/* Stackline — Design System v1
 * Standalone demo. No Tailwind, no shared components.
 * Reference: docs/demos/stackline-DESIGN_SYSTEM.md
 */

:root {
  /* Accent */
  --accent: #FF4F00;
  --accent-deep: #D63E00;
  --accent-soft: #FFE6D8;

  /* Paper */
  --paper: #F5F1E8;
  --paper-2: #EAE4D5;
  --paper-3: #FFFFFF;

  /* Ink */
  --ink: #0E0E0C;
  --ink-2: #1A1A18;
  --ink-3: #2A2A26;

  /* Text */
  --text: #0E0E0C;
  --text-muted: #5C5A52;
  --text-soft: #8A887F;
  --text-invert: #F5F1E8;
  --muted-invert: rgba(245, 241, 232, 0.72);

  /* Lines */
  --line: rgba(14, 14, 12, 0.12);
  --line-strong: rgba(14, 14, 12, 0.22);
  --line-invert: rgba(245, 241, 232, 0.14);

  /* Radii */
  --r-sm: 6px;
  --r-md: 12px;
  --r-lg: 18px;
  --r-pill: 999px;

  /* Type */
  --display: "Space Grotesk", system-ui, sans-serif;
  --body: "Inter", system-ui, sans-serif;

  /* Motion */
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  background: var(--paper);
  color: var(--text);
  font-family: var(--body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, video { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; padding: 0; margin: 0; }
button { font: inherit; cursor: pointer; }

.container {
  width: min(1360px, calc(100% - 56px));
  margin: 0 auto;
}

/* ─── Type ─────────────────────────────────────────────── */
.display {
  font-family: var(--display);
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.028em;
  line-height: 1.02;
  margin: 0;
  font-size: clamp(34px, 4.8vw, 80px);
}
.display--hero { font-size: clamp(40px, 6.2vw, 104px); line-height: 0.98; letter-spacing: -0.03em; }
.display--mission { font-size: clamp(40px, 5.6vw, 96px); line-height: 1.0; letter-spacing: -0.03em; }
.display--feature { font-size: clamp(32px, 3.6vw, 56px); }
.display--cta { font-size: clamp(40px, 5.2vw, 88px); letter-spacing: -0.03em; }
.display--footer { font-size: clamp(48px, 7vw, 128px); letter-spacing: -0.035em; line-height: 0.96; }
.accent { color: var(--accent); }

.lede {
  font-family: var(--body);
  font-size: clamp(15px, 1.05vw, 17px);
  color: var(--text-muted);
  max-width: 56ch;
  margin: 0;
}
.lede--invert { color: var(--muted-invert); }

.kicker {
  font-family: var(--display);
  font-weight: 500;
  font-size: 12px;
  line-height: 1.2;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-muted);
  display: inline-block;
}
.kicker--invert { color: var(--muted-invert); }

/* ─── Buttons ──────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  height: 44px;
  padding: 0 6px 0 20px;
  border-radius: var(--r-pill);
  font-family: var(--display);
  font-size: 13px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 600;
  transition: transform 280ms var(--ease), background 280ms var(--ease), color 280ms var(--ease), border-color 280ms var(--ease);
  border: 1px solid transparent;
  white-space: nowrap;
}
.btn--sm { height: 38px; font-size: 12px; padding: 0 6px 0 16px; }
.btn--primary { background: var(--accent); color: #fff; }
.btn--primary:hover { background: var(--accent-deep); transform: translateY(-1px); }
.btn--ghost { background: transparent; color: var(--ink); border-color: var(--line-strong); }
.btn--ghost:hover { border-color: var(--ink); transform: translateY(-1px); }
.btn--ghost-inv { background: transparent; color: var(--text-invert); border-color: var(--line-invert); }
.btn--ghost-inv:hover { border-color: var(--text-invert); transform: translateY(-1px); }
.btn--feature { margin-top: 28px; }
.btn--submit { height: 56px; padding: 0 8px 0 28px; font-size: 13px; }

.chip {
  width: 30px;
  height: 30px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-family: var(--body);
}
.btn--sm .chip { width: 26px; height: 26px; font-size: 12px; }
.btn--submit .chip { width: 40px; height: 40px; }
.chip--inverse { background: rgba(255, 255, 255, 0.22); color: #fff; }
.chip--ghost { background: var(--paper-2); color: var(--ink); }
.chip--ghost-inv { background: rgba(245, 241, 232, 0.12); color: var(--text-invert); }
.chip--inline { display: inline-flex; width: 22px; height: 22px; background: var(--paper-2); color: var(--ink); margin-left: 6px; font-size: 11px; }
.chip--inline-inv { display: inline-flex; width: 22px; height: 22px; background: rgba(245, 241, 232, 0.12); color: var(--text-invert); margin-left: 6px; font-size: 11px; }

