/* ============================================================
   CONVERGE INTELLIGENCE — site styles v1 (Session ②, 2026-07-02)
   Implements 01-BRAND/tokens.css. Mobile-first; desktop ≥880px.
   ============================================================ */

/* ---------- fonts (self-hosted) ---------- */
@font-face {
  font-family: "InterVariable";
  src: url("/assets/fonts/InterVariable.woff2") format("woff2");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "JetBrains Mono";
  src: url("/assets/fonts/JetBrainsMono-Regular.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "JetBrains Mono";
  src: url("/assets/fonts/JetBrainsMono-Medium.woff2") format("woff2");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

/* ---------- tokens ---------- */
:root {
  --ink: #14181D; --ink-deep: #0B0E12; --ink-2: #3D454F; --ink-3: #5C656F;
  --paper: #FFFFFF; --paper-2: #F6F7F8; --paper-3: #EEF0F2; --hairline: #E3E6E9;
  --signal: #0E7A55; --signal-strong: #0A5C40; --signal-tint: #E9F5F0; --signal-dark: #35D399;
  --panel: #0B0E12; --panel-2: #12161C; --panel-line: #232A33; --panel-text: #E8EBEE; --panel-mut: #8A93A0;
  --warn: #B45309; --error: #B3261E;
  --font-sans: "InterVariable", ui-sans-serif, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --s-1: 4px; --s-2: 8px; --s-3: 12px; --s-4: 16px; --s-5: 24px; --s-6: 32px; --s-7: 48px; --s-8: 64px; --s-9: 96px;
  --section-y: clamp(64px, 9vw, 118px);
  --content-w: 1080px; --prose-w: 680px;
  --r-s: 6px; --r-m: 10px; --r-l: 14px;
  --border: 1px solid var(--hairline);
  --shadow-card: 0 1px 2px rgba(11,14,18,0.05), 0 8px 24px -12px rgba(11,14,18,0.10);
  --ease: cubic-bezier(0.22, 1, 0.36, 1); --dur: 180ms;
}

/* ---------- reset-ish ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 76px; }
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font-family: var(--font-sans); font-size: 16px; line-height: 1.65;
  font-optical-sizing: auto; text-rendering: optimizeLegibility; -webkit-font-smoothing: antialiased;
  overflow-x: clip; /* clip not hidden — hidden breaks position:sticky in Safari */
}
img, svg, video { max-width: 100%; height: auto; display: block; }
a { color: var(--signal); text-decoration: none; }
a:hover { color: var(--signal-strong); }
p { margin: 0 0 1em; }
h1, h2, h3, h4 { margin: 0 0 0.5em; color: var(--ink-deep); font-weight: 640; }
h1 { font-size: clamp(2.05rem, 5.2vw, 3.4rem); letter-spacing: -0.022em; line-height: 1.07; }
h2 { font-size: clamp(1.55rem, 3.4vw, 2.2rem); letter-spacing: -0.017em; line-height: 1.16; font-weight: 620; }
h3 { font-size: 1.31rem; letter-spacing: -0.011em; line-height: 1.25; font-weight: 600; }
strong { font-weight: 620; color: var(--ink-deep); }
::selection { background: var(--signal-tint); }
p a, li a, .a a, .prose a { text-decoration: underline; text-underline-offset: 2.5px; text-decoration-thickness: 1px; text-decoration-color: color-mix(in srgb, var(--signal) 45%, transparent); }
p a:hover, li a:hover, .a a:hover, .prose a:hover { text-decoration-color: var(--signal); }

.wrap { max-width: var(--content-w); margin: 0 auto; padding: 0 20px; }
.prose { max-width: var(--prose-w); }
section { padding: var(--section-y) 0; }
section.alt { background: var(--paper-2); border-top: var(--border); border-bottom: var(--border); }

/* ---------- type helpers ---------- */
.label {
  font-family: var(--font-mono); font-size: 0.78rem; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--ink-3); font-weight: 500; margin-bottom: var(--s-4);
}
.label .tick { color: var(--signal); }
.lead { font-size: 1.155rem; line-height: 1.6; color: var(--ink-2); }
.small { font-size: 0.895rem; line-height: 1.55; color: var(--ink-3); }
.mono { font-family: var(--font-mono); font-size: 0.845rem; }
.num { font-family: var(--font-mono); font-weight: 500; color: var(--ink-deep); }
.sig { color: var(--signal); }

