/* ============================================================
   Sowmya Aluminium Concepts — Static Site Styles
   ============================================================ */

/* ─── Google Fonts are loaded via <link> in HTML ─────────── */

/* ─── Variables ────────────────────────────────────────────── */
:root {
  --base:        #FAF9F6;
  --base-warm:   #F5F3EF;
  --surface:     #F0EDE8;
  --charcoal:    #1C1C1E;
  --charcoal-lt: #2D2D30;
  --accent:      #C8A85C;
  --accent-dk:   #B08C3E;
  --text-1:      #1C1C1E;
  --text-2:      #5C5C60;
  --text-3:      #8E8E93;
  --text-inv:    #FAF9F6;
  --border:      #E5E5E7;
  --border-dk:   #D1D1D6;
  --whatsapp:    #25D366;
  --radius-sm:   0.5rem;
  --radius-md:   0.75rem;
  --radius-lg:   1rem;
  --radius-xl:   1.5rem;
  --radius-2xl:  2rem;
  --radius-full: 9999px;
  --ease:        cubic-bezier(0.22, 1, 0.36, 1);
  --ease-expo:   cubic-bezier(0.16, 1, 0.3, 1);
}

/* ─── Reset ─────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body { overflow-x: hidden; }
* { min-width: 0; }
body {
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-1);
  background: var(--base);
  overflow-x: hidden;
}
img { display: block; max-width: 100%; }
a { text-decoration: none; color: inherit; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
ul, ol { list-style: none; }

/* ─── Typography ────────────────────────────────────────────── */
h1, h2, h3, h4 {
  font-family: 'Outfit', system-ui, sans-serif;
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.1;
  color: var(--text-1);
}
h1 { font-size: clamp(2.5rem, 5vw, 4.5rem); }
h2 { font-size: clamp(2rem, 4vw, 3.25rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: clamp(1.1rem, 2vw, 1.4rem); }
p  { color: var(--text-2); line-height: 1.75; }

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

/* ─── Layout helpers ────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: 1400px;
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 4vw, 3rem);
}
.section { padding-block: clamp(4rem, 8vw, 7rem); }
.section-sm { padding-block: clamp(2rem, 4vw, 3.5rem); }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }

/* ─── Scrollbar ─────────────────────────────────────────────── */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #D4D4D8; border-radius: 99px; }

/* ─── Utilities ─────────────────────────────────────────────── */
.text-accent   { color: var(--accent); }
.text-white    { color: #fff; }
.text-muted    { color: var(--text-3); }
.text-center   { text-align: center; }
.overline {
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--accent);
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.25rem;
}
.overline::before {
  content: '';
  display: block;
  width: 2.5rem;
  height: 1px;
  background: var(--accent);
  flex-shrink: 0;
}
.overline.center { justify-content: center; }
.overline.center::before { display: none; }

/* section heading block */
.section-heading { margin-bottom: 3.5rem; }
.section-heading.center { text-align: center; }
.section-heading h2 { margin-bottom: 1rem; }
.section-heading p  { max-width: 52ch; color: var(--text-2); font-size: 1.1rem; }
.section-heading.center p { margin-inline: auto; }

/* ─── Buttons ───────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 2rem;
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  transition: all 0.3s var(--ease);
  cursor: pointer;
}
.btn-dark {
  background: var(--charcoal);
  color: #fff;
}
.btn-dark:hover { background: var(--accent); }
.btn-white {
  background: #fff;
  color: var(--charcoal);
}
.btn-white:hover { background: var(--accent); color: #fff; }
.btn-outline {
  border: 1.5px solid rgba(255,255,255,0.3);
  color: #fff;
}
.btn-outline:hover { background: rgba(255,255,255,0.1); }
.btn svg { width: 1rem; height: 1rem; transition: transform 0.3s var(--ease); }
.btn:hover svg { transform: translateX(3px); }

/* ─── Glass ─────────────────────────────────────────────────── */
.glass {
  background: rgba(250,249,246,0.85);
  backdrop-filter: blur(24px);
  border: 1px solid rgba(255,255,255,0.25);
}

