/* ============================================
   GM HOMES — Refined Design System
   Palette: warm charcoal, gold accent, cream surfaces
   Typography: Playfair Display + Satoshi
   ============================================ */

/* --- Design Tokens --- */
: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(2.75rem, 0.5rem + 7vw, 6.5rem);

  /* 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;

  /* Content widths */
  --content-narrow: 640px;
  --content-default: 1100px;
  --content-wide: 1320px;
  --content-full: 100%;

  /* Transitions */
  --transition: 200ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 400ms cubic-bezier(0.16, 1, 0.3, 1);

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

  /* Fonts */
  --font-display: 'Playfair Display', Georgia, serif;
  --font-body: 'Satoshi', 'Inter', -apple-system, sans-serif;
}

/* --- Light Mode (Default) --- */
:root,
[data-theme='light'] {
  --color-bg: #FAF8F5;
  --color-surface: #FFFFFF;
  --color-surface-2: #F5F2ED;
  --color-surface-offset: #EDE8E0;
  --color-border: #E0DAD0;
  --color-divider: #E8E3DA;

  --color-text: #1A1B1F;
  --color-text-muted: #6B6660;
  --color-text-faint: #A8A29A;
  --color-text-inverse: #FAF8F5;

  --color-dark: #1A1B1F;
  --color-dark-surface: #222328;
  --color-dark-border: #33353C;

  --color-accent: #C9A961;
  --color-accent-hover: #B8965A;
  --color-accent-soft: #F0E6D2;

  --shadow-sm: 0 1px 3px rgba(26, 27, 31, 0.06);
  --shadow-md: 0 4px 16px rgba(26, 27, 31, 0.08);
  --shadow-lg: 0 16px 48px rgba(26, 27, 31, 0.12);
}

/* --- Dark Mode --- */
[data-theme='dark'] {
  --color-bg: #131418;
  --color-surface: #1A1B20;
  --color-surface-2: #1F2026;
  --color-surface-offset: #26272E;
  --color-border: #33353C;
  --color-divider: #2A2B31;

  --color-text: #E8E4DE;
  --color-text-muted: #9B9690;
  --color-text-faint: #6B6660;
  --color-text-inverse: #131418;

  --color-dark: #0E0F12;
  --color-dark-surface: #1A1B20;
  --color-dark-border: #33353C;

  --color-accent: #D4B574;
  --color-accent-hover: #E0C488;
  --color-accent-soft: #2A2520;

  --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);
}

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

html {
  -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);
  overflow-x: hidden;
}

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

ul { list-style: none; }

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

button {
  cursor: pointer;
  background: none;
  border: none;
  font: inherit;
  color: inherit;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 1.15;
  text-wrap: balance;
}

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

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

::selection {
  background: var(--color-accent);
  color: var(--color-dark);
}

/* --- Utility --- */
.section-label {
  display: inline-block;
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}

.section-label--gold {
  color: var(--color-accent);
}

.section-title {
  font-size: var(--text-xl);
  font-weight: 500;
  margin-bottom: var(--space-6);
  color: var(--color-text);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4) var(--space-8);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  cursor: pointer;
  white-space: nowrap;
}

.btn--gold {
  background: var(--color-accent);
  color: var(--color-dark);
  border: 1px solid var(--color-accent);
}

.btn--gold:hover {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn--outline {
  background: transparent;
  color: var(--color-text-inverse, #FAF8F5);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn--outline:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: rgba(201, 169, 97, 0.05);
}

/* --- Header --- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  transition: transform var(--transition), background var(--transition), box-shadow var(--transition);
  background: transparent;
}

.header--scrolled {
  background: color-mix(in oklab, var(--color-bg) 92%, transparent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: var(--shadow-sm);
}

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

.header__container {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: var(--space-4) var(--space-8);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}

/* --- Logo --- */
.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  transition: color var(--transition);
}

.logo__mark {
  width: 36px;
  height: 36px;
  color: var(--color-accent);
  flex-shrink: 0;
}

.logo__text {
  color: var(--color-text);
}

.logo__accent {
  color: var(--color-accent);
  margin-left: 2px;
}

.logo--footer {
  color: var(--color-text-inverse);
}

.logo--footer .logo__text {
  color: var(--color-text-inverse);
}

/* When header is transparent (on hero), use white text */
.header:not(.header--scrolled) .logo,
.header:not(.header--scrolled) .nav__link {
  color: #FFFFFF;
}

.header:not(.header--scrolled) .logo__text {
  color: #FFFFFF;
}

/* --- Nav --- */
.nav {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav__link {
  font-size: var(--text-sm);
  font-weight: 400;
  color: var(--color-text);
  position: relative;
  padding: var(--space-2) 0;
  transition: color var(--transition);
}

.header:not(.header--scrolled) .nav__link {
  color: rgba(255, 255, 255, 0.85);
}

