@import '/tokens/design-tokens.css';

/* ─── Reset ─────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }

body {
  font-family: var(--font-body);
  font-size: var(--fs-base);
  line-height: var(--line-height-base);
  color: var(--color-text);
  background-color: var(--color-bg);
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; font-family: inherit; border: none; background: none; }

/* ─── Sticky header wrapper ─────────────────────────────── */
#site-header {
  position: sticky;
  top: 0;
  z-index: 100;
}

/* ─── Back to top ────────────────────────────────────────── */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 3rem;
  height: 3rem;
  background-color: var(--color-black);
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border: none;
  opacity: 0;
  transform: translateY(0.75rem);
  transition: opacity 0.35s ease, transform 0.35s ease, background-color var(--transition-fast);
  pointer-events: none;
  z-index: 90;
}

.back-to-top.is-visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.back-to-top:hover {
  background-color: var(--color-teal);
}

.back-to-top svg {
  width: 1.125rem;
  height: 1.125rem;
}

@media (max-width: 768px) {
  .back-to-top {
    bottom: 1.25rem;
    right: 1.25rem;
    width: 2.5rem;
    height: 2.5rem;
  }
}

/* ─── Container ─────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

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

/* ─── Typography globals ─────────────────────────────────── */
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  line-height: var(--line-height-heading);
  font-weight: 700;
  color: var(--color-text);
}

h1 { font-size: var(--fs-hero); }
h2 { font-size: var(--fs-3xl); }
h3 { font-size: var(--fs-xl); }
h4 { font-size: var(--fs-lg); }

p { max-width: 68ch; }

strong { font-weight: 600; }
em { font-style: italic; }

/* ─── Section label ──────────────────────────────────────── */
.section-label {
  display: block;
  font-family: var(--font-body);
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-teal);
  margin-bottom: var(--sp-md);
}

/* ─── Section base ───────────────────────────────────────── */
.section {
  padding-block: var(--sp-xl);
}

.section--sm {
  padding-block: var(--sp-lg);
}

.section--bg-beige {
  background-color: var(--color-beige-light);
  background-image: radial-gradient(circle, rgba(120, 100, 88, 0.12) 1px, transparent 1px);
  background-size: 18px 18px;
}

.section--bg-dark {
  background-color: var(--color-text);
  color: var(--color-white);
}

.section--bg-dark h1,
.section--bg-dark h2,
.section--bg-dark h3,
.section--bg-dark h4 {
  color: var(--color-white);
}

.section__header {
  margin-bottom: var(--sp-lg);
}

.section__header h2 {
  margin-top: var(--sp-sm);
}

.section__intro {
  font-size: var(--fs-md);
  color: var(--color-text-muted);
  margin-top: var(--sp-sm);
  max-width: 58ch;
}

/* ─── Horizontal rule ────────────────────────────────────── */
.rule {
  border: none;
  border-top: var(--border-thin);
  margin-block: var(--sp-md);
}

.rule--dark {
  border-top-color: var(--color-black);
}

.rule--teal {
  border-top-color: var(--color-teal);
  width: 3rem;
  margin-inline: 0;
}

/* ─── Buttons ────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-body);
  font-size: var(--fs-sm);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.95rem 2.1rem;
  transition: background-color var(--transition-fast),
              color var(--transition-fast),
              border-color var(--transition-fast);
  white-space: nowrap;
}

.btn--primary {
  background-color: var(--color-black);
  color: var(--color-white);
  border: 1px solid var(--color-black);
}

.btn--primary:hover {
  background-color: transparent;
  color: var(--color-black);
}

.btn--outline {
  background-color: transparent;
  color: var(--color-black);
  border: 1px solid var(--color-black);
}

.btn--outline:hover {
  background-color: var(--color-black);
  color: var(--color-white);
}

.btn--teal {
  background-color: var(--color-teal);
  color: var(--color-white);
  border: 1px solid var(--color-teal);
}

.btn--teal:hover {
  background-color: var(--color-teal-dark);
  border-color: var(--color-teal-dark);
}

.btn--white {
  background-color: var(--color-white);
  color: var(--color-black);
  border: 1px solid var(--color-white);
}

.btn--white:hover {
  background-color: transparent;
  color: var(--color-white);
}

/* ─── Dash list (editorial) ──────────────────────────────── */
.dash-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.dash-list li {
  display: flex;
  gap: 0.75rem;
  font-size: var(--fs-md);
  line-height: 1.5;
}

.dash-list li::before {
  content: '–';
  color: var(--color-teal);
  flex-shrink: 0;
  font-family: var(--font-heading);
  font-weight: 400;
}

.dash-list--sm li {
  font-size: var(--fs-base);
}

.dash-list--muted li {
  color: var(--color-text-muted);
}

/* ─── Two-column grid ────────────────────────────────────── */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-lg);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-md);
}

@media (max-width: 1024px) {
  .grid-3 { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
}

/* ─── Text utilities ─────────────────────────────────────── */
.text-center { text-align: center; }
.text-muted   { color: var(--color-text-muted); }
.text-teal    { color: var(--color-teal); }
.text-italic  { font-style: italic; font-family: var(--font-heading); }

/* ─── Scroll animations ──────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal--delay-1 { transition-delay: 0.1s; }
.reveal--delay-2 { transition-delay: 0.2s; }
.reveal--delay-3 { transition-delay: 0.3s; }
.reveal--delay-4 { transition-delay: 0.4s; }

/* ─── Responsive helpers ─────────────────────────────────── */
@media (max-width: 768px) {
  .section { padding-block: var(--sp-lg); }
  .section--sm { padding-block: var(--sp-md); }
  h1 { font-size: clamp(2rem, 7vw, 2.75rem); }
  h2 { font-size: clamp(1.75rem, 5vw, 2.5rem); }
}