/* ============================================
   TANGRAM ARCHITECTURE STUDIO — Architecture Portfolio
   Light Architectural Theme
   ============================================ */

/* --- CSS Custom Properties --- */
:root {
  --bg-primary: #faf9f6;
  --bg-secondary: #f3f1ec;
  --bg-tertiary: #eae6df;
  --accent: #b8935c;
  --accent-dim: rgba(184, 147, 92, 0.12);
  --accent-glow: rgba(184, 147, 92, 0.2);
  --text-primary: #1c1b18;
  --text-secondary: #6e6962;
  --text-muted: #9e9890;
  --border: rgba(0, 0, 0, 0.08);
  --border-light: rgba(0, 0, 0, 0.12);
  --font-display: 'Playfair Display', Georgia, serif;
  --font-body: 'Inter', -apple-system, sans-serif;
  --font-mono: 'Space Grotesk', monospace;
  --transition-smooth: cubic-bezier(0.76, 0, 0.24, 1);
  --transition-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

html {
  scroll-behavior: smooth;
  scrollbar-width: thin;
  scrollbar-color: var(--accent) var(--bg-secondary);
}

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-secondary); }
::-webkit-scrollbar-thumb { background: var(--accent); border-radius: 3px; }

body {
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-weight: 300;
  line-height: 1.7;
  overflow-x: hidden;
  cursor: none;
}

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

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

/* --- Custom Cursor --- */
.cursor {
  position: fixed;
  top: 0; left: 0;
  width: 8px; height: 8px;
  background: var(--accent);
  border-radius: 50%;
  pointer-events: none;
  z-index: 9999;
  transform: translate(-50%, -50%);
  transition: width 0.3s, height 0.3s, background 0.3s;
  mix-blend-mode: normal;
}

.cursor-follower {
  position: fixed;
  top: 0; left: 0;
  width: 36px; height: 36px;
  border: 1px solid rgba(184, 147, 92, 0.4);
  border-radius: 50%;
  pointer-events: none;
  z-index: 9998;
  transform: translate(-50%, -50%);
  transition: all 0.15s ease-out;
}

.cursor.active { width: 4px; height: 4px; background: #1c1b18; }
.cursor-follower.active { width: 60px; height: 60px; border-color: rgba(28,27,24,0.3); background: rgba(28,27,24,0.03); }

@media (max-width: 768px) {
  .cursor, .cursor-follower { display: none; }
  body { cursor: auto; }
  button { cursor: pointer; }
}

/* --- Loader --- */
.loader {
  position: fixed;
  inset: 0;
  background: var(--bg-primary);
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.6s var(--transition-smooth), visibility 0.6s;
}

.loader.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.loader-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
}

.loader-logo {
  width: 80px;
  height: 80px;
  opacity: 0;
  animation: loaderLogoSpin 1s cubic-bezier(0.34, 1.56, 0.64, 1) 0.1s forwards;
}

@keyframes loaderLogoSpin {
  0% {
    opacity: 0;
    transform: rotate(-180deg) scale(0.5);
  }
  60% {
    opacity: 1;
    transform: rotate(10deg) scale(1.05);
  }
  100% {
    opacity: 1;
    transform: rotate(0deg) scale(1);
  }
}

.loader-line {
  width: 0;
  height: 1px;
  background: var(--accent);
  animation: loaderExpand 1s var(--transition-smooth) forwards;
}

@keyframes loaderExpand {
  from { width: 0; }
  to { width: 120px; }
}

.loader-text {
  font-family: "Kunstler Script", "Bickham Script Pro", "Great Vibes", "Snell Roundhand", cursive;
  font-size: 1.6rem;
  letter-spacing: 0.03em;
  color: var(--text-secondary);
  opacity: 0;
  animation: loaderFadeIn 0.6s 0.4s forwards;
}

@keyframes loaderFadeIn {
  to { opacity: 1; }
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 0 48px;
  transition: all 0.4s var(--transition-smooth);
}

.nav.scrolled {
  background: rgba(250, 249, 246, 0.9);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  z-index: 1001;
}

.logo-icon {
  width: 22px;
  height: 22px;
  transition: transform 0.4s var(--transition-bounce);
  flex-shrink: 0;
}

.nav-logo:hover .logo-icon {
  transform: rotate(180deg);
}

.logo-text {
  font-family: "Kunstler Script", "Bickham Script Pro", "Great Vibes", "Snell Roundhand", cursive;
  font-size: 2rem;
  font-weight: 400;
  letter-spacing: 0.02em;
  color: var(--text-primary);
}

