/* ============================================================
   CODON VALUATION ADVISORS — DESIGN TOKENS
   ============================================================ */
:root,
[data-theme='light'] {
  /* Surfaces */
  --color-bg: #f6f5f1;
  --color-surface: #ffffff;
  --color-surface-2: #fbfaf7;
  --color-surface-offset: #eeece4;
  --color-divider: #e1ddd2;
  --color-border: #d3cfc1;

  /* Text */
  --color-text: #1f2430;
  --color-text-muted: #5b6170;
  --color-text-faint: #9a9fa9;
  --color-text-inverse: #f7f6f2;

  /* Primary accent — Codon Teal */
  --color-primary: #12665f;
  --color-primary-hover: #0d4d47;
  --color-primary-active: #0a3a35;
  --color-primary-highlight: #d7e6e3;

  --radius-sm: 0.375rem;
  --radius-md: 0.625rem;
  --radius-lg: 1rem;
  --radius-full: 9999px;

  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  --shadow-sm: 0 1px 2px oklch(0.2 0.01 80 / 0.06);
  --shadow-md: 0 8px 24px oklch(0.2 0.02 200 / 0.08);
  --shadow-lg: 0 20px 48px oklch(0.2 0.02 200 / 0.14);

  --content-narrow: 640px;
  --content-default: 1080px;
  --content-wide: 1240px;

  --font-display: 'General Sans', 'Helvetica Neue', Arial, sans-serif;
  --font-body: 'General Sans', 'Helvetica Neue', Arial, sans-serif;
}

[data-theme='dark'] {
  --color-bg: #14171c;
  --color-surface: #191d23;
  --color-surface-2: #1e222a;
  --color-surface-offset: #20242c;
  --color-divider: #272c34;
  --color-border: #343a44;

  --color-text: #e6e4de;
  --color-text-muted: #9ea3ac;
  --color-text-faint: #656b76;
  --color-text-inverse: #1c1f24;

  --color-primary: #55b8ac;
  --color-primary-hover: #3f9d92;
  --color-primary-active: #327f76;
  --color-primary-highlight: #22383a;

  --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.3);
  --shadow-md: 0 8px 24px oklch(0 0 0 / 0.35);
  --shadow-lg: 0 20px 48px oklch(0 0 0 / 0.5);
}

/* ============================================================
   BASE
   ============================================================ */
:root {
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.2rem + 2.5vw, 3.25rem);
  --text-hero: clamp(2.75rem, 1rem + 5.5vw, 5.5rem);

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  -webkit-text-size-adjust: none;
  text-size-adjust: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: var(--space-24);
}

body {
  min-height: 100dvh;
  line-height: 1.6;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
}

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

h1, h2, h3, h4 { text-wrap: balance; line-height: 1.15; font-family: var(--font-display); }
p, li { text-wrap: pretty; }

a { color: inherit; text-decoration: none; }

::selection { background: color-mix(in oklab, var(--color-primary) 25%, transparent); }

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

button { cursor: pointer; background: none; border: none; font: inherit; color: inherit; }
input, textarea, select { font: inherit; color: inherit; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
}

.skip-link {
  position: absolute; left: -999px; top: auto;
  background: var(--color-primary); color: var(--color-text-inverse);
  padding: var(--space-2) var(--space-4); border-radius: var(--radius-sm); z-index: 100;
}
.skip-link:focus { left: var(--space-4); top: var(--space-4); }

.section-inner {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: clamp(var(--space-5), 5vw, var(--space-12));
}

.section-label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}

.section-title {
  font-size: var(--text-2xl);
  font-weight: 600;
  letter-spacing: -0.01em;
  max-width: 22ch;
  color: var(--color-text);
}

.lede {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 56ch;
  margin-top: var(--space-5);
  font-weight: 400;
}
.lede--center { margin-inline: auto; text-align: left; }