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50; background: rgba(255,255,255,0.86);
  backdrop-filter: saturate(140%) blur(12px); -webkit-backdrop-filter: saturate(140%) blur(12px);
  border-bottom: var(--border);
}
.site-header .bar { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink-deep); font-weight: 620; letter-spacing: -0.015em; font-size: 1.02rem; }
.brand:hover { color: var(--ink-deep); }
.brand .mark { width: 24px; height: 24px; flex: none; }
.brand .dot { animation: pulse 3.2s var(--ease) infinite; transform-origin: center; }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.45; } }
@media (prefers-reduced-motion: reduce) { .brand .dot { animation: none; } }
.nav { display: none; align-items: center; gap: var(--s-5); }
.nav a { color: var(--ink-2); font-size: 0.94rem; font-weight: 500; }
.nav a:hover { color: var(--ink-deep); }
.header-cta { display: flex; align-items: center; gap: var(--s-3); }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-weight: 600; font-size: 0.98rem; line-height: 1; letter-spacing: -0.005em;
  padding: 14px 22px; border-radius: var(--r-s); border: 1px solid transparent;
  cursor: pointer; transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), color var(--dur) var(--ease);
  white-space: nowrap;
}
.btn-primary { background: var(--signal); color: #fff; }
.btn-primary:hover { background: var(--signal-strong); color: #fff; }
.btn-secondary { background: var(--paper); color: var(--ink-deep); border-color: var(--hairline); }
.btn-secondary:hover { border-color: var(--ink-3); color: var(--ink-deep); }
.btn-ghost { background: transparent; color: var(--ink-deep); border-color: var(--hairline); }
.btn-ghost:hover { border-color: var(--ink-3); }
.btn-sm { padding: 9px 14px; font-size: 0.88rem; }

/* ---------- hero ---------- */
.hero { padding: clamp(56px, 8vw, 104px) 0 var(--section-y); }
.hero h1 { max-width: 820px; }
.hero .lead { max-width: 640px; margin-top: var(--s-5); }
.hero-ctas { display: flex; flex-wrap: wrap; gap: var(--s-3); margin-top: var(--s-6); }
.hero .reply-note { margin-top: var(--s-4); }

/* guarantee block (compression line + strip — one unit, never split) */
.guarantee-block {
  margin-top: var(--s-6); border: var(--border); border-radius: var(--r-l);
  background: var(--paper); overflow: hidden; max-width: 860px;
}
.guarantee-block .line {
  padding: 18px 22px 6px; font-size: 1.25rem; font-weight: 620; letter-spacing: -0.014em; color: var(--ink-deep);
}
.guarantee-block .strip {
  padding: 10px 22px 16px; font-family: var(--font-mono); font-size: 0.85rem; color: var(--signal);
  display: flex; flex-wrap: wrap; column-gap: 8px; row-gap: 4px; align-items: baseline;
}
.guarantee-block .strip .arrow { color: var(--ink-3); }
.guarantee-block .terms-note { padding: 0 22px 14px; }

/* ---------- stat row (calm math) ---------- */
.stat-row { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: var(--s-4); margin-top: var(--s-6); max-width: 720px; }
.stat { border-left: 2px solid var(--hairline); padding-left: 14px; }
.stat b { display: block; font-family: var(--font-mono); font-size: 1.5rem; font-weight: 500; color: var(--ink-deep); letter-spacing: -0.02em; }
.stat span { font-size: 0.86rem; color: var(--ink-3); line-height: 1.4; display: block; margin-top: 2px; }

/* ---------- cards ---------- */
.card {
  background: var(--paper); border: var(--border); border-radius: var(--r-m);
  padding: var(--s-6); box-shadow: var(--shadow-card);
}
.card h3 { margin-bottom: var(--s-2); }
.grid-2 { display: grid; gap: var(--s-5); grid-template-columns: 1fr; }
.grid-2 > *, .grid-3 > *, .tier-grid > *, .split > * { min-width: 0; }
.grid-3 { display: grid; gap: var(--s-4); grid-template-columns: 1fr; }