/* ─── NAVBAR ────────────────────────────────────────────────── */
@keyframes pulse { 0%,100% { opacity:1; } 50% { opacity:.4; } }

header {
  position: fixed;
  left: 0; right: 0;
  top: 0;
  z-index: 99;
  transition: all 0.4s var(--ease);
}
header.scrolled {
  top: 0;
  background: rgba(250,249,246,0.9);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 8px rgba(0,0,0,0.04);
}
nav {
  max-width: 1400px;
  margin-inline: auto;
  padding-inline: clamp(1rem,4vw,3rem);
  height: 4.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo { font-family: 'Outfit', sans-serif; font-size: 1.25rem; }
.logo strong { font-weight: 700; }
.logo span { font-weight: 300; color: var(--text-3); }
header.light .logo strong,
header.light .nav-links a { color: #fff; }
header.light .logo span { color: rgba(255,255,255,0.6); }
header.light .nav-links a { color: rgba(255,255,255,0.8); }
header.light .nav-links a:hover { color: #fff; }
header.light .btn-dark { background: #fff; color: var(--charcoal); }

.nav-links { display: flex; align-items: center; gap: 0.25rem; }
.nav-links a {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-2);
  border-radius: var(--radius-sm);
  transition: color 0.2s;
  position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0.25rem; left: 1rem; right: 1rem;
  height: 1.5px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s var(--ease);
}
.nav-links a:hover, .nav-links a.active { color: var(--text-1); }
.nav-links a:hover::after, .nav-links a.active::after { transform: scaleX(1); }

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 2.5rem;
  height: 2.5rem;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  background: transparent;
  transition: background 0.2s;
}
.hamburger span {
  display: block;
  width: 1.25rem;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: all 0.3s var(--ease);
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile menu */
.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 98;
  background: rgba(250,249,246,0.97);
  backdrop-filter: blur(20px);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.25rem;
  padding-top: 3rem;
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  font-family: 'Outfit', sans-serif;
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--text-2);
  padding: 0.35rem 2rem;
  transition: color 0.2s;
}
.mobile-menu a:hover, .mobile-menu a.active { color: var(--text-1); }
.mobile-menu .menu-cta { margin-top: 1.25rem; }
.mobile-menu-bottom {
  position: absolute;
  bottom: 3rem;
  text-align: center;
}
.mobile-menu-bottom p { font-size: 0.875rem; color: var(--text-3); }

/* ─── HERO ───────────────────────────────────────────────────── */
#hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--charcoal);
  padding-top: 7rem;
  padding-bottom: 5rem;
}
.hero-slides { position: absolute; inset: 0; z-index: 0; }
.hero-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 1.2s var(--ease);
}
.hero-slide.active { opacity: 1; }
.hero-slide img { width: 100%; height: 100%; object-fit: cover; }
.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(to right, rgba(0,0,0,0.85) 0%, rgba(0,0,0,0.4) 60%, transparent 100%),
    linear-gradient(to top, var(--charcoal) 0%, transparent 40%);
}
.hero-content {
  position: relative;
  z-index: 2;
  color: #fff;
  max-width: 800px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1.25rem;
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius-full);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  background: rgba(255,255,255,0.05);
  backdrop-filter: blur(8px);
  margin-bottom: 2rem;
}
.hero-h1 {
  font-size: clamp(3.5rem, 9vw, 8rem);
  font-weight: 700;
  line-height: 0.95;
  letter-spacing: -0.04em;
  margin-bottom: 1.5rem;
  color: #fff;
}
.hero-h1 em {
  font-style: italic;
  font-weight: 300;
  color: rgba(255,255,255,0.7);
  display: block;
}
.hero-p {
  font-size: clamp(1rem, 1.5vw, 1.2rem);
  color: rgba(255,255,255,0.75);
  max-width: 44ch;
  margin-bottom: 2.5rem;
  line-height: 1.7;
}
.hero-btns { display: flex; gap: 1rem; flex-wrap: wrap; }

.hero-stats {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  z-index: 2;
  background: rgba(0,0,0,0.35);
  backdrop-filter: blur(12px);
  border-top: 1px solid rgba(255,255,255,0.1);
  display: none;
}
.hero-stats .container {
  display: flex;
  align-items: center;
  gap: 3rem;
  padding-block: 1.5rem;
}
.stat-item { display: flex; flex-direction: column; }
.stat-value {
  font-family: 'Outfit', sans-serif;
  font-size: 1.75rem;
  font-weight: 700;
  color: #fff;
}
.stat-label {
  font-size: 0.625rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: rgba(255,255,255,0.45);
  margin-top: 0.15rem;
}
.stat-sep { width: 1px; height: 2.5rem; background: rgba(255,255,255,0.1); flex-shrink: 0; }

