/* =============================================
   CRIXUS AI — style.css
   Bold / Modern / Dark-first
   ============================================= */

/* ---------- DESIGN TOKENS ---------- */
:root,
[data-theme='light'] {
  /* Cream surfaces — matches logo background */
  --color-bg: #f5f2ec;
  --color-surface: #f8f5ef;
  --color-surface-2: #fdfcf9;
  --color-surface-offset: #ede9e1;
  --color-surface-offset-2: #e4e0d7;
  --color-divider: #d6d1c8;
  --color-border: #c8c3b8;
  --color-text: #3a3428;
  --color-text-muted: #7a7268;
  --color-text-faint: #b5b0a8;
  --color-text-inverse: #f5f2ec;

  /* Accent — dark brown from logo */
  --color-primary: #4a4132;
  --color-primary-hover: #3a3228;
  --color-primary-active: #2a2419;
  --color-primary-highlight: #e0dbd2;

  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

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

  --shadow-sm: 0 1px 2px oklch(0.1 0 0 / 0.06);
  --shadow-md: 0 4px 16px oklch(0.1 0 0 / 0.1);
  --shadow-lg: 0 16px 48px oklch(0.1 0 0 / 0.14);

  --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;

  --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, 3.5rem);
  --text-3xl: clamp(2.5rem, 1rem + 4vw, 5rem);
  --text-hero: clamp(3rem, 0.5rem + 7vw, 8rem);

  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;

  --font-display: 'Playfair Display', 'Georgia', serif;
  --font-body: 'Work Sans', 'Helvetica Neue', sans-serif;
}

[data-theme='dark'] {
  --color-bg: #1a1710;
  --color-surface: #201d15;
  --color-surface-2: #26221a;
  --color-surface-offset: #1e1b13;
  --color-surface-offset-2: #242018;
  --color-divider: #2e2a20;
  --color-border: #3b3628;
  --color-text: #e8e3d8;
  --color-text-muted: #9a9285;
  --color-text-faint: #5e5a51;
  --color-text-inverse: #1a1710;

  /* In dark mode, use warm tan/gold as the accent */
  --color-primary: #c9b896;
  --color-primary-hover: #d9ccb0;
  --color-primary-active: #e8dfc8;
  --color-primary-highlight: #2e2820;

  --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.3);
  --shadow-md: 0 4px 16px oklch(0 0 0 / 0.45);
  --shadow-lg: 0 16px 48px oklch(0 0 0 / 0.6);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg: #1a1710;
    --color-surface: #201d15;
    --color-surface-2: #26221a;
    --color-surface-offset: #1e1b13;
    --color-surface-offset-2: #242018;
    --color-divider: #2e2a20;
    --color-border: #3b3628;
    --color-text: #e8e3d8;
    --color-text-muted: #9a9285;
    --color-text-faint: #5e5a51;
    --color-text-inverse: #1a1710;
    --color-primary: #c9b896;
    --color-primary-hover: #d9ccb0;
    --color-primary-active: #e8dfc8;
    --color-primary-highlight: #2e2820;
    --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.3);
    --shadow-md: 0 4px 16px oklch(0 0 0 / 0.45);
    --shadow-lg: 0 16px 48px oklch(0 0 0 / 0.6);
  }
}

/* ---------- BASE RESET ---------- */
*,
*::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-20);
}

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);
  transition: background-color 0.25s ease, color 0.25s ease;
}

img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
  height: auto;
}

ul[role='list'], ol[role='list'] { list-style: none; }
input, button, textarea, select { font: inherit; color: inherit; }

h1, h2, h3, h4, h5, h6 {
  text-wrap: balance;
  line-height: 1.1;
  font-family: var(--font-display);
}

p, li, figcaption { text-wrap: pretty; max-width: 68ch; }

::selection {
  background: color-mix(in oklab, var(--color-primary) 30%, transparent);
  color: var(--color-text);
}

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

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

button { cursor: pointer; background: none; border: none; }

a, button, [role='button'], input, textarea, select {
  transition: color var(--transition-interactive),
    background var(--transition-interactive),
    border-color var(--transition-interactive),
    box-shadow var(--transition-interactive),
    opacity var(--transition-interactive);
}

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

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

/* ---------- LAYOUT ---------- */
.container {
  width: min(var(--content-wide), 100% - var(--space-8) * 2);
  margin-inline: auto;
}

/* ---------- BUTTONS ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-sm);
  font-family: var(--font-body);
  font-weight: 600;
  letter-spacing: 0.01em;
  border-radius: var(--radius-md);
  cursor: pointer;
  white-space: nowrap;
  text-decoration: none;
}

