/* ============================================
   Yang Family Real Estate — Styles
   Seamless, scroll-driven, luxury-minimal
   ============================================ */

/* --- CSS Variables / Theming --- */
:root {
  --font-heading: 'Playfair Display', Georgia, serif;
  --font-body: 'Inter', -apple-system, sans-serif;

  --transition: 0.3s ease;
  --radius: 4px;
  --max-width: 1100px;

  /* Light theme (default) */
  --bg: #faf9f7;
  --text: #1a1a1a;
  --text-muted: #6b6b6b;
  --accent: #1a5c5e;
  --accent-hover: #15494b;
  --border: rgba(0, 0, 0, 0.06);
  --header-bg: rgba(250, 249, 247, 0.85);
  --footer-bg: #1a1a1a;
  --footer-text: #c0bdb8;
}

[data-theme="dark"] {
  --bg: #0f1a1a;
  --text: #e8e6e1;
  --text-muted: #8a8a8a;
  --accent: #2a9d8f;
  --accent-hover: #35b8a8;
  --border: rgba(255, 255, 255, 0.06);
  --header-bg: rgba(15, 26, 26, 0.85);
  --footer-bg: #0a1212;
  --footer-text: #6b7a7a;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-weight: 400;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  transition: background var(--transition), color var(--transition);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* --- Buttons --- */
.btn {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 14px 44px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--transition);
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.btn-primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  transform: translateY(-1px);
}

/* --- Header --- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: var(--header-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition), border-color var(--transition);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.header-logo img {
  height: 48px;
  width: auto;
}

[data-theme="dark"] .header-logo img,
[data-theme="dark"] .footer-logo img {
  filter: brightness(0) invert(1);
}

.nav {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav-link {
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  transition: color var(--transition);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width var(--transition);
}

.nav-link:hover {
  color: var(--text);
}

.nav-link:hover::after {
  width: 100%;
}

.nav-link.active {
  color: var(--text);
}

.nav-link.active::after {
  width: 100%;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.theme-toggle {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  padding: 6px;
  border-radius: 50%;
  transition: color var(--transition);
  display: flex;
  align-items: center;
}

.theme-toggle:hover {
  color: var(--text);
}

[data-theme="light"] .icon-moon { display: none; }
[data-theme="dark"] .icon-sun { display: none; }

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  flex-direction: column;
  gap: 5px;
}

.mobile-toggle span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--text);
  transition: all var(--transition);
}

/* --- Hero --- */
.hero {
  min-height: 100vh;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 72px 24px 0;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 0%, var(--accent), transparent 70%);
  opacity: 0.04;
  pointer-events: none;
}

.hero-text {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  z-index: 2;
}

/* --- Splash Intro --- */
.splash {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 3s cubic-bezier(0.4, 0, 0.2, 1);
}

.splash-logo-img {
  width: 340px;
  max-width: 70vw;
  height: auto;
  opacity: 0;
  transform: scale(0.96);
  transition: transform 1.1s cubic-bezier(0.4, 0, 0.2, 1),
              opacity 2.8s ease-out;
  transform-origin: center center;
  will-change: transform, opacity;
}

[data-theme="dark"] .splash-logo-img {
  filter: brightness(0) invert(1);
}

/* Enter state: splash fully visible, logo settled at full size */
.splash.splash-entered .splash-logo-img {
  opacity: 1;
  transform: scale(1);
}

/* Docking state: JS sets an inline transform to fly the logo into the header position,
   and adds .splash-leaving to fade the backdrop out. */
.splash.splash-leaving {
  opacity: 0;
  pointer-events: none;
}

/* Hide main UI until splash releases it */
body.splash-active .header,
body.splash-active .hero-text {
  opacity: 0;
}

.header,
.hero-text {
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.hero-eyebrow {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 28px;
}

.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(2.8rem, 6vw, 5rem);
  font-weight: 400;
  line-height: 1.1;
  margin-bottom: 28px;
  letter-spacing: -0.01em;
}

.hero-subtitle {
  font-size: 1.05rem;
  font-weight: 300;
  color: var(--text-muted);
  max-width: 460px;
  margin: 0 auto 52px;
  line-height: 1.8;
}

/* --- Page Hero (for subpages) --- */
.page-hero {
  padding: 180px 0 60px;
  text-align: center;
}