/* ─── Brand ────────────────────────────────────────────── */
.brand { display: inline-flex; align-items: center; gap: 10px; }
.brand__mark { color: var(--accent); font-size: 18px; line-height: 1; transform: translateY(-1px); }
.brand__name { font-family: var(--display); font-weight: 600; letter-spacing: -0.01em; font-size: 18px; }
.brand--invert .brand__name { color: var(--text-invert); }

/* ─── Top bar ──────────────────────────────────────────── */
.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background 200ms ease, border-color 200ms ease, box-shadow 200ms ease;
}
.topbar.is-scrolled {
  background: var(--paper-3);
  border-bottom-color: var(--line);
  box-shadow: 0 14px 40px -28px rgba(14, 14, 12, 0.35);
}
.topbar__row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
  gap: 32px;
}
.topnav {
  display: flex;
  gap: 28px;
  font-family: var(--display);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.topnav a { transition: color 200ms ease; }
.topnav a:hover { color: var(--text); }
@media (max-width: 880px) {
  .topnav { display: none; }
}

/* ─── Hero ─────────────────────────────────────────────── */
.hero {
  padding: 88px 0 96px;
  min-height: 100vh;
  display: flex;
  align-items: center;
}
.hero__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: stretch;
  width: min(1360px, calc(100% - 56px));
}
@media (max-width: 980px) {
  .hero { min-height: 0; padding: 56px 0 72px; }
  .hero__grid { grid-template-columns: 1fr; gap: 40px; }
}
.hero__media { position: relative; }
.hero__videoframe {
  position: relative;
  border-radius: var(--r-md);
  overflow: hidden;
  background: var(--paper-2);
  aspect-ratio: 4 / 5;
  width: 100%;
  height: 100%;
  min-height: 520px;
}
@media (max-width: 980px) { .hero__videoframe { min-height: 360px; aspect-ratio: 4 / 3; } }
.hero__video {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
}
.hero__playdot {
  position: absolute;
  top: 22px; left: 22px;
  width: 12px; height: 12px;
  border-radius: 999px;
  background: var(--accent);
  box-shadow: 0 0 0 0 rgba(255, 79, 0, 0.45);
  animation: pulse 1.6s ease-in-out infinite;
}
.hero__playlabel {
  position: absolute;
  top: 22px; left: 44px;
  font-family: var(--display);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #fff;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.35);
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(255, 79, 0, 0.45); }
  50% { box-shadow: 0 0 0 10px rgba(255, 79, 0, 0); }
}
@media (prefers-reduced-motion: reduce) { .hero__playdot { animation: none; } }

.hero__copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 28px;
  position: relative;
}
.hero__copy .display { margin-top: 4px; }
.btnrow { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 6px; }
.btnrow--center { justify-content: center; }

.hero__scroll {
  margin-top: 32px;
  display: inline-flex;
  align-items: center;
  gap: 14px;
  font-family: var(--display);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-soft);
}
.hero__scroll-line {
  display: inline-block;
  width: 60px;
  height: 1px;
  background: var(--line-strong);
}

/* ─── Ribbon (discipline strip) ────────────────────────── */
.ribbon {
  background: var(--paper-2);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
  padding: 30px 0;
}
.ribbon__track {
  display: flex;
  gap: 36px;
  align-items: center;
  white-space: nowrap;
  font-family: var(--display);
  font-size: 14px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-muted);
  animation: marquee 60s linear infinite;
  will-change: transform;
}
.ribbon__track span { display: inline-block; }
@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}
@media (prefers-reduced-motion: reduce) { .ribbon__track { animation: none; } }

/* ─── Mission band ─────────────────────────────────────── */
.mission {
  background: var(--ink);
  color: var(--text-invert);
  padding: 160px 0;
}
.mission__inner {
  max-width: 980px;
  margin: 0 auto;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 28px;
}
.display--mission { color: var(--text-invert); }
.display--mission .accent { color: var(--accent); }

/* ─── Section heading ──────────────────────────────────── */
.section-head {
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin-bottom: 64px;
  max-width: 880px;
}
.section-head--split {
  flex-direction: row;
  align-items: flex-end;
  justify-content: space-between;
  max-width: none;
  gap: 40px;
}
.section-head__lede {
  font-size: 16px;
  color: var(--text-muted);
  max-width: 42ch;
  margin: 0;
}
@media (max-width: 720px) {
  .section-head--split { flex-direction: column; align-items: flex-start; }
}

