/* =========================================================================
   Halcyon — styles.css
   Zero dependencies. Elegant, minimal, gold-on-black — designed around the
   Halcyon gold ring: thin single-weight lines, wide letter-spacing, air.
   All theming lives in :root tokens.
   ========================================================================= */

/* ---- Design tokens ----------------------------------------------------- */
:root {
  /* Colour — true-black + warm gold, matching the Halcyon ring */
  --bg: #000000;
  --surface: #0b0b0e;
  --surface-2: #141419;
  --text: #f5f2ea;
  --muted: #b5afa1;
  --muted-dim: #7d776b;
  /* Accent tokens (names kept generic; values are the gold palette) */
  --cyan: #f6c453;        /* light gold — primary accent */
  --magenta: #e0902b;     /* deep amber */
  --violet: #eeb247;      /* mid gold (gradient bridge) */
  --border: rgba(246, 196, 83, 0.14);
  --border-soft: rgba(246, 196, 83, 0.08);
  --border-strong: rgba(246, 196, 83, 0.30);

  /* Gold gradient + soft washes */
  --neon: linear-gradient(120deg, var(--cyan) 0%, var(--violet) 45%, var(--magenta) 100%);

  /* Reserved glow (used sparingly — like the logo's single glowing O) */
  --glow-gold: 0 0 22px rgba(246, 196, 83, 0.28);

  /* Type — system stack, no webfont request */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
    Arial, "Apple Color Emoji", "Segoe UI Emoji", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

  /* Weights — thin & airy to echo the wordmark */
  --wt-thin: 300;
  --wt-hair: 200;

  /* Spacing / layout */
  --maxw: 1120px;
  --gutter: clamp(1.25rem, 4vw, 2.5rem);
  --radius: 14px;
  --radius-sm: 10px;

  /* Fluid type scale */
  --step--1: clamp(0.8rem, 0.77rem + 0.15vw, 0.88rem);
  --step-0: clamp(1rem, 0.96rem + 0.2vw, 1.08rem);
  --step-1: clamp(1.15rem, 1.05rem + 0.5vw, 1.35rem);
  --step-2: clamp(1.5rem, 1.3rem + 1vw, 2rem);
  --step-3: clamp(1.9rem, 1.5rem + 2vw, 2.9rem);
  --step-4: clamp(2.5rem, 1.9rem + 3vw, 4.25rem);
}

/* ---- Reset / base ------------------------------------------------------ */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font-sans);
  font-size: var(--step-0);
  font-weight: 400;
  line-height: 1.75;
  color: var(--text);
  background-color: var(--bg);
  /* Whisper-quiet warm aurora — calm, mostly black */
  background-image:
    radial-gradient(55% 45% at 12% -8%, rgba(246, 196, 83, 0.06), transparent 60%),
    radial-gradient(50% 40% at 100% 0%, rgba(224, 144, 43, 0.05), transparent 55%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  min-height: 100vh;
}

img, svg { display: block; max-width: 100%; }
a { color: var(--cyan); text-decoration: none; transition: color 0.2s ease; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }

h1, h2, h3, h4 {
  line-height: 1.18;
  font-weight: var(--wt-thin);
  letter-spacing: 0.01em;
}
h1 { font-size: var(--step-4); font-weight: var(--wt-hair); letter-spacing: 0.005em; }
h2 { font-size: var(--step-3); }
h3 { font-size: var(--step-1); font-weight: 400; letter-spacing: 0.02em; }
p { color: var(--muted); font-weight: 400; }
ul { padding-left: 1.1rem; }
strong { font-weight: 600; color: var(--text); }

:focus-visible {
  outline: 1.5px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--surface-2);
  color: var(--text);
  padding: 0.6rem 1rem;
  border-radius: 0 0 var(--radius-sm) 0;
  z-index: 100;
}
.skip-link:focus { left: 0; }

