/* ============================================================
   nVES — NVES Co., Ltd. landing page
   Palette, type and motion values taken from the approved
   landing page concept (Concept 01, August 2026).
   ============================================================ */

:root {
  /* Palette */
  --navy-deep: #0A1E32;
  --navy: #12314F;
  --off-white: #F5F2EA;
  --gold: #D9B45C;
  --gold-deep: #C79A3A;
  --river: #4FA6E8;
  --ember: #B4462A;
  --ink: #1C2530;

  --navy-line: rgba(245, 242, 234, 0.14);
  --navy-text-soft: #8AA7C0;
  --light-line: rgba(28, 37, 48, 0.14);
  --light-text-soft: #55636F;

  /* Type */
  --font-display: "Archivo", "Helvetica Neue", Arial, sans-serif;
  --font-body: "Inter", "Segoe UI", Helvetica, Arial, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", Consolas, monospace;

  /* Spacing / layout */
  --shell: 1200px;
  --gutter: clamp(1.25rem, 4vw, 2.5rem);
  --band-y: clamp(3.75rem, 7vw, 7rem);
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --radius: 2px;
}

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

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

body {
  margin: 0;
  background: var(--off-white);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  font-variant-numeric: tabular-nums lining-nums;
}

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

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.012em;
  margin: 0;
}
h1 { font-size: clamp(1.85rem, 3.6vw, 3rem); font-weight: 700; }
h2 { font-size: clamp(1.5rem, 2.9vw, 2.25rem); }
h3 { font-size: clamp(1.125rem, 1.6vw, 1.3rem); }
p  { margin: 0 0 1rem; max-width: 68ch; }

a { color: inherit; }

.shell { width: 100%; max-width: var(--shell); margin: 0 auto; padding: 0 var(--gutter); }
.anchor-target { display: block; }
section[id], #top { scroll-margin-top: 92px; }

.visually-hidden {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap;
}

.skip-link {
  position: absolute; left: 1rem; top: -3rem; z-index: 100;
  background: var(--gold); color: var(--navy-deep);
  padding: 0.5rem 0.9rem; font-size: 0.875rem; font-weight: 600;
  border-radius: var(--radius); transition: top 160ms var(--ease);
}
.skip-link:focus { top: 1rem; }

:where(a, button, input, textarea, [tabindex]):focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}

/* ---------- shared type utilities ---------- */
.mono { font-family: var(--font-mono); font-variant-ligatures: none; }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--gold-deep);
  margin: 0 0 0.9rem;
}
.eyebrow-gold { color: var(--gold); }
.eyebrow-faint { color: var(--navy-text-soft); opacity: 0.85; }

.list-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--light-text-soft);
  margin: 0 0 0.6rem;
}

.river { width: min(320px, 60%); height: auto; margin: 0.5rem 0 1.4rem; overflow: visible; }
.river-section { width: min(220px, 46%); }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-body);
  font-size: 0.9375rem; font-weight: 600;
  padding: 0.85rem 1.4rem;
  border-radius: var(--radius);
  border: 1px solid transparent;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 120ms var(--ease), color 120ms var(--ease), border-color 120ms var(--ease);
}
.btn-sm { padding: 0.6rem 1rem; font-size: 0.875rem; }
.btn-block { width: 100%; }

.btn-primary { background: var(--gold); color: var(--navy-deep); }
.btn-primary:hover, .btn-primary:focus-visible { background: var(--gold-deep); }

.btn-secondary { border-color: rgba(245, 242, 234, 0.45); color: var(--off-white); background: transparent; }
.btn-secondary:hover, .btn-secondary:focus-visible { border-color: var(--off-white); background: rgba(245, 242, 234, 0.06); }

.btn-ghost {
  border-color: rgba(245, 242, 234, 0.3); color: var(--off-white);
  background: transparent; font-weight: 500;
}
.btn-ghost:hover, .btn-ghost:focus-visible { border-color: var(--gold); color: var(--gold); }

/* ============================================================
   HEADER
   ============================================================ */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: var(--navy-deep);
  border-bottom: 1px solid var(--navy-line);
}
.site-header.is-scrolled { border-bottom-color: rgba(217, 180, 92, 0.4); }

.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem;
  min-height: 76px;
  padding-top: 0.6rem; padding-bottom: 0.6rem;
}
.site-header.is-scrolled .header-inner { min-height: 64px; }