.page-eyebrow {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 20px;
}

.page-title {
  font-family: var(--font-heading);
  font-size: clamp(2.2rem, 4.5vw, 3.6rem);
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin-bottom: 20px;
}

.page-subtitle {
  font-size: 1rem;
  font-weight: 300;
  color: var(--text-muted);
  max-width: 520px;
  margin: 0 auto;
  line-height: 1.8;
}

/* --- Sections (shared — no distinct backgrounds) --- */
.section {
  padding: 100px 0;
}

/* --- Section Divider --- */
.section-divider {
  display: flex;
  justify-content: center;
  padding: 0 24px;
}

.divider-line {
  width: 100%;
  max-width: 200px;
  height: 1px;
  background: var(--border);
}

/* --- Values --- */
.values-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 60px;
}

.value-card {
  display: flex;
  flex-direction: column;
}

.value-icon {
  color: var(--accent);
  margin-bottom: 20px;
  display: flex;
  justify-content: center;
}

.value-title {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 14px;
  text-align: center;
  line-height: 1.35;
}

.value-text {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.8;
  text-align: left;
}

/* --- About --- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.about-image img {
  width: 100%;
  max-width: 400px;
  border-radius: var(--radius);
  object-fit: cover;
  aspect-ratio: 3 / 4;
}

.about-eyebrow {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}

.about-heading {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 400;
  margin-bottom: 24px;
}

.about-text {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 28px;
}

.about-affiliation {
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

/* --- Contact CTA --- */
.contact-content {
  text-align: center;
}

.contact-heading {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 400;
  margin-bottom: 16px;
}

.contact-subtext {
  font-size: 1rem;
  color: var(--text-muted);
  max-width: 480px;
  margin: 0 auto 44px;
  line-height: 1.8;
}

.contact-details {
  display: flex;
  justify-content: center;
  gap: 48px;
  margin-bottom: 44px;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: color var(--transition);
}

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

.contact-item svg {
  flex-shrink: 0;
  color: var(--accent);
}

.social-links {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-top: 40px;
}

.social-links a {
  color: var(--text-muted);
  transition: color var(--transition);
  display: flex;
  align-items: center;
}

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

.social-links svg {
  width: 20px;
  height: 20px;
}

/* --- Contact Page --- */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 80px;
  align-items: start;
}

.contact-info-block {
  margin-bottom: 32px;
}

.contact-label {
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.contact-value {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  color: var(--text);
  transition: color var(--transition);
}

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

.contact-value-static {
  font-size: 0.95rem;
  color: var(--text);
  line-height: 1.7;
}

.contact-social {
  margin-top: 40px;
  justify-content: flex-start;
}

/* Contact Form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-field label {
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.form-field input,
.form-field textarea {
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--text);
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--border);
  padding: 10px 0;
  transition: border-color var(--transition);
  resize: vertical;
}

.form-field textarea {
  min-height: 120px;
  line-height: 1.6;
}

.form-field input:focus,
.form-field textarea:focus {
  outline: none;
  border-bottom-color: var(--accent);
}

.contact-form .btn {
  align-self: flex-start;
  margin-top: 8px;
}

/* --- About Page — Minimal Contact --- */
.about-contact {
  padding: 80px 0 100px;
}

.about-contact-inner {
  text-align: center;
  max-width: 560px;
  margin: 0 auto;
}

.about-contact-inner .about-eyebrow {
  margin-bottom: 28px;
}

.about-contact-lines {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 36px;
}

.about-contact-line {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 400;
  color: var(--text);
  transition: color var(--transition);
}

a.about-contact-line:hover {
  color: var(--accent);
}

.about-contact-static {
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: var(--text-muted);
  letter-spacing: 0.02em;
  margin-top: 4px;
}

.about-contact-social {
  margin-top: 0;
}

/* --- Portfolio --- */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 56px 40px;
}

.portfolio-card {
  display: flex;
  flex-direction: column;
}

.portfolio-image {
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--border);
  margin-bottom: 22px;
}

.portfolio-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 4 / 3;
  transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.portfolio-image-placeholder {
  aspect-ratio: 4 / 3;
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    linear-gradient(135deg, rgba(42, 157, 143, 0.08), rgba(42, 157, 143, 0.02)),
    var(--border);
  border: 1px solid var(--border);
}

