/* ==========================================================
   SKYWARD — concept aircraft design portfolio
   tokens → base → layout → components → utilities
   ========================================================== */

/* ---------- Tokens ---------- */
:root {
  --font-display: 'Manrope', 'Iowan Old Style', Georgia, 'Times New Roman', serif;
  --font-body: 'DM Sans', system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: 'DM Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --step--1: clamp(0.78rem, 0.76rem + 0.1vw, 0.84rem);
  --step-0:  clamp(0.96rem, 0.93rem + 0.14vw, 1.04rem);
  --step-1:  clamp(1.12rem, 1.05rem + 0.33vw, 1.32rem);
  --step-2:  clamp(1.34rem, 1.2rem + 0.66vw, 1.78rem);
  --step-3:  clamp(1.6rem, 1.34rem + 1.25vw, 2.34rem);
  --step-4:  clamp(1.92rem, 1.5rem + 2.1vw, 3.1rem);
  --step-5:  clamp(2.3rem, 1.6rem + 3.5vw, 4.1rem);
  --step-6:  clamp(2.75rem, 1.55rem + 5.9vw, 5.5rem);

  --container: 1150px;
  --gutter: clamp(1.15rem, 4vw, 2.5rem);
  --radius: 12px;
  --radius-lg: 20px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --header-h: 68px;
}

[data-theme='dark'] {
  --bg: #0b1114;
  --bg-elev: #111a1d;
  --bg-elev-2: #192528;
  --line: rgba(226, 240, 230, 0.10);
  --line-strong: rgba(226, 240, 230, 0.22);
  --text: #e9f0e9;
  --text-dim: #a1b2a8;
  --text-faint: #72847a;
  --accent: #72cba8;
  --accent-soft: rgba(114, 203, 168, 0.13);
  --cool: #93c9bb;
  --cool-soft: rgba(147, 201, 187, 0.13);
  --shadow: 0 26px 60px -34px rgba(0, 0, 0, 0.85);
  --grain-opacity: 0.018;
  --veil: linear-gradient(180deg, rgba(11, 17, 20, 0.25) 0%, rgba(11, 17, 20, 0.25) 45%, rgba(11, 17, 20, 0.9) 100%);
}

[data-theme='light'] {
  --bg: #eff3ee;
  --bg-elev: #f8faf6;
  --bg-elev-2: #e5ece5;
  --line: rgba(22, 39, 32, 0.13);
  --line-strong: rgba(22, 39, 32, 0.26);
  --text: #16231e;
  --text-dim: #4e6258;
  --text-faint: #71847a;
  --accent: #24795e;
  --accent-soft: rgba(36, 121, 94, 0.10);
  --cool: #287268;
  --cool-soft: rgba(40, 114, 104, 0.10);
  --shadow: 0 26px 60px -38px rgba(22, 39, 32, 0.28);
  --grain-opacity: 0.012;
  --veil: linear-gradient(180deg, rgba(239, 243, 238, 0.12) 0%, rgba(239, 243, 238, 0.18) 45%, rgba(239, 243, 238, 0.9) 100%);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 18px);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: var(--step-0);
  line-height: 1.68;
  font-weight: 350;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  transition: background-color 0.4s var(--ease), color 0.4s var(--ease);
}

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

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.08;
  margin: 0;
  text-wrap: balance;
}

p { margin: 0 0 1.05em; }
p:last-child { margin-bottom: 0; }

::selection { background: var(--accent); color: var(--bg); }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 3px;
}

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

.skip-link {
  position: absolute; left: 50%; top: 0; transform: translate(-50%, -120%);
  z-index: 200; background: var(--accent); color: var(--bg);
  padding: 0.7rem 1.2rem; border-radius: 0 0 var(--radius) var(--radius);
  font-weight: 600; font-size: var(--step--1); text-decoration: none;
  transition: transform 0.25s var(--ease);
}
.skip-link:focus { transform: translate(-50%, 0); }

/* ---------- Texture + progress ---------- */
.grain {
  position: fixed; inset: 0; z-index: 1; pointer-events: none;
  opacity: var(--grain-opacity);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)'/%3E%3C/svg%3E");
  transition: opacity 0.4s var(--ease);
}

.scroll-progress {
  position: fixed; top: 0; left: 0; right: 0; height: 2px; z-index: 60;
  background: transparent; pointer-events: none;
}
.scroll-progress span {
  display: block; height: 100%; width: 0;
  background: linear-gradient(90deg, var(--accent), var(--cool));
  transition: width 0.1s linear;
}

/* ---------- Layout ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: clamp(4.5rem, 10vw, 8.5rem); position: relative; z-index: 2; }

.section-head { max-width: 68ch; margin-bottom: clamp(2.25rem, 5vw, 3.75rem); }
.section-title { font-size: var(--step-4); margin-top: 0.35rem; }
.section-sub {
  margin-top: 1.1rem; color: var(--text-dim);
  font-size: var(--step-1); max-width: 58ch;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--step--1);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0;
  font-weight: 500;
}
.slash { color: var(--cool); margin-inline: 0.35em; }

.mono { font-family: var(--font-mono); font-size: 0.92em; }
.muted { color: var(--text-faint); font-size: var(--step--1); }

/* ---------- Header ---------- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  transition: background-color 0.35s var(--ease), border-color 0.35s var(--ease), backdrop-filter 0.35s;
  border-bottom: 1px solid transparent;
}
.site-header.is-scrolled {
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom-color: var(--line);
}

.nav {
  position: relative;
  height: var(--header-h);
  display: flex; align-items: center; justify-content: space-between; gap: 1.5rem;
}