.nav-links {
  display: flex;
  gap: 48px;
}

.nav-link {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 400;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-secondary);
  position: relative;
  padding: 4px 0;
  transition: color 0.3s;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width 0.3s var(--transition-smooth);
}

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

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

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  z-index: 1001;
  padding: 8px;
}

.nav-toggle span {
  width: 24px;
  height: 1.5px;
  background: var(--text-primary);
  transition: all 0.3s var(--transition-smooth);
}

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

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

.nav-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

@media (max-width: 768px) {
  .nav { padding: 0 24px; }
  .nav-toggle { display: flex; }

  .nav-links {
    position: fixed;
    inset: 0;
    background: rgba(250, 249, 246, 0.98);
    backdrop-filter: blur(30px);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 40px;
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s var(--transition-smooth);
  }

  .nav-links.open {
    opacity: 1;
    visibility: visible;
  }

  .nav-link {
    font-size: 1.2rem;
  }
}

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

.hero-bg {
  position: absolute;
  inset: -10%;
  background:
    radial-gradient(ellipse at 25% 15%, rgba(184, 147, 92, 0.08) 0%, transparent 55%),
    radial-gradient(ellipse at 75% 55%, rgba(160, 140, 110, 0.05) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 85%, rgba(180, 160, 130, 0.04) 0%, transparent 45%),
    var(--bg-primary);
  z-index: 0;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(0deg, var(--bg-primary) 0%, transparent 35%);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 900px;
  padding: 0 24px;
}

.hero-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 32px;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(3.5rem, 8vw, 7rem);
  font-weight: 400;
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin-bottom: 32px;
  color: var(--text-primary);
}

.hero-title em {
  font-style: italic;
  color: var(--accent);
}

.hero-sub {
  font-size: clamp(1rem, 1.5vw, 1.15rem);
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto 48px;
  line-height: 1.8;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-primary);
  padding: 16px 40px;
  border: 1px solid var(--border-light);
  border-radius: 100px;
  transition: all 0.4s var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.hero-cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.4s var(--transition-smooth);
  z-index: -1;
  border-radius: 100px;
}

.hero-cta:hover {
  border-color: var(--accent);
  color: #fff;
}

.hero-cta:hover::before {
  transform: scaleX(1);
  transform-origin: left;
}

.hero-cta:hover svg {
  animation: bounceDown 0.6s var(--transition-bounce);
}

@keyframes bounceDown {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(4px); }
}

.hero-scroll {
  position: absolute;
  bottom: 48px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.scroll-line {
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, var(--text-muted), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; transform: scaleY(0.8); transform-origin: top; }
  50% { opacity: 1; transform: scaleY(1); transform-origin: top; }
}

/* --- Reveal Animations --- */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s var(--transition-smooth), transform 0.8s var(--transition-smooth);
}

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

.reveal:nth-child(2) { transition-delay: 0.1s; }
.reveal:nth-child(3) { transition-delay: 0.2s; }
.reveal:nth-child(4) { transition-delay: 0.3s; }

/* --- Section Common --- */
section {
  padding: 140px 48px;
}

.section-header {
  text-align: center;
  margin-bottom: 72px;
}

.section-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--accent);
  display: block;
  margin-bottom: 20px;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin-bottom: 24px;
  color: var(--text-primary);
}

.section-title em {
  font-style: italic;
  color: var(--accent);
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 500px;
  margin: 0 auto;
  line-height: 1.8;
}

/* --- Projects --- */
.projects {
  max-width: 1400px;
  margin: 0 auto;
  background: var(--bg-secondary);
  padding: 140px 48px;
  border-radius: 4px;
}

.filter-bar {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 64px;
  flex-wrap: wrap;
}

.filter-btn {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  padding: 10px 24px;
  border: 1px solid var(--border);
  border-radius: 100px;
  color: var(--text-secondary);
  transition: all 0.3s var(--transition-smooth);
  background: transparent;
}

.filter-btn:hover,
.filter-btn.active {
  color: var(--text-primary);
  border-color: var(--accent);
  background: var(--accent-dim);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
  gap: 32px;
}

@media (max-width: 768px) {
  .projects-grid {
    grid-template-columns: 1fr;
  }
  .projects {
    padding: 100px 24px;
  }
}

.cat-header {
  grid-column: 1 / -1;
  padding: 48px 0 8px 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 24px;
  transition: all 0.5s var(--transition-smooth);
}

