/* ============================================================
   Fish Flight School
   Bright light-blue sky, white clouds, dark legible serif ink.
   The live altimeter is the hero centerpiece.
   ============================================================ */
:root {
  --sky:       oklch(86% 0.085 228);
  --sky-deep:  oklch(42% 0.120 240);
  --sky-pale:  oklch(95% 0.030 225);
  --sky-mid:   oklch(68% 0.090 228);
  --navy:      oklch(24% 0.060 240);
  --navy-2:    oklch(30% 0.055 238);
  --ivory:     oklch(98% 0.008 90);

  --ink:       oklch(24% 0.045 250);
  --ink-soft:  oklch(38% 0.050 248);
  --ink-dim:   oklch(48% 0.045 245);

  --warm-accent: oklch(78% 0.140 60);
  --cool-accent: oklch(72% 0.110 230);

  --s1:4px; --s2:8px; --s3:12px; --s4:16px;
  --s5:24px; --s6:36px; --s7:56px; --s8:84px; --s9:128px;

  --serif: 'EB Garamond', Georgia, serif;
  --sans:  'Archivo', system-ui, sans-serif;
  --ease:  cubic-bezier(0.22, 1, 0.36, 1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--sans);
  color: var(--ink);
  line-height: 1.6;
  background: var(--sky);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { text-decoration: none; color: inherit; }

/* ---- The sky: one bright light-blue column behind everything ---- */
.sky { position: fixed; inset: 0; z-index: -2; overflow: hidden; }
.sky::before {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(
    180deg,
    oklch(78% 0.105 230) 0%,
    oklch(86% 0.080 226) 42%,
    oklch(93% 0.045 222) 74%,
    var(--ivory) 100%
  );
}
/* Fluffy white clouds */
.cloud {
  position: absolute; background: white; border-radius: 60px;
  opacity: 0.92; filter: blur(0.5px);
  animation: drift 60s linear infinite;
}
.cloud::before, .cloud::after {
  content: ''; position: absolute; background: white; border-radius: 50%;
}
.cloud-1 { width: 230px; height: 56px; top: 14%; left: 6%; }
.cloud-1::before { width: 92px; height: 92px; top: -46px; left: 34px; }
.cloud-1::after  { width: 68px; height: 68px; top: -32px; left: 104px; }
.cloud-2 { width: 300px; height: 64px; top: 30%; right: 7%; opacity: 0.8; animation-duration: 84s; }
.cloud-2::before { width: 112px; height: 112px; top: -60px; left: 58px; }
.cloud-2::after  { width: 84px; height: 84px; top: -44px; left: 158px; }
.cloud-3 { width: 170px; height: 44px; top: 62%; left: 12%; opacity: 0.65; animation-duration: 72s; }
.cloud-3::before { width: 66px; height: 66px; top: -34px; left: 28px; }
.cloud-3::after  { width: 54px; height: 54px; top: -26px; left: 78px; }
@keyframes drift { from { transform: translateX(-3vw); } to { transform: translateX(3vw); } }
@media (prefers-reduced-motion: reduce) { .cloud { animation: none; } }

/* ---- Type scale ---- */
h1 {
  font-family: var(--serif); font-weight: 500;
  font-size: clamp(3rem, 9vw, 6.6rem);
  line-height: 1.02; letter-spacing: -0.02em;
  text-wrap: balance; color: var(--navy);
}
h2 {
  font-family: var(--serif); font-weight: 500;
  font-size: clamp(2.1rem, 5.5vw, 4rem);
  line-height: 1.06; letter-spacing: -0.018em;
  text-wrap: balance; color: var(--navy);
}
h3 {
  font-family: var(--serif); font-weight: 500;
  font-size: 1.65rem; line-height: 1.1; letter-spacing: -0.01em;
  color: var(--navy);
}

.eyebrow {
  font-family: var(--sans); font-size: 0.72rem; font-weight: 700;
  letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--sky-deep); margin-bottom: var(--s5);
}
.eyebrow-dark { color: var(--sky-deep); }

.lead {
  font-size: clamp(1.1rem, 1.8vw, 1.3rem);
  color: var(--ink-soft); max-width: 40ch;
  line-height: 1.5; margin-top: var(--s5);
}
.section-lead {
  font-size: 1.15rem; color: var(--ink-soft);
  max-width: 56ch; margin: var(--s4) auto 0; line-height: 1.55;
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex; align-items: center; gap: 0.5em;
  font-family: var(--sans); font-weight: 600; font-size: 0.95rem;
  padding: 0.95em 1.8em; border-radius: 999px;
  background: var(--sky-deep); color: var(--ivory);
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease), background 0.2s;
  box-shadow: 0 10px 30px oklch(42% 0.12 240 / 0.30);
}
.btn:hover { transform: translateY(-2px); background: var(--navy); box-shadow: 0 16px 40px oklch(42% 0.12 240 / 0.40); }
.btn-quiet {
  display: inline-flex; align-items: center;
  font-weight: 600; font-size: 0.95rem;
  padding: 0.95em 1.4em; border-radius: 999px;
  color: var(--sky-deep); border: 1.5px solid oklch(50% 0.09 238 / 0.45);
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease);
}
.btn-quiet:hover { border-color: var(--sky-deep); background: oklch(98% 0.01 90 / 0.6); }

