/* ======================================
   КЛЮЧ ДОМОЙ — PREMIUM DARK DESIGN
   Строительство домов под ключ
   Республика Башкортостан
   ====================================== */

/* --- Art Direction ---
   DARK PREMIUM + CORPORATE
   Deep charcoal base, gold accents, ivory text.
   Luxury construction feel — trust, strength, prestige.
   ------------------------------------ */

:root {
  /* Type scale (fluid) */
  --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);

  /* 4px 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: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-interactive: 200ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 500ms cubic-bezier(0.16, 1, 0.3, 1);

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

  /* Fonts — Authoritative corporate + clean body */
  --font-display: 'DM Serif Display', 'Georgia', serif;
  --font-body: 'DM Sans', 'Inter', 'Helvetica Neue', sans-serif;
}

/* === DEFAULT: DARK PREMIUM === */
:root, [data-theme="dark"] {
  /* Surfaces — deep charcoal with warm undertone */
  --color-bg:             #0c0c0e;
  --color-surface:        #141416;
  --color-surface-2:      #1a1a1e;
  --color-surface-offset: #111113;
  --color-surface-3:      #222226;
  --color-border:         #2a2a2f;
  --color-divider:        #1e1e22;

  /* Text — ivory hierarchy */
  --color-text:           #f0ece4;
  --color-text-muted:     #8a867e;
  --color-text-faint:     #4e4c48;
  --color-text-inverse:   #0c0c0e;

  /* Primary — Muted gold (premium) */
  --color-primary:        #c9a84c;
  --color-primary-hover:  #b89638;
  --color-primary-active: #a68528;
  --color-primary-light:  rgba(201,168,76,0.08);

  /* Secondary */
  --color-secondary:      #f0ece4;
  --color-secondary-hover:#ffffff;

  /* Success */
  --color-success:        #5cb86c;
  --color-success-light:  rgba(92,184,108,0.1);

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.4);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.5);
  --shadow-xl: 0 24px 60px rgba(0,0,0,0.6);
  --shadow-glow: 0 0 40px rgba(201,168,76,0.06);
}

/* === LIGHT MODE === */
[data-theme="light"] {
  --color-bg:             #faf9f6;
  --color-surface:        #ffffff;
  --color-surface-2:      #f5f4f1;
  --color-surface-offset: #f0efec;
  --color-surface-3:      #eae9e5;
  --color-border:         #d8d6d0;
  --color-divider:        #e8e6e1;

  --color-text:           #1a1918;
  --color-text-muted:     #6b6960;
  --color-text-faint:     #a8a59e;
  --color-text-inverse:   #faf9f6;

  --color-primary:        #9e7c1a;
  --color-primary-hover:  #836510;
  --color-primary-active: #6b5208;
  --color-primary-light:  rgba(158,124,26,0.06);

  --color-secondary:      #1a1918;
  --color-secondary-hover:#000000;

  --color-success:        #2d7a3a;
  --color-success-light:  rgba(45,122,58,0.08);

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
  --shadow-xl: 0 24px 60px rgba(0,0,0,0.16);
  --shadow-glow: none;
}

/* ======== GLOBAL COMPONENTS ======== */

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

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

/* ---- Header / Nav ---- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(12,12,14,0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-divider);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
[data-theme="light"] .header {
  background: rgba(250,249,246,0.88);
}
.header--hidden { transform: translateY(-100%); }
.header--scrolled { box-shadow: var(--shadow-md); }

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

.header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
}
.header__logo svg { flex-shrink: 0; }
.header__logo-text {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 400;
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.nav { display: flex; align-items: center; gap: var(--space-6); }
.nav__link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  padding: var(--space-1) 0;
  letter-spacing: 0.01em;
  position: relative;
  transition: color var(--transition-interactive);
}
.nav__link:hover,
.nav__link--active { color: var(--color-text); }
.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 1px;
  background: var(--color-primary);
  transition: width var(--transition-interactive);
}
.nav__link:hover::after,
.nav__link--active::after { width: 100%; }

.header__phone {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-primary);
  text-decoration: none;
  white-space: nowrap;
  letter-spacing: 0.02em;
}
.header__phone:hover { color: var(--color-primary-hover); }