[data-theme="light"] .portfolio-image-placeholder {
  background:
    linear-gradient(135deg, rgba(26, 92, 94, 0.05), rgba(26, 92, 94, 0.015)),
    #f0efec;
}

.portfolio-image-placeholder-mark {
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-muted);
  font-weight: 500;
}

.portfolio-card:hover .portfolio-image img {
  transform: scale(1.04);
}

.portfolio-meta {
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 10px;
}

.portfolio-title {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 400;
  line-height: 1.3;
  margin-bottom: 12px;
  color: var(--text);
}

.portfolio-description {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.75;
}

.portfolio-empty {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.95rem;
  padding: 40px 0;
}

/* --- Testimonials --- */
.testimonials {
  padding: 40px 0 100px;
}

.testimonials-heading {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 400;
  text-align: center;
  margin-bottom: 16px;
}

.testimonials-eyebrow {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--accent);
  text-align: center;
  margin-bottom: 20px;
}

.testimonials-subtext {
  font-size: 1rem;
  color: var(--text-muted);
  text-align: center;
  max-width: 480px;
  margin: 0 auto 64px;
  line-height: 1.8;
}

.testimonials-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 32px;
}

.testimonial-card {
  flex: 1 1 280px;
  max-width: 360px;
  padding: 36px 32px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.015);
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition), transform var(--transition);
}

[data-theme="light"] .testimonial-card {
  background: rgba(0, 0, 0, 0.015);
}

.testimonial-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.testimonial-quote-mark {
  font-family: var(--font-heading);
  font-size: 3rem;
  line-height: 0.6;
  color: var(--accent);
  margin-bottom: 18px;
  font-style: italic;
}

.testimonial-quote {
  font-size: 0.95rem;
  color: var(--text);
  line-height: 1.75;
  margin-bottom: 24px;
  font-weight: 300;
  flex-grow: 1;
}

.testimonial-attribution {
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

.testimonial-name {
  font-family: var(--font-heading);
  font-size: 1rem;
  color: var(--text);
  margin-bottom: 4px;
}

.testimonial-context {
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
}

/* --- Footer --- */
.footer {
  background: var(--footer-bg);
  color: var(--footer-text);
  padding: 60px 0 40px;
  text-align: center;
  transition: background var(--transition), color var(--transition);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.footer-logo img {
  height: 60px;
  width: auto;
  opacity: 0.6;
  filter: brightness(0) invert(1);
}

.footer-address {
  font-size: 0.8rem;
  letter-spacing: 0.04em;
}

.footer-copy {
  font-size: 0.72rem;
  opacity: 0.4;
  margin-top: 8px;
}

/* --- Scroll-Driven Animations --- */
[data-scroll] {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94),
              transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

[data-scroll].in-view {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger value cards */
.value-card:nth-child(2) { transition-delay: 0.12s; }
.value-card:nth-child(3) { transition-delay: 0.24s; }

/* About: image slides from left, content from right */
.about-image[data-scroll] {
  transform: translateX(-32px);
}
.about-image[data-scroll].in-view {
  transform: translateX(0);
}

.about-content[data-scroll] {
  transform: translateX(32px);
}
.about-content[data-scroll].in-view {
  transform: translateX(0);
}


/* --- Responsive --- */
@media (max-width: 768px) {
  .nav {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--header-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    flex-direction: column;
    padding: 32px 24px;
    gap: 24px;
    border-bottom: 1px solid var(--border);
  }

  .nav.open {
    display: flex;
  }

  .mobile-toggle {
    display: flex;
  }

  .mobile-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(4px, 4px);
  }

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

  .mobile-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(4px, -4px);
  }

  .values-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
    text-align: center;
  }

  .about-image img {
    margin: 0 auto;
    max-width: 320px;
  }

  .about-image[data-scroll] {
    transform: translateY(32px);
  }

  .about-content[data-scroll] {
    transform: translateY(32px);
  }

  .contact-details {
    flex-direction: column;
    align-items: center;
    gap: 16px;
  }

  .section {
    padding: 72px 0;
  }

  .splash-logo-img {
    width: 240px;
  }

  .page-hero {
    padding: 140px 0 40px;
  }

  .contact-layout {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .portfolio-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .testimonials {
    padding: 20px 0 72px;
  }

  .testimonial-card {
    padding: 28px 24px;
  }
}