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 600;
  white-space: nowrap;
  transition: background var(--transition-interactive), color var(--transition-interactive), border-color var(--transition-interactive), transform var(--transition-interactive);
}
.btn--primary {
  background: var(--color-primary); color: var(--color-text-inverse);
}
.btn--primary:hover { background: var(--color-primary-hover); transform: translateY(-1px); }
.btn--ghost {
  background: transparent; color: var(--color-text); border: 1px solid var(--color-border);
}
.btn--ghost:hover { border-color: var(--color-primary); color: var(--color-primary); }
.btn--lg { padding: var(--space-4) var(--space-8); font-size: var(--text-sm); }
.btn--sm { padding: var(--space-2) var(--space-5); }

/* ============================================================
   HEADER
   ============================================================ */
.header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in oklab, var(--color-bg) 88%, transparent);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-divider);
  transition: transform 0.3s cubic-bezier(0.16,1,0.3,1), box-shadow 0.3s cubic-bezier(0.16,1,0.3,1);
}
.header--hidden { transform: translateY(-100%); }
.header--scrolled { box-shadow: var(--shadow-sm); }

.header__inner {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding: var(--space-4) clamp(var(--space-5), 5vw, var(--space-12));
  display: flex; align-items: center; justify-content: space-between; gap: var(--space-6);
}

.brand { display: flex; align-items: center; gap: var(--space-3); color: var(--color-text); }
.brand__mark { color: var(--color-primary); flex-shrink: 0; }
.brand__text { display: flex; flex-direction: column; line-height: 1.1; }
.brand__name { font-weight: 700; font-size: var(--text-sm); letter-spacing: 0.14em; }
.brand__sub { font-size: 0.6rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--color-text-muted); }

.nav { display: flex; align-items: center; gap: var(--space-8); }
.nav a { font-size: var(--text-sm); font-weight: 500; color: var(--color-text-muted); position: relative; }
.nav a:hover { color: var(--color-text); }

.header__actions { display: flex; align-items: center; gap: var(--space-4); }

.theme-toggle {
  display: flex; align-items: center; justify-content: center;
  width: 2.25rem; height: 2.25rem; border-radius: var(--radius-full);
  color: var(--color-text-muted); border: 1px solid var(--color-border);
}
.theme-toggle:hover { color: var(--color-primary); border-color: var(--color-primary); }

.nav-toggle { display: none; flex-direction: column; gap: 4px; width: 24px; }
.nav-toggle span { height: 2px; width: 100%; background: var(--color-text); border-radius: 2px; transition: transform var(--transition-interactive), opacity var(--transition-interactive); }

.nav-mobile {
  display: none; flex-direction: column;
  padding: var(--space-4) clamp(var(--space-5), 5vw, var(--space-12)) var(--space-6);
  border-top: 1px solid var(--color-divider);
}
.nav-mobile a { padding: var(--space-3) 0; font-size: var(--text-base); font-weight: 500; border-bottom: 1px solid var(--color-divider); color: var(--color-text); }
.nav-mobile.is-open { display: flex; }

@media (max-width: 860px) {
  .nav { display: none; }
  .nav-toggle { display: flex; }
  .header__actions .btn--sm { display: none; }
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative;
  padding: clamp(var(--space-20), 14vw, var(--space-32)) clamp(var(--space-5), 5vw, var(--space-12)) clamp(var(--space-16), 10vw, var(--space-24));
  overflow: hidden;
}
.hero__grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(to right, color-mix(in oklab, var(--color-border) 60%, transparent) 1px, transparent 1px),
    linear-gradient(to bottom, color-mix(in oklab, var(--color-border) 60%, transparent) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 20%, black 0%, transparent 75%);
  opacity: 0.6;
}
.hero__inner { position: relative; max-width: var(--content-wide); margin-inline: auto; text-align: center; }

