/* ============================================
   TIBA STONE — SHARED STYLES
   Global tokens, reset, utilities, buttons,
   header, mobile menu, footer, reveals, lightbox
============================================ */

/* ============================================
   1. CUSTOM PROPERTIES
============================================ */
:root {
  /* Brand Colors */
  --color-stone: #222323;
  --color-ivory: #FFFFFF;
  --color-sunset: #925638;
  --color-river-green: #A3996A;
  --color-dusk-blue: #153647;
  --color-moss: #3E402B;
  --color-sand: #F0EBE3;
  --color-warm-bg: #E8E2DA;

  /* Typography */
  --font-display: 'Libre Baskerville', 'Baskerville', Georgia, serif;
  --font-body: 'Montserrat', 'Helvetica Neue', Arial, sans-serif;

  /* Type Scale */
  --text-hero: clamp(2.75rem, 5vw, 4.5rem);
  --text-h1: clamp(2rem, 3.5vw, 3.25rem);
  --text-h2: clamp(1.625rem, 2.5vw, 2.25rem);
  --text-h3: clamp(1.25rem, 1.8vw, 1.5rem);
  --text-subtitle: clamp(0.8125rem, 0.9vw, 0.875rem);
  --text-body: clamp(1rem, 1.15vw, 1.125rem);
  --text-small: clamp(0.8125rem, 0.9vw, 0.875rem);
  --text-xs: clamp(0.6875rem, 0.75vw, 0.75rem);

  /* Letter Spacing */
  --ls-wide: 0.16em;
  --ls-medium: 0.12em;
  --ls-slight: 0.03em;

  /* Line Heights */
  --lh-heading: 1.2;
  --lh-body: 1.8;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 6rem;
  --space-2xl: 8rem;
  --space-3xl: 10rem;

  /* Layout */
  --container-max: 1600px;
  --container-narrow: 780px;
  --container-pad: clamp(1.5rem, 5vw, 5rem);
  --grid-gap: clamp(1.5rem, 3vw, 2.5rem);

  /* Transitions */
  --ease-smooth: cubic-bezier(0.25, 0.1, 0.25, 1);
  --ease-spring: cubic-bezier(0.16, 1, 0.3, 1);
  --duration-fast: 0.3s;
  --duration-medium: 0.6s;
  --duration-slow: 1s;
}

/* ============================================
   2. RESET & BASE
============================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background: var(--color-ivory);
  color: var(--color-stone);
  font-family: var(--font-body);
  font-weight: 400;
  line-height: var(--lh-body);
  font-size: var(--text-body);
  overflow-x: hidden;
}

/* Grain texture overlay — lightweight version */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9998;
  opacity: 0.032;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 512 512' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='g'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='512' height='512' filter='url(%23g)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 200px 200px;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: var(--lh-heading);
}

a {
  color: var(--color-stone);
  text-decoration: none;
}

button {
  font-family: var(--font-body);
  border: none;
  background: none;
  cursor: pointer;
}

input, textarea {
  font-family: var(--font-body);
}

/* ============================================
   3. UTILITIES
============================================ */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
}

.container--narrow {
  max-width: var(--container-narrow);
  margin: 0 auto;
  padding: 0 var(--container-pad);
}

.text-center { text-align: center; }

.uppercase {
  text-transform: uppercase;
  letter-spacing: var(--ls-wide);
}

.accent-rule {
  width: 48px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-sunset) 15%, var(--color-sunset) 85%, transparent);
  margin: 1.75rem auto;
}

.section-divider {
  max-width: var(--container-max);
  margin: 0 auto;
  height: 1px;
  background: rgba(34, 35, 35, 0.1);
}

.section-label {
  font-family: var(--font-body);
  font-size: var(--text-small);
  font-weight: 500;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--color-river-green);
}

/* ============================================
   4. SCROLL REVEAL
============================================ */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.85s var(--ease-spring),
              transform 0.85s var(--ease-spring);
}

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

.reveal-stagger > .reveal:nth-child(1) { transition-delay: 0s; }
.reveal-stagger > .reveal:nth-child(2) { transition-delay: 0.15s; }
.reveal-stagger > .reveal:nth-child(3) { transition-delay: 0.3s; }
.reveal-stagger > .reveal:nth-child(4) { transition-delay: 0.45s; }
.reveal-stagger > .reveal:nth-child(5) { transition-delay: 0.6s; }
.reveal-stagger > .reveal:nth-child(6) { transition-delay: 0.75s; }

/* ============================================
   5. BUTTONS
============================================ */
.btn-primary {
  display: inline-block;
  padding: 1rem 2.5rem;
  border: 1px solid var(--color-stone);
  color: var(--color-stone);
  background: transparent;
  font-family: var(--font-body);
  font-size: var(--text-small);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: var(--ls-medium);
  text-decoration: none;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  isolation: isolate;
  transition: color 0.45s var(--ease-spring);
}

.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--color-stone);
  z-index: -1;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.45s var(--ease-spring);
}

.btn-primary:hover { color: var(--color-ivory); }
.btn-primary:hover::before { transform: scaleX(1); }

.btn-primary--light {
  border-color: var(--color-ivory);
  color: var(--color-ivory);
}