.header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.theme-toggle {
  width: 36px; height: 36px;
  display: flex; align-items: center; justify-content: center;
  color: var(--color-text-muted);
  border-radius: var(--radius-md);
  transition: all var(--transition-interactive);
}
.theme-toggle:hover { color: var(--color-text); background: var(--color-surface-2); }

/* Mobile menu */
.mobile-menu-btn {
  display: none;
  width: 44px; height: 44px;
  align-items: center; justify-content: center;
  color: var(--color-text);
}
.mobile-menu-btn span {
  display: block; width: 20px; height: 1.5px;
  background: currentColor;
  position: relative;
  transition: background var(--transition-interactive);
}
.mobile-menu-btn span::before,
.mobile-menu-btn span::after {
  content: ''; position: absolute;
  width: 100%; height: 1.5px;
  background: currentColor;
  left: 0;
  transition: transform var(--transition-interactive);
}
.mobile-menu-btn span::before { top: -6px; }
.mobile-menu-btn span::after { bottom: -6px; }
.mobile-menu-btn.active span { background: transparent; }
.mobile-menu-btn.active span::before { transform: translateY(6px) rotate(45deg); }
.mobile-menu-btn.active span::after { transform: translateY(-6px) rotate(-45deg); }

.mobile-nav {
  display: none;
  position: fixed;
  inset: 0;
  background: var(--color-bg);
  z-index: 99;
  padding: calc(var(--space-16) + var(--space-12)) var(--space-6) var(--space-8);
  flex-direction: column;
  gap: var(--space-1);
  overflow-y: auto;
}
.mobile-nav.active { display: flex; }
.mobile-nav__link {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-text);
  text-decoration: none;
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-divider);
  transition: color var(--transition-interactive);
}
.mobile-nav__link:hover { color: var(--color-primary); }
.mobile-nav__phone {
  margin-top: var(--space-8);
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--color-primary);
  text-decoration: none;
  letter-spacing: 0.03em;
}

@media (max-width: 900px) {
  .nav { display: none; }
  .header__phone { display: none; }
  .mobile-menu-btn { display: flex; }
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-sm);
  font-weight: 500;
  font-family: var(--font-body);
  border-radius: var(--radius-sm);
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: all var(--transition-interactive);
  white-space: nowrap;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}
.btn--primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}
.btn--primary:hover { background: var(--color-primary-hover); }
.btn--primary:active { background: var(--color-primary-active); transform: scale(0.98); }

.btn--secondary {
  background: var(--color-text);
  color: var(--color-bg);
}
.btn--secondary:hover { opacity: 0.9; }

.btn--outline {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}
.btn--outline:hover { border-color: var(--color-primary); color: var(--color-primary); }

.btn--ghost {
  background: transparent;
  color: var(--color-primary);
  padding: var(--space-2) 0;
  text-transform: none;
  letter-spacing: 0;
}
.btn--ghost:hover { color: var(--color-primary-hover); }
.btn--ghost::after {
  content: ' →';
  transition: transform var(--transition-interactive);
  display: inline-block;
}
.btn--ghost:hover::after { transform: translateX(4px); }

.btn--lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-sm);
  border-radius: var(--radius-md);
}

/* ---- Hero ---- */
.hero {
  position: relative;
  min-height: 90vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero__bg {
  position: absolute;
  inset: 0;
  background: var(--color-bg);
  z-index: 0;
}
.hero__bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 80%, rgba(201,168,76,0.04) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(201,168,76,0.03) 0%, transparent 50%);
}
.hero__bg::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-border), transparent);
}
.hero__content {
  position: relative;
  z-index: 2;
  max-width: 700px;
}
.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-4);
  background: var(--color-primary-light);
  border: 1px solid rgba(201,168,76,0.15);
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-primary);
  margin-bottom: var(--space-8);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.hero__title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 400;
  line-height: 1.1;
  margin-bottom: var(--space-5);
  color: var(--color-text);
  letter-spacing: -0.02em;
}
.hero__title span { color: var(--color-primary); }
.hero__subtitle {
  font-size: var(--text-base);
  line-height: 1.65;
  color: var(--color-text-muted);
  margin-bottom: var(--space-8);
  max-width: 520px;
}
.hero__actions {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}
.hero__stats {
  display: flex;
  gap: var(--space-10);
  margin-top: var(--space-12);
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-border);
}
.hero__stat-num {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 400;
  color: var(--color-text);
  letter-spacing: -0.02em;
}
.hero__stat-label {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-top: var(--space-1);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