.cat-header:first-child {
  padding-top: 0;
}

.cat-header span {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.cat-header.hidden-card {
  opacity: 0;
  height: 0;
  padding: 0;
  margin: 0;
  border: 0;
  overflow: hidden;
}

.project-card {
  position: relative;
  transition: all 0.5s var(--transition-smooth);
}

.project-card.hidden-card {
  opacity: 0;
  transform: scale(0.92);
  pointer-events: none;
  position: absolute;
}

.card-image {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  margin-bottom: 20px;
  background: var(--bg-tertiary);
  border-radius: 2px;
}

.card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s var(--transition-smooth);
}

.project-card:hover .card-image img {
  transform: scale(1.05);
}

.card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(28,27,24,0.7) 0%, transparent 50%);
  display: flex;
  align-items: flex-end;
  padding: 32px;
  opacity: 0;
  transition: opacity 0.4s var(--transition-smooth);
}

.project-card:hover .card-overlay {
  opacity: 1;
}

.card-view {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 8px;
  transform: translateY(10px);
  transition: transform 0.4s var(--transition-smooth);
}

.project-card:hover .card-view {
  transform: translateY(0);
}

.card-view span {
  color: var(--accent);
  transition: transform 0.3s;
}

.project-card:hover .card-view span {
  transform: translateX(4px);
}

.card-info {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.card-cat {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
}

.card-title {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 400;
  color: var(--text-primary);
  transition: color 0.3s;
}

.project-card:hover .card-title {
  color: var(--accent);
}

.card-location {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* --- Services --- */
.services {
  max-width: 1400px;
  margin: 0 auto;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 32px;
  margin-bottom: 100px;
}

.service-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 40px 32px;
  transition: all 0.3s var(--transition-smooth);
}

.service-card:hover {
  box-shadow: 0 8px 40px rgba(0,0,0,0.06);
  border-color: var(--accent);
}

.service-icon {
  margin-bottom: 24px;
}

.service-title {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.service-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
}

.service-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.service-list li {
  font-size: 0.85rem;
  color: var(--text-muted);
  padding-left: 20px;
  position: relative;
}

.service-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.5;
}

/* Service Process */
.service-process {
  text-align: center;
  padding-top: 60px;
  border-top: 1px solid var(--border);
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 32px;
  margin-top: 48px;
  text-align: left;
}

.step {
  padding: 0 16px;
}

.step-num {
  font-family: var(--font-display);
  font-size: 2.5rem;
  color: var(--accent);
  opacity: 0.3;
  display: block;
  margin-bottom: 12px;
}

.step h4 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.step p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.6;
}

@media (max-width: 768px) {
  .services-grid {
    grid-template-columns: 1fr;
    margin-bottom: 60px;
  }

  .process-steps {
    grid-template-columns: 1fr;
    gap: 24px;
  }

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

/* --- About --- */
.about {
  max-width: 1400px;
  margin: 0 auto;
}

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

@media (max-width: 768px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }
}

.about-visual {
  position: relative;
}

.about-image-placeholder {
  aspect-ratio: 3 / 4;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 1;
}

.about-photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: absolute;
  inset: 0;
  border-radius: 50% / 40%;
}

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

.placeholder-icon {
  font-size: 4rem;
  color: var(--accent);
  opacity: 0.3;
  animation: floatIcon 4s ease-in-out infinite;
}

@keyframes floatIcon {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

.about-accent {
  position: absolute;
  top: 24px;
  left: 24px;
  right: -24px;
  bottom: -24px;
  border: 1px solid var(--accent);
  opacity: 0.15;
  z-index: 0;
  border-radius: 50% / 40%;
}

.about-content {
  display: flex;
  flex-direction: column;
}

.about-text {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.9;
  margin-bottom: 20px;
}

.about-stats-mini {
  display: flex;
  gap: 48px;
  margin: 32px 0;
  padding: 32px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.mini-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.mini-num {
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--accent);
}

.mini-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.about-signature {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 12px;
}

/* --- About Timeline --- */
.about-timeline {
  max-width: 900px;
  margin: 80px auto 40px;
}

.timeline-item {
  display: flex;
  gap: 32px;
  padding: 0 0 40px;
  position: relative;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: 48px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--border);
}

.timeline-item:last-child::before {
  display: none;
}

.timeline-marker {
  font-family: var(--font-display);
  font-size: 1.3rem;
  color: var(--accent);
  min-width: 96px;
  text-align: right;
  padding-top: 2px;
  flex-shrink: 0;
  position: relative;
  z-index: 1;
}