.btn-primary--light::before { background: var(--color-ivory); }
.btn-primary--light:hover { color: var(--color-stone); }

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-body);
  font-size: var(--text-small);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: var(--ls-medium);
  color: var(--color-stone);
  text-decoration: none;
  padding-bottom: 2px;
  position: relative;
}

.btn-secondary::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background: var(--color-stone);
  transition: background var(--duration-fast) var(--ease-smooth);
}

.btn-secondary:hover { color: var(--color-sunset); }
.btn-secondary:hover::after { background: var(--color-sunset); }

/* ============================================
   6. FOOTER (shared structure)
============================================ */
.site-footer {
  padding: clamp(3rem, 5vw, 5rem) 0 var(--space-lg);
  border-top: 1px solid rgba(34, 35, 35, 0.1);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.5fr;
  gap: var(--grid-gap);
}

.footer__logo { height: 70px; width: auto; margin-bottom: 1rem; }

.footer__tagline {
  font-family: var(--font-body);
  font-size: var(--text-small);
  text-transform: uppercase;
  letter-spacing: var(--ls-medium);
  color: var(--color-river-green);
  font-weight: 400;
  margin-bottom: 1.5rem;
}

.footer__social { display: flex; gap: 1.25rem; }

.footer__social a {
  color: var(--color-river-green);
  transition: color var(--duration-fast) var(--ease-smooth);
}

.footer__social a:hover { color: var(--color-stone); }
.footer__social svg { width: 18px; height: 18px; fill: currentColor; }

.footer__col-title {
  font-family: var(--font-body);
  font-size: var(--text-small);
  text-transform: uppercase;
  letter-spacing: var(--ls-wide);
  font-weight: 500;
  margin-bottom: 1.5rem;
  color: var(--color-stone);
}

.footer__link {
  display: block;
  color: var(--color-river-green);
  font-size: var(--text-body);
  font-weight: 400;
  margin-bottom: 0.75rem;
  transition: color var(--duration-fast) var(--ease-smooth);
}

.footer__link:hover { color: var(--color-stone); }

.footer__contact-info p {
  color: var(--color-river-green);
  font-size: var(--text-body);
  font-weight: 400;
  margin-bottom: 0.75rem;
  line-height: 1.6;
}

.footer__contact-info a {
  color: var(--color-river-green);
  transition: color var(--duration-fast) var(--ease-smooth);
}

.footer__contact-info a:hover { color: var(--color-stone); }

.footer-form__input,
.footer-form__textarea {
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--color-river-green);
  color: var(--color-stone);
  padding: 0.75rem 0;
  width: 100%;
  font-family: var(--font-body);
  font-size: var(--text-small);
  font-weight: 400;
  margin-bottom: 1rem;
  transition: border-color var(--duration-fast);
  outline: none;
  resize: none;
}

.footer-form__input::placeholder,
.footer-form__textarea::placeholder { color: var(--color-river-green); font-weight: 400; }

.footer-form__input:focus,
.footer-form__textarea:focus { border-color: var(--color-stone); }

.footer-form .btn-primary { width: 100%; text-align: center; margin-top: 0.5rem; }

.footer__bottom {
  margin-top: var(--space-xl);
  padding-top: var(--space-md);
  border-top: 1px solid rgba(34, 35, 35, 0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--text-small);
  color: var(--color-river-green);
}

.footer__legal { display: flex; gap: 1.5rem; }

.footer__legal a {
  color: var(--color-river-green);
  font-size: var(--text-small);
  transition: color var(--duration-fast) var(--ease-smooth);
}

.footer__legal a:hover { color: var(--color-stone); }

/* ============================================
   7. MOBILE MENU
============================================ */
.mobile-menu {
  position: fixed;
  inset: 0;
  background: var(--color-ivory);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-fast) var(--ease-smooth);
}

.mobile-menu.is-open { opacity: 1; pointer-events: all; }

.mobile-menu__close {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  font-size: 2rem;
  color: var(--color-stone);
  background: none;
  border: none;
  cursor: pointer;
  line-height: 1;
  padding: 0.5rem;
}

.mobile-menu__nav {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2.5rem;
}

.mobile-menu__link {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 5vw, 2.5rem);
  color: var(--color-stone);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-smooth);
}

.mobile-menu__link:hover { color: var(--color-sunset); }

/* ============================================
   8. LIGHTBOX
============================================ */
.ts-lb-trigger { cursor: zoom-in; }

.ts-lb {
  position: fixed;
  inset: 0;
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.92);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
  cursor: zoom-out;
}

.ts-lb.is-open { opacity: 1; visibility: visible; }
.ts-lb img { max-width: 90vw; max-height: 90vh; object-fit: contain; }

/* ============================================
   9. SHARED RESPONSIVE
============================================ */
@media (max-width: 1023px) {
  .footer__grid { grid-template-columns: 1fr 1fr; gap: var(--space-lg); }
}

@media (max-width: 767px) {
  .header__nav { display: none; }
  .header__hamburger { display: flex; }

  .footer__grid { grid-template-columns: 1fr; gap: var(--space-lg); }

  .footer__bottom {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
}