/* tier cards */
.tier-card { position: relative; display: flex; flex-direction: column; gap: var(--s-3); }
.tier-card .price { font-family: var(--font-mono); font-size: 1.06rem; color: var(--ink-deep); font-weight: 500; }
.tier-card .price .unit { color: var(--ink-3); font-size: 0.82rem; }
.tier-card .gname { font-family: var(--font-mono); font-size: 0.78rem; color: var(--signal); letter-spacing: 0.04em; }
.tier-card .foot { margin-top: auto; padding-top: var(--s-3); }
.badge {
  position: absolute; top: -11px; left: 20px; background: var(--signal); color: #fff;
  font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.07em; text-transform: uppercase;
  padding: 4px 10px; border-radius: 100px;
}
.tier-card.recommended { border-color: var(--signal); }
.tier-card.subordinate { background: var(--paper-2); box-shadow: none; }
.tier-card.subordinate .phase { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-3); }

/* ---------- ladder ---------- */
.ladder { counter-reset: step; display: grid; gap: var(--s-4); margin-top: var(--s-6); }
.ladder .step {
  display: grid; grid-template-columns: 44px 1fr; gap: var(--s-4); align-items: start;
  border: var(--border); border-radius: var(--r-m); padding: var(--s-5); background: var(--paper);
}
.ladder .step::before {
  counter-increment: step; content: counter(step);
  font-family: var(--font-mono); font-weight: 500; color: var(--signal);
  border: 1px solid var(--hairline); border-radius: 8px; width: 40px; height: 40px;
  display: flex; align-items: center; justify-content: center; font-size: 1rem;
}
.ladder .step h3 { display: flex; flex-wrap: wrap; gap: 8px 14px; align-items: baseline; }
.ladder .step .price { font-family: var(--font-mono); font-size: 0.95rem; color: var(--signal); font-weight: 500; }

/* ---------- dark instrument panel ---------- */
.panel {
  background: var(--panel); color: var(--panel-text); border-radius: var(--r-l);
  padding: var(--s-6); border: 1px solid var(--panel-line);
}
.panel h3, .panel h2, .panel strong { color: #fff; }
.panel .label { color: var(--panel-mut); }
.panel a { color: var(--signal-dark); }
.panel .mut { color: var(--panel-mut); }
.logline { font-family: var(--font-mono); font-size: 0.83rem; line-height: 1.75; }
.logline .t { color: var(--panel-mut); }
.logline .ok { color: var(--signal-dark); }

/* demo table */
.demo-rows { display: grid; gap: 0; margin-top: var(--s-5); }
.demo-rows .row {
  display: grid; grid-template-columns: 1fr; gap: 4px; padding: 14px 0;
  border-top: 1px solid var(--panel-line);
}
.demo-rows .row .what { color: var(--panel-text); }
.demo-rows .row .proves { font-family: var(--font-mono); font-size: 0.8rem; color: var(--signal-dark); }

/* ---------- pricing table ---------- */
.price-table { width: 100%; border-collapse: collapse; margin-top: var(--s-5); font-size: 0.95rem; }
.price-table th, .price-table td { text-align: left; padding: 13px 14px; border-bottom: var(--border); vertical-align: top; }
.price-table th { font-family: var(--font-mono); font-size: 0.74rem; letter-spacing: 0.07em; text-transform: uppercase; color: var(--ink-3); font-weight: 500; }
.price-table td.p { font-family: var(--font-mono); white-space: nowrap; font-weight: 500; color: var(--ink-deep); }
.price-table td.p .unit { color: var(--signal); font-size: 0.78rem; font-weight: 500; margin-left: 4px; }
.price-table tr.sub td { color: var(--ink-3); background: var(--paper-2); }
.table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }

/* ---------- calculator ---------- */
.calc { border: var(--border); border-radius: var(--r-l); padding: var(--s-6); background: var(--paper); }
.calc .fields { display: grid; gap: var(--s-4); grid-template-columns: 1fr; margin: var(--s-5) 0; }
.calc label { font-size: 0.88rem; color: var(--ink-2); font-weight: 500; display: block; margin-bottom: 6px; }
.calc input[type="number"] {
  width: 100%; padding: 12px 14px; border: var(--border); border-radius: var(--r-s);
  font-family: var(--font-mono); font-size: 1rem; color: var(--ink-deep); background: var(--paper);
}
.calc input:focus { outline: 2px solid var(--signal); outline-offset: 0; border-color: var(--signal); }
.calc .result { border-top: var(--border); padding-top: var(--s-5); }
.calc .result .range { font-family: var(--font-mono); font-size: 1.7rem; font-weight: 500; color: var(--ink-deep); letter-spacing: -0.02em; }

/* ---------- FAQ ---------- */
.faq { max-width: 780px; }
.faq details { border-top: var(--border); }
.faq details:last-child { border-bottom: var(--border); }
.faq summary {
  cursor: pointer; list-style: none; display: flex; justify-content: space-between; gap: var(--s-4);
  padding: 18px 2px; font-weight: 600; color: var(--ink-deep); font-size: 1.02rem;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-family: var(--font-mono); color: var(--ink-3); flex: none; transition: transform var(--dur) var(--ease); }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq .a { padding: 0 2px 20px; color: var(--ink-2); max-width: 700px; }

/* ---------- forms / capture ---------- */
.capture { border: var(--border); border-radius: var(--r-l); background: var(--paper); padding: var(--s-6); box-shadow: var(--shadow-card); }
.capture .fields { display: grid; gap: var(--s-4); grid-template-columns: 1fr; }
.capture label { font-size: 0.88rem; font-weight: 500; color: var(--ink-2); display: block; margin-bottom: 6px; }
.capture .fields > div { min-width: 0; }
.capture input, .capture select {
  min-width: 0;
  width: 100%; padding: 13px 14px; border: var(--border); border-radius: var(--r-s);
  font-family: var(--font-sans); font-size: 1rem; color: var(--ink-deep); background: var(--paper);
  appearance: none; -webkit-appearance: none;
}
.capture select { background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='10' height='6'><path d='M1 1l4 4 4-4' stroke='%236B7480' fill='none' stroke-width='1.5'/></svg>"); background-repeat: no-repeat; background-position: right 14px center; }
.capture input:focus, .capture select:focus { outline: 2px solid var(--signal); outline-offset: 0; border-color: var(--signal); }
.capture .hint { font-size: 0.82rem; color: var(--ink-3); margin-top: 6px; }
.capture .actions { margin-top: var(--s-5); display: flex; flex-direction: column; gap: var(--s-3); }
.capture .status { font-family: var(--font-mono); font-size: 0.84rem; color: var(--ink-3); min-height: 1.2em; }
.capture .status.ok { color: var(--signal); }
.capture .status.err { color: var(--error); }
.field-err { border-color: var(--error) !important; }

/* ---------- career wall ---------- */
.wall { display: flex; flex-wrap: wrap; gap: 10px 12px; margin-top: var(--s-4); }
.wall span {
  font-family: var(--font-mono); font-size: 0.82rem; color: var(--ink-2);
  border: var(--border); border-radius: 100px; padding: 7px 14px; background: var(--paper);
}

/* ---------- credibility wall v2 — the scroll (brand → what he ran → the outcome) ---------- */
.wall2 { position: relative; overflow: hidden; margin-top: var(--s-5); border-top: var(--border); border-bottom: var(--border); }
.wall2::before, .wall2::after { content: ""; position: absolute; top: 0; bottom: 0; width: 48px; z-index: 2; pointer-events: none; }
.wall2::before { left: 0; background: linear-gradient(90deg, var(--paper), rgba(255,255,255,0)); }
.wall2::after { right: 0; background: linear-gradient(270deg, var(--paper), rgba(255,255,255,0)); }
.wall2 .track { display: flex; width: max-content; animation: wall-scroll 72s linear infinite; }
.wall2:hover .track, .wall2:focus-within .track { animation-play-state: paused; }
.wall2 .co { flex: 0 0 auto; width: 330px; padding: var(--s-5); border-left: 1px solid var(--hairline); }
.wall2 .co:first-child { border-left: 0; }
.wall2 .co .name { font-weight: 640; font-size: 1.14rem; letter-spacing: -0.015em; color: var(--ink-deep); line-height: 1.25; }
.wall2 .co .did { font-size: 0.865rem; color: var(--ink-2); margin-top: 8px; line-height: 1.55; }
@keyframes wall-scroll { to { transform: translateX(-50%); } }
@media (prefers-reduced-motion: reduce) {
  .wall2 .track { animation: none; width: auto; flex-wrap: wrap; }
  .wall2 .co { width: 100%; border-left: 0; border-top: 1px solid var(--hairline); }
  .wall2 .co:first-child { border-top: 0; }
  .wall2 .co.dup { display: none; }
  .wall2::before, .wall2::after { display: none; }
}
@media (min-width: 880px) and (prefers-reduced-motion: reduce) { .wall2 .co { width: 50%; } }