.timeline-content {
  flex: 1;
}

.timeline-content h4 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.timeline-content p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

@media (max-width: 768px) {
  .about-timeline {
    margin: 60px 0 32px;
  }

  .timeline-item {
    gap: 16px;
    padding-bottom: 32px;
  }

  .timeline-item::before {
    left: 24px;
  }

  .timeline-marker {
    min-width: 50px;
    font-size: 1rem;
  }

  .timeline-content h4 {
    font-size: 1rem;
  }
}

.about-signature {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 12px;
}

.sig-line {
  width: 40px;
  height: 1px;
  background: var(--accent);
}

.sig-text {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.1rem;
  color: var(--text-muted);
}

/* --- Stats Section --- */
.stats {
  position: relative;
  overflow: hidden;
}

.stats .section-header {
  position: relative;
  z-index: 1;
  margin-bottom: 64px;
}

.stats-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at center, rgba(184, 147, 92, 0.06) 0%, transparent 70%),
    var(--bg-secondary);
  z-index: 0;
}

.stats-grid {
  position: relative;
  z-index: 1;
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 48px;
  text-align: center;
}

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

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.stat-number {
  font-family: var(--font-display);
  font-size: clamp(3rem, 6vw, 5rem);
  font-weight: 400;
  color: var(--accent);
  line-height: 1;
}

.stat-number::after {
  content: '+';
  font-size: 0.5em;
  vertical-align: super;
}

.stat-number.no-plus::after {
  content: '%';
}

.stat-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-primary);
}

.stat-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.stat-item-wide {
  grid-column: 1 / -1;
}

.stat-cities-toggle {
  display: inline;
  cursor: pointer;
  font-size: 0.85rem;
  color: var(--accent);
  background: none;
  border: none;
  border-bottom: 1px dashed var(--accent);
  padding: 0;
  transition: color 0.3s, border-color 0.3s;
  user-select: none;
  pointer-events: auto;
}

.stat-cities-toggle:hover {
  color: var(--text-primary);
  border-bottom-color: var(--text-primary);
}

.stat-cities-list {
  max-width: 700px;
  line-height: 1.8;
  animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* --- Contact --- */
.contact {
  max-width: 1400px;
  margin: 0 auto;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

@media (max-width: 768px) {
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }
}

.contact-desc {
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 40px;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 0.95rem;
  color: var(--text-secondary);
  transition: color 0.3s;
}

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

.contact-icon {
  font-size: 1.2rem;
}

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

.form-group {
  position: relative;
}

.form-group label {
  position: absolute;
  top: -8px;
  left: 16px;
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-muted);
  background: var(--bg-primary);
  padding: 0 8px;
  opacity: 0;
  transform: translateY(4px);
  transition: all 0.3s;
  pointer-events: none;
}

.form-group input:focus ~ label,
.form-group input:not(:placeholder-shown) ~ label,
.form-group textarea:focus ~ label,
.form-group textarea:not(:placeholder-shown) ~ label,
.form-group select:focus ~ label,
.form-group select:valid ~ label {
  opacity: 1;
  transform: translateY(0);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 16px 20px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 0.95rem;
  transition: all 0.3s;
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

.form-group select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%239e9890' stroke-width='1.5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 20px center;
}

.form-group select option {
  background: #fff;
  color: var(--text-primary);
}

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

.form-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 18px 36px;
  background: var(--accent);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border-radius: 8px;
  transition: all 0.4s var(--transition-smooth);
  align-self: flex-start;
}

.form-btn:hover {
  background: #a07d4c;
  gap: 20px;
}

.form-btn:hover svg {
  animation: arrowRight 0.5s var(--transition-bounce);
}

@keyframes arrowRight {
  0%, 100% { transform: translateX(0); }
  50% { transform: translateX(6px); }
}

/* --- Footer --- */
.footer {
  border-top: 1px solid var(--border);
  padding: 48px;
  background: var(--bg-secondary);
}

.footer-top {
  max-width: 1400px;
  margin: 0 auto 36px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-primary);
}

.footer-logo:hover .logo-icon {
  transform: rotate(180deg);
}

.footer-links {
  display: flex;
  gap: 40px;
}

.footer-links a {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-muted);
  transition: color 0.3s;
}

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

.footer-bottom {
  max-width: 1400px;
  margin: 0 auto;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-muted);
}