.brand {
  display: inline-flex; align-items: center; gap: 0.6rem;
  text-decoration: none; font-weight: 500; letter-spacing: -0.01em;
}
.brand-mark { width: 26px; height: 26px; color: var(--accent); flex: none; }
.brand-text { font-size: var(--step-0); }

.nav-links { display: flex; align-items: center; gap: 1.75rem; list-style: none; margin: 0; padding: 0; }
.nav-links a {
  position: relative; text-decoration: none; color: var(--text-dim);
  font-size: var(--step--1); letter-spacing: 0.02em; padding-block: 0.4rem;
  transition: color 0.25s var(--ease);
}
.nav-links a::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: 0; height: 1px;
  background: var(--accent); transform: scaleX(0); transform-origin: left;
  transition: transform 0.35s var(--ease);
}
.nav-links a:hover { color: var(--text); }
.nav-links a:hover::after, .nav-links a.is-active::after { transform: scaleX(1); }
.nav-links a.is-active { color: var(--text); }

.nav-actions { display: flex; align-items: center; gap: 0.6rem; }

.icon-btn {
  display: inline-grid; place-items: center;
  width: 38px; height: 38px; border-radius: 50%;
  background: transparent; border: 1px solid var(--line);
  color: var(--text-dim); cursor: pointer; padding: 0;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease), background-color 0.25s var(--ease);
}
.icon-btn:hover { color: var(--text); border-color: var(--line-strong); background: var(--bg-elev); }
.icon { width: 17px; height: 17px; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; }
.icon-moon { fill: currentColor; stroke: none; }
[data-theme='dark'] .icon-sun { display: none; }
[data-theme='light'] .icon-moon { display: none; }

.nav-burger { display: none; }
.nav-burger span {
  display: block; width: 15px; height: 1.5px; background: currentColor; border-radius: 2px;
  transition: transform 0.3s var(--ease), opacity 0.2s var(--ease);
}
.nav-burger span + span { margin-top: 4px; }
.nav-burger[aria-expanded='true'] span:first-child { transform: translateY(2.75px) rotate(45deg); }
.nav-burger[aria-expanded='true'] span:last-child { transform: translateY(-2.75px) rotate(-45deg); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
  padding: 0.78rem 1.5rem; border-radius: 999px;
  font-size: var(--step--1); font-weight: 500; letter-spacing: 0.02em;
  text-decoration: none; cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.3s var(--ease), background-color 0.3s var(--ease),
              border-color 0.3s var(--ease), color 0.3s var(--ease);
}
.btn-sm { padding: 0.5rem 1.05rem; font-size: 0.8rem; }
.btn-primary { background: var(--accent); color: #14100a; border-color: var(--accent); }
.btn-primary:hover { transform: translateY(-2px); }
.btn-ghost { background: transparent; color: var(--text); border-color: var(--line-strong); }
.btn-ghost:hover { background: var(--bg-elev); border-color: var(--text-faint); transform: translateY(-2px); }

/* ---------- Hero ---------- */
.hero {
  position: relative; min-height: 100svh;
  display: flex; align-items: center;
  padding-top: calc(var(--header-h) + clamp(2rem, 8vh, 5rem));
  padding-bottom: clamp(3rem, 8vh, 5rem);
  overflow: hidden;
  isolation: isolate;
}
.hero-canvas { position: absolute; inset: 0; width: 100%; height: 100%; z-index: -2; }
.hero-veil { position: absolute; inset: 0; z-index: -1; background: var(--veil); }

.hero-inner { position: relative; z-index: 2; }
.hero-title {
  font-size: var(--step-6);
  margin: 1.1rem 0 0;
  line-height: 0.94;
  letter-spacing: -0.035em;
  font-weight: 300;
}
.hero-title .line { display: block; }
.hero-title .line:last-child { color: var(--accent); font-style: italic; }

.hero-lede {
  margin-top: 1.75rem; max-width: 56ch;
  font-size: var(--step-1); color: var(--text-dim); line-height: 1.6;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 2.25rem; }

.hero-scroll {
  margin-top: clamp(3rem, 9vh, 5.5rem);
  font-family: var(--font-mono); font-size: 0.68rem;
  letter-spacing: 0.28em; text-transform: uppercase; color: var(--text-faint);
  display: flex; align-items: center; gap: 0.85rem;
}
.scroll-line {
  display: block; width: 54px; height: 1px; background: var(--line-strong); position: relative; overflow: hidden;
}
.scroll-line::after {
  content: ''; position: absolute; inset: 0; width: 40%;
  background: var(--accent); animation: sweep 2.6s var(--ease) infinite;
}
@keyframes sweep {
  0% { transform: translateX(-110%); }
  60%, 100% { transform: translateX(260%); }
}

/* ---------- Stats ---------- */
.stats-band {
  position: relative; z-index: 2;
  border-block: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg-elev) 55%, transparent);
}
.stats-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 1px; background: var(--line);
}
.stat {
  background: var(--bg); padding: clamp(1.75rem, 4vw, 2.75rem) clamp(1rem, 2.5vw, 1.75rem);
  display: flex; flex-direction: column; gap: 0.5rem;
}
.stat-num {
  font-family: var(--font-display); font-size: var(--step-4);
  line-height: 1; color: var(--accent); letter-spacing: -0.03em;
}
.stat-label { color: var(--text-dim); font-size: var(--step--1); line-height: 1.45; }