/* ---- Layout helpers ---------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.section { padding-block: clamp(4.5rem, 10vw, 8rem); }
.section--tight { padding-block: clamp(3rem, 6vw, 5rem); }
.stack > * + * { margin-top: 1.15rem; }
.text-center { text-align: center; }

.eyebrow {
  display: inline-block;
  font-size: var(--step--1);
  font-weight: 500;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 1.1rem;
}
.lede { font-size: var(--step-1); font-weight: 300; color: var(--muted); max-width: 60ch; line-height: 1.65; }
.measure { max-width: 62ch; }
.gradient-text { color: var(--cyan); }

/* ---- Wave motif (echoes the logo) -------------------------------------- */
.wave-divider {
  height: 46px;
  width: min(560px, 70%);
  margin: 0 auto;
  background:
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1440 40'%3E%3Cpath d='M0,20 C120,4 240,4 360,20 C480,36 600,36 720,20 C840,4 960,4 1080,20 C1200,36 1320,36 1440,20' fill='none' stroke='%23f6c453' stroke-width='1.5' stroke-opacity='0.55'/%3E%3C/svg%3E")
    no-repeat center / contain;
}

/* ---- Buttons ----------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-weight: 500;
  font-size: var(--step-0);
  letter-spacing: 0.02em;
  padding: 0.85rem 1.6rem;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: box-shadow 0.25s ease, background 0.25s ease, color 0.2s ease, border-color 0.2s ease;
  text-decoration: none;
  white-space: nowrap;
}
.btn:hover { text-decoration: none; }
.btn-primary {
  color: #1a1206;
  background: var(--cyan);
}
.btn-primary:hover { box-shadow: var(--glow-gold); background: #ffd271; }
.btn-ghost {
  color: var(--text);
  background: transparent;
  border-color: var(--border-strong);
}
.btn-ghost:hover { background: rgba(246, 196, 83, 0.06); border-color: var(--cyan); }

/* ---- Header / nav ------------------------------------------------------ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: #000;
  border-bottom: 1px solid var(--border-soft);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 112px;
}
.nav__brand { display: inline-flex; align-items: center; gap: 0.65rem; text-decoration: none; }
.wordmark {
  display: inline-flex;
  align-items: center;
  font-weight: var(--wt-thin);
  letter-spacing: 0;
  font-size: 1.45rem;
  line-height: 1;
  color: var(--text);
}
.wordmark > span:first-child,
.wordmark > span:last-child,
.splash__word > span:first-child,
.splash__word > span:last-child {
  letter-spacing: 0.18em;
}
.wordmark__o,
.splash__o {
  display: inline-block;
  width: 0.68em;
  height: 0.68em;
  margin: 0 0.12em;
  flex-shrink: 0;
  border-radius: 50%;
  border: 0.1em solid var(--cyan);
  box-shadow: 0 0 0.45em rgba(246, 196, 83, 0.7), inset 0 0 0.22em rgba(246, 196, 83, 0.35);
  box-sizing: border-box;
}
.nav__brand .wordmark { font-size: 1.55rem; }
.nav__links {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 1.9rem;
  padding: 0;
  margin: 0;
}
.nav__links a {
  color: var(--muted);
  font-weight: 400;
  font-size: var(--step-0);
  letter-spacing: 0.04em;
}
.nav__links a:hover, .nav__links a[aria-current="page"] {
  color: var(--text);
  text-decoration: none;
}
.nav__links a[aria-current="page"] { color: var(--cyan); }
.nav__cta { margin-left: 0.5rem; flex-shrink: 0; }
.nav__cta .btn { white-space: nowrap; }
.nav__toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  color: var(--text);
  padding: 0.5rem 0.8rem;
  letter-spacing: 0.08em;
  cursor: pointer;
}