@media (max-width: 768px) {
  .footer { padding: 48px 24px; }
  .footer-top { flex-direction: column; gap: 24px; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
}

/* --- Back to Top --- */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 1px solid var(--border-light);
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all 0.3s var(--transition-smooth);
  color: var(--text-secondary);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 4px 16px rgba(0,0,0,0.1);
}

/* --- Project Modal --- */
.modal {
  position: fixed;
  inset: 0;
  z-index: 5000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.4s var(--transition-smooth), visibility 0.4s;
}

.modal.open {
  opacity: 1;
  visibility: visible;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(28, 27, 24, 0.92);
  backdrop-filter: blur(8px);
}

.modal-container {
  position: relative;
  width: 95vw;
  max-width: 1200px;
  max-height: 90vh;
  background: var(--bg-primary);
  border-radius: 4px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  z-index: 1;
  transform: translateY(20px);
  transition: transform 0.4s var(--transition-smooth);
}

.modal.open .modal-container {
  transform: translateY(0);
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 20px;
  z-index: 10;
  font-size: 2rem;
  color: var(--text-primary);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.3s;
}

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

.modal-header {
  padding: 40px 48px 24px;
  border-bottom: 1px solid var(--border);
}

.modal-cat {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
}

.modal-title {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 400;
  color: var(--text-primary);
  margin: 8px 0 4px;
}

.modal-location {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.modal-tabs {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--border);
  padding: 0 48px;
}

.modal-tab {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  padding: 16px 28px;
  color: var(--text-muted);
  position: relative;
  transition: color 0.3s;
  display: flex;
  align-items: center;
  gap: 10px;
}

.modal-tab::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transition: transform 0.3s var(--transition-smooth);
}

.modal-tab:hover {
  color: var(--text-primary);
}

.modal-tab.active {
  color: var(--accent);
}

.modal-tab.active::after {
  transform: scaleX(1);
}

.modal-tab:disabled {
  opacity: 0.3;
  pointer-events: none;
}

.tab-label {
  display: block;
}

.tab-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 22px;
  height: 22px;
  background: var(--bg-tertiary);
  border-radius: 12px;
  font-size: 0.65rem;
  padding: 0 6px;
  color: var(--text-muted);
  transition: all 0.3s;
}

.modal-tab.active .tab-count {
  background: var(--accent);
  color: #fff;
}

.modal-phase-desc {
  text-align: center;
  padding: 20px 48px 8px;
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-style: italic;
  transition: opacity 0.3s;
}

.modal-gallery {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 32px 48px;
}

.gallery-strip {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
}

.gallery-strip img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: 2px;
  cursor: pointer;
  transition: transform 0.3s, box-shadow 0.3s;
}

.gallery-strip img:hover {
  transform: scale(1.03);
  box-shadow: 0 8px 30px rgba(0,0,0,0.12);
}

.gallery-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 60px 0;
  color: var(--text-muted);
  font-style: italic;
}

/* --- Lightbox --- */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 6000;
  background: rgba(28, 27, 24, 0.96);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s;
}

.lightbox.open {
  opacity: 1;
  visibility: visible;
}

.lightbox img {
  max-width: 90vw;
  max-height: 85vh;
  object-fit: contain;
  border-radius: 2px;
}

.lightbox-close {
  position: absolute;
  top: 24px;
  right: 32px;
  font-size: 2.5rem;
  color: #fff;
  z-index: 10;
  transition: color 0.3s;
}

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

.lightbox-prev,
.lightbox-next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  font-size: 3rem;
  color: #fff;
  z-index: 10;
  padding: 20px;
  transition: color 0.3s;
}

.lightbox-prev { left: 16px; }
.lightbox-next { right: 16px; }

.lightbox-prev:hover,
.lightbox-next:hover {
  color: var(--accent);
}

/* --- Responsive --- */
@media (max-width: 768px) {
  section {
    padding: 100px 24px;
  }

  .section-header {
    margin-bottom: 48px;
  }

  .filter-bar {
    gap: 8px;
    margin-bottom: 40px;
  }

  .filter-btn {
    padding: 8px 16px;
    font-size: 0.65rem;
  }

  .about-stats-mini {
    gap: 32px;
  }

  .modal-header { padding: 32px 24px 20px; }
  .modal-tabs { padding: 0 24px; }
  .modal-tab { padding: 14px 20px; font-size: 0.65rem; }
  .modal-gallery { padding: 24px; }
  .gallery-strip { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 12px; }
}