@media (max-width: 768px) {
  .hero { min-height: 80vh; }
  .hero__stats { gap: var(--space-6); flex-wrap: wrap; }
}

/* ---- Section headers ---- */
.section-header {
  margin-bottom: var(--space-10);
}
.section-header--center { text-align: center; }
.section-header--center .section-header__desc { margin-inline: auto; }
.section-label {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  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);
  line-height: 1.15;
  letter-spacing: -0.01em;
}
.section-header__desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  margin-top: var(--space-3);
  max-width: 560px;
  line-height: 1.6;
}

/* ---- Cards ---- */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-interactive);
}
.card:hover {
  border-color: rgba(201,168,76,0.2);
  box-shadow: var(--shadow-glow);
}
.card__img {
  width: 100%;
  aspect-ratio: 16/10;
  object-fit: cover;
  background: var(--color-surface-2);
}
.card__body { padding: var(--space-5) var(--space-5) var(--space-3); }
.card__tag {
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-primary);
  margin-bottom: var(--space-2);
  letter-spacing: 0.03em;
  text-transform: uppercase;
}
.card__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 400;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}
.card__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.55;
}
.card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--color-divider);
}
.card__price {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 400;
  color: var(--color-text);
  letter-spacing: -0.01em;
}
.card__price span {
  font-size: var(--text-xs);
  font-weight: 400;
  color: var(--color-text-muted);
  font-family: var(--font-body);
}

/* ---- Grid layouts ---- */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-6); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-6); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-5); }

@media (max-width: 900px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* ---- Advantages ---- */
.advantage {
  padding: var(--space-6);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  transition: all var(--transition-interactive);
}
.advantage:hover {
  border-color: rgba(201,168,76,0.15);
  box-shadow: var(--shadow-glow);
}
.advantage__icon {
  width: 40px; height: 40px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: var(--space-4);
  color: var(--color-primary);
}
.advantage__title {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 600;
  margin-bottom: var(--space-2);
  color: var(--color-text);
}
.advantage__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.55;
}

/* ---- Testimonials ---- */
.testimonial {
  padding: var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}
.testimonial__stars {
  color: var(--color-primary);
  margin-bottom: var(--space-4);
  font-size: var(--text-sm);
  letter-spacing: 0.05em;
}
.testimonial__text {
  font-size: var(--text-sm);
  color: var(--color-text);
  line-height: 1.7;
  margin-bottom: var(--space-4);
}
.testimonial__author {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
}
.testimonial__location {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

/* ---- CTA Section ---- */
.cta-section {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-12) var(--space-8);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, rgba(201,168,76,0.03), transparent 60%);
}
.cta-section .section-title { position: relative; }
.cta-section .section-header__desc { color: var(--color-text-muted); margin-inline: auto; position: relative; }

/* ---- Quiz/Calculator ---- */
.quiz {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
}
.quiz__step { display: none; }
.quiz__step.active { display: block; }
.quiz__question {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 400;
  margin-bottom: var(--space-6);
  color: var(--color-text);
}
.quiz__options {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(180px, 100%), 1fr));
  gap: var(--space-3);
}
.quiz__option {
  padding: var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  text-align: center;
  font-size: var(--text-sm);
  font-weight: 500;
  transition: all var(--transition-interactive);
  background: var(--color-bg);
  color: var(--color-text-muted);
}
.quiz__option:hover { border-color: var(--color-primary); color: var(--color-text); }
.quiz__option.selected {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
  color: var(--color-primary);
}
.quiz__progress { display: flex; gap: var(--space-2); margin-bottom: var(--space-6); }
.quiz__progress-dot {
  width: 6px; height: 6px;
  border-radius: var(--radius-full);
  background: var(--color-border);
  transition: all var(--transition-interactive);
}
.quiz__progress-dot.active { background: var(--color-primary); width: 20px; }
.quiz__progress-dot.done { background: var(--color-primary); }
.quiz__nav { display: flex; justify-content: space-between; margin-top: var(--space-6); }