/* ---------- About ---------- */
.about-grid {
  display: grid; grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: clamp(2rem, 6vw, 4.5rem); align-items: start;
}
.about-body { max-width: 62ch; }
.about-body p { color: var(--text-dim); }
.about-body .lede {
  font-size: var(--step-2); line-height: 1.42; color: var(--text);
  font-family: var(--font-display); letter-spacing: -0.01em; margin-bottom: 1.4em;
}
.currently {
  margin-top: 2.25rem; padding-top: 1.5rem; border-top: 1px solid var(--line);
}
.currently h3 {
  font-family: var(--font-mono); font-size: var(--step--1);
  letter-spacing: 0.18em; text-transform: uppercase; color: var(--text-faint);
  font-weight: 500; margin-bottom: 0.9rem;
}
.chips { list-style: none; display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 0; padding: 0; }
.chips li {
  border: 1px solid var(--line); border-radius: 999px;
  padding: 0.35rem 0.85rem; font-size: var(--step--1); color: var(--text-dim);
  background: var(--bg-elev);
}

/* ---------- Panels ---------- */
.panel {
  background: var(--bg-elev); border: 1px solid var(--line);
  border-radius: var(--radius-lg); padding: clamp(1.5rem, 3.5vw, 2.25rem);
}
.panel h3 { font-size: var(--step-2); margin-bottom: 0.6rem; }
.panel p { color: var(--text-dim); }
.panel-head { margin-bottom: 1.5rem; }
.panel-head h3 { margin-bottom: 0.25rem; }
.panel-head p {
  font-family: var(--font-mono); font-size: var(--step--1);
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--text-faint); margin: 0;
}

/* ---------- Work cards ---------- */
.work-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(330px, 1fr));
  gap: clamp(1rem, 2.2vw, 1.5rem);
}
.work-card {
  position: relative; overflow: hidden;
  background: var(--bg-elev); border: 1px solid var(--line);
  border-radius: var(--radius-lg); padding: clamp(1.6rem, 3.5vw, 2.25rem);
  display: flex; flex-direction: column;
  transition: transform 0.5s var(--ease), border-color 0.5s var(--ease), box-shadow 0.5s var(--ease);
}
.work-card::before {
  content: ''; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(460px 240px at 14% -8%, var(--accent-soft), transparent 68%);
  opacity: 0; transition: opacity 0.5s var(--ease);
}
.work-card:hover { transform: translateY(-5px); border-color: var(--line-strong); box-shadow: var(--shadow); }
.work-card:hover::before { opacity: 1; }
.work-index {
  font-family: var(--font-mono); font-size: var(--step--1);
  letter-spacing: 0.16em; color: var(--accent); margin-bottom: 1.5rem;
}
.work-card h3 { font-size: var(--step-3); position: relative; }
.work-role {
  font-family: var(--font-mono); font-size: var(--step--1);
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--cool); margin: 0.5rem 0 1.1rem;
}
.work-card > p { color: var(--text-dim); position: relative; }
.work-facts {
  list-style: none; margin: auto 0 0; padding: 1.25rem 0 0;
  border-top: 1px solid var(--line);
  display: flex; flex-direction: column; gap: 0.55rem; position: relative;
}
.work-facts li { display: flex; justify-content: space-between; gap: 1rem; font-size: var(--step--1); }
.work-facts span { color: var(--text-faint); letter-spacing: 0.04em; }
.work-facts li { color: var(--text-dim); }

/* ---------- Music ---------- */
.music-grid {
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  gap: clamp(2rem, 5vw, 4rem); align-items: start; margin-bottom: clamp(2.5rem, 6vw, 4rem);
}
.music-lead h3 { font-size: var(--step-3); margin-bottom: 1rem; }
.music-lead p { color: var(--text-dim); }
.pull {
  margin: 1.75rem 0 0; padding-left: 1.25rem;
  border-left: 2px solid var(--accent);
  font-family: var(--font-display); font-size: var(--step-1);
  line-height: 1.45; color: var(--text); font-style: italic;
}

.albums { display: flex; flex-direction: column; gap: 1rem; }
.album {
  background: var(--bg-elev); border: 1px solid var(--line);
  border-radius: var(--radius-lg); padding: clamp(1.4rem, 3vw, 1.9rem);
  transition: border-color 0.4s var(--ease), transform 0.4s var(--ease);
}
.album:hover { border-color: var(--line-strong); transform: translateX(4px); }
.album-artist {
  font-family: var(--font-mono); font-size: var(--step--1);
  letter-spacing: 0.16em; text-transform: uppercase; color: var(--cool); margin: 0 0 0.45rem;
}
.album-title { font-size: var(--step-2); margin-bottom: 0.2rem; }
.album-track { font-style: italic; color: var(--accent); margin: 0 0 0.8rem; font-size: var(--step-0); }
.album-note { color: var(--text-dim); font-size: var(--step--1); line-height: 1.6; margin: 0; }
.album-note em { color: var(--text); font-style: italic; }

/* ---------- Ledger table ---------- */
.ledger { margin-top: 0; }
.table-wrap { overflow-x: auto; }
.ledger-table { width: 100%; border-collapse: collapse; min-width: 540px; }
.ledger-table th, .ledger-table td {
  text-align: left; padding: 0.85rem 0.75rem;
  border-bottom: 1px solid var(--line); font-size: var(--step--1);
}
.ledger-table thead th {
  font-family: var(--font-mono); font-size: 0.68rem;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--text-faint); font-weight: 500; border-bottom-color: var(--line-strong);
}
.ledger-table tbody td { color: var(--text-dim); }
.ledger-table tbody td:first-child { color: var(--text); }
.ledger-table .num { text-align: right; }
.ledger-table tfoot th, .ledger-table tfoot td {
  border-bottom: none; border-top: 1px solid var(--line-strong);
  color: var(--text); font-weight: 500; padding-top: 1rem;
}
.ledger-table tbody tr { transition: background-color 0.25s var(--ease); }
.ledger-table tbody tr:hover { background: var(--bg-elev-2); }

