/* AD Interiors — Brand-matched palette from invoice */
:root,
[data-theme='light'] {
  /* Surfaces — warm ivory/cream */
  --color-bg: #f9f7f3;
  --color-surface: #fdfcfa;
  --color-surface-2: #f5f2ed;
  --color-surface-offset: #efebe5;
  --color-divider: #e2ddd5;
  --color-border: #d6cfc5;

  /* Text */
  --color-text: #2a2520;
  --color-text-muted: #7a7068;
  --color-text-faint: #b0a89e;
  --color-text-inverse: #f9f7f3;

  /* Brand — Slate Blue (from invoice) */
  --color-primary: #1a3a5c;
  --color-primary-hover: #0d2540;
  --color-primary-active: #081a30;
  --color-primary-highlight: #c6d9f1;
  --color-accent: #8db3e2;
  --color-accent-soft: #d6e4f0;

  /* Semantic */
  --color-error: #a13544;
  --color-success: #437a22;
  --color-warning: #964219;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1.5rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-interactive: 200ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(42, 37, 32, 0.06);
  --shadow-md: 0 4px 16px rgba(42, 37, 32, 0.08);
  --shadow-lg: 0 16px 48px rgba(42, 37, 32, 0.12);

  /* Content widths */
  --content-narrow: 680px;
  --content-default: 960px;
  --content-wide: 1140px;
  --content-full: 100%;

  /* Fonts */
  --font-display: 'Cormorant Garamond', Georgia, 'Times New Roman', serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

[data-theme='dark'] {
  --color-bg: #15120f;
  --color-surface: #1c1814;
  --color-surface-2: #221d18;
  --color-surface-offset: #1d1915;
  --color-divider: #2a241f;
  --color-border: #36302a;
  --color-text: #e8e2da;
  --color-text-muted: #9a9088;
  --color-text-faint: #6a6258;
  --color-text-inverse: #15120f;
  --color-primary: #7ba8d4;
  --color-primary-hover: #5e8eb8;
  --color-primary-active: #4a77a0;
  --color-primary-highlight: #2a3540;
  --color-accent: #5e8eb8;
  --color-accent-soft: #2a3540;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.4);
}

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

html {
  -webkit-text-size-adjust: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

body {
  min-height: 100dvh;
  line-height: 1.65;
  font-family: var(--font-body);
  font-size: clamp(1rem, 0.95rem + 0.2vw, 1.0625rem);
  color: var(--color-text);
  background-color: var(--color-bg);
}

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: 1.2;
}

p, li, figcaption {
  text-wrap: pretty;
  max-width: 72ch;
}

::selection {
  background: var(--color-accent-soft);
  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'], [role='link'], 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);
}

.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: 100%;
  max-width: var(--content-default);
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 4vw, 3rem);
}

.container--narrow {
  max-width: var(--content-narrow);
}

/* ===== Header ===== */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in oklab, var(--color-bg) 88%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-divider);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.header--hidden {
  transform: translateY(-100%);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 1.5rem;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 4vw, 3rem);
  padding-block: 0.875rem;
}

.logo {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.logo__img {
  height: 2.5rem;
  width: auto;
  object-fit: contain;
  flex-shrink: 0;
}

[data-theme='dark'] .logo__img {
  filter: invert(1);
}

.nav {
  display: flex;
  gap: clamp(1rem, 2vw, 2.25rem);
}

.nav__link {
  font-size: 0.8125rem;
  font-weight: 500;
  text-decoration: none;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.nav__link:hover {
  color: var(--color-primary);
}

.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);
  flex-shrink: 0;
}

.theme-toggle:hover {
  color: var(--color-primary);
  background: var(--color-surface-offset);
}

@media (max-width: 640px) {
  .nav {
    display: none;
  }
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  padding-block: clamp(2.5rem, 6vw, 5rem);
  overflow: hidden;
  background: var(--color-bg);
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  background: url('hero-materials.webp') center right / cover no-repeat;
}

.hero__bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to right,
    var(--color-bg) 0%,
    var(--color-bg) 30%,
    color-mix(in oklab, var(--color-bg) 85%, transparent) 45%,
    color-mix(in oklab, var(--color-bg) 60%, transparent) 65%,
    color-mix(in oklab, var(--color-bg) 30%, transparent) 100%
  );
}

[data-theme='dark'] .hero__bg::after {
  background: linear-gradient(
    to right,
    var(--color-bg) 0%,
    var(--color-bg) 30%,
    color-mix(in oklab, var(--color-bg) 88%, transparent) 45%,
    color-mix(in oklab, var(--color-bg) 65%, transparent) 65%,
    color-mix(in oklab, var(--color-bg) 35%, transparent) 100%
  );
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: 42rem;
  padding-inline: clamp(1.5rem, 5vw, 4rem);
  text-align: left;
}

.hero__brand {
  display: block;
  width: fit-content;
  margin-bottom: 1.25rem;
}

.hero__logo {
  display: block;
  width: 0;
  min-width: 100%;
  height: auto;
  margin-bottom: 0.75rem;
}