@media (max-width: 980px) {
  .nav__toggle { display: inline-flex; }
  .nav__menu {
    position: absolute;
    top: 112px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0.25rem;
    background: #000;
    border-bottom: 1px solid var(--border);
    padding: 1rem var(--gutter) 1.5rem;
    display: none;
  }
  .nav__menu.is-open { display: flex; }
  .nav__links { flex-direction: column; align-items: stretch; gap: 0.25rem; }
  .nav__links a { padding: 0.7rem 0; border-bottom: 1px solid var(--border-soft); }
  .nav__cta { margin: 0.75rem 0 0; }
  .nav__cta .btn { width: 100%; justify-content: center; }
}
@media (min-width: 981px) {
  .nav__menu { display: flex !important; align-items: center; gap: 1.9rem; }
}

/* ---- Hero -------------------------------------------------------------- */
.hero { position: relative; overflow: hidden; }
.hero__inner { padding-block: clamp(4rem, 10vw, 8rem); position: relative; z-index: 1; }
.hero h1 { max-width: 18ch; }
.hero .lede { margin-top: 1.5rem; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 2.5rem; }
.hero__note { margin-top: 1.5rem; font-size: var(--step--1); color: var(--muted-dim); letter-spacing: 0.02em; }
/* Faint waterline — calm watermark, not the retired wave logo */
.hero::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: clamp(1rem, 4vw, 2.5rem);
  transform: translateX(-50%);
  width: min(900px, 78%);
  height: 60px;
  background:
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1440 40'%3E%3Cpath d='M0,20 C120,4 240,4 360,20 C480,36 600,36 720,20 C840,4 960,4 1080,20 C1200,36 1320,36 1440,20' fill='none' stroke='%23f6c453' stroke-width='1.5' stroke-opacity='0.28'/%3E%3C/svg%3E")
    no-repeat center / contain;
  pointer-events: none;
}

/* ---- Cards / grids ----------------------------------------------------- */
.grid { display: grid; gap: clamp(1.5rem, 3vw, 2.75rem); }
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr)); }

/* Minimalist card: hairline top rule + air, no fill, no lift */
.card {
  background: transparent;
  border: 0;
  border-top: 1px solid var(--border-soft);
  border-radius: 0;
  padding: 1.9rem 0 0;
  position: relative;
  transition: border-color 0.3s ease;
}
.card:hover { border-top-color: var(--border-strong); }
.card h3 { margin-bottom: 0.6rem; color: var(--text); }
.card p { font-size: var(--step-0); }
.card--feature { border-top-color: var(--border-strong); }

.card__icon {
  color: var(--muted);
  margin-bottom: 1.25rem;
  line-height: 0;
}
.card__icon svg {
  width: 30px; height: 30px;
  stroke: currentColor; fill: none;
  stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round;
}
.card--feature .card__icon { color: var(--cyan); }

.card__tag {
  display: inline-block;
  font-size: var(--step--1);
  font-weight: 500;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 1.1rem;
}
.card ul { color: var(--muted); font-size: var(--step-0); }
.card li + li { margin-top: 0.4rem; }

/* Steps (how it works) — thin gold numerals */
.step__num {
  font-family: var(--font-mono);
  font-size: var(--step-2);
  font-weight: var(--wt-hair);
  color: var(--cyan);
  letter-spacing: 0.04em;
  margin-bottom: 0.6rem;
}

/* Banded section — hairlines + air, no fill */
.band { border-block: 1px solid var(--border-soft); }

/* Split hero/CTA */
.split {
  display: grid;
  gap: 2.5rem;
  grid-template-columns: 1fr;
  align-items: center;
}
@media (min-width: 861px) { .split { grid-template-columns: 1.1fr 0.9fr; gap: 4rem; } }

/* Definition rows (pricing / commercial model) — hairline list */
.rows { display: grid; gap: 0; }
.row {
  display: flex; flex-wrap: wrap; gap: 0.4rem 1.5rem;
  justify-content: space-between; align-items: baseline;
  padding: 1.4rem 0;
  border-bottom: 1px solid var(--border-soft);
  background: transparent;
}
.row:first-child { border-top: 1px solid var(--border-soft); }
.row strong { color: var(--text); font-weight: 500; letter-spacing: 0.01em; }
.row span { color: var(--muted); max-width: 62ch; }

/* Checklist — small gold rings echo the logo's O */
.check { list-style: none; padding: 0; }
.check li {
  position: relative; padding-left: 2rem; margin-top: 0.75rem; color: var(--muted);
  overflow-wrap: anywhere;
}
.check li::before {
  content: "";
  position: absolute; left: 0; top: 0.55em;
  width: 9px; height: 9px; border-radius: 50%;
  border: 1.5px solid var(--cyan);
  background: transparent;
}

/* CTA panel — restrained, hairline framed */
.cta-panel {
  text-align: center;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: clamp(2.5rem, 6vw, 4.5rem);
  background:
    radial-gradient(70% 130% at 50% 0%, rgba(246, 196, 83, 0.05), transparent 62%),
    transparent;
}
.cta-panel .hero__actions { justify-content: center; }

/* Case study (use cases on services) */
.case-study {
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: clamp(2rem, 5vw, 3rem);
  background:
    radial-gradient(70% 130% at 50% 0%, rgba(246, 196, 83, 0.04), transparent 62%),
    transparent;
}
.case-study__brand img {
  width: auto;
  max-width: min(100%, 280px);
  height: auto;
  max-height: 48px;
}
.case-study__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
}
.case-study__tags .card__tag { margin-bottom: 0; }
.case-study__grid {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: 1fr;
}
@media (min-width: 540px) {
  .case-study__grid { grid-template-columns: repeat(2, 1fr); }
}
.case-study__item {
  border-top: 1px solid var(--border-soft);
  padding-top: 1.25rem;
}
.case-study__item h4 {
  font-size: var(--step-0);
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--text);
  margin-bottom: 0.45rem;
}
.case-study__item p {
  font-size: var(--step--1);
  line-height: 1.65;
}
.case-study__transfer {
  margin-top: 2rem;
  padding-top: 1.75rem;
  border-top: 1px solid var(--border-soft);
  font-size: var(--step-0);
  max-width: 72ch;
}

/* ---- Footer ------------------------------------------------------------ */
.site-footer {
  border-top: 1px solid var(--border-soft);
  background: #000;
  padding-block: 3.5rem 2rem;
  margin-top: 2rem;
}
.footer__grid {
  display: grid;
  gap: 2.5rem;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 200px), 1fr));
}
.footer__brand .wordmark { display: inline-flex; font-size: 1.5rem; margin-bottom: 1rem; }
.footer__brand p { font-size: var(--step--1); max-width: 34ch; line-height: 1.7; }
.footer h4 {
  font-size: var(--step--1); font-weight: 500; letter-spacing: 0.24em; text-transform: uppercase;
  color: var(--muted-dim); margin-bottom: 1.1rem;
}
.footer ul { list-style: none; padding: 0; }
.footer li + li { margin-top: 0.6rem; }
.footer a { color: var(--muted); font-size: var(--step-0); }
.footer a:hover { color: var(--text); }
.footer__bottom {
  margin-top: 3rem; padding-top: 1.75rem; border-top: 1px solid var(--border-soft);
  display: flex; flex-wrap: wrap; gap: 0.5rem 1.5rem; justify-content: space-between;
  font-size: var(--step--1); color: var(--muted-dim); letter-spacing: 0.02em;
}

/* ---- Intro splash (homepage) ------------------------------------------- */
.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;
}
body.splash-open { overflow: hidden; }

#splash {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0;
  width: 100%;
  min-height: 100vh;
  min-height: 100dvh;
  margin: 0;
  padding: 2rem;
  background: #000;
  border: 0;
  color: var(--text);
  font-family: inherit;
  cursor: pointer;
  transition: opacity 0.6s ease, visibility 0.6s ease;
}
#splash.is-hiding { opacity: 0; visibility: hidden; pointer-events: none; }
.splash-seen #splash, #splash[hidden] { display: none !important; }