/* ─── MARQUEE ────────────────────────────────────────────────── */
#marquee {
  background: var(--charcoal);
  padding-block: 1.25rem;
  overflow: hidden;
  border-top: 1px solid rgba(255,255,255,0.06);
}
.marquee-track {
  display: flex;
  animation: marquee 30s linear infinite;
  white-space: nowrap;
}
.marquee-track:hover { animation-play-state: paused; }
.marquee-item {
  flex-shrink: 0;
  padding-inline: 2.5rem;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: rgba(255,255,255,0.4);
  display: flex;
  align-items: center;
  gap: 2rem;
}
.marquee-item::after {
  content: '·';
  color: var(--accent);
  font-size: 1.5rem;
}
@keyframes marquee { from { transform:translateX(0); } to { transform:translateX(-50%); } }

/* ─── SECTION: Exterior / Interior (split layout) ───────────── */
.solutions-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 4vw, 5rem);
  align-items: center;
}
.solutions-section.reverse { direction: rtl; }
.solutions-section.reverse > * { direction: ltr; }
.solutions-img {
  position: relative;
  border-radius: var(--radius-2xl);
  overflow: hidden;
  aspect-ratio: 4/5;
}
.solutions-img img { width: 100%; height: 100%; object-fit: cover; }
.solutions-img-tag {
  position: absolute;
  bottom: 1.5rem; left: 1.5rem;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(8px);
  padding: 0.6rem 1.25rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--charcoal);
}
.solutions-list { margin-top: 1.5rem; display: flex; flex-direction: column; gap: 1rem; }
.solutions-list-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}
.solutions-list-item:last-child { border-bottom: none; }
.sol-num {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  background: var(--surface);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  font-size: 0.875rem;
  color: var(--charcoal);
  flex-shrink: 0;
}
.solutions-list-item h4 { font-size: 1rem; margin: 0; }

/* ─── WHY ALUMINIUM ─────────────────────────────────────────── */
#why { background: var(--charcoal); color: #fff; }
#why h2, #why h3 { color: #fff; }
#why p { color: rgba(255,255,255,0.6); }
.why-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(2rem, 5vw, 6rem); align-items: start; }
.why-img {
  border-radius: var(--radius-2xl);
  overflow: hidden;
  aspect-ratio: 4/5;
  position: relative;
  margin-top: 2rem;
}
.why-img img { width: 100%; height: 100%; object-fit: cover; }
.why-img-caption {
  position: absolute;
  bottom: 1.5rem; left: 1.5rem; right: 1.5rem;
  background: rgba(28,28,30,0.75);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
}
.why-img-caption h4 { font-size: 1rem; margin-bottom: 0.25rem; color: #fff; }
.why-img-caption p  { font-size: 0.8rem; color: rgba(255,255,255,0.6); margin: 0; }
.benefits-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 2.5rem; }
.benefit {  }
.benefit-icon {
  width: 3rem;
  height: 3rem;
  border-radius: 0.75rem;
  border: 1px solid rgba(255,255,255,0.1);
  background: rgba(255,255,255,0.05);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
}
.benefit-icon svg { width: 1.25rem; height: 1.25rem; color: var(--accent); stroke: currentColor; fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.benefit h3 { font-size: 1.1rem; margin-bottom: 0.5rem; }
.benefit p  { font-size: 0.875rem; }
.why-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-top: 3rem;
  padding-top: 2.5rem;
  border-top: 1px solid rgba(255,255,255,0.08);
}
.why-stat-val {
  font-family: 'Outfit', sans-serif;
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 700;
  color: #fff;
}
.why-stat-lbl {
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: rgba(255,255,255,0.35);
  margin-top: 0.25rem;
}

/* ─── PROJECTS ──────────────────────────────────────────────── */
#projects { background: var(--surface); }
.project-filters {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}
.filter-btn {
  padding: 0.5rem 1.25rem;
  border-radius: var(--radius-lg);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-2);
  background: transparent;
  transition: all 0.3s;
  border: 1px solid transparent;
}
.filter-btn:hover { background: var(--border); color: var(--text-1); }
.filter-btn.active { background: var(--charcoal); color: #fff; }
.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.project-card {
  border-radius: var(--radius-2xl);
  overflow: hidden;
  isolation: isolate;
  aspect-ratio: 4/5;
  position: relative;
  background: var(--border);
}
.project-card img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.1s linear; }
.project-card:hover img { transform: scale(1.1) !important; }
.project-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.8) 0%, transparent 50%);
  opacity: 0;
  transition: opacity 0.4s;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}
.project-card:hover .project-overlay { opacity: 1; }
.project-overlay span { font-size: 0.65rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.15em; color: var(--accent); margin-bottom: 0.25rem; }
.project-overlay h4 { color: #fff; font-size: 1.1rem; margin: 0 0 0.25rem; }
.project-overlay p  { color: rgba(255,255,255,0.6); font-size: 0.8rem; margin: 0; }