.lockup { display: flex; align-items: center; gap: 0.75rem; text-decoration: none; color: var(--off-white); }
.lockup-mark { width: 42px; height: 42px; flex: 0 0 auto; }
.lockup-rule { width: 1px; height: 34px; background: var(--gold-deep); opacity: 0.8; }
.lockup-text { display: block; }
.lockup-word {
  display: block;
  font-family: var(--font-display); font-weight: 700;
  font-size: 1.2rem; letter-spacing: 0.06em; line-height: 1.05;
  color: var(--off-white);
}
.lockup-river { width: 96px; height: 9px; margin: 4px 0 3px; overflow: visible; }
.lockup-sub {
  display: block;
  font-family: var(--font-mono); font-size: 0.625rem;
  letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--navy-text-soft);
}

.site-nav { display: flex; align-items: center; gap: clamp(1rem, 2.4vw, 2rem); }
.site-nav ul { display: flex; align-items: center; gap: clamp(1rem, 2.2vw, 1.9rem); list-style: none; margin: 0; padding: 0; }
.site-nav a {
  font-size: 0.9375rem; text-decoration: none; color: var(--off-white);
  padding: 0.35rem 0; position: relative;
}
.site-nav a::after {
  content: ""; position: absolute; left: 0; bottom: 0; height: 1px; width: 0;
  background: var(--gold); transition: width 120ms var(--ease);
}
.site-nav a:hover::after, .site-nav a:focus-visible::after { width: 100%; }
.site-nav .nav-cta::after { display: none; }
.site-nav .nav-cta { color: var(--navy-deep); white-space: nowrap; }

.menu-toggle {
  display: none; align-items: center; gap: 0.5rem;
  background: transparent; border: 1px solid rgba(245, 242, 234, 0.3);
  border-radius: var(--radius); color: var(--off-white);
  padding: 0.5rem 0.75rem; cursor: pointer;
  font-family: var(--font-mono); font-size: 0.7rem;
  letter-spacing: 0.12em; text-transform: uppercase;
}
.menu-toggle-bars { display: grid; gap: 3px; }
.menu-toggle-bars span { display: block; width: 16px; height: 1.5px; background: currentColor; }

@media (max-width: 900px) {
  .menu-toggle { display: inline-flex; }
  .site-nav {
    position: absolute; left: 0; right: 0; top: 100%;
    display: none; flex-direction: column; align-items: stretch; gap: 0;
    background: var(--navy-deep);
    border-bottom: 1px solid var(--navy-line);
    padding: 0.5rem var(--gutter) 1.5rem;
  }
  .site-nav.is-open { display: flex; }
  .site-nav ul { flex-direction: column; align-items: stretch; gap: 0; }
  .site-nav li { border-top: 1px solid var(--navy-line); }
  .site-nav ul a { display: block; padding: 0.95rem 0; font-size: 1rem; }
  .site-nav .nav-cta { margin-top: 1.1rem; }
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
  background: var(--navy-deep);
  color: var(--off-white);
  padding: clamp(2.75rem, 6vw, 5rem) 0 clamp(3rem, 6vw, 5rem);
  border-bottom: 1px solid var(--navy-line);
}
.hero-grid {
  display: grid; grid-template-columns: 1fr; gap: clamp(2.25rem, 5vw, 4rem);
  align-items: center;
}
@media (min-width: 960px) {
  .hero-grid { grid-template-columns: 1.15fr 0.85fr; }
}
.hero h1 { color: var(--off-white); }
.hero-support { font-size: 1.0625rem; color: #C8D6E3; max-width: 46ch; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin: 1.75rem 0 1rem; }
.hero-note { font-size: 0.875rem; color: var(--navy-text-soft); max-width: 48ch; }

.diagram-frame {
  border: 1px solid var(--navy-line);
  padding: clamp(1rem, 2.4vw, 1.5rem);
  margin: 0;
  background: rgba(18, 49, 79, 0.35);
}
.diagram-frame figcaption { margin-bottom: 1rem; }
.diagram { width: 100%; height: auto; }
.diagram-tag { font-family: var(--font-mono); font-size: 13px; letter-spacing: 0.06em; }
.diagram-label { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.16em; }

/* ============================================================
   BANDS
   ============================================================ */
.band { padding: var(--band-y) 0; }
.band-light { background: var(--off-white); color: var(--ink); }
.band-navy { background: var(--navy); color: var(--off-white); }
.band-navy-deep { background: var(--navy-deep); color: var(--off-white); }
.band-navy h2, .band-navy-deep h2, .band-navy h3, .band-navy-deep h3 { color: var(--off-white); }
.band-navy .section-lede, .band-navy-deep p { color: #C8D6E3; }

.section-head { margin-bottom: clamp(2.25rem, 4.5vw, 3.5rem); max-width: 58ch; }
.section-lede { color: var(--light-text-soft); }

/* ---------- capability bands (alternating, full width) ---------- */
.cap-head-band { padding-bottom: clamp(1rem, 2vw, 1.75rem); }
.cap-head-band .section-head { margin-bottom: 0; }
.band-light + .band-light { border-top: 1px solid var(--light-line); }

.cap-band { padding: clamp(2.5rem, 4.5vw, 4rem) 0; }
.cap-band-grid {
  display: grid; grid-template-columns: 1fr;
  gap: clamp(2rem, 4vw, 4rem);
  align-items: center;
}
@media (min-width: 960px) {
  .cap-band-grid { grid-template-columns: 1.05fr 0.95fr; }
  .cap-band-flip .cap-copy { order: 2; }
  .cap-band-flip .cap-figure { order: 1; }
}

.cap-copy { max-width: 60ch; }
.cap-title {
  font-size: clamp(1.5rem, 2.9vw, 2.1rem);
  color: var(--navy);
  letter-spacing: -0.014em;
}
.band-navy .cap-title { color: var(--off-white); }
.cap-claim {
  font-family: var(--font-display); font-weight: 500;
  font-size: clamp(1rem, 1.5vw, 1.1875rem); color: var(--gold-deep);
  margin: 0.55rem 0 1rem;
}
.cap-claim-gold { color: var(--gold); }
.cap-body { color: var(--light-text-soft); font-size: 1rem; max-width: 52ch; }
.band-navy .cap-body { color: #C8D6E3; }
.band-navy .list-label { color: var(--navy-text-soft); }
.cap-copy .list-label {
  margin-top: 1.6rem; padding-top: 1.1rem;
  border-top: 1px solid var(--light-line);
}
.band-navy .cap-copy .list-label { border-top-color: var(--navy-line); }

.spec-list { list-style: none; margin: 0; padding: 0; }
.spec-list-2 { display: grid; gap: 0 2rem; grid-template-columns: 1fr; }
@media (min-width: 560px) { .spec-list-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.spec-list li {
  position: relative; padding-left: 1.1rem;
  font-size: 0.9375rem; line-height: 1.5;
  margin-bottom: 0.45rem; color: var(--ink);
}
.band-navy .spec-list li { color: #E6EDF4; }
.spec-list li::before {
  content: ""; position: absolute; left: 0; top: 0.72em;
  width: 7px; height: 1px; background: var(--gold-deep);
}
.band-navy .spec-list li::before { background: var(--gold); }

.cap-figure {
  margin: 0;
  border: 1px solid var(--light-line);
  padding: clamp(1rem, 2.4vw, 1.75rem);
  background: rgba(18, 49, 79, 0.03);
}
.band-navy .cap-figure { border-color: var(--navy-line); background: rgba(10, 30, 50, 0.4); }
.cap-art { width: 100%; height: auto; }
.cap-figcaption {
  margin-top: 1rem; font-size: 0.68rem;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--light-text-soft);
}
.band-navy .cap-figcaption { color: var(--navy-text-soft); }
.art-tag { font-family: var(--font-mono); font-size: 13px; letter-spacing: 0.06em; }
.art-label { font-family: var(--font-mono); font-size: 9.5px; letter-spacing: 0.15em; }

/* ---------- steps ---------- */
.steps {
  list-style: none; margin: 0; padding: 0;
  display: grid; gap: clamp(1.25rem, 2.5vw, 1.75rem);
  grid-template-columns: 1fr;
  counter-reset: step;
}
@media (min-width: 720px) { .steps { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1040px) { .steps { grid-template-columns: repeat(4, 1fr); } }

