44px; height: 44px; align-items: center; justify-content: center; background: rgba(255,255,255,.03); border: 1px solid var(--stroke-2); border-radius: 12px; cursor: pointer; }
.nav-toggle span { width: 20px; height: 2px; background: var(--text); border-radius: 2px; transition: transform .2s ease, opacity .2s ease; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---- Hero ---- */
.hero { position: relative; padding: 72px 0 40px; overflow: hidden; }
.hero-glow {
    position: absolute; width: 720px; height: 720px; right: -160px; top: -220px; z-index: 0;
    background: radial-gradient(circle, rgba(124,108,246,.28), transparent 62%);
    filter: blur(10px); pointer-events: none;
}
.hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: 1.05fr .95fr; gap: 48px; align-items: center; }
.eyebrow { display: inline-block; font-size: 13px; font-weight: 700; letter-spacing: .16em; text-transform: uppercase; color: var(--cy); margin-bottom: 18px; }
.hero-copy h1 { font-size: clamp(34px, 5vw, 56px); line-height: 1.06; letter-spacing: -0.02em; margin: 0 0 20px; font-weight: 700; }
.grad { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lead { font-size: clamp(16px, 1.7vw, 19px); color: var(--muted); max-width: 40ch; margin: 0 0 28px; }
.lead strong { color: var(--text); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; }
.hero-actions.center { justify-content: center; }
.hero-badges { list-style: none; display: flex; flex-wrap: wrap; gap: 10px 22px; padding: 0; margin: 26px 0 0; }
.hero-badges li { position: relative; padding-left: 22px; color: var(--muted); font-size: 14px; }
.hero-badges li::before { content: "✓"; position: absolute; left: 0; color: var(--gr); font-weight: 700; }

/* Hero mock card */
.hero-visual { position: relative; }
.mock-card {
    position: relative; border-radius: var(--radius); overflow: hidden;
    background: linear-gradient(160deg, rgba(20,32,60,.96), rgba(12,20,40,.96));
    border: 1px solid var(--stroke-2); box-shadow: var(--shadow);
    transform: rotate(.6deg);
}
.mock-card::before { content: ""; position: absolute; inset: 0; padding: 1px; border-radius: inherit; background: linear-gradient(140deg, rgba(34,211,238,.5), transparent 40%, rgba(124,108,246,.5)); -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0); -webkit-mask-composite: xor; mask-composite: exclude; pointer-events: none; }
.mock-top { display: flex; align-items: center; gap: 8px; padding: 14px 18px; border-bottom: 1px solid var(--stroke); }
.mock-top .dot { width: 10px; height: 10px; border-radius: 50%; background: #2a3b5e; }
.mock-top .dot:nth-child(1){ background:#ff5f57; } .mock-top .dot:nth-child(2){ background:#febc2e; } .mock-top .dot:nth-child(3){ background:#28c840; }
.mock-title { margin-left: 8px; font-size: 13px; color: var(--muted); font-family: ui-monospace, "Cascadia Code", Consolas, monospace; }
.mock-body { padding: 16px 18px; display: grid; gap: 8px; }
.mock-row { display: flex; align-items: center; gap: 10px; margin: 4px 0 2px; }
.mock-row.sub { margin-top: 12px; }
.mock-row .mk { font-weight: 700; }
.mock-row .mut { color: var(--dim); font-size: 12px; margin-left: auto; }
.pill { font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: .05em; padding: 3px 9px; border-radius: 999px; }
.pill-cy { background: rgba(34,211,238,.14); color: var(--cy); }
.pill-vi { background: rgba(124,108,246,.16); color: #b3a8ff; }
.mock-field { display: flex; align-items: center; gap: 10px; padding: 9px 12px; border-radius: 10px; background: rgba(255,255,255,.02); border: 1px solid var(--stroke); font-size: 14px; }
.mock-field .fn { font-weight: 600; }
.mock-field .ft { margin-left: auto; color: var(--muted); font-family: ui-monospace, "Cascadia Code", Consolas, monospace; font-size: 12.5px; }
.mock-field .ok { color: var(--gr); font-weight: 700; }
.mock-field .warn { color: var(--am); font-weight: 800; }
.mock-field.bad { border-color: rgba(245,158,11,.45); background: rgba(245,158,11,.06); }
.mock-foot { display: flex; flex-wrap: wrap; gap: 8px; padding: 14px 18px; border-top: 1px solid var(--stroke); }
.chip { font-size: 12px; color: var(--muted); border: 1px solid var(--stroke-2); border-radius: 999px; padding: 5px 12px; background: rgba(255,255,255,.02); }