/* ─── BEFORE/AFTER ──────────────────────────────────────────── */
#before-after { background: var(--charcoal); }
#before-after h2, #before-after h3 { color: #fff; }
#before-after .overline { color: var(--accent); }
.ba-tabs { display: flex; gap: 0.75rem; margin-bottom: 2rem; }
.ba-tab {
  padding: 0.5rem 1.25rem;
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  font-weight: 600;
  color: rgba(255,255,255,0.5);
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  cursor: pointer;
  transition: all 0.3s;
}
.ba-tab.active { background: #fff; color: var(--charcoal); }
.ba-container {
  position: relative;
  border-radius: var(--radius-2xl);
  overflow: hidden;
  user-select: none;
  cursor: ew-resize;
  aspect-ratio: 16/9;
}
.ba-img { position: absolute; inset: 0; }
.ba-img img { width: 100%; height: 100%; object-fit: cover; }
.ba-img.after { clip-path: inset(0 50% 0 0); }
.ba-divider {
  position: absolute;
  top: 0; bottom: 0;
  left: 50%;
  width: 3px;
  background: #fff;
  transform: translateX(-50%);
  z-index: 10;
  box-shadow: 0 0 12px rgba(0,0,0,0.4);
}
.ba-handle {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 3rem;
  height: 3rem;
  background: #fff;
  border-radius: 50%;
  box-shadow: 0 4px 20px rgba(0,0,0,0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 11;
}
.ba-handle svg { width: 1.25rem; height: 1.25rem; color: var(--charcoal); }
.ba-label {
  position: absolute;
  top: 1rem;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: #fff;
  background: rgba(0,0,0,0.4);
  backdrop-filter: blur(4px);
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-full);
}
.ba-label.before { left: 1rem; }
.ba-label.after  { right: 1rem; }
.ba-meta { margin-top: 1.5rem; }
.ba-meta h3 { color: #fff; font-size: 1.25rem; margin-bottom: 0.25rem; }
.ba-meta p  { color: rgba(255,255,255,0.5); font-size: 0.875rem; }

/* ─── PROCESS ────────────────────────────────────────────────── */
#process { background: var(--base-warm); }
.process-layout { display: grid; grid-template-columns: 1fr 2fr; gap: clamp(2rem, 5vw, 6rem); align-items: start; }
.process-heading-sticky { position: sticky; top: 8rem; }
.process-steps { display: flex; flex-direction: column; gap: 1.5rem; position: relative; }
.process-steps::before {
  content: '';
  position: absolute;
  left: 1.5rem; top: 0; bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, var(--accent), var(--border-dk), transparent);
}
.process-step {
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
}
.step-node {
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  background: #fff;
  border: 2px solid var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  color: var(--accent);
  flex-shrink: 0;
  position: relative;
  z-index: 1;
  transition: transform 0.3s;
}
.process-step:hover .step-node { transform: scale(1.1); }
.step-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 1.5rem 2rem;
  flex: 1;
  transition: box-shadow 0.3s;
}
.process-step:hover .step-card { box-shadow: 0 8px 24px rgba(0,0,0,0.06); }
.step-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 0.75rem; }
.step-icon-wrap {
  display: flex;
  align-items: center;
  gap: 1rem;
}
.step-icon {
  padding: 0.6rem;
  background: var(--surface);
  border-radius: 0.75rem;
  transition: background 0.3s, color 0.3s;
}
.step-icon svg { width: 1.5rem; height: 1.5rem; stroke: var(--charcoal); fill: none; stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; }
.process-step:hover .step-icon { background: var(--charcoal); }
.process-step:hover .step-icon svg { stroke: #fff; }
.step-tag {
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-3);
  background: var(--surface);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
}
.step-card h3 { font-size: 1.25rem; margin: 0 0 0.5rem; }
.step-card p  { font-size: 0.9375rem; color: var(--text-2); margin: 0; }