.pill {
  display: inline-block; padding: 0.18rem 0.6rem; border-radius: 999px;
  font-family: var(--font-mono); font-size: 0.66rem; letter-spacing: 0.1em;
  text-transform: uppercase; white-space: nowrap;
}
.pill-paid { background: color-mix(in srgb, var(--cool) 16%, transparent); color: var(--cool); }
.pill-open { background: color-mix(in srgb, var(--accent) 16%, transparent); color: var(--accent); }

/* ---------- Engineering ---------- */
.eng-grid {
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(1rem, 2.5vw, 1.5rem); align-items: start;
}
.eng-col { display: flex; flex-direction: column; gap: clamp(1rem, 2.5vw, 1.5rem); }
.spec-list { margin: 0; display: flex; flex-direction: column; }
.spec-list > div {
  display: flex; justify-content: space-between; align-items: baseline; gap: 1.5rem;
  padding: 0.7rem 0; border-bottom: 1px solid var(--line);
}
.spec-list > div:last-child { border-bottom: none; }
.spec-list dt {
  font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--text-faint); flex: none;
}
.spec-list dd {
  margin: 0; text-align: right; color: var(--text); font-size: var(--step-0);
  font-family: var(--font-mono); letter-spacing: -0.01em;
}

/* ---------- Honors ---------- */
.honors { list-style: none; margin: 0; padding: 0; display: grid; gap: 0; }
.honor {
  display: grid; grid-template-columns: 30px minmax(0, 1fr); gap: 1.25rem;
  padding: clamp(1.4rem, 3vw, 1.9rem) 0;
  border-top: 1px solid var(--line);
  align-items: start;
}
.honors li:last-child { border-bottom: 1px solid var(--line); }
.honor-mark {
  width: 11px; height: 11px; border-radius: 50%;
  background: var(--accent); margin-top: 0.55rem;
  box-shadow: 0 0 0 4px var(--accent-soft);
}
.honor h3 { font-size: var(--step-2); margin-bottom: 0.35rem; }
.honor p { color: var(--text-dim); margin: 0; max-width: 60ch; }

/* ---------- Contact ---------- */
.contact { padding-bottom: clamp(3.5rem, 8vw, 6rem); }
.contact-grid {
  margin-top: clamp(2.25rem, 5vw, 3.25rem);
  display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1rem;
}
.contact-card {
  display: flex; flex-direction: column; gap: 0.4rem;
  background: var(--bg-elev); border: 1px solid var(--line);
  border-radius: var(--radius-lg); padding: 1.5rem;
  text-decoration: none; position: relative; overflow: hidden;
  transition: transform 0.4s var(--ease), border-color 0.4s var(--ease), background-color 0.4s var(--ease);
}
.contact-card::after {
  content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 2px;
  background: var(--accent); transform: scaleY(0); transform-origin: top;
  transition: transform 0.4s var(--ease);
}
.contact-card:hover { transform: translateY(-4px); border-color: var(--line-strong); }
.contact-card:hover::after { transform: scaleY(1); }
.contact-label {
  font-family: var(--font-mono); font-size: 0.66rem;
  letter-spacing: 0.18em; text-transform: uppercase; color: var(--text-faint);
}
.contact-value { font-size: var(--step-1); color: var(--text); word-break: break-word; }

/* ---------- Footer ---------- */
.site-footer {
  position: relative; z-index: 2;
  border-top: 1px solid var(--line);
  padding-block: 2rem;
  font-size: var(--step--1); color: var(--text-faint);
}
.footer-inner {
  display: flex; flex-wrap: wrap; gap: 0.75rem 2rem;
  justify-content: space-between; align-items: center;
}
.site-footer a { color: var(--text-dim); text-decoration: none; }
.site-footer a:hover { color: var(--accent); }

/* ---------- Reveal ---------- */
.js .reveal {
  opacity: 0; transform: translateY(16px);
  transition: opacity 0.75s var(--ease), transform 0.75s var(--ease);
}
.js .reveal.is-visible { opacity: 1; transform: none; }
.work-grid .reveal:nth-child(2) { transition-delay: 0.07s; }
.work-grid .reveal:nth-child(3) { transition-delay: 0.14s; }
.work-grid .reveal:nth-child(4) { transition-delay: 0.21s; }
.albums .reveal:nth-child(2) { transition-delay: 0.08s; }
.albums .reveal:nth-child(3) { transition-delay: 0.16s; }
.honors .reveal:nth-child(2) { transition-delay: 0.07s; }
.honors .reveal:nth-child(3) { transition-delay: 0.14s; }
.honors .reveal:nth-child(4) { transition-delay: 0.21s; }
.eng-col .reveal:nth-child(2) { transition-delay: 0.08s; }
.eng-col .reveal:nth-child(3) { transition-delay: 0.16s; }
.stats-grid .reveal:nth-child(2) { transition-delay: 0.07s; }
.stats-grid .reveal:nth-child(3) { transition-delay: 0.14s; }
.stats-grid .reveal:nth-child(4) { transition-delay: 0.21s; }

/* ---------- Responsive ---------- */
@media (max-width: 1000px) {
  .about-grid { grid-template-columns: 1fr; }
  .music-grid { grid-template-columns: 1fr; }
  .eng-grid { grid-template-columns: 1fr; }
}