/* ---- Sections ---- */
.section { padding: 88px 0; position: relative; }
.section-alt { background: linear-gradient(180deg, rgba(14,24,48,.5), rgba(10,16,32,.2)); border-top: 1px solid var(--stroke); border-bottom: 1px solid var(--stroke); }
.section-head { max-width: 720px; margin: 0 auto 52px; text-align: center; }
.kicker { display: inline-block; font-size: 13px; font-weight: 700; letter-spacing: .16em; text-transform: uppercase; color: var(--cy); margin-bottom: 14px; }
.section-head h2 { font-size: clamp(26px, 3.4vw, 40px); line-height: 1.12; letter-spacing: -0.02em; margin: 0 0 16px; }
.section-sub { color: var(--muted); font-size: clamp(15px, 1.6vw, 18px); margin: 0; }

.grid { display: grid; gap: 22px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

/* Cards */
.card {
    background: linear-gradient(180deg, rgba(18,30,56,.7), rgba(12,20,40,.7));
    border: 1px solid var(--stroke); border-radius: var(--radius); padding: 30px 28px;
    transition: transform .22s ease, border-color .22s ease, box-shadow .22s ease;
}
.card:hover { transform: translateY(-4px); border-color: var(--stroke-2); box-shadow: var(--shadow); }
.card h3 { margin: 6px 0 10px; font-size: 20px; }
.card p { margin: 0; color: var(--muted); font-size: 15.5px; }
.card-ico {
    width: 54px; height: 54px; border-radius: 14px; display: grid; place-items: center; font-size: 26px;
    background: color-mix(in srgb, var(--c) 14%, transparent);
    border: 1px solid color-mix(in srgb, var(--c) 55%, transparent);
    margin-bottom: 18px;
}

/* Pillars */
.pillars .pillar { padding: 30px 28px; border-radius: var(--radius); border: 1px solid var(--stroke); background: rgba(255,255,255,.015); position: relative; }
.pillar-num { font-size: 15px; font-weight: 800; letter-spacing: .1em; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; margin-bottom: 14px; }
.pillar h3 { margin: 0 0 10px; font-size: 21px; }
.pillar p { margin: 0; color: var(--muted); font-size: 15.5px; }

/* Features */
.feature { padding: 26px 24px; border-radius: var(--radius); border: 1px solid var(--stroke); background: linear-gradient(180deg, rgba(18,30,56,.6), rgba(12,20,40,.6)); transition: transform .22s ease, border-color .22s ease, box-shadow .22s ease; }
.feature:hover { transform: translateY(-4px); border-color: var(--stroke-2); box-shadow: var(--shadow); }
.feature-ico { width: 48px; height: 48px; border-radius: 12px; display: grid; place-items: center; font-size: 23px; margin-bottom: 16px; background: color-mix(in srgb, var(--c) 13%, transparent); border: 1px solid color-mix(in srgb, var(--c) 50%, transparent); }
.feature h3 { margin: 0 0 8px; font-size: 18.5px; }
.feature p { margin: 0; color: var(--muted); font-size: 15px; }

/* Outputs */
.outputs { display: grid; grid-template-columns: 320px 1fr; gap: 26px; align-items: stretch; }
.output-core { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 10px; text-align: center; padding: 36px; border-radius: var(--radius); border: 1px solid var(--stroke-2); background: linear-gradient(160deg, rgba(19,33,62,.9), rgba(14,24,48,.9)); box-shadow: var(--shadow); }
.output-core strong { font-size: 22px; }
.output-core .brand-mark.big { margin-bottom: 8px; }
.output-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.output { display: flex; gap: 14px; align-items: flex-start; padding: 20px 20px; border-radius: var(--radius-sm); border: 1px solid var(--stroke); background: rgba(255,255,255,.015); transition: transform .2s ease, border-color .2s ease; }
.output:hover { transform: translateY(-3px); border-color: var(--stroke-2); }
.output .o-ico { font-size: 24px; line-height: 1.2; }
.output h4 { margin: 0 0 4px; font-size: 16.5px; }
.output p { margin: 0; color: var(--muted); font-size: 14px; }