/* ─── TESTIMONIALS ───────────────────────────────────────────── */
#testimonials { background: var(--surface); overflow: hidden; }
.testimonials-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 2rem;
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
}
.slider-controls { display: flex; gap: 0.75rem; }
.slider-btn {
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  border: 1px solid var(--border-dk);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s;
  color: var(--text-2);
}
.slider-btn:hover, .slider-btn.active-btn {
  background: var(--charcoal);
  color: #fff;
  border-color: var(--charcoal);
}
.slider-btn:disabled { opacity: 0.3; cursor: not-allowed; }
.slider-btn svg { width: 1.25rem; height: 1.25rem; stroke: currentColor; fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.testimonials-track {
  display: flex;
  gap: 1.5rem;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scrollbar-width: none;
  padding-bottom: 1rem;
}
.testimonials-track::-webkit-scrollbar { display: none; }
.testimonial-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-2xl);
  padding: 2rem;
  flex: 0 0 calc(33.333% - 1rem);
  scroll-snap-align: start;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  transition: box-shadow 0.4s, transform 0.4s;
}
.testimonial-card:hover { box-shadow: 0 12px 40px rgba(0,0,0,0.08); transform: translateY(-4px); }
.t-quote-icon {
  position: absolute;
  top: 1.25rem; right: 1.25rem;
  color: var(--surface);
  transition: color 0.4s;
}
.testimonial-card:hover .t-quote-icon { color: var(--border-dk); }
.t-stars { display: flex; gap: 0.2rem; margin-bottom: 1.25rem; }
.t-stars svg { width: 1rem; height: 1rem; fill: var(--accent); stroke: none; }
.t-quote { font-family: 'Outfit', sans-serif; font-weight: 300; font-size: 1rem; line-height: 1.7; color: var(--text-1); margin-bottom: 1.5rem; }
.t-author { display: flex; align-items: center; gap: 1rem; padding-top: 1.25rem; border-top: 1px solid var(--border); }
.t-avatar {
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  background: var(--charcoal);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  font-size: 1.125rem;
  flex-shrink: 0;
}
.t-name { font-weight: 700; font-size: 0.9375rem; color: var(--text-1); margin-bottom: 0.125rem; }
.t-loc  { font-size: 0.75rem; color: var(--text-3); }

/* ─── FAQ ────────────────────────────────────────────────────── */
#faq { background: #fff; }
.faq-layout { display: grid; grid-template-columns: 1fr 2fr; gap: clamp(2rem,5vw,6rem); align-items: start; }
.faq-sticky { position: sticky; top: 8rem; }
.faq-list { border-top: 1px solid var(--border); }
.faq-item { border-bottom: 1px solid var(--border); }
.faq-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.75rem 0;
  text-align: left;
  transition: color 0.3s;
}
.faq-btn:hover { color: var(--accent); }
.faq-question { font-family: 'Outfit', sans-serif; font-size: clamp(1rem, 2vw, 1.25rem); font-weight: 500; padding-right: 2rem; }
.faq-icon {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  border: 1px solid var(--border-dk);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all 0.4s var(--ease);
}
.faq-icon svg { width: 1.25rem; height: 1.25rem; stroke: currentColor; fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; transition: transform 0.4s var(--ease); }
.faq-btn.open .faq-icon { background: var(--charcoal); border-color: var(--charcoal); color: #fff; }
.faq-btn.open .faq-icon svg { transform: rotate(180deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s var(--ease);
}
.faq-answer-inner { padding-bottom: 2rem; padding-right: 4rem; }
.faq-answer-inner p { font-size: 1rem; line-height: 1.75; }