/* ---- Nav ---- */
.nav {
  position: fixed; inset-block-start: 0; inset-inline: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  padding: var(--s4) clamp(var(--s5), 5vw, var(--s8));
}
.brand {
  font-family: var(--serif); font-size: 1.3rem; font-weight: 500;
  letter-spacing: 0.01em; color: var(--navy);
}
.nav-cta {
  font-family: var(--sans); font-weight: 700; font-size: 0.82rem;
  letter-spacing: 0.12em; text-transform: uppercase;
  padding: 0.55em 1.3em; border-radius: 999px;
  background: var(--sky-deep); color: var(--ivory);
  transition: background 0.3s var(--ease);
}
.nav-cta:hover { background: var(--navy); }

/* ---- Hero ---- */
.hero {
  position: relative;
  min-height: 100svh;
  padding: clamp(92px, 13vh, 160px) clamp(var(--s5), 6vw, var(--s9)) var(--s7);
  display: flex; flex-direction: column; justify-content: center;
  gap: var(--s8);
}
.hero-grid {
  display: grid; grid-template-columns: 1.1fr 0.9fr;
  gap: clamp(var(--s6), 6vw, var(--s9));
  align-items: center;
}
.hero-copy h1 { margin-top: var(--s3); }
.actions { display: flex; flex-wrap: wrap; gap: var(--s4); margin-top: var(--s7); }

/* ---- The instrument: hero centerpiece ---- */
.instrument {
  background: linear-gradient(165deg, var(--navy-2), var(--navy));
  border: 1px solid oklch(50% 0.06 250 / 0.4);
  border-radius: 20px;
  padding: var(--s5);
  box-shadow:
    0 40px 90px oklch(30% 0.07 250 / 0.35),
    inset 0 1px 0 oklch(80% 0.04 250 / 0.18);
  max-width: 380px; width: 100%; justify-self: end;
}
.inst-cap {
  font-size: 0.68rem; font-weight: 700; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--cool-accent);
  margin-bottom: var(--s4);
}
.inst-body { display: grid; gap: var(--s4); }
.readout { display: flex; align-items: baseline; gap: 0.4em; }
.readout-num {
  font-family: var(--serif); font-weight: 500;
  font-size: clamp(3rem, 7vw, 4.4rem); line-height: 0.9;
  color: var(--sky); font-variant-numeric: tabular-nums;
}
.readout-unit { font-size: 1.1rem; color: var(--sky-mid); font-weight: 600; }

/* vertical altitude tape */
.tape {
  position: relative; height: 132px; overflow: hidden;
  border-top: 1px solid oklch(45% 0.05 250 / 0.6);
  border-bottom: 1px solid oklch(45% 0.05 250 / 0.6);
  -webkit-mask-image: linear-gradient(180deg, transparent, oklch(20% 0.04 250) 22%, oklch(20% 0.04 250) 78%, transparent);
          mask-image: linear-gradient(180deg, transparent, oklch(20% 0.04 250) 22%, oklch(20% 0.04 250) 78%, transparent);
}
.tape-strip {
  display: flex; flex-direction: column; gap: 0;
  will-change: transform;
}
.tape-strip span {
  display: flex; align-items: center; justify-content: flex-end;
  height: 28px; padding-right: 38px;
  font-family: var(--sans); font-size: 0.78rem; font-weight: 600;
  letter-spacing: 0.06em; color: oklch(75% 0.04 245);
  border-bottom: 1px solid oklch(45% 0.05 250 / 0.4);
  font-variant-numeric: tabular-nums;
}
.tape-needle {
  position: absolute; top: 50%; right: 0; width: 30px; height: 2px;
  transform: translateY(-50%);
  background: var(--warm-accent);
}
.tape-needle::after {
  content: ""; position: absolute; right: 0; top: 50%;
  width: 0; height: 0; transform: translateY(-50%);
  border-block: 6px solid transparent;
  border-right: 9px solid var(--warm-accent);
}

.inst-meta {
  display: grid; grid-template-columns: 1fr 1fr; gap: var(--s3);
  border-top: 1px solid oklch(45% 0.05 250 / 0.6); padding-top: var(--s4);
}
.inst-meta dt {
  font-size: 0.62rem; font-weight: 700; letter-spacing: 0.16em;
  text-transform: uppercase; color: oklch(70% 0.04 245); margin-bottom: 3px;
}
.inst-meta dd { font-family: var(--serif); font-size: 1.05rem; color: var(--sky); }
.inst-meta dd.ok { color: oklch(82% 0.15 150); }