@media (max-width: 860px) {
  :root { --header-h: 60px; }
  .nav-cta { display: none; }
  .nav-burger { display: inline-grid; }
  .nav-links {
    position: absolute; top: calc(100% + 0.5rem); left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--bg-elev); border: 1px solid var(--line);
    border-radius: var(--radius); padding: 0.5rem;
    box-shadow: var(--shadow);
    opacity: 0; visibility: hidden; transform: translateY(-8px);
    transition: opacity 0.28s var(--ease), transform 0.28s var(--ease), visibility 0.28s;
  }
  .nav-links.is-open { opacity: 1; visibility: visible; transform: none; }
  .nav-links a { display: block; padding: 0.7rem 0.85rem; font-size: var(--step-0); }
  .nav-links a::after { display: none; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 560px) {
  .stats-grid { grid-template-columns: 1fr; }
  .hero-actions .btn { flex: 1 1 auto; }
  .honor { grid-template-columns: 22px minmax(0, 1fr); gap: 0.9rem; }
  .spec-list > div { flex-direction: column; gap: 0.2rem; }
  .spec-list dd { text-align: left; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .js .reveal { opacity: 1; transform: none; }
  .scroll-line::after { display: none; }
}

/* ---------- Print ---------- */
@media print {
  .site-header, .scroll-progress, .grain, .hero-canvas, .hero-veil, .nav { display: none !important; }
  body { background: #fff; color: #000; }
  .hero { min-height: auto; padding-top: 2rem; }
}

