/* ========================================
   DESIGN TOKENS — Luxury Estate
   Dark theme with gold accents
   ======================================== */

:root {
  /* Type Scale */
  --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);

  /* Spacing */
  --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;

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

  /* Transitions */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in: cubic-bezier(0.4, 0, 1, 1);

  /* Content widths */
  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;
  --content-full: 100%;

  /* Fonts */
  --font-display: 'Cormorant', 'Georgia', serif;
  --font-body: 'Switzer', 'Helvetica Neue', sans-serif;
}

/* ========================================
   LUXURY DARK PALETTE
   ======================================== */

:root, [data-theme="dark"] {
  --color-bg:             #0d0c0a;
  --color-surface:        #151412;
  --color-surface-2:      #1c1a17;
  --color-surface-offset: #1a1815;
  --color-border:         #2e2b26;
  --color-divider:        #242220;

  --color-text:           #e8e4dc;
  --color-text-muted:     #9e9a92;
  --color-text-faint:     #5e5b55;
  --color-text-inverse:   #0d0c0a;

  --color-primary:        #c9a96e;
  --color-primary-hover:  #b89355;
  --color-primary-active: #a07d3e;

  --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.3);
  --shadow-md: 0 4px 12px oklch(0 0 0 / 0.4);
  --shadow-lg: 0 12px 32px oklch(0 0 0 / 0.5);
}

[data-theme="light"] {
  --color-bg:             #faf8f5;
  --color-surface:        #f5f2ed;
  --color-surface-2:      #edeae4;
  --color-surface-offset: #e8e5df;
  --color-border:         #d4d0c8;
  --color-divider:        #dcd8d0;

  --color-text:           #1c1a15;
  --color-text-muted:     #6b6760;
  --color-text-faint:     #a9a59e;
  --color-text-inverse:   #faf8f5;

  --color-primary:        #8b6914;
  --color-primary-hover:  #725410;
  --color-primary-active: #5c430d;

  --shadow-sm: 0 1px 2px oklch(0.2 0.01 80 / 0.06);
  --shadow-md: 0 4px 12px oklch(0.2 0.01 80 / 0.08);
  --shadow-lg: 0 12px 32px oklch(0.2 0.01 80 / 0.12);
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme]) {
    --color-bg:             #faf8f5;
    --color-surface:        #f5f2ed;
    --color-surface-2:      #edeae4;
    --color-surface-offset: #e8e5df;
    --color-border:         #d4d0c8;
    --color-divider:        #dcd8d0;
    --color-text:           #1c1a15;
    --color-text-muted:     #6b6760;
    --color-text-faint:     #a9a59e;
    --color-text-inverse:   #faf8f5;
    --color-primary:        #8b6914;
    --color-primary-hover:  #725410;
    --color-primary-active: #5c430d;
    --shadow-sm: 0 1px 2px oklch(0.2 0.01 80 / 0.06);
    --shadow-md: 0 4px 12px oklch(0.2 0.01 80 / 0.08);
    --shadow-lg: 0 12px 32px oklch(0.2 0.01 80 / 0.12);
  }
}

/* ========================================
   LAYOUT
   ======================================== */

.container {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

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

/* ========================================
   HEADER
   ======================================== */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: var(--space-4) 0;
  background: oklch(from var(--color-bg) l c h / 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: background 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out);
}

.header--scrolled {
  background: oklch(from var(--color-bg) l c h / 0.95);
  box-shadow: var(--shadow-sm);
}

.header__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.header__logo {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--color-primary);
  text-decoration: none;
  letter-spacing: 0.08em;
}

.header__nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.header__nav a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  transition: color var(--transition-interactive);
}

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

.theme-toggle {
  color: var(--color-text-muted);
  padding: var(--space-2);
  border-radius: var(--radius-full);
  transition: color var(--transition-interactive), background var(--transition-interactive);
}

.theme-toggle:hover {
  color: var(--color-primary);
  background: oklch(from var(--color-primary) l c h / 0.1);
}

.mobile-menu-btn {
  display: none;
  color: var(--color-text);
  padding: var(--space-2);
}

/* ========================================
   HERO SECTION
   ======================================== */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
}

.hero__image {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    oklch(0.05 0.01 60 / 0.95) 0%,
    oklch(0.05 0.01 60 / 0.6) 40%,
    oklch(0.05 0.01 60 / 0.2) 70%,
    transparent 100%
  );
  z-index: 1;
}

.hero__content {
  position: relative;
  z-index: 2;
  padding: var(--space-16) 0 var(--space-12);
  width: 100%;
}

.hero__tag {
  display: inline-block;
  font-size: var(--text-xs);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-primary);
  border: 1px solid oklch(from var(--color-primary) l c h / 0.4);
  padding: var(--space-1) var(--space-4);
  margin-bottom: var(--space-6);
}

.hero__title {
  font-family: var(--font-display);
  font-size: var(--text-hero);
  font-weight: 400;
  color: #fff;
  line-height: 1.05;
  margin-bottom: var(--space-4);
  max-width: 14ch;
}

.hero__address {
  font-size: var(--text-lg);
  color: rgba(255,255,255,0.7);
  font-weight: 300;
  margin-bottom: var(--space-8);
}

.hero__stats {
  display: flex;
  gap: var(--space-8);
  flex-wrap: wrap;
}

.hero__stat {
  text-align: left;
}

.hero__stat-value {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: #fff;
  font-weight: 500;
}

.hero__stat-label {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.5);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* ========================================
   PRICE RIBBON
   ======================================== */

.price-ribbon {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-6) 0;
}

.price-ribbon__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.price-ribbon__price {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  color: var(--color-primary);
  font-weight: 500;
}

.price-ribbon__cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-bg);
  background: var(--color-primary);
  padding: var(--space-3) var(--space-8);
  text-decoration: none;
  transition: background var(--transition-interactive), transform var(--transition-interactive);
}

.price-ribbon__cta:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
}

.price-ribbon__cta:active {
  transform: translateY(0);
}

/* ========================================
   OVERVIEW SECTION
   ======================================== */

.overview {
  padding: clamp(var(--space-12), 8vw, var(--space-24)) 0;
}

.overview__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: start;
}

.section-label {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}

.section-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 400;
  color: var(--color-text);
  margin-bottom: var(--space-6);
}

.overview__text p {
  color: var(--color-text-muted);
  font-size: var(--text-base);
  line-height: 1.7;
  margin-bottom: var(--space-4);
}

.overview__details {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
}

.detail-item {
  padding: var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
}

.detail-item__label {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-faint);
  margin-bottom: var(--space-1);
}

.detail-item__value {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--color-text);
}

/* ========================================
   GALLERY SECTION
   ======================================== */

.gallery {
  padding: clamp(var(--space-8), 6vw, var(--space-16)) 0;
}

.gallery__header {
  text-align: left;
  margin-bottom: var(--space-6);
}

/* Filter tabs */
.gallery__filters {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
  margin-bottom: var(--space-8);
}

.gallery__filter {
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  padding: var(--space-2) var(--space-4);
  border: 1px solid var(--color-border);
  background: transparent;
  cursor: pointer;
  transition: all var(--transition-interactive);
}

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

.gallery__filter--active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-text-inverse);
}

/* Gallery grid */
.gallery__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
}

.gallery__item {
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.gallery__item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s var(--ease-out);
}

.gallery__item:hover img {
  transform: scale(1.03);
}

.gallery__item--hero {
  grid-column: span 2;
  grid-row: span 2;
}

.gallery__item--hero img {
  aspect-ratio: 1/1;
}

.gallery__item:not(.gallery__item--hero) img {
  aspect-ratio: 16/10;
}

.gallery__item[data-hidden="true"] {
  display: none;
}

.gallery__caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--space-6) var(--space-4) var(--space-4);
  background: linear-gradient(to top, oklch(0 0 0 / 0.6), transparent);
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.9);
  font-weight: 300;
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 0.3s var(--ease-out), transform 0.3s var(--ease-out);
}

.gallery__item:hover .gallery__caption {
  opacity: 1;
  transform: translateY(0);
}

/* ========================================
   FEATURES SECTION
   ======================================== */

.features {
  padding: clamp(var(--space-12), 8vw, var(--space-24)) 0;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.features__header {
  margin-bottom: var(--space-10);
}

.features__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-1);
}

.feature-card {
  padding: var(--space-6) var(--space-8);
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  transition: border-color var(--transition-interactive);
}

.feature-card:hover {
  border-color: oklch(from var(--color-primary) l c h / 0.3);
}

.feature-card__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--color-text);
  font-weight: 400;
  margin-bottom: var(--space-2);
}

.feature-card__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ========================================
   FULL BLEED IMAGE
   ======================================== */

.full-bleed {
  position: relative;
  height: 60vh;
  min-height: 400px;
  overflow: hidden;
}

.full-bleed img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.full-bleed__overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: oklch(0.05 0.01 60 / 0.5);
}

.full-bleed__text {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  color: #fff;
  text-align: center;
  font-weight: 400;
  font-style: italic;
  max-width: 20ch;
}

/* ========================================
   FLOOR PLAN SECTION
   ======================================== */

.floorplan {
  padding: clamp(var(--space-12), 8vw, var(--space-24)) 0;
}

.floorplan__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: start;
}

.floorplan__levels {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.level {
  padding: var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
}

.level__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.level__rooms {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.level__room {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  padding: var(--space-1) var(--space-3);
  border: 1px solid var(--color-border);
  white-space: nowrap;
}

/* ========================================
   CONTACT SECTION
   ======================================== */

.contact {
  padding: clamp(var(--space-12), 8vw, var(--space-24)) 0;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
}

.contact__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: start;
}

.contact__info {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.agent-card {
  display: flex;
  gap: var(--space-4);
  align-items: center;
  padding: var(--space-6);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
}

.agent-card__avatar {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-full);
  background: var(--color-surface-2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  font-family: var(--font-display);
  font-size: var(--text-xl);
  flex-shrink: 0;
}

.agent-card__name {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.agent-card__role {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

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

.contact__detail svg {
  width: 18px;
  height: 18px;
  color: var(--color-primary);
  flex-shrink: 0;
}

.contact__detail a {
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-interactive);
}

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

.contact__form {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.form-group label {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-faint);
}

.form-group input,
.form-group textarea {
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  font-size: var(--text-base);
  transition: border-color var(--transition-interactive);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-submit {
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-bg);
  background: var(--color-primary);
  padding: var(--space-3) var(--space-8);
  border: none;
  cursor: pointer;
  transition: background var(--transition-interactive), transform var(--transition-interactive);
  align-self: flex-start;
}

.form-submit:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
}

.form-submit:active {
  transform: translateY(0);
}

/* ========================================
   FOOTER
   ======================================== */

.footer {
  padding: var(--space-8) 0;
  border-top: 1px solid var(--color-border);
}

.footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-4);
}

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

.footer__attribution a {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-decoration: none;
  transition: color var(--transition-interactive);
}

.footer__attribution a:hover {
  color: var(--color-text-muted);
}

/* ========================================
   LIGHTBOX
   ======================================== */

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: oklch(0 0 0 / 0.92);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s var(--ease-out);
}

.lightbox--active {
  opacity: 1;
  pointer-events: all;
}

.lightbox__img {
  max-width: 90vw;
  max-height: 85vh;
  object-fit: contain;
}

.lightbox__close {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  color: #fff;
  padding: var(--space-2);
  transition: opacity var(--transition-interactive);
}

.lightbox__close:hover {
  opacity: 0.7;
}

.lightbox__nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  color: #fff;
  padding: var(--space-4);
  transition: opacity var(--transition-interactive);
}

.lightbox__nav:hover {
  opacity: 0.7;
}

.lightbox__nav--prev { left: var(--space-4); }
.lightbox__nav--next { right: var(--space-4); }

/* ========================================
   SCROLL ANIMATIONS
   ======================================== */

.fade-in { opacity: 1; }

@supports (animation-timeline: scroll()) {
  .fade-in {
    opacity: 0;
    animation: reveal-fade linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 80%;
  }
}

@keyframes reveal-fade {
  to { opacity: 1; }
}

/* ========================================
   RESPONSIVE
   ======================================== */

@media (max-width: 1024px) {
  .overview__grid,
  .floorplan__grid,
  .contact__grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .features__grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .header__nav {
    display: none;
  }

  .header__nav--open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-4);
    gap: var(--space-4);
  }

  .mobile-menu-btn {
    display: block;
  }

  .hero__title {
    font-size: var(--text-2xl);
  }

  .hero__stats {
    gap: var(--space-4);
  }

  .gallery__grid {
    grid-template-columns: 1fr 1fr;
  }

  .gallery__item--hero {
    grid-column: span 2;
    grid-row: span 1;
  }

  .gallery__item--hero img {
    aspect-ratio: 16/10;
  }

  .overview__details {
    grid-template-columns: 1fr;
  }

  .price-ribbon__inner {
    flex-direction: column;
    align-items: flex-start;
  }
}