/* ---- Footer ---- */
.footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-12) var(--space-6);
}
.footer a { color: var(--color-text-muted); text-decoration: none; transition: color var(--transition-interactive); }
.footer a:hover { color: var(--color-primary); }
.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-8);
}
.footer__brand-desc {
  font-size: var(--text-sm);
  color: var(--color-text-faint);
  margin-top: var(--space-3);
  line-height: 1.6;
}
.footer__heading {
  font-weight: 600;
  font-size: var(--text-xs);
  color: var(--color-text);
  margin-bottom: var(--space-4);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.footer__list {
  list-style: none; padding: 0;
  display: flex; flex-direction: column;
  gap: var(--space-2);
}
.footer__list a { font-size: var(--text-sm); }
.footer__bottom {
  margin-top: var(--space-8);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-divider);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

@media (max-width: 768px) {
  .footer__grid { grid-template-columns: 1fr 1fr; gap: var(--space-6); }
  .footer__bottom { flex-direction: column; gap: var(--space-2); text-align: center; }
}
@media (max-width: 480px) {
  .footer__grid { grid-template-columns: 1fr; }
}

/* ---- Services grid ---- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
}
.service-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 1;
  cursor: pointer;
  transition: transform var(--transition-interactive);
  border: 1px solid var(--color-border);
}
.service-card:hover { transform: translateY(-3px); border-color: rgba(201,168,76,0.15); }
.service-card__bg { position: absolute; inset: 0; background: var(--color-surface-2); }
.service-card__content {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: var(--space-4);
  background: linear-gradient(transparent, rgba(0,0,0,0.7));
  color: #fff;
}
.service-card__title {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
}

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

/* ---- Mortgage ---- */
.mortgage-banner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
  align-items: center;
  padding: var(--space-8);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
}
.mortgage-banner__rate {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 400;
  color: var(--color-primary);
}
.mortgage-banner__list {
  list-style: none; padding: 0;
  display: flex; flex-direction: column;
  gap: var(--space-3);
}
.mortgage-banner__list li {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  line-height: 1.4;
}
.mortgage-banner__list li::before {
  content: '';
  width: 4px; height: 4px;
  background: var(--color-primary);
  border-radius: var(--radius-full);
  margin-top: 7px;
  flex-shrink: 0;
}
@media (max-width: 768px) { .mortgage-banner { grid-template-columns: 1fr; } }

/* ---- Page hero (inner pages) ---- */
.page-hero {
  padding: var(--space-16) 0 var(--space-12);
  border-bottom: 1px solid var(--color-border);
}
.page-hero__title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 400;
  margin-bottom: var(--space-3);
  letter-spacing: -0.02em;
}
.page-hero__breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-bottom: var(--space-4);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.page-hero__breadcrumb a {
  color: var(--color-text-faint);
  text-decoration: none;
}
.page-hero__breadcrumb a:hover { color: var(--color-primary); }

/* ---- Project detail ---- */
.project-specs {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: var(--space-4);
}
.project-spec {
  text-align: center;
  padding: var(--space-5);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}
.project-spec__value {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 400;
  color: var(--color-primary);
}
.project-spec__label {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-top: var(--space-1);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* ---- Blog ---- */
.blog-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-interactive);
}
.blog-card:hover { border-color: rgba(201,168,76,0.15); box-shadow: var(--shadow-glow); }
.blog-card__img { width: 100%; aspect-ratio: 16/9; object-fit: cover; background: var(--color-surface-2); }
.blog-card__body { padding: var(--space-5); }
.blog-card__date { font-size: var(--text-xs); color: var(--color-text-faint); margin-bottom: var(--space-2); text-transform: uppercase; letter-spacing: 0.04em; }
.blog-card__title { font-family: var(--font-display); font-size: var(--text-base); font-weight: 400; margin-bottom: var(--space-2); }
.blog-card__title a { color: var(--color-text); text-decoration: none; }
.blog-card__title a:hover { color: var(--color-primary); }
.blog-card__excerpt { font-size: var(--text-sm); color: var(--color-text-muted); line-height: 1.55; }

/* ---- Article ---- */
.article { max-width: 72ch; margin-inline: auto; }
.article h2 { font-family: var(--font-display); font-size: var(--text-lg); font-weight: 400; margin-top: var(--space-8); margin-bottom: var(--space-4); }
.article h3 { font-size: var(--text-base); font-weight: 600; margin-top: var(--space-6); margin-bottom: var(--space-3); }
.article p { margin-bottom: var(--space-4); line-height: 1.7; color: var(--color-text-muted); }
.article ul, .article ol { margin-bottom: var(--space-4); padding-left: var(--space-6); }
.article li { margin-bottom: var(--space-2); line-height: 1.6; color: var(--color-text-muted); }

/* ---- Contact form ---- */
.form-group { margin-bottom: var(--space-5); }
.form-group label { display: block; font-size: var(--text-xs); font-weight: 500; margin-bottom: var(--space-2); color: var(--color-text-muted); text-transform: uppercase; letter-spacing: 0.06em; }
.form-input {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  color: var(--color-text);
  font-size: var(--text-base);
  transition: border-color var(--transition-interactive);
}
.form-input:focus {
  border-color: var(--color-primary);
  outline: none;
  box-shadow: 0 0 0 3px rgba(201,168,76,0.1);
}
textarea.form-input { min-height: 120px; resize: vertical; }

/* ---- Animations ---- */
.fade-in {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---- Divider line ---- */
.divider {
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-border), transparent);
}

/* ---- Utility ---- */
.text-center { text-align: center; }
.text-primary { color: var(--color-primary); }
.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }

/* === PROJECT GALLERY === */
.project-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(300px, 100%), 1fr));
  gap: var(--space-4);
  margin-top: var(--space-6);
}
.project-gallery__item {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  cursor: pointer;
  aspect-ratio: 4/3;
}
.project-gallery__item--plan {
  aspect-ratio: auto;
}
.project-gallery__item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform var(--transition-slow);
}
.project-gallery__item--plan img {
  object-fit: contain;
  background: var(--color-surface-2);
}
.project-gallery__item:hover img {
  transform: scale(1.03);
}
.project-gallery__caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--space-3) var(--space-4);
  background: linear-gradient(transparent, oklch(0 0 0 / 0.65));
  color: #fff;
  font-size: var(--text-sm);
  font-weight: 500;
}

/* Lightbox */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: oklch(0 0 0 / 0.9);
  align-items: center;
  justify-content: center;
  padding: var(--space-6);
}
.lightbox.active {
  display: flex;
}
.lightbox img {
  max-width: 90vw;
  max-height: 85vh;
  object-fit: contain;
  border-radius: var(--radius-lg);
}
.lightbox__close {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  background: oklch(1 0 0 / 0.15);
  color: #fff;
  font-size: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border: none;
  transition: background var(--transition-interactive);
}
.lightbox__close:hover {
  background: oklch(1 0 0 / 0.3);
}
.lightbox__nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background: oklch(1 0 0 / 0.15);
  color: #fff;
  font-size: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border: none;
  transition: background var(--transition-interactive);
}
.lightbox__nav:hover {
  background: oklch(1 0 0 / 0.3);
}
.lightbox__nav--prev { left: var(--space-4); }
.lightbox__nav--next { right: var(--space-4); }

/* === LEAD FORM MODAL === */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 10000;
  background: oklch(0 0 0 / 0.7);
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  backdrop-filter: blur(4px);
}
.modal-overlay.active {
  display: flex;
}
.modal {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
  max-width: 480px;
  width: 100%;
  position: relative;
  animation: modalIn 300ms cubic-bezier(0.16, 1, 0.3, 1);
}
@keyframes modalIn {
  from { opacity: 0; transform: translateY(16px) scale(0.97); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}
.modal__close {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: var(--color-surface-2);
  color: var(--color-text-muted);
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border: none;
  transition: background var(--transition-interactive);
}
.modal__close:hover {
  background: var(--color-surface-3);
  color: var(--color-text);
}
.modal__title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  margin-bottom: var(--space-2);
}
.modal__desc {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  margin-bottom: var(--space-6);
}
.modal .form-group { margin-bottom: var(--space-4); }
.modal .form-status {
  text-align: center;
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  margin-top: var(--space-4);
  font-size: var(--text-sm);
  display: none;
}
.modal .form-status--success {
  display: block;
  background: oklch(0.45 0.15 145 / 0.15);
  color: oklch(0.75 0.15 145);
}
.modal .form-status--error {
  display: block;
  background: oklch(0.5 0.2 25 / 0.15);
  color: oklch(0.75 0.2 25);
}