.splash__logo { display: flex; flex-direction: column; align-items: center; }
.splash__ring {
  width: clamp(7.5rem, 22vw, 13rem);
  height: clamp(7.5rem, 22vw, 13rem);
  margin-bottom: clamp(1.5rem, 4vw, 2.5rem);
  border-radius: 50%;
  border: 0.55rem solid var(--cyan);
  box-shadow: 0 0 1.4em rgba(246, 196, 83, 0.75), inset 0 0 0.7em rgba(246, 196, 83, 0.35);
  animation: planetPulse 3.4s ease-in-out infinite;
  box-sizing: border-box;
}
.splash__word {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: clamp(2.4rem, 11vw, 6.5rem);
  font-weight: var(--wt-thin);
  letter-spacing: 0;
  line-height: 1;
  color: var(--text);
}

.splash__word .splash__o { animation: planetPulse 3.4s ease-in-out infinite; }

.splash__hint {
  margin-top: clamp(2rem, 5vw, 3.25rem);
  font-size: var(--step--1);
  font-weight: 500;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--muted-dim);
  animation: hintPulse 2.6s ease-in-out infinite;
}

@keyframes planetPulse {
  0%, 100% { box-shadow: 0 0 0.5em rgba(246, 196, 83, 0.6), inset 0 0 0.3em rgba(246, 196, 83, 0.3); }
  50%      { box-shadow: 0 0 0.9em rgba(246, 196, 83, 0.95), inset 0 0 0.4em rgba(246, 196, 83, 0.5); }
}
@keyframes hintPulse { 0%, 100% { opacity: 0.35; } 50% { opacity: 0.85; } }

/* ---- Discovery booking form ------------------------------------------- */
.book-form {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 1.25rem;
  color-scheme: dark;
}
.book-form__row {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 0.35rem;
  width: 100%;
}
.book-form__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  width: 100%;
}
@media (max-width: 540px) {
  .book-form__grid { grid-template-columns: 1fr; }
}
.book-form label {
  display: block;
  font-size: var(--step--1);
  letter-spacing: 0.06em;
  color: var(--muted);
}
.book-form__optional { color: var(--muted-dim); font-weight: 400; }
.book-form input,
.book-form select,
.book-form textarea {
  display: block;
  box-sizing: border-box;
  width: 100%;
  max-width: 100%;
  padding: 0.7rem 0.85rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background-color: #000000;
  color: #ffffff;
  font: inherit;
  line-height: 1.4;
  -webkit-appearance: none;
  appearance: none;
}
.book-form input::placeholder,
.book-form textarea::placeholder {
  color: var(--muted-dim);
}
.book-form option {
  background-color: #000000;
  color: #ffffff;
}
.book-form input:focus,
.book-form select:focus,
.book-form textarea:focus {
  outline: none;
  border-color: var(--cyan);
  box-shadow: 0 0 0 2px rgba(246, 196, 83, 0.2);
}
.book-form select {
  background-image: linear-gradient(45deg, transparent 50%, var(--muted) 50%),
    linear-gradient(135deg, var(--muted) 50%, transparent 50%);
  background-position: calc(100% - 18px) calc(50% - 2px), calc(100% - 12px) calc(50% - 2px);
  background-size: 6px 6px, 6px 6px;
  background-repeat: no-repeat;
  padding-right: 2rem;
}
.book-form input[type="date"] {
  color-scheme: dark;
}
.book-form textarea { resize: vertical; min-height: 5rem; }
.book-form .btn { align-self: flex-start; margin-top: 0.25rem; cursor: pointer; border: none; }
.form-success {
  margin-top: 1rem;
  padding: 0.85rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: rgba(246, 196, 83, 0.08);
  color: var(--text);
  font-size: var(--step-0);
}

.legal { max-width: 68ch; }
.legal h2 { font-size: var(--step-1); margin-top: 2.2rem; margin-bottom: 0.7rem; }
.legal ul { padding-left: 1.2rem; color: var(--muted); }
.legal li + li { margin-top: 0.45rem; }

/* ---- 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;
  }
}