/* ---------- SKYWARD aircraft portfolio ---------- */
html { scroll-padding-top: calc(var(--header-h) + 24px); }
body { font-weight: 400; }
.brand { gap: 0.5rem; }
.brand-mark { color: var(--accent); width: 29px; height: 29px; }
.brand-text { font-family: var(--font-display); font-size: 0.92rem; font-weight: 800; letter-spacing: 0.12em; }
.brand-dot { color: var(--accent); }
.nav { gap: 1rem; }
.nav-links { gap: clamp(0.65rem, 1.2vw, 1.2rem); }
.nav-links a { font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.08em; white-space: nowrap; }
.nav-cta { font-size: 0.68rem; white-space: nowrap; }
.btn-primary { color: #092018; font-weight: 700; }
.eyebrow { letter-spacing: 0.13em; }
.air-hero {
  min-height: 760px; min-height: min(900px, 100svh);
  padding-top: calc(var(--header-h) + clamp(3rem, 6vh, 5rem));
  display: flex; flex-direction: column; justify-content: center;
  position: relative; overflow: hidden; isolation: isolate;
  background: radial-gradient(ellipse at 76% 45%, rgba(79, 123, 103, .17), transparent 37%), var(--bg);
}
.air-hero::before {
  content: ''; position: absolute; inset: 0; z-index: -1; opacity: .15;
  background-image: linear-gradient(rgba(172, 203, 182, .12) 1px, transparent 1px), linear-gradient(90deg, rgba(172, 203, 182, .12) 1px, transparent 1px);
  background-size: 68px 68px; mask-image: linear-gradient(90deg, transparent, #000 60%, #000);
}
.air-hero-grid { display: grid; grid-template-columns: minmax(310px, .8fr) minmax(0, 1.2fr); align-items: center; gap: clamp(1rem, 4vw, 4rem); width: 100%; }
.air-hero-copy { z-index: 2; padding-block: 2rem; }
.air-hero-copy .eyebrow { display: flex; align-items: center; gap: .7rem; color: var(--text-dim); }
.status-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 12px var(--accent); }
.air-hero h1 { font-family: var(--font-display); font-size: clamp(3.7rem, 7.4vw, 7rem); line-height: .98; letter-spacing: -.075em; font-weight: 600; margin-top: 1.65rem; }
.air-hero h1 span, .section-heading h2 span, .feature-copy h3 span, .doc-copy h2 span { color: var(--accent); }
.air-hero .hero-lede { max-width: 43ch; margin-top: 1.4rem; font-size: clamp(1.05rem, 1.6vw, 1.22rem); line-height: 1.65; }
.hero-actions { align-items: center; gap: 1.5rem; margin-top: 2rem; }
.text-link { display: inline-flex; align-items: center; gap: .7rem; color: var(--text); font-size: .88rem; text-decoration: none; border-bottom: 1px solid var(--line-strong); padding: .5rem 0; transition: color .25s, border-color .25s; }
.text-link:hover { color: var(--accent); border-color: var(--accent); }
.hero-status { display: flex; flex-direction: column; gap: .35rem; padding-left: .9rem; border-left: 1px solid var(--line-strong); margin-top: 2.7rem; color: var(--text-dim); font-size: .77rem; }
.mono { font-family: var(--font-mono); font-size: .66rem; letter-spacing: .1em; }
.hero-status .mono { color: var(--text-faint); }
.hero-art { position: relative; min-width: 0; min-height: 465px; display: grid; place-items: center; }
.art-grid { position: absolute; inset: 5% -10% 4% 0; opacity: .25; background-image: linear-gradient(rgba(166, 195, 174, .2) 1px, transparent 1px), linear-gradient(90deg, rgba(166, 195, 174, .2) 1px, transparent 1px); background-size: 32px 32px; mask-image: radial-gradient(ellipse, #000 25%, transparent 76%); }
.aircraft-illustration { width: min(115%, 820px); overflow: visible; position: relative; z-index: 1; filter: drop-shadow(0 25px 26px rgba(0,0,0,.26)); }
.art-tag, .art-caption { position: absolute; z-index: 2; color: var(--text-faint); font-size: .57rem; letter-spacing: .12em; }
.art-tag { right: 1rem; top: 1.6rem; }
.art-caption { bottom: 1.3rem; left: 50%; transform: translateX(-50%); display: flex; gap: 1rem; white-space: nowrap; }
.art-caption span:first-child { color: var(--accent); }
.hero-bottom { width: 100%; display: flex; justify-content: space-between; align-items: center; border-top: 1px solid var(--line); padding-top: 1.1rem; margin-top: 1.25rem; color: var(--text-faint); font-size: .62rem; letter-spacing: .12em; }
.hero-bottom a { display: flex; align-items: center; gap: .6rem; text-decoration: none; color: var(--text-dim); font-size: .75rem; letter-spacing: normal; }
.scroll-indicator { width: 1px; height: 24px; background: var(--accent); display: inline-block; }
.section { padding-block: clamp(5rem, 10vw, 9rem); }
.section-heading { max-width: 740px; margin-bottom: clamp(2.25rem, 5vw, 3.7rem); }
.section-heading h2 { font-size: clamp(2.65rem, 5.5vw, 5rem); letter-spacing: -.065em; line-height: 1.03; margin-top: 1rem; font-weight: 600; }
.section-intro { color: var(--text-dim); font-size: 1.02rem; max-width: 56ch; line-height: 1.75; margin-top: 1.2rem; }
.concept-section { background: var(--bg-elev); }
.concept-strip { display: grid; grid-template-columns: repeat(3, 1fr); border: 1px solid var(--line); border-radius: var(--radius-lg); overflow: hidden; }
.concept-strip > div { display: flex; flex-direction: column; gap: .65rem; padding: clamp(1.35rem, 3vw, 2.1rem); border-right: 1px solid var(--line); }
.concept-strip > div:last-child { border: 0; }
.concept-strip .mono { color: var(--accent); font-size: .61rem; }
.concept-strip strong { font-family: var(--font-display); font-size: 1.15rem; font-weight: 600; }
.concept-strip p { color: var(--text-dim); font-size: .84rem; margin: 0; }
.aircraft-section { background: var(--bg); }
.aircraft-subnav { display: flex; flex-wrap: wrap; gap: .5rem; border-bottom: 1px solid var(--line); padding-bottom: 1.25rem; margin-bottom: 3.5rem; }
.aircraft-subnav a { display: flex; gap: .55rem; align-items: center; padding: .65rem .9rem; border: 1px solid var(--line); border-radius: 999px; color: var(--text-dim); font-size: .75rem; text-decoration: none; transition: color .2s, border-color .2s, background .2s; }
.aircraft-subnav a span { color: var(--accent); font-family: var(--font-mono); font-size: .63rem; }
.aircraft-subnav a:hover { color: var(--text); border-color: var(--accent); background: var(--accent-soft); }
.aircraft-feature { display: grid; grid-template-columns: .8fr 1.2fr; gap: clamp(2rem, 7vw, 6rem); align-items: start; margin-bottom: 1.4rem; scroll-margin-top: calc(var(--header-h) + 24px); }
.feature-kicker { color: var(--accent); margin-bottom: 1rem; }
.feature-copy h3 { font-size: clamp(2.3rem, 4vw, 3.7rem); line-height: 1.08; letter-spacing: -.06em; }
.feature-copy > p:not(.mono) { max-width: 44ch; margin-top: 1.1rem; color: var(--text-dim); font-size: .93rem; line-height: 1.75; }
.concept-note { display: block; color: var(--text-faint); font-size: .72rem; line-height: 1.55; max-width: 37ch; margin-top: 1.6rem; }
.concept-note span { color: var(--accent); padding-right: .4rem; }
.spec-panel { border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--bg-elev); padding: clamp(1.4rem, 3vw, 2rem); }
.spec-panel-head { display: flex; justify-content: space-between; align-items: center; padding-bottom: 1rem; border-bottom: 1px solid var(--line-strong); color: var(--text-faint); }
.status-pill { border: 1px solid rgba(114,203,168,.38); border-radius: 999px; padding: .28rem .6rem; color: var(--accent); font: 500 .58rem var(--font-mono); letter-spacing: .07em; }
.air-specs { margin: .5rem 0 0; }
.air-specs > div { min-height: 54px; display: flex; align-items: center; justify-content: space-between; gap: 1rem; border-bottom: 1px solid var(--line); }
.air-specs > div:last-child { border: 0; }