[data-theme='dark'] .hero__logo {
  filter: invert(1);
}

.hero__eyebrow {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin: 0;
  white-space: nowrap;
}

.hero__title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 1rem + 5vw, 4.25rem);
  font-weight: 500;
  line-height: 1.08;
  letter-spacing: -0.01em;
  margin-bottom: 1.5rem;
  color: var(--color-text);
}

.hero__subtitle {
  font-size: clamp(1rem, 0.95rem + 0.2vw, 1.125rem);
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 2rem;
  max-width: 32rem;
}

.hero__scroll-hint {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  color: var(--color-text-faint);
  animation: bob 2s ease-in-out infinite;
}

@keyframes bob {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(0.5rem); }
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 2rem;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-decoration: none;
  border-radius: var(--radius-full);
  transition: all var(--transition-interactive);
}

.btn--primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}

.btn--primary:hover {
  background: var(--color-primary-hover);
  box-shadow: var(--shadow-md);
}

/* ===== Sections ===== */
.section {
  padding-block: clamp(3.5rem, 8vw, 7rem);
}

.section__eyebrow {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 0.75rem;
}

.section__title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 1.2rem + 2vw, 2.75rem);
  font-weight: 500;
  line-height: 1.15;
  margin-bottom: clamp(2rem, 4vw, 3.5rem);
  color: var(--color-text);
}

/* ===== Services ===== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 16rem), 1fr));
  gap: clamp(1.5rem, 3vw, 2.5rem);
}

.service-card {
  padding: clamp(1.75rem, 3vw, 2.5rem);
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  transition: box-shadow var(--transition-interactive), transform var(--transition-interactive);
}

.service-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.service-card__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 3.5rem;
  height: 3.5rem;
  margin-bottom: 1.5rem;
  border-radius: var(--radius-md);
  background: var(--color-accent-soft);
  color: var(--color-primary);
}

.service-card__title {
  font-family: var(--font-display);
  font-size: 1.375rem;
  font-weight: 600;
  margin-bottom: 0.625rem;
  color: var(--color-text);
}

.service-card__text {
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--color-text-muted);
}

/* ===== About ===== */
.section--about {
  background: var(--color-surface);
  border-block: 1px solid var(--color-divider);
}

.about-content p {
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--color-text);
  margin-bottom: 1.25rem;
}

.about-content p:last-child {
  margin-bottom: 0;
}

/* ===== Process ===== */
.process-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 14rem), 1fr));
  gap: clamp(1.5rem, 3vw, 3rem);
}

.process-step {
  position: relative;
  padding-top: 0.5rem;
}

.process-step__number {
  display: block;
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 500;
  color: var(--color-accent);
  margin-bottom: 0.75rem;
  line-height: 1;
}

.process-step__title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--color-text);
}

.process-step__text {
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--color-text-muted);
}

/* ===== Service Area ===== */
.section--area {
  text-align: center;
  background:
    radial-gradient(ellipse at 50% 50%, var(--color-surface-offset) 0%, transparent 70%),
    var(--color-bg);
}

.section--area .section__eyebrow,
.section--area .section__title {
  text-align: center;
}

.area-text {
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--color-text-muted);
  max-width: 36rem;
  margin-inline: auto;
}

/* ===== Contact ===== */
.section--contact {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}

.section--contact .section__eyebrow {
  color: var(--color-accent);
}

.section--contact .section__title {
  color: var(--color-text-inverse);
}

.contact-intro {
  font-size: 1.0625rem;
  line-height: 1.7;
  color: color-mix(in oklab, var(--color-text-inverse) 80%, transparent);
  margin-bottom: clamp(2rem, 4vw, 3rem);
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 14rem), 1fr));
  gap: clamp(1.5rem, 3vw, 2.5rem);
}

.contact-item {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--color-text-inverse);
}

.contact-item__label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.contact-item__value {
  font-size: 1.0625rem;
  font-weight: 400;
  line-height: 1.5;
}

a.contact-item:hover .contact-item__value {
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ===== Footer ===== */
.footer {
  background: var(--color-primary-active, #081a30);
  padding-block: 2.5rem;
  border-top: 1px solid var(--color-divider);
}

.footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  text-align: center;
}

.footer__brand {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.footer__name {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text-inverse);
}

.footer__tagline {
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.footer__contact {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.875rem;
}

.footer__contact a {
  color: color-mix(in oklab, var(--color-text-inverse) 70%, transparent);
  text-decoration: none;
}

.footer__contact a:hover {
  color: var(--color-text-inverse);
}

.footer__contact span {
  color: var(--color-accent);
}

.footer__copy {
  font-size: 0.75rem;
  color: var(--color-text-faint);
  margin-top: 0.5rem;
}

/* ===== Responsive ===== */
@media (max-width: 640px) {
  .hero {
    min-height: 75vh;
  }

  .footer__contact {
    flex-direction: column;
    gap: 0.375rem;
  }

  .footer__contact span[aria-hidden] {
    display: none;
  }
}

@media (max-width: 720px) {
  .hero__bg::after,
  [data-theme='dark'] .hero__bg::after {
    background: color-mix(in oklab, var(--color-bg) 90%, transparent);
  }
}