/* ─── CONTACT ────────────────────────────────────────────────── */
#contact { background: #fff; }
.contact-layout { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(2rem,5vw,6rem); align-items: start; }
.contact-info { margin-top: 3rem; display: flex; flex-direction: column; gap: 2rem; }
.contact-info-item { display: flex; gap: 1.5rem; align-items: flex-start; }
.contact-icon {
  width: 3.5rem; height: 3.5rem;
  border-radius: 50%;
  background: var(--surface);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background 0.3s, color 0.3s;
}
.contact-info-item:hover .contact-icon { background: var(--charcoal); color: #fff; }
.contact-icon svg { width: 1.25rem; height: 1.25rem; stroke: currentColor; fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.contact-info-item h4 { font-size: 1.1rem; margin-bottom: 0.25rem; }
.contact-info-item a { color: var(--text-2); transition: color 0.2s; }
.contact-info-item a:hover { color: var(--accent); }
.contact-form-wrap {
  background: var(--surface);
  border-radius: var(--radius-2xl);
  padding: clamp(2rem, 4vw, 3rem);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; }
.form-field { display: flex; flex-direction: column; gap: 0.5rem; }
.form-label {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-2);
}
.form-input, .form-textarea, .form-select {
  width: 100%;
  padding: 0.875rem 1.25rem;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  background: #fff;
  font-family: 'Inter', sans-serif;
  font-size: 0.9375rem;
  color: var(--text-1);
  transition: border-color 0.2s, box-shadow 0.2s;
}
.form-input::placeholder, .form-textarea::placeholder { color: var(--text-3); }
.form-input:focus, .form-textarea:focus, .form-select:focus {
  outline: none;
  border-color: var(--charcoal);
  box-shadow: 0 0 0 3px rgba(28,28,30,0.08);
}
.form-textarea { resize: none; }
.form-gap { display: flex; flex-direction: column; gap: 1.25rem; }
.form-success {
  min-height: 300px;
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 1rem;
}
.form-success.show { display: flex; }
.success-icon {
  width: 5rem; height: 5rem;
  border-radius: 50%;
  background: #dcfce7;
  color: #16a34a;
  display: flex;
  align-items: center;
  justify-content: center;
}
.success-icon svg { width: 2rem; height: 2rem; stroke: currentColor; fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }

/* ─── CTA BANNER ─────────────────────────────────────────────── */
#cta-banner { background: var(--charcoal); }
.cta-inner {
  text-align: center;
  max-width: 700px;
  margin-inline: auto;
}
.cta-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #fff;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius-full);
  padding: 0.4rem 1rem;
  margin-bottom: 2rem;
}
.cta-badge .dot { width: 0.5rem; height: 0.5rem; background: #22c55e; border-radius: 50%; animation: pulse 2s infinite; }
#cta-banner h2 { color: #fff; font-size: clamp(2rem, 5vw, 4rem); margin-bottom: 1rem; }
#cta-banner p  { color: rgba(255,255,255,0.6); font-size: 1.1rem; margin-bottom: 2.5rem; }
.cta-btns { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* ─── PRE-FOOTER ─────────────────────────────────────────────── */
#pre-footer { background: var(--charcoal); border-top: 1px solid rgba(255,255,255,0.08); }
#pre-footer .container { display: flex; align-items: center; justify-content: space-between; gap: 2rem; flex-wrap: wrap; }
#pre-footer h3 { color: #fff; font-size: clamp(1.25rem, 3vw, 1.75rem); }
#pre-footer p  { color: rgba(255,255,255,0.5); font-size: 0.9375rem; margin-top: 0.25rem; }

/* ─── FOOTER ─────────────────────────────────────────────────── */
footer { background: var(--base); border-top: 1px solid var(--border); }
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 3rem;
  padding-block: 4rem;
}
.footer-brand { }
.footer-logo { font-family: 'Outfit', sans-serif; font-size: 1.25rem; display: inline-flex; gap: 0.2rem; margin-bottom: 1rem; }
.footer-logo strong { font-weight: 700; }
.footer-logo span   { font-weight: 300; color: var(--text-3); }
.footer-brand p     { font-size: 0.875rem; color: var(--text-2); line-height: 1.7; max-width: 30ch; margin-bottom: 1.25rem; }
.footer-socials { display: flex; gap: 0.75rem; }
.social-btn {
  width: 2.5rem; height: 2.5rem;
  border: 1px solid var(--border);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: var(--text-3);
  transition: all 0.3s;
}
.social-btn:hover { background: var(--charcoal); color: #fff; border-color: var(--charcoal); }
.social-btn svg { width: 1rem; height: 1rem; stroke: currentColor; fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.footer-col h4 {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-1);
  margin-bottom: 1.25rem;
}
.footer-col ul { display: flex; flex-direction: column; gap: 0.75rem; }
.footer-col a, .footer-col li { font-size: 0.875rem; color: var(--text-2); transition: color 0.2s; }
.footer-col a:hover { color: var(--text-1); }
.footer-contact-item { display: flex; gap: 0.75rem; align-items: flex-start; }
.footer-contact-item svg { width: 1rem; height: 1rem; stroke: var(--text-3); fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; flex-shrink: 0; margin-top: 0.1rem; }
.footer-bottom {
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding-block: 1.5rem;
  font-size: 0.75rem;
  color: var(--text-3);
}
.footer-bottom a { color: var(--text-3); transition: color 0.2s; }
.footer-bottom a:hover { color: var(--text-1); }
.footer-bottom-links { display: flex; gap: 1.5rem; }