.air-specs dt { color: var(--text-dim); font-size: .82rem; }
.air-specs dd { margin: 0; color: var(--text); font-family: var(--font-mono); font-size: .78rem; text-align: right; }
.air-specs dd small { color: var(--text-faint); font: .62rem var(--font-body); }
.data-disclaimer { padding-top: .9rem; margin: 0; border-top: 1px solid var(--line); color: var(--text-faint); font-size: .67rem; line-height: 1.6; }
.design-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 1rem; }
.design-card { scroll-margin-top: calc(var(--header-h) + 24px); min-height: 330px; padding: clamp(1.4rem, 3vw, 2rem); background: var(--bg-elev); border: 1px solid var(--line); border-radius: var(--radius-lg); display: flex; flex-direction: column; }
.design-card-top { display: flex; justify-content: space-between; color: var(--text-faint); }
.design-card-top > span:last-child { color: var(--accent); font-size: 1.1rem; }
.design-card h3 { font-family: var(--font-display); font-size: 1.8rem; letter-spacing: -.04em; font-weight: 600; margin-top: 1rem; }
.design-card > p { color: var(--text-dim); font-size: .84rem; line-height: 1.7; margin: .6rem 0 1rem; max-width: 58ch; }
.layout-diagram { flex: 1; min-height: 180px; margin-top: .5rem; display: flex; align-items: center; justify-content: space-between; gap: 1rem; border: 1px dashed var(--line-strong); border-radius: 50% / 18%; padding: 1rem; position: relative; }
.cabin-nose, .cabin-tail { color: var(--text-faint); font: .53rem var(--font-mono); letter-spacing: .08em; writing-mode: vertical-rl; }
.cabin-tail { transform: rotate(180deg); }
.seat-map { display: grid; grid-template-columns: 30px 18px 30px; grid-auto-rows: 14px; align-content: center; gap: 4px; }
.seat { background: var(--accent-soft); border: 1px solid rgba(114,203,168,.52); border-radius: 4px 4px 2px 2px; color: var(--accent); text-align: center; font: .48rem/12px var(--font-mono); }
.seat-single { grid-column: 1 / 4; justify-self: center; width: 30px; }
.aisle { border-left: 1px dashed var(--line-strong); margin-inline: auto; }
.flow-diagram { width: 100%; height: auto; margin: auto 0 .2rem; }
.propulsion-chain { display: flex; align-items: center; justify-content: space-between; gap: .5rem; margin: auto 0 1.2rem; }
.propulsion-chain span { flex: 1; padding: .75rem .3rem; border: 1px solid var(--line-strong); border-radius: 8px; text-align: center; color: var(--text); font-size: .68rem; line-height: 1.4; }
.propulsion-chain i { color: var(--accent); font-style: normal; }
.micro-note { color: var(--text-faint); font-size: .55rem; }
.structure-bars { margin: auto 0 1rem; display: grid; gap: .85rem; }
.structure-bars > div { display: grid; grid-template-columns: 100px 1fr; gap: .8rem; align-items: center; color: var(--text-dim); font-size: .72rem; }
.structure-bars i { height: 5px; background: var(--bg-elev-2); border-radius: 5px; overflow: hidden; }
.structure-bars b { display: block; height: 100%; background: linear-gradient(90deg, var(--accent), var(--cool)); border-radius: inherit; }
.performance-section { background: var(--bg-elev); }
.performance-layout, .development-layout { display: grid; grid-template-columns: .9fr 1.1fr; gap: clamp(2rem, 7vw, 6rem); align-items: start; }
.performance-layout .section-heading { margin-bottom: 0; }
.performance-layout .text-link { margin-top: 1rem; }
.target-list { border-top: 1px solid var(--line-strong); }
.target-row { display: grid; grid-template-columns: 32px 1fr auto; align-items: center; gap: .8rem; padding: 1.25rem .2rem; border-bottom: 1px solid var(--line); }
.target-row > .mono { color: var(--accent); }
.target-row strong { font-family: var(--font-display); font-size: 1rem; font-weight: 600; }
.target-row p { color: var(--text-dim); font-size: .76rem; margin: .25rem 0 0; }
.target-tag { color: var(--text-faint); font: .52rem var(--font-mono); letter-spacing: .06em; white-space: nowrap; }
.target-footnote { color: var(--text-faint); font-size: .68rem; line-height: 1.6; margin-top: .9rem; }
.simulation-section { background: var(--bg); }
.simulation-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.sim-card { min-height: 280px; padding: 1.55rem; background: var(--bg-elev); border: 1px solid var(--line); border-radius: var(--radius-lg); display: flex; flex-direction: column; }
.sim-number { color: var(--accent); font: 2.25rem/1 var(--font-display); margin-bottom: 1.5rem; }
.sim-card > .mono { color: var(--text-faint); font-size: .56rem; }
.sim-card h3 { font-size: 1.35rem; font-weight: 600; letter-spacing: -.04em; margin-top: .55rem; }
.sim-card p { color: var(--text-dim); font-size: .78rem; line-height: 1.7; margin: .65rem 0 1rem; }
.sim-status { margin-top: auto; color: var(--text-faint); font: .56rem var(--font-mono); letter-spacing: .08em; }
.sim-status i { display: inline-block; width: 6px; height: 6px; border-radius: 50%; background: var(--accent); margin-right: .4rem; }
.development-section { background: var(--bg-elev); }
.development-layout .section-heading { margin: 0; }
.development-timeline { list-style: none; padding: 0; margin: 0; border-top: 1px solid var(--line-strong); }
.development-timeline li { display: grid; grid-template-columns: 14px 82px 1fr auto; gap: .9rem; align-items: start; padding: 1.3rem 0; border-bottom: 1px solid var(--line); }
.timeline-dot { width: 8px; height: 8px; margin-top: .35rem; border-radius: 50%; border: 1px solid var(--text-faint); }
.timeline-dot.complete { border-color: var(--accent); background: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); }
.development-timeline .mono { color: var(--text-faint); font-size: .54rem; padding-top: .12rem; }
.development-timeline h3 { font-family: var(--font-body); font-size: .88rem; font-weight: 600; letter-spacing: 0; }
.development-timeline p { color: var(--text-dim); font-size: .7rem; line-height: 1.5; margin: .3rem 0 0; }
.phase-state { color: var(--accent); font: .5rem var(--font-mono); white-space: nowrap; padding-top: .15rem; }
.development-timeline li:not(:first-child) .phase-state { color: var(--text-faint); }
.documentation-section { background: var(--bg); padding-bottom: clamp(4rem, 8vw, 7rem); }
.doc-panel { display: grid; grid-template-columns: .8fr 1.2fr; gap: clamp(2rem, 7vw, 6rem); padding: clamp(1.5rem, 5vw, 4rem); background: var(--bg-elev); border: 1px solid var(--line); border-radius: var(--radius-lg); }
.doc-copy h2 { font-family: var(--font-display); font-size: clamp(2.5rem, 4vw, 4rem); line-height: 1.05; letter-spacing: -.06em; font-weight: 600; margin-top: 1rem; }
.doc-copy > p:not(.eyebrow) { color: var(--text-dim); font-size: .87rem; line-height: 1.7; margin: 1rem 0 1.5rem; }
.doc-index { display: flex; flex-direction: column; }
.doc-index > a { display: grid; grid-template-columns: 36px 1fr 20px; gap: .8rem; align-items: center; padding: 1rem 0; border-bottom: 1px solid var(--line); text-decoration: none; font-size: .82rem; }
.doc-index > a > span:first-child { font: .63rem var(--font-mono); color: var(--accent); }
.doc-index > a > span:last-child { color: var(--text-faint); }
.doc-index > a:hover strong { color: var(--accent); }
.doc-disclaimer { color: var(--text-faint); font-size: .67rem; line-height: 1.65; margin: 1.2rem 0 0; }
.footer-brand { color: var(--text); }
.site-footer { background: var(--bg); }
.footer-inner { gap: 1rem; }
.footer-inner .mono { color: var(--text-faint); font-size: .58rem; }
.js .reveal { transition: opacity .65s var(--ease), transform .65s var(--ease); }

@media (max-width: 1120px) {
  .nav { gap: .55rem; }
  .nav-links { gap: .65rem; }
  .nav-links a { font-size: .61rem; }
  .brand-text { font-size: .8rem; }
  .brand-mark { width: 25px; height: 25px; }
  .nav-cta { padding-inline: .7rem; }
}
@media (max-width: 940px) {
  .nav-links { gap: .55rem; }
  .nav-links a { font-size: .56rem; letter-spacing: .05em; }
  .nav-cta { display: none; }
  .air-hero-grid { grid-template-columns: 1fr 1.1fr; gap: .5rem; }
  .air-hero h1 { font-size: clamp(3.5rem, 8vw, 5.5rem); }
  .aircraft-feature { grid-template-columns: 1fr 1.2fr; gap: 2rem; }
}
@media (max-width: 860px) {
  .nav { gap: 1rem; }
  .nav-links {
    position: absolute; top: calc(100% + .5rem); left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--bg-elev); border: 1px solid var(--line); border-radius: var(--radius);
    padding: .5rem; box-shadow: var(--shadow); opacity: 0; visibility: hidden; transform: translateY(-8px);
    transition: opacity .28s var(--ease), transform .28s var(--ease), visibility .28s;
  }
  .nav-links.is-open { opacity: 1; visibility: visible; transform: none; }
  .nav-links a { display: block; padding: .7rem .85rem; font-size: .78rem; }
  .nav-links a::after { display: none; }
  .nav-burger { display: inline-grid; }
  .air-hero { min-height: auto; padding-bottom: 2rem; }
  .air-hero-grid { grid-template-columns: 1fr; }
  .air-hero-copy { padding-block: 2.5rem 0; }
  .air-hero h1 { font-size: clamp(4rem, 11vw, 6.5rem); }
  .hero-art { min-height: 350px; }
  .aircraft-illustration { width: min(100%, 720px); }
  .hero-bottom { margin-top: .5rem; }
}
@media (max-width: 700px) {
  .concept-strip { grid-template-columns: 1fr; }
  .concept-strip > div { border-right: 0; border-bottom: 1px solid var(--line); }
  .aircraft-feature, .performance-layout, .development-layout, .doc-panel { grid-template-columns: 1fr; }
  .aircraft-feature { gap: 1.5rem; }
  .design-grid, .simulation-grid { grid-template-columns: 1fr; }
  .design-card { min-height: 290px; }
  .performance-layout, .development-layout { gap: 2.5rem; }
  .doc-panel { gap: 2rem; }
}
@media (max-width: 480px) {
  .air-hero h1 { font-size: clamp(3.35rem, 15vw, 5rem); }
  .air-hero .hero-lede { font-size: .97rem; }
  .air-hero-copy .eyebrow { font-size: .57rem; }
  .hero-art { min-height: 270px; margin-inline: -.5rem; }
  .art-tag { top: .5rem; right: .4rem; font-size: .49rem; }
  .art-caption { bottom: .35rem; font-size: .48rem; }
  .hero-bottom > .mono:last-child { display: none; }
  .hero-bottom { justify-content: space-between; }
  .aircraft-subnav { gap: .4rem; }
  .aircraft-subnav a { font-size: .67rem; padding: .55rem .65rem; }
  .air-specs > div { align-items: flex-start; padding-block: .75rem; }
  .air-specs dd { max-width: 55%; }
  .target-row { grid-template-columns: 24px 1fr; }
  .target-tag { grid-column: 2; }
  .development-timeline li { grid-template-columns: 12px 62px 1fr; gap: .6rem; }
  .phase-state { grid-column: 3; }
  .structure-bars > div { grid-template-columns: 82px 1fr; }
  .footer-inner { align-items: flex-start; }
}
@media (prefers-reduced-motion: reduce) {
  .plane-lines { animation: none; }
}
@media print {
  .air-hero { min-height: auto; }
  .air-hero-grid, .aircraft-feature, .performance-layout, .development-layout, .doc-panel { grid-template-columns: 1fr 1fr; }
  .hero-art { min-height: 250px; }
  .section { padding-block: 2rem; break-inside: avoid; }
  .aircraft-subnav { display: none; }
}