.step {
  border-top: 1px solid rgba(245, 242, 234, 0.22);
  padding-top: 1.25rem;
}
.step-num {
  display: inline-flex; align-items: center; justify-content: center;
  width: 30px; height: 30px; border-radius: 50%;
  border: 1px solid var(--gold);
  color: var(--gold);
  font-family: var(--font-mono); font-size: 0.8rem;
  margin-bottom: 1rem;
}
.step h3 { margin-bottom: 0.6rem; }
.step p { font-size: 0.9375rem; margin: 0; }

/* ---------- coverage ---------- */
.coverage-grid { display: grid; grid-template-columns: 1fr; gap: clamp(2rem, 4vw, 3.5rem); }
@media (min-width: 960px) { .coverage-grid { grid-template-columns: 1.1fr 0.9fr; align-items: start; } }
#coverage h2 { color: var(--navy); max-width: 30ch; }
.coverage-body { color: var(--light-text-soft); font-size: 0.9375rem; }

.coverage-facts { margin: 0; border-top: 1px solid var(--light-line); }
.coverage-facts > div { padding: 1rem 0; border-bottom: 1px solid var(--light-line); }
.coverage-facts dt {
  font-family: var(--font-mono); font-size: 0.72rem;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--gold-deep); margin-bottom: 0.35rem;
}
.coverage-facts dd { margin: 0; font-size: 0.9375rem; color: var(--ink); }

/* ============================================================
   REQUEST / CONTACT
   ============================================================ */
.request-grid { display: grid; grid-template-columns: 1fr; gap: clamp(2rem, 4vw, 3.5rem); }
@media (min-width: 960px) { .request-grid { grid-template-columns: 0.85fr 1.15fr; align-items: start; } }

.request-intro p { font-size: 0.9375rem; }

.notice {
  border-left: 3px solid var(--gold);
  background: rgba(18, 49, 79, 0.6);
  padding: 1rem 1.15rem;
  margin: 1.5rem 0;
}
.notice-title {
  font-size: 0.72rem; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--gold); margin: 0 0 0.45rem;
}
.notice p:last-child { margin: 0; font-size: 0.875rem; }

.domain-copy { margin-top: 2rem; }
.domain-copy .list-label { color: var(--navy-text-soft); }
.domain-value { font-size: 1.0625rem; color: var(--off-white); margin: 0 0 0.85rem; }
.copy-status { font-size: 0.72rem; letter-spacing: 0.1em; color: var(--gold); margin-left: 0.65rem; }

.request-form {
  border: 1px solid var(--navy-line);
  background: rgba(18, 49, 79, 0.45);
  padding: clamp(1.25rem, 3vw, 2rem);
}
.request-form fieldset { border: 0; margin: 0; padding: 0; display: grid; gap: 1.1rem; grid-template-columns: 1fr; }
@media (min-width: 620px) { .request-form fieldset { grid-template-columns: repeat(2, 1fr); } }
.field-wide { grid-column: 1 / -1; }

.field label, .label-static {
  display: block;
  font-family: var(--font-mono); font-size: 0.72rem;
  letter-spacing: 0.13em; text-transform: uppercase;
  color: var(--navy-text-soft); margin-bottom: 0.45rem;
}
.optional { color: var(--gold-deep); letter-spacing: 0.1em; }

.field input, .field textarea {
  width: 100%;
  background: rgba(10, 30, 50, 0.75);
  border: 1px solid rgba(245, 242, 234, 0.2);
  border-radius: var(--radius);
  color: var(--off-white);
  font-family: var(--font-body); font-size: 0.9375rem;
  padding: 0.75rem 0.85rem;
  transition: border-color 120ms var(--ease);
}
.field textarea { resize: vertical; min-height: 96px; }
.field input::placeholder, .field textarea::placeholder { color: rgba(138, 167, 192, 0.75); }
.field input:hover, .field textarea:hover { border-color: rgba(245, 242, 234, 0.35); }
.field input:focus, .field textarea:focus { border-color: var(--gold); outline-offset: 1px; }

.attach {
  display: flex; align-items: center; gap: 0.9rem;
  border: 1px dashed rgba(245, 242, 234, 0.3);
  border-radius: var(--radius);
  padding: 1rem;
  background: rgba(10, 30, 50, 0.5);
}
.attach-icon { width: 26px; height: 26px; color: var(--gold); flex: 0 0 auto; }
.attach-title { margin: 0; font-size: 0.9375rem; color: var(--off-white); }
.attach-hint { margin: 0.25rem 0 0; font-size: 0.7rem; letter-spacing: 0.08em; color: var(--navy-text-soft); }
.attach-state {
  margin-left: auto; font-size: 0.65rem; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--navy-text-soft);
  border: 1px solid rgba(245, 242, 234, 0.22); padding: 0.2rem 0.45rem;
}

@media (max-width: 559px) {
  .attach { flex-wrap: wrap; }
  .attach-state { margin-left: 0; order: 3; flex: 0 0 auto; }
}

.form-footer { margin-top: 1.75rem; }
.btn.is-pending {
  cursor: not-allowed;
  background: transparent;
  color: var(--gold);
  border: 1px dashed rgba(217, 180, 92, 0.65);
  font-family: var(--font-mono);
  font-size: 0.8125rem; font-weight: 500;
  letter-spacing: 0.12em; text-transform: uppercase;
  padding-top: 0.95rem; padding-bottom: 0.95rem;
}
.btn.is-pending:hover { background: transparent; color: var(--gold); }
.form-note { margin: 0.85rem 0 0; font-size: 0.8125rem; color: var(--navy-text-soft); }

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  background: var(--navy);
  color: var(--off-white);
  padding: clamp(2.5rem, 5vw, 4rem) 0 2rem;
  border-top: 1px solid rgba(217, 180, 92, 0.35);
}
.footer-strip {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 1.5rem;
  padding-bottom: 2rem; border-bottom: 1px solid var(--navy-line);
}
.lockup-footer { cursor: default; }

.footer-cols {
  display: grid; grid-template-columns: 1fr; gap: 2rem;
  padding: 2.25rem 0;
}
@media (min-width: 720px) { .footer-cols { grid-template-columns: repeat(3, 1fr); } }
.footer-col .list-label { color: var(--gold); }
.footer-col ul { list-style: none; margin: 0; padding: 0; }
.footer-col li { margin-bottom: 0.55rem; }
.footer-col a {
  font-size: 0.9375rem; text-decoration: none; color: #C8D6E3;
  border-bottom: 1px solid transparent;
  transition: color 120ms var(--ease), border-color 120ms var(--ease);
}
.footer-col a:hover, .footer-col a:focus-visible { color: var(--off-white); border-bottom-color: var(--gold); }
.footer-text { font-size: 0.9375rem; color: #C8D6E3; margin-bottom: 0.5rem; }

.footer-base {
  display: flex; flex-wrap: wrap; gap: 0.75rem 2rem; justify-content: space-between;
  padding-top: 1.5rem; border-top: 1px solid var(--navy-line);
}
.footer-base p {
  margin: 0; font-size: 0.72rem; letter-spacing: 0.1em;
  color: var(--navy-text-soft); text-transform: uppercase;
}

/* ============================================================
   MOTION — one-time reveals, all under 600ms
   ============================================================ */
.js .reveal { opacity: 0; transform: translateY(8px); }
.js .reveal.is-in {
  opacity: 1; transform: none;
  transition: opacity 240ms var(--ease), transform 240ms var(--ease);
}

.js .river path { stroke-dasharray: 400; stroke-dashoffset: 400; }
.js .river.is-drawn path { animation: river-draw 520ms var(--ease) forwards; }
.river.is-drawn path:nth-child(2) { animation-delay: 60ms; }
.river.is-drawn path:nth-child(3) { animation-delay: 120ms; }
.river.is-drawn path:nth-child(4) { animation-delay: 180ms; }
@keyframes river-draw { to { stroke-dashoffset: 0; } }

.lockup-river path, .diagram .river-lines path { stroke-dasharray: none; stroke-dashoffset: 0; }

.js .mark-star { opacity: 0; transform-origin: 66% 20%; }
.js-ready .mark-star { animation: star-reveal 380ms var(--ease) 120ms forwards; }
@keyframes star-reveal {
  from { opacity: 0; transform: scale(0.98); }
  to { opacity: 1; transform: scale(1); }
}

@media (prefers-reduced-motion: reduce) {
  .js .reveal, .js .reveal.is-in { opacity: 1; transform: none; transition: none; }
  .js .river path, .js .river.is-drawn path { stroke-dasharray: none; stroke-dashoffset: 0; animation: none; }
  .js .mark-star, .js.js-ready .mark-star { opacity: 1; animation: none; transform: none; }
  .btn, .site-nav a::after, .footer-col a { transition: none; }
}