/* the About record — same register, static */
.record-grid { display: grid; gap: var(--s-4); grid-template-columns: 1fr; margin-top: var(--s-5); }
.record-grid .co { border: var(--border); border-radius: var(--r-m); padding: var(--s-5); background: var(--paper); }
.record-grid .co .name { font-weight: 640; font-size: 1.05rem; letter-spacing: -0.015em; color: var(--ink-deep); }
.record-grid .co .did { font-size: 0.92rem; color: var(--ink-2); margin-top: 8px; line-height: 1.6; }
@media (min-width: 880px) { .record-grid { grid-template-columns: 1fr 1fr; } }

/* ---------- footer ---------- */
.site-footer { border-top: var(--border); background: var(--paper-2); padding: var(--s-8) 0 var(--s-7); font-size: 0.9rem; color: var(--ink-3); }
.site-footer .cols { display: grid; gap: var(--s-6); grid-template-columns: 1fr; }
.site-footer h4 { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-3); font-weight: 500; }
.site-footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.site-footer a { color: var(--ink-2); }
.site-footer a:hover { color: var(--ink-deep); }
.site-footer .legal { margin-top: var(--s-7); padding-top: var(--s-5); border-top: var(--border); display: flex; flex-wrap: wrap; gap: var(--s-3) var(--s-5); align-items: center; justify-content: space-between; }

/* ---------- utility ---------- */
.divider { height: 1px; background: var(--hairline); border: 0; margin: var(--s-6) 0; }
.center { text-align: center; }
.mt-0 { margin-top: 0; } .mb-0 { margin-bottom: 0; }
.tight { max-width: 780px; }
.reveal { opacity: 0; transform: translateY(14px); transition: opacity 500ms var(--ease), transform 500ms var(--ease); }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; transition: none; } }
.skip-link { position: absolute; left: -9999px; top: 0; background: var(--paper); padding: 10px 16px; z-index: 100; }
.skip-link:focus { left: 12px; top: 12px; }

/* ---------- desktop ---------- */
@media (min-width: 880px) {
  .nav { display: flex; }
  .grid-2 { grid-template-columns: 1fr 1fr; }
  .grid-3 { grid-template-columns: repeat(3, minmax(0,1fr)); }
  .calc .fields { grid-template-columns: repeat(3, minmax(0,1fr)); }
  .capture .fields { grid-template-columns: 1fr 1fr; }
  .capture .fields .full { grid-column: 1 / -1; }
  .capture .actions { flex-direction: row; align-items: center; justify-content: space-between; }
  .demo-rows .row { grid-template-columns: 1.6fr 1fr; gap: var(--s-5); }
  .site-footer .cols { grid-template-columns: 2fr 1fr 1fr 1fr; }
  .split { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: var(--s-8); align-items: start; }
  .tier-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: var(--s-5); }
}
@media (min-width: 1100px) {
  .tier-grid { grid-template-columns: repeat(3, minmax(0,1fr)); }
}
@media (max-width: 879px) {
  .tier-grid { display: grid; gap: var(--s-5); grid-template-columns: 1fr; }
  .stat-row { grid-template-columns: 1fr; gap: var(--s-3); }
  .btn { width: 100%; }
  .header-cta .btn { width: auto; }
  .hero-ctas .btn { width: 100%; }
}