.eyebrow {
  font-size: var(--text-xs); font-weight: 600; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--color-primary); margin-bottom: var(--space-6);
}
.hero__title {
  font-size: var(--text-hero); font-weight: 600; letter-spacing: -0.02em; max-width: 18ch; margin-inline: auto;
}
.hero__title span { color: var(--color-primary); }
.hero__lede {
  font-size: var(--text-lg); color: var(--color-text-muted); max-width: 46ch; margin: var(--space-6) auto 0;
}
.hero__actions { display: flex; gap: var(--space-4); justify-content: center; margin-top: var(--space-10); flex-wrap: wrap; }

.hero__stats {
  display: grid; grid-template-columns: repeat(3, 1fr);
  max-width: 640px; margin: var(--space-20) auto 0;
  border-top: 1px solid var(--color-divider);
  padding-top: var(--space-8);
}
.hero__stats dt { font-family: var(--font-display); font-size: var(--text-xl); font-weight: 700; color: var(--color-text); }
.hero__stats dd { font-size: var(--text-xs); color: var(--color-text-muted); margin-top: var(--space-1); }

@media (max-width: 640px) {
  .hero__stats { gap: var(--space-4); }
}

/* [data-animate] fade-in */
[data-animate] { opacity: 0; transform: translateY(16px); transition: opacity 0.7s cubic-bezier(0.16,1,0.3,1), transform 0.7s cubic-bezier(0.16,1,0.3,1); }
[data-animate].is-visible { opacity: 1; transform: none; }

/* ============================================================
   ABOUT
   ============================================================ */
.about { padding-block: clamp(var(--space-16), 10vw, var(--space-32)); }
.about__grid { display: grid; grid-template-columns: 160px 1fr; gap: var(--space-12); }
.about__content { max-width: 68ch; }
.about p { margin-top: var(--space-5); color: var(--color-text-muted); }
.about .lede { margin-top: var(--space-5); color: var(--color-text); font-style: normal; }

.about__points { margin-top: var(--space-10); display: flex; flex-direction: column; gap: var(--space-6); }
.point { display: flex; gap: var(--space-5); align-items: flex-start; padding-top: var(--space-5); border-top: 1px solid var(--color-divider); }
.point__num { font-family: var(--font-display); font-weight: 700; color: var(--color-primary); font-size: var(--text-sm); flex-shrink: 0; width: 2.2rem; }
.point p { margin-top: 0; color: var(--color-text-muted); }
.point strong { color: var(--color-text); }

@media (max-width: 780px) {
  .about__grid { grid-template-columns: 1fr; gap: var(--space-6); }
}

/* ============================================================
   SERVICES
   ============================================================ */
.services { padding-block: clamp(var(--space-16), 10vw, var(--space-32)); background: var(--color-surface); border-top: 1px solid var(--color-divider); border-bottom: 1px solid var(--color-divider); }
.services .section-title, .services .lede { margin-inline: auto; text-align: center; }
.services .lede { text-align: center; }

.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-6); margin-top: var(--space-16); }
.card {
  background: var(--color-surface-2); border: 1px solid var(--color-border); border-radius: var(--radius-lg);
  padding: var(--space-8); display: flex; flex-direction: column; gap: var(--space-4);
  transition: transform var(--transition-interactive), box-shadow var(--transition-interactive), border-color var(--transition-interactive);
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--color-primary); }
.card__icon {
  width: 3rem; height: 3rem; border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  background: var(--color-primary-highlight); color: var(--color-primary);
}
.card h3 { font-size: var(--text-lg); font-weight: 600; }
.card p { color: var(--color-text-muted); }
.card__list { display: flex; flex-direction: column; gap: var(--space-2); margin-top: auto; padding-top: var(--space-4); border-top: 1px solid var(--color-divider); }
.card__list li { font-size: var(--text-sm); color: var(--color-text-muted); padding-left: var(--space-5); position: relative; }
.card__list li::before { content: ''; position: absolute; left: 0; top: 0.6em; width: 6px; height: 6px; border-radius: 50%; background: var(--color-primary); }