.btn--primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border: none;
  letter-spacing: 0.04em;
}
.btn--primary:hover { background: var(--color-primary-hover); }
.btn--primary:active { background: var(--color-primary-active); }

.btn--lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
}

.btn--full { width: 100%; }

/* ---------- NAV ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in oklab, var(--color-bg) 85%, transparent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-divider);
  transition: box-shadow var(--transition-interactive);
}

.nav--scrolled { box-shadow: var(--shadow-md); }

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
}

.nav__wordmark {
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 1rem + 0.5vw, 1.3rem);
  font-weight: 600;
  letter-spacing: -0.02em;
}

.nav__ai {
  color: var(--color-text-muted);
  font-style: italic;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav__links a:not(.btn) {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
}
.nav__links a:not(.btn):hover { color: var(--color-text); }

.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
  color: var(--color-text);
}
.nav__hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}
.nav__hamburger.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__hamburger.is-open span:nth-child(2) { opacity: 0; }
.nav__hamburger.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile menu */
.mobile-menu {
  display: none;
  flex-direction: column;
  gap: 0;
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-divider);
  z-index: 99;
  padding: var(--space-4) 0;
  transform: translateY(-100%);
  opacity: 0;
  transition: transform 0.25s cubic-bezier(0.16,1,0.3,1), opacity 0.2s ease;
}
.mobile-menu.is-open {
  transform: translateY(0);
  opacity: 1;
}

.mobile-link {
  display: block;
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-text-muted);
  border-bottom: 1px solid var(--color-divider);
}
.mobile-link:last-child { border-bottom: none; }
.mobile-link:hover { color: var(--color-text); background: var(--color-surface-offset); }
.mobile-link--cta {
  color: var(--color-primary);
  font-weight: 600;
}

@media (max-width: 720px) {
  .nav__links { display: none; }
  .nav__hamburger { display: flex; }
  .mobile-menu { display: flex; }
}

/* ---------- HERO ---------- */
.hero {
  position: relative;
  min-height: min(100svh, 900px);
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--color-divider) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-divider) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: 0.35;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, #000 20%, transparent 80%);
}

.hero__glow {
  position: absolute;
  border-radius: var(--radius-full);
  filter: blur(100px);
  pointer-events: none;
}
.hero__glow--1 {
  width: 600px; height: 600px;
  background: color-mix(in oklab, #8a7558 18%, transparent);
  top: -100px; left: -100px;
}
.hero__glow--2 {
  width: 400px; height: 400px;
  background: color-mix(in oklab, #6b5c42 10%, transparent);
  bottom: 0; right: -50px;
}

.hero__content {
  position: relative;
  z-index: 1;
  padding-block: clamp(var(--space-20), 12vw, var(--space-32));
  max-width: 820px;
}

.hero__eyebrow {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-5);
  border-bottom: 1px solid var(--color-border);
  padding-bottom: var(--space-3);
}

.hero__headline {
  font-size: var(--text-3xl);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.0;
  margin-bottom: var(--space-6);
}

.hero__line { display: block; }

.hero__line--accent {
  color: var(--color-text);
  font-style: italic;
  opacity: 0.75;
}

.hero__sub {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: var(--space-10);
  max-width: 56ch;
}

.hero__cta { font-size: var(--text-base); }

.hero__scroll-hint {
  position: absolute;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  z-index: 1;
}

.hero__scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, transparent, var(--color-border));
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.4; transform: scaleY(1); }
  50% { opacity: 1; transform: scaleY(1.2); }
}

/* ---------- TRUST BAR ---------- */
.trust-bar {
  border-top: 1px solid var(--color-divider);
  border-bottom: 1px solid var(--color-divider);
  padding-block: var(--space-6);
  background: var(--color-surface);
}

.trust-bar .container {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  flex-wrap: wrap;
}

.trust-bar__label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  white-space: nowrap;
  flex-shrink: 0;
}

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

.tech-badge {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  padding: var(--space-1) var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  background: var(--color-surface-offset);
}

/* ---------- SECTION HEADER ---------- */
.section-header {
  max-width: 640px;
  margin-bottom: clamp(var(--space-10), 5vw, var(--space-16));
}

.section-tag {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
}

.section-title {
  font-size: var(--text-2xl);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-4);
}

.section-desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ---------- SERVICES ---------- */
.services {
  padding-block: clamp(var(--space-16), 8vw, var(--space-32));
}

.services__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
}

.service-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive), transform var(--transition-interactive);
}