/* ─── Metrics ──────────────────────────────────────────── */
.metrics { padding: 120px 0; }
.metric-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
}
.metric {
  padding: 32px 28px 32px 0;
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 10px;
  position: relative;
}
.metric:last-child { border-right: 0; padding-right: 0; }
.metric__index {
  font-family: var(--display);
  font-size: 14px;
  letter-spacing: 0.08em;
  color: var(--accent);
  font-weight: 600;
}
.metric__num {
  font-family: var(--display);
  font-weight: 600;
  font-size: clamp(64px, 8vw, 144px);
  line-height: 0.95;
  letter-spacing: -0.05em;
  font-variant-numeric: tabular-nums;
  color: var(--text);
}
.metric__label {
  font-family: var(--display);
  font-size: 16px;
  font-weight: 500;
  color: var(--text);
}
.metric__body { color: var(--text-muted); font-size: 14px; max-width: 28ch; }
@media (max-width: 880px) {
  .metric-row { grid-template-columns: 1fr 1fr; }
  .metric { border-right: 0; border-bottom: 1px solid var(--line); padding: 24px 0; }
  .metric:nth-child(odd) { border-right: 1px solid var(--line); padding-right: 24px; }
  .metric:nth-child(even) { padding-left: 24px; }
  .metric:nth-last-child(-n+2) { border-bottom: 0; }
}
@media (max-width: 560px) {
  .metric-row { grid-template-columns: 1fr; }
  .metric, .metric:nth-child(odd), .metric:nth-child(even) {
    border-right: 0; padding: 24px 0; border-bottom: 1px solid var(--line);
  }
  .metric:last-child { border-bottom: 0; }
}

/* ─── Services ─────────────────────────────────────────── */
.services { padding: 120px 0; background: var(--paper); }
.service-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
@media (max-width: 1024px) { .service-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .service-grid { grid-template-columns: 1fr; } }

.service-card { aspect-ratio: 1 / 1; }
.service-card__link {
  position: relative;
  display: block;
  width: 100%;
  height: 100%;
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--paper-2);
}
.service-card__media {
  position: absolute; inset: 0;
  background-size: cover;
  background-position: center;
  transition: transform 700ms var(--ease);
}
.service-card__link:hover .service-card__media { transform: scale(1.04); }
.service-card__body {
  position: absolute; inset: auto 0 0 0;
  padding: 24px;
  color: #fff;
  background: linear-gradient(to top, rgba(0,0,0,0.7) 0%, rgba(0,0,0,0.0) 70%);
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.service-card__index {
  font-family: var(--display);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--accent);
  font-weight: 600;
  transition: transform 280ms var(--ease);
}
.service-card__link:hover .service-card__index { transform: translateX(4px); }
.service-card__title {
  font-family: var(--display);
  font-weight: 600;
  font-size: clamp(20px, 1.6vw, 28px);
  letter-spacing: -0.018em;
  margin: 0;
}
.service-card__tag {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.85);
}

/* ─── Featured project ─────────────────────────────────── */
.feature { padding: 140px 0; }
.feature__grid {
  display: grid;
  grid-template-columns: 7fr 5fr;
  gap: 64px;
  align-items: stretch;
}
@media (max-width: 1024px) {
  .feature__grid { grid-template-columns: 1fr; gap: 40px; }
}
.feature__media {
  position: relative;
  background-size: cover;
  background-position: center;
  border-radius: var(--r-lg);
  min-height: 540px;
  overflow: hidden;
}
.feature__year {
  position: absolute;
  top: 24px; left: 24px;
  font-family: var(--display);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #fff;
  background: rgba(14, 14, 12, 0.55);
  padding: 6px 12px;
  border-radius: var(--r-pill);
  backdrop-filter: blur(6px);
}
.feature__meta {
  background: var(--paper-3);
  border-radius: var(--r-lg);
  padding: 48px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 22px;
}
.feature__lede { font-size: 16px; color: var(--text-muted); margin: 0; }
.ledger { margin: 12px 0 0; }
.ledger__row {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line-strong);
  font-size: 14px;
}
.ledger__row:last-child { border-bottom: 0; }
.ledger dt {
  font-family: var(--display);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-soft);
}
.ledger dd { margin: 0; color: var(--text); font-weight: 500; }

/* ─── CTA band ─────────────────────────────────────────── */
.cta-band {
  position: relative;
  padding: 160px 0;
  background-size: cover;
  background-position: center;
  color: var(--text-invert);
  overflow: hidden;
  isolation: isolate;
}
.cta-band__wash {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(135deg, rgba(255, 79, 0, 0.72) 0%, rgba(255, 79, 0, 0) 55%),
    linear-gradient(to top, rgba(14, 14, 12, 0.55), rgba(14, 14, 12, 0.35));
  z-index: -1;
}
.cta-band__inner {
  max-width: 880px;
  margin: 0 auto;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 26px;
}
.display--cta { color: var(--text-invert); }
.display--cta .accent { color: var(--accent); }