@media (max-width: 940px) {
  .cards { grid-template-columns: 1fr; }
}

/* ============================================================
   WHY CODON
   ============================================================ */
.why { padding-block: clamp(var(--space-16), 10vw, var(--space-32)); }
.why__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-10) var(--space-8); margin-top: var(--space-12); }
.why__num { display: block; font-family: var(--font-display); font-weight: 700; color: var(--color-primary); font-size: var(--text-sm); margin-bottom: var(--space-3); }
.why__item h3 { font-size: var(--text-base); font-weight: 600; margin-bottom: var(--space-2); }
.why__item p { color: var(--color-text-muted); font-size: var(--text-sm); }

@media (max-width: 940px) {
  .why__grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .why__grid { grid-template-columns: 1fr; }
}

/* ============================================================
   APPROACH
   ============================================================ */
.approach { padding-block: clamp(var(--space-16), 10vw, var(--space-32)); }
.approach__grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: var(--space-16); align-items: start; }

.steps { display: flex; flex-direction: column; gap: 0; }
.step { display: flex; gap: var(--space-6); padding-block: var(--space-6); border-top: 1px solid var(--color-divider); }
.step:last-child { border-bottom: 1px solid var(--color-divider); }
.step__index { font-family: var(--font-display); font-size: var(--text-lg); font-weight: 700; color: var(--color-primary); flex-shrink: 0; width: 2.4rem; }
.step h3 { font-size: var(--text-base); font-weight: 600; margin-bottom: var(--space-2); }
.step p { color: var(--color-text-muted); font-size: var(--text-sm); }

@media (max-width: 860px) {
  .approach__grid { grid-template-columns: 1fr; gap: var(--space-8); }
}

/* ============================================================
   CONTACT
   ============================================================ */
.contact { padding-block: clamp(var(--space-16), 10vw, var(--space-32)); background: var(--color-surface); border-top: 1px solid var(--color-divider); }
.contact__grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-16); align-items: start; }

.contact__details { margin-top: var(--space-10); display: flex; flex-direction: column; gap: var(--space-4); }
.contact__link { display: inline-flex; align-items: center; gap: var(--space-3); font-weight: 600; color: var(--color-primary); font-size: var(--text-base); }
.contact__meta { color: var(--color-text-muted); font-size: var(--text-sm); max-width: 32ch; }

.form { display: flex; flex-direction: column; gap: var(--space-5); background: var(--color-surface-2); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: var(--space-8); }
.form__row { display: flex; flex-direction: column; gap: var(--space-2); }
.form__row label { font-size: var(--text-xs); font-weight: 600; letter-spacing: 0.04em; color: var(--color-text-muted); }
.form__row input, .form__row textarea, .form__row select {
  padding: var(--space-3) var(--space-4); border: 1px solid var(--color-border); border-radius: var(--radius-md);
  background: var(--color-surface); color: var(--color-text); font-size: var(--text-sm);
}
.form__row input:focus, .form__row textarea:focus, .form__row select:focus { border-color: var(--color-primary); }
.form__submit { margin-top: var(--space-2); }
.form__note { font-size: var(--text-xs); color: var(--color-text-faint); text-align: center; }

@media (max-width: 860px) {
  .contact__grid { grid-template-columns: 1fr; gap: var(--space-10); }
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer { padding-block: var(--space-12); }
.footer__inner {
  max-width: var(--content-wide); margin-inline: auto; padding-inline: clamp(var(--space-5), 5vw, var(--space-12));
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: var(--space-6);
}
.footer__nav { display: flex; gap: var(--space-6); }
.footer__nav a { font-size: var(--text-sm); color: var(--color-text-muted); }
.footer__nav a:hover { color: var(--color-primary); }
.footer__copy { font-size: var(--text-xs); color: var(--color-text-faint); width: 100%; text-align: center; margin-top: var(--space-4); }

@media (min-width: 860px) {
  .footer__copy { width: auto; margin-top: 0; }
}