.service-card:hover {
  border-color: var(--color-text-faint);
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}

.service-card--featured {
  background: var(--color-surface-2);
  border-color: var(--color-border);
  box-shadow: var(--shadow-md);
}

.service-card__icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-lg);
  background: var(--color-surface-offset);
  color: var(--color-text);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.service-card__title {
  font-size: var(--text-xl);
  font-weight: 600;
  letter-spacing: -0.02em;
}

.service-card__body {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.65;
}

.service-card__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-top: var(--space-2);
  padding: 0;
}

.service-card__list li {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  padding-left: var(--space-5);
  position: relative;
  max-width: none;
}

.service-card__list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--color-text-faint);
}

/* ---------- STATEMENT ---------- */
.statement {
  border-top: 1px solid var(--color-divider);
  border-bottom: 1px solid var(--color-divider);
  background: var(--color-surface-offset);
  padding-block: clamp(var(--space-12), 6vw, var(--space-24));
}

.statement__quote {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 400;
  letter-spacing: -0.01em;
  line-height: 1.3;
  color: var(--color-text);
  font-style: italic;
  max-width: 760px;
  border-left: 3px solid var(--color-border);
  padding-left: var(--space-8);
}

/* ---------- HOW IT WORKS ---------- */
.how {
  padding-block: clamp(var(--space-16), 8vw, var(--space-32));
}

.how__steps {
  display: flex;
  align-items: flex-start;
  gap: 0;
}

.how__step {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  padding: var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
}

.how__connector {
  width: var(--space-5);
  flex-shrink: 0;
  height: 1px;
  background: var(--color-border);
  margin-top: calc(var(--space-6) + 28px);
}

.how__step-num {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--color-text-faint);
  line-height: 1;
  letter-spacing: -0.04em;
}

.how__step h3 {
  font-size: var(--text-lg);
  font-weight: 600;
  letter-spacing: -0.015em;
}

.how__step p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
  max-width: 100%;
}

/* ---------- CONTACT ---------- */
.contact {
  padding-block: clamp(var(--space-16), 8vw, var(--space-32));
  background: var(--color-surface);
  border-top: 1px solid var(--color-divider);
}

.contact__inner {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: clamp(var(--space-12), 6vw, var(--space-20));
  align-items: start;
}

.contact__title {
  font-size: var(--text-2xl);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-4);
}

.contact__desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-8);
}

.contact__detail {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}
.contact__detail a {
  color: var(--color-text);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.contact__detail a:hover { color: var(--color-text-muted); }
.contact__detail svg { flex-shrink: 0; color: var(--color-text-muted); }

/* Form */
.contact__form {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-group label {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
}

.form-group input,
.form-group textarea {
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--text-base);
  color: var(--color-text);
  resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-color: var(--color-primary);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--color-text-faint);
}

.form-note {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-align: center;
  margin-top: calc(var(--space-2) * -1);
}

/* Success state */
.form-success {
  display: none;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-12);
  text-align: center;
}
.form-success.is-visible { display: flex; }
.form-success__icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-full);
  background: var(--color-primary-highlight);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
}
.form-success__title {
  font-size: var(--text-xl);
  font-weight: 700;
}
.form-success__desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
}

/* ---------- FOOTER ---------- */
.footer {
  border-top: 1px solid var(--color-divider);
  padding-block: var(--space-8);
  background: var(--color-bg);
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  flex-wrap: wrap;
}

.footer__brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-muted);
}

.footer__copy {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

.theme-toggle {
  color: var(--color-text-muted);
  padding: var(--space-2);
  border-radius: var(--radius-md);
}
.theme-toggle:hover {
  color: var(--color-text);
  background: var(--color-surface-offset);
}

/* ---------- RESPONSIVE ---------- */
@media (max-width: 900px) {
  .services__grid { grid-template-columns: 1fr; }
  .how__steps { flex-direction: column; gap: var(--space-3); }
  .how__connector { width: 1px; height: var(--space-3); margin: 0 auto; }
  .contact__inner { grid-template-columns: 1fr; }
  .for-who__inner { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .stats-bar__inner { gap: var(--space-6); }
  .stat-divider { display: none; }
}

@media (max-width: 600px) {
  .hero__headline { font-size: clamp(2.25rem, 8vw, 4rem); }
  .hero__actions { flex-direction: column; align-items: flex-start; }
  .statement__quote { font-size: clamp(1.25rem, 4.5vw, 2rem); }
  .trust-bar .container { flex-direction: column; align-items: flex-start; }
  .stats-bar__inner { flex-direction: column; }
}