.header:not(.header--scrolled) .nav__link:hover,
.header:not(.header--scrolled) .nav__link--active {
  color: var(--color-accent);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-accent);
  transition: width var(--transition);
}

.nav__link:hover::after,
.nav__link--active::after {
  width: 100%;
}

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

.header__toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text);
  padding: var(--space-2);
  transition: color var(--transition);
}

.header:not(.header--scrolled) .header__toggle {
  color: rgba(255, 255, 255, 0.85);
}

.header__menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
}

.header__menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  transition: all var(--transition);
}

.header:not(.header--scrolled) .header__menu-toggle span {
  background: #FFFFFF;
}

.header__menu-toggle--active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.header__menu-toggle--active span:nth-child(2) {
  opacity: 0;
}

.header__menu-toggle--active span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -7px);
}

/* --- Hero --- */
.hero {
  position: relative;
  min-height: max(100vh, 620px);
  padding-top: 96px;
  padding-bottom: 96px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

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

.hero__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(
    180deg,
    rgba(26, 27, 31, 0.5) 0%,
    rgba(26, 27, 31, 0.3) 30%,
    rgba(26, 27, 31, 0.6) 70%,
    rgba(26, 27, 31, 0.85) 100%
  );
}

.hero__content {
  position: relative;
  z-index: 2;
  max-width: 800px;
  text-align: center;
  padding: 0 var(--space-8);
  color: #FFFFFF;
}

.hero__eyebrow {
  display: inline-block;
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.3em;
  color: var(--color-accent);
  margin-bottom: var(--space-6);
}

.hero__title {
  font-family: var(--font-display);
  font-size: var(--text-hero);
  font-weight: 500;
  line-height: 1.1;
  margin-bottom: var(--space-6);
  text-wrap: balance;
}

.hero__subtitle {
  font-size: var(--text-base);
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.8);
  max-width: 560px;
  margin: 0 auto var(--space-10);
}

.hero__actions {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
}

.hero__scroll {
  position: absolute;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  color: rgba(255, 255, 255, 0.5);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  animation: scrollBounce 2s ease-in-out infinite;
}

@keyframes scrollBounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* --- Properties Grid --- */
.properties {
  padding: clamp(var(--space-16), 8vw, var(--space-24)) var(--space-8);
  max-width: var(--content-wide);
  margin: 0 auto;
}

.properties__header {
  text-align: center;
  margin-bottom: var(--space-16);
}

.properties__header .section-title {
  font-size: var(--text-2xl);
}

.properties__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
}

.property-card {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
  aspect-ratio: 3/4;
}

.property-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.property-card__image {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.property-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.property-card:hover .property-card__image img {
  transform: scale(1.08);
}

.property-card__image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(26, 27, 31, 0.1) 0%,
    rgba(26, 27, 31, 0.2) 40%,
    rgba(26, 27, 31, 0.8) 100%
  );
  transition: background var(--transition);
}

.property-card:hover .property-card__image::after {
  background: linear-gradient(
    180deg,
    rgba(26, 27, 31, 0.15) 0%,
    rgba(26, 27, 31, 0.3) 40%,
    rgba(26, 27, 31, 0.9) 100%
  );
}

.property-card__content {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 2;
  padding: var(--space-6);
  color: #FFFFFF;
}

.property-card__content h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-2);
  color: #FFFFFF;
}

.property-card__content p {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.75);
  line-height: 1.5;
  opacity: 0;
  max-height: 0;
  overflow: hidden;
  transition: opacity var(--transition), max-height var(--transition);
}

.property-card:hover .property-card__content p {
  opacity: 1;
  max-height: 80px;
}

.property-card__content h3 {
  position: relative;
  padding-bottom: var(--space-2);
}

.property-card__content h3::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 32px;
  height: 2px;
  background: var(--color-accent);
}

/* --- Property Detail Sections --- */
.property-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: 0 var(--space-8);
  gap: 0;
}

.property-detail__image {
  height: 600px;
  overflow: hidden;
  position: relative;
}

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

.property-detail--reverse .property-detail__image {
  order: 2;
}

.property-detail__content {
  padding: var(--space-16) clamp(var(--space-8), 5vw, var(--space-16));
}

.property-detail__content .section-title {
  font-size: var(--text-xl);
  margin-bottom: var(--space-6);
}

.property-detail__content p {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-6);
}

.property-detail__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.property-detail__list li {
  position: relative;
  padding-left: var(--space-6);
  font-size: var(--text-sm);
  color: var(--color-text);
  line-height: 1.5;
}

.property-detail__list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 16px;
  height: 1px;
  background: var(--color-accent);
}

/* --- Dual CTA --- */
.cta-dual {
  padding: clamp(var(--space-16), 8vw, var(--space-24)) var(--space-8);
  background: var(--color-surface-2);
}

.cta-dual__container {
  max-width: var(--content-wide);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
}

.cta-card {
  padding: clamp(var(--space-10), 4vw, var(--space-16));
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.cta-card--light {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
}

.cta-card--dark {
  background: var(--color-dark);
  color: var(--color-text-inverse);
}

.cta-card h3 {
  font-size: var(--text-xl);
  margin-bottom: var(--space-4);
}

.cta-card--dark h3 {
  color: #FFFFFF;
}

.cta-card p {
  font-size: var(--text-base);
  line-height: 1.7;
  margin-bottom: var(--space-8);
}

.cta-card--light p {
  color: var(--color-text-muted);
}

.cta-card--dark p {
  color: rgba(255, 255, 255, 0.7);
}

/* --- About --- */
.about {
  padding: clamp(var(--space-20), 10vw, var(--space-32)) var(--space-8);
  text-align: center;
}

.about__container {
  max-width: var(--content-narrow);
  margin: 0 auto;
}

.about__container .section-title {
  font-size: var(--text-2xl);
  margin-bottom: var(--space-8);
}

.about__lead {
  font-size: var(--text-lg);
  line-height: 1.6;
  color: var(--color-text);
  margin-bottom: var(--space-6);
  font-weight: 400;
}

.about__body {
  font-size: var(--text-base);
  line-height: 1.8;
  color: var(--color-text-muted);
}

/* --- Closing Banner --- */
.closing-banner {
  position: relative;
  min-height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

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

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

.closing-banner__overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(
    135deg,
    rgba(26, 27, 31, 0.9) 0%,
    rgba(26, 27, 31, 0.6) 100%
  );
}

.closing-banner__content {
  position: relative;
  z-index: 2;
  max-width: 640px;
  text-align: center;
  padding: 0 var(--space-8);
  color: #FFFFFF;
}

.closing-banner__content h2 {
  font-size: var(--text-2xl);
  margin-bottom: var(--space-4);
  color: #FFFFFF;
}

.closing-banner__content p {
  font-size: var(--text-base);
  color: rgba(255, 255, 255, 0.75);
  margin-bottom: var(--space-8);
  max-width: none;
}

.closing-banner__actions {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
}

/* --- Footer --- */
.footer {
  background: var(--color-dark);
  color: var(--color-text-inverse);
  padding: var(--space-20) var(--space-8) 0;
}

.footer__container {
  max-width: var(--content-wide);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  padding-bottom: var(--space-16);
}

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

.footer__tagline {
  color: rgba(255, 255, 255, 0.5);
  font-size: var(--text-sm);
  max-width: 320px;
}

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

.footer__item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  color: rgba(255, 255, 255, 0.7);
}

.footer__item svg {
  color: var(--color-accent);
  flex-shrink: 0;
  margin-top: 2px;
}

.footer__label {
  display: block;
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: rgba(255, 255, 255, 0.4);
  margin-bottom: var(--space-1);
}

.footer__item a {
  color: rgba(255, 255, 255, 0.85);
  font-size: var(--text-sm);
  transition: color var(--transition);
}

.footer__item a:hover {
  color: var(--color-accent);
}

.footer__item span {
  font-size: var(--text-sm);
}

.footer__bar {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: var(--space-6) 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer__bar p {
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.4);
}

.footer__bar a {
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.5);
  transition: color var(--transition);
}

.footer__bar a:hover {
  color: var(--color-accent);
}

/* --- Scroll Reveal --- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .properties__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .property-detail {
    grid-template-columns: 1fr;
  }

  .property-detail__image {
    height: 400px;
    order: 0 !important;
  }

  .property-detail--reverse .property-detail__image {
    order: 0 !important;
  }

  .cta-dual__container {
    grid-template-columns: 1fr;
  }

  .footer__container {
    grid-template-columns: 1fr;
    gap: var(--space-12);
  }
}

@media (max-width: 768px) {
  .nav {
    display: none;
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--color-surface);
    flex-direction: column;
    padding: var(--space-6);
    gap: var(--space-4);
    box-shadow: var(--shadow-lg);
  }

  .nav--open {
    display: flex;
  }

  .nav__link {
    color: var(--color-text) !important;
    width: 100%;
    padding: var(--space-3) 0;
    border-bottom: 1px solid var(--color-border);
  }

  .header__menu-toggle {
    display: flex;
  }

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

  .property-card {
    aspect-ratio: 16/10;
  }

  .property-card__content p {
    opacity: 1;
    max-height: 80px;
  }

  .hero__actions,
  .closing-banner__actions {
    flex-direction: column;
    width: 100%;
  }

  .btn {
    width: 100%;
  }

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

  .footer__bar {
    flex-direction: column;
    gap: var(--space-3);
    text-align: center;
  }
}

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

  .reveal {
    opacity: 1;
    transform: none;
  }
}