/* ---- Stats strip ---- */
.stats {
  display: flex; flex-wrap: wrap; gap: clamp(var(--s6), 8vw, var(--s9));
  padding-top: var(--s7);
  border-top: 1px solid oklch(40% 0.08 240 / 0.22);
}
.stats dt {
  font-family: var(--serif); font-weight: 500;
  font-size: clamp(2rem, 4vw, 2.8rem); line-height: 1;
  color: var(--navy); font-variant-numeric: tabular-nums;
}
.stats dd {
  font-size: 0.82rem; letter-spacing: 0.04em; color: var(--ink-dim);
  margin-top: var(--s2); max-width: 14ch;
}

/* ---- Curriculum ---- */
.curriculum {
  padding: var(--s9) clamp(var(--s5), 6vw, var(--s9)) var(--s8);
  text-align: center;
}
.courses {
  list-style: none; counter-reset: course;
  display: grid; gap: var(--s4);
  max-width: 880px; margin: var(--s8) auto 0;
}
.course {
  counter-increment: course;
  display: grid; grid-template-columns: auto 1fr; gap: var(--s5);
  align-items: center; text-align: left;
  padding: var(--s5) var(--s6);
  border-radius: 18px;
  background: oklch(100% 0 0 / 0.55);
  border: 1px solid oklch(60% 0.06 235 / 0.30);
  box-shadow: 0 8px 24px oklch(42% 0.10 240 / 0.10);
  transition: background 0.3s var(--ease), transform 0.3s var(--ease);
}
.course::before {
  content: counter(course, decimal-leading-zero);
  font-family: var(--serif); font-size: 2.4rem; font-weight: 500;
  color: var(--sky-mid); line-height: 1;
}
.course:hover { background: oklch(100% 0 0 / 0.8); transform: translateX(4px); }
.course > div, .course h3, .course p { grid-column: 2; }
.course-alt {
  display: inline-block; grid-column: 2;
  font-size: 0.66rem; font-weight: 700; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--sky-deep);
  margin-bottom: var(--s2);
}
.course h3 { margin-bottom: var(--s2); }
.course p { color: var(--ink-soft); font-size: 1rem; max-width: 50ch; }

/* ---- Testimonial ---- */
.testimonial {
  padding: var(--s8) clamp(var(--s5), 6vw, var(--s8)) var(--s9);
  text-align: center;
}
.testimonial blockquote { max-width: 22ch; margin: 0 auto; }
.testimonial p {
  font-family: var(--serif); font-style: italic; font-weight: 400;
  font-size: clamp(2rem, 5.5vw, 3.6rem); line-height: 1.12;
  letter-spacing: -0.015em; color: var(--navy);
  text-wrap: balance;
}
.testimonial footer {
  font-family: var(--sans); font-size: 0.82rem; font-weight: 700;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--sky-deep); margin-top: var(--s5);
}

/* ---- Enroll ---- */
.enroll {
  padding: var(--s9) clamp(var(--s5), 6vw, var(--s8)) var(--s9);
  text-align: center;
}
.enroll h2 { margin-top: var(--s3); }
.enroll .btn { margin-top: var(--s7); }

/* ---- Footer ---- */
.footer {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: var(--s4);
  padding: var(--s6) clamp(var(--s5), 6vw, var(--s8));
  background: var(--ivory);
  border-top: 1px solid oklch(60% 0.06 235 / 0.25);
}
.brand-foot { color: var(--navy); }
.footer-copy {
  font-size: 0.78rem; letter-spacing: 0.06em; color: var(--ink-dim);
}

/* ---- Entrance motion ---- */
@media (prefers-reduced-motion: no-preference) {
  .hero-copy > *, .instrument, .stats { animation: rise 0.9s var(--ease) both; }
  .hero-copy .eyebrow { animation-delay: 0.05s; }
  .hero-copy h1 { animation-delay: 0.12s; }
  .hero-copy .lead { animation-delay: 0.22s; }
  .hero-copy .actions { animation-delay: 0.32s; }
  .instrument { animation-delay: 0.4s; }
  .stats { animation-delay: 0.52s; }
}
@keyframes rise {
  from { opacity: 0; transform: translateY(22px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ---- Responsive ---- */
@media (max-width: 860px) {
  .hero { gap: var(--s7); justify-content: flex-start; padding-top: clamp(96px, 16vh, 150px); }
  .hero-grid { grid-template-columns: 1fr; gap: var(--s7); }
  .instrument { justify-self: stretch; max-width: 420px; }
  .stats { gap: var(--s6); }
}
@media (max-width: 560px) {
  .course { grid-template-columns: 1fr; gap: var(--s2); padding: var(--s5); }
  .course::before { grid-column: 1; }
  .course > div, .course h3, .course p, .course-alt { grid-column: 1; }
  .stats div { flex: 1 1 40%; }
}