/* ─── Quotes ───────────────────────────────────────────── */
.quotes { padding: 120px 0; background: var(--paper); }
.quote-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
@media (max-width: 980px) { .quote-grid { grid-template-columns: 1fr; } }
.quote-card {
  background: var(--paper-3);
  border-radius: var(--r-lg);
  padding: 36px;
  display: flex;
  flex-direction: column;
  gap: 22px;
  border: 1px solid var(--line);
}
.quote-card__glyph {
  font-family: var(--display);
  font-size: 56px;
  line-height: 0.6;
  color: var(--accent);
}
.quote-card__body {
  font-size: 19px;
  line-height: 1.45;
  letter-spacing: -0.005em;
  color: var(--text);
  margin: 0;
}
.quote-card__rule {
  height: 1px;
  background: var(--line-strong);
  width: 100%;
}
.quote-card__author {
  display: flex;
  align-items: center;
  gap: 14px;
}
.avatar {
  width: 40px;
  height: 40px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-deep);
  font-family: var(--display);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.04em;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.quote-card__name {
  display: block;
  font-family: var(--display);
  font-weight: 600;
  font-size: 14px;
}
.quote-card__role {
  display: block;
  font-size: 12px;
  color: var(--text-soft);
}

/* ─── News ─────────────────────────────────────────────── */
.news { padding: 120px 0 140px; }
.news__all {
  font-family: var(--display);
  font-size: 13px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text);
  display: inline-flex;
  align-items: center;
}
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
@media (max-width: 980px) { .news-grid { grid-template-columns: 1fr; } }
.news-card {}
.news-card__link { display: block; }
.news-card__media {
  width: 100%;
  aspect-ratio: 5 / 4;
  background-size: cover;
  background-position: center;
  border-radius: var(--r-lg);
  overflow: hidden;
  transition: transform 700ms var(--ease);
}
.news-card__link:hover .news-card__media { transform: scale(1.02); }
.news-card__body { padding-top: 22px; }
.news-card__meta {
  font-family: var(--display);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-soft);
}
.news-card__title {
  margin: 12px 0 14px;
  font-family: var(--display);
  font-weight: 600;
  font-size: clamp(20px, 1.6vw, 26px);
  letter-spacing: -0.018em;
  color: var(--text);
}
.news-card__link-cta {
  font-family: var(--display);
  font-size: 13px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text);
  display: inline-flex;
  align-items: center;
  position: relative;
  padding-bottom: 2px;
}
.news-card__link-cta::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 280ms var(--ease);
}
.news-card__link:hover .news-card__link-cta::after { transform: scaleX(1); }

/* ─── Footer ───────────────────────────────────────────── */
.footer {
  background: var(--ink);
  color: var(--text-invert);
  padding: 96px 0 36px;
  border-top: 1px solid var(--line-invert);
}
.footer__row { padding: 24px 0; }
.footer__row--big { padding: 8px 0 64px; }
.display--footer { color: var(--text-invert); }
.display--footer .accent { color: var(--accent); }

.footer__row--news {
  border-top: 1px solid var(--line-invert);
  border-bottom: 1px solid var(--line-invert);
  padding: 36px 0;
}
.newsletter { display: flex; flex-direction: column; gap: 14px; max-width: 640px; }
.newsletter__field {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--ink-2);
  border-radius: var(--r-pill);
  padding: 8px 8px 8px 24px;
  border: 1px solid var(--line-invert);
}
.newsletter__field input {
  flex: 1;
  background: transparent;
  border: 0;
  outline: 0;
  color: var(--text-invert);
  font-family: var(--body);
  font-size: 15px;
  padding: 14px 0;
}
.newsletter__field input::placeholder { color: var(--muted-invert); }

.footer__row--cols {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 48px;
  padding: 56px 0;
}
@media (max-width: 880px) {
  .footer__row--cols { grid-template-columns: 1fr 1fr; gap: 36px; }
}
@media (max-width: 560px) {
  .footer__row--cols { grid-template-columns: 1fr; }
}
.footer__address { color: var(--muted-invert); font-size: 14px; margin-top: 18px; }
.footer__col { display: flex; flex-direction: column; gap: 16px; }
.footer__col ul { display: flex; flex-direction: column; gap: 10px; font-size: 14px; }
.footer__col a { color: var(--muted-invert); transition: color 200ms ease; }
.footer__col a:hover { color: var(--text-invert); }
.footer__social a { display: inline-flex; align-items: center; }

.footer__row--mini {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--line-invert);
  padding: 28px 0 0;
  font-size: 12px;
  color: var(--muted-invert);
  font-family: var(--display);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.footer__top {
  display: inline-flex;
  align-items: center;
  color: var(--text-invert);
}

/* ─── Reveal on scroll ─────────────────────────────────── */
[data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 720ms var(--ease), transform 720ms var(--ease);
}
[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}
@media (prefers-reduced-motion: reduce) {
  [data-reveal] { opacity: 1; transform: none; transition: none; }
}