/* Use cases */
.use { padding: 28px 26px; border-radius: var(--radius); border: 1px solid var(--stroke); background: linear-gradient(180deg, rgba(18,30,56,.55), rgba(12,20,40,.55)); position: relative; overflow: hidden; transition: transform .22s ease, border-color .22s ease, box-shadow .22s ease; }
.use::before { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 3px; background: var(--grad); opacity: .8; }
.use:hover { transform: translateY(-4px); border-color: var(--stroke-2); box-shadow: var(--shadow); }
.use h3 { margin: 0 0 10px; font-size: 19px; }
.use p { margin: 0; color: var(--muted); font-size: 15px; }

/* Value band */
.value-band { background: linear-gradient(180deg, rgba(14,24,48,.55), rgba(10,16,32,.25)); border-top: 1px solid var(--stroke); border-bottom: 1px solid var(--stroke); }
.value-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; text-align: center; }
.value { padding: 22px 16px; }
.v-num { display: block; font-size: clamp(24px, 3vw, 34px); font-weight: 800; letter-spacing: -0.01em; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.v-lbl { display: block; color: var(--muted); font-size: 14.5px; margin-top: 6px; }

/* CTA */
.cta { text-align: center; overflow: hidden; }
.cta-glow { position: absolute; inset: 0; z-index: 0; background: radial-gradient(680px 340px at 50% 0%, rgba(34,211,238,.16), transparent 60%), radial-gradient(560px 320px at 70% 100%, rgba(124,108,246,.18), transparent 62%); pointer-events: none; }
.cta-inner { position: relative; z-index: 1; max-width: 760px; }
.cta-note { color: var(--dim); font-size: 14px; margin-top: 20px; font-family: ui-monospace, "Cascadia Code", Consolas, monospace; }

/* Footer */
.site-footer { border-top: 1px solid var(--stroke); padding: 40px 0; background: rgba(7,11,22,.6); }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.footer-brand { display: flex; align-items: center; gap: 12px; }
.footer-brand strong { display: block; font-size: 15px; }
.footer-brand .mut { font-size: 13px; }
.footer-nav { display: flex; flex-wrap: wrap; gap: 8px 22px; }
.footer-nav a { color: var(--muted); font-size: 14px; }
.footer-nav a:hover { color: var(--text); }
.copyright { color: var(--dim); font-size: 13.5px; margin: 0; }
.mut { color: var(--muted); }

/* ---- Reveal animation ---- */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .6s ease, transform .6s ease; will-change: opacity, transform; }
.reveal.in-view { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; transition: none; } }

/* ---- Responsive ---- */
@media (max-width: 960px) {
    .hero-grid { grid-template-columns: 1fr; gap: 40px; }
    .hero-visual { order: -1; max-width: 460px; }
    .grid-3 { grid-template-columns: 1fr 1fr; }
    .outputs { grid-template-columns: 1fr; }
    .output-list { grid-template-columns: 1fr 1fr; }
    .value-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 820px) {
    .nav {
        position: fixed; inset: 72px 0 auto 0;
        flex-direction: column; align-items: stretch; gap: 4px;
        padding: 16px 24px 24px;
        background: rgba(9, 14, 26, 0.96);
        backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
        border-bottom: 1px solid var(--stroke);
        transform: translateY(-12px); opacity: 0; pointer-events: none;
        transition: transform .22s ease, opacity .22s ease;
    }
    .nav.open { transform: none; opacity: 1; pointer-events: auto; }
    .nav > a { padding: 12px 4px; font-size: 16px; border-bottom: 1px solid var(--stroke); }
    .nav .nav-cta { margin-top: 12px; border-bottom: none; }
    .nav-toggle { display: flex; }
}

@media (max-width: 560px) {
    .section { padding: 64px 0; }
    .grid-3 { grid-template-columns: 1fr; }
    .grid-2 { grid-template-columns: 1fr; }
    .output-list { grid-template-columns: 1fr; }
    .value-grid { grid-template-columns: 1fr 1fr; }
    .footer-inner { flex-direction: column; align-items: flex-start; }
}