/* ─── DOOR INTRO ANIMATION ───────────────────────────────────── */
@keyframes floaty { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-10px)} }

#intro-wrap {
  position: fixed;
  inset: 0;
  z-index: 9000;
  overflow: hidden;
  cursor: pointer;
  touch-action: pan-y;
}
#intro-wrap.done { visibility: hidden; }

.door {
  position: absolute;
  top: 0; bottom: 0;
  width: 50%;
  overflow: hidden;
  will-change: transform;
  background:
    linear-gradient(180deg, rgba(255,255,255,0.12) 0%, rgba(255,255,255,0) 24%, rgba(0,0,0,0.045) 78%, rgba(0,0,0,0.11) 100%),
    linear-gradient(180deg, #c8b9a6 0%, #b9a995 52%, #ae9d88 100%);
}
.door-left {
  left: 0;
  background:
    linear-gradient(90deg, rgba(0,0,0,0.12), rgba(0,0,0,0) 14%, rgba(255,255,255,0.10) 50%, rgba(0,0,0,0.05) 86%, rgba(0,0,0,0.18)),
    linear-gradient(180deg, rgba(255,255,255,0.12) 0%, rgba(255,255,255,0) 24%, rgba(0,0,0,0.045) 78%, rgba(0,0,0,0.11) 100%),
    linear-gradient(180deg, #c8b9a6 0%, #b9a995 52%, #ae9d88 100%);
  box-shadow: inset -1px 0 0 rgba(0,0,0,0.28);
}
.door-right {
  right: 0;
  background:
    linear-gradient(90deg, rgba(0,0,0,0.18), rgba(0,0,0,0.05) 14%, rgba(255,255,255,0.10) 50%, rgba(0,0,0,0) 86%, rgba(0,0,0,0.12)),
    linear-gradient(180deg, rgba(255,255,255,0.12) 0%, rgba(255,255,255,0) 24%, rgba(0,0,0,0.045) 78%, rgba(0,0,0,0.11) 100%),
    linear-gradient(180deg, #c8b9a6 0%, #b9a995 52%, #ae9d88 100%);
  box-shadow: inset 1px 0 0 rgba(0,0,0,0.28);
}
.door-panel-outer {
  position: absolute;
  inset: 26px;
  border-radius: 4px;
  box-shadow: inset 0 2px 6px rgba(0,0,0,0.18), inset 0 -1px 3px rgba(255,255,255,0.22), inset 0 0 0 1px rgba(0,0,0,0.05);
}
.door-panel-inner {
  position: absolute;
  inset: 40px;
  border-radius: 3px;
  background: linear-gradient(180deg, rgba(255,255,255,0.11) 0%, rgba(255,255,255,0) 32%, rgba(0,0,0,0.05) 100%);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.34), inset 0 0 26px rgba(0,0,0,0.05), 0 1px 0 rgba(0,0,0,0.06);
  border: 1px solid rgba(176,106,53,0.16);
}
.door-handle-left {
  position: absolute; top: 72%; right: 24px; transform: translateY(-50%);
  width: 9px; height: 118px; border-radius: 6px;
  background: linear-gradient(180deg,#eccfa6,#b87a45 48%,#8a5226);
  box-shadow: 0 3px 9px rgba(60,35,12,0.38), inset 0 1px 0 rgba(255,255,255,0.6);
}
.door-handle-right {
  position: absolute; top: 72%; left: 24px; transform: translateY(-50%);
  width: 9px; height: 118px; border-radius: 6px;
  background: linear-gradient(180deg,#eccfa6,#b87a45 48%,#8a5226);
  box-shadow: 0 3px 9px rgba(60,35,12,0.38), inset 0 1px 0 rgba(255,255,255,0.6);
}

#intro-brand {
  position: absolute;
  top: 44%; left: 0; right: 0;
  transform: translateY(-50%);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: clamp(10px,3vw,26px);
  padding: 0 18px;
  pointer-events: none;
  will-change: opacity, transform;
}
#intro-brand img {
  width: clamp(80px,14vw,130px);
  height: clamp(80px,14vw,130px);
  object-fit: contain;
  filter: drop-shadow(0 8px 18px rgba(80,45,20,0.35));
}
#intro-brand .brand-text {
  text-align: center;
  max-width: min(600px,88vw);
}
#intro-brand .brand-name {
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  font-size: clamp(20px,5vw,36px);
  line-height: 1.06;
  letter-spacing: -0.01em;
  color: #2b1b12;
  text-shadow: 0 1px 0 rgba(255,255,255,0.55), 0 -1px 0 rgba(0,0,0,0.12);
}
#intro-brand .brand-sub {
  margin-top: 10px;
  font-size: clamp(8px,1.8vw,11px);
  letter-spacing: 0.26em;
  font-weight: 700;
  text-transform: uppercase;
  color: #B06A35;
}

#intro-seam {
  position: absolute;
  top: 0; left: 50%;
  width: 1px; height: 100%;
  transform: translateX(-50%);
  background: linear-gradient(180deg, rgba(0,0,0,0.10), rgba(0,0,0,0.16));
  pointer-events: none;
}
#intro-hint {
  position: absolute;
  left: 50%; bottom: 44px;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 9px;
  color: #52585b;
  pointer-events: none;
  text-align: center;
}
#intro-hint span:first-child {
  font-family: 'Outfit', sans-serif;
  font-size: 11.5px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  font-weight: 600;
}
#intro-hint .hint-arrow {
  font-size: 20px;
  line-height: 1;
  animation: floaty 2.4s ease-in-out infinite;
}

/* intro scroll room */
#intro-space { height: 100vh; pointer-events: none; }

/* ─── FLOATING BUTTONS ───────────────────────────────────────── */
.whatsapp-fab {
  position: fixed;
  bottom: 2rem; right: 2rem;
  width: 3.5rem; height: 3.5rem;
  border-radius: 50%;
  background: var(--whatsapp);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 90;
  box-shadow: 0 4px 20px rgba(37,211,102,0.4);
  transition: transform 0.3s var(--ease), box-shadow 0.3s;
}
.whatsapp-fab:hover { transform: scale(1.1); box-shadow: 0 6px 30px rgba(37,211,102,0.5); }
.whatsapp-fab svg { width: 1.75rem; height: 1.75rem; fill: currentColor; }
.scroll-progress {
  position: fixed;
  top: 0; left: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), #d4b96e);
  z-index: 200;
  width: 0%;
  transition: width 0.1s linear;
}

/* ─── ABOUT PAGE ─────────────────────────────────────────────── */
.page-hero {
  background: var(--charcoal);
  color: #fff;
  padding-top: 9rem;
  padding-bottom: 5rem;
  text-align: center;
}
.page-hero h1 { color: #fff; margin-bottom: 1rem; }
.page-hero p  { color: rgba(255,255,255,0.6); font-size: 1.1rem; max-width: 52ch; margin-inline: auto; }

/* Mobile-only extra image in exterior section */
.mobile-ext-img { display: none; }
@media (max-width: 768px) { .mobile-ext-img { display: block; } }

/* ─── RESPONSIVE ─────────────────────────────────────────────── */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .why-stats   { grid-template-columns: repeat(2, 1fr); }
  .projects-grid { grid-template-columns: repeat(2, 1fr); }
  .testimonial-card { flex: 0 0 calc(50% - 0.75rem); }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-cta  { display: none !important; }
  .hamburger { display: flex; }

  /* hero */
  .hero-h1 { font-size: clamp(2.4rem, 10vw, 3.5rem); }
  .hero-p  { font-size: 1rem; }
  .hero-stats { display: none; }

  /* layouts */
  .solutions-section { grid-template-columns: 1fr; gap: 2rem; }
  .solutions-section.reverse { direction: ltr; }
  .why-grid   { grid-template-columns: 1fr; }
  .why-img    { display: none; }
  .benefits-grid { grid-template-columns: 1fr 1fr; gap: 1.5rem; }
  .why-stats  { grid-template-columns: repeat(2, 1fr); }
  .process-layout { grid-template-columns: 1fr; }
  .process-heading-sticky { position: static; margin-bottom: 2rem; }
  .process-steps::before { display: none; }
  .step-node  { display: none; }
  .step-card  { padding: 1.25rem; }
  .faq-layout { grid-template-columns: 1fr; }
  .faq-sticky { position: static; margin-bottom: 2rem; }
  .contact-layout { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: 1fr 1fr; }
  .testimonial-card { flex: 0 0 88vw; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
  .grid-2 { grid-template-columns: 1fr; }
  .grid-3 { grid-template-columns: 1fr 1fr; }
  .grid-4 { grid-template-columns: 1fr 1fr; }
  .ba-container { aspect-ratio: 4/3; }

  /* about floating badge */
  .about-float-badge { display: none; }

  /* door intro */
  #intro-brand .brand-name { font-size: clamp(16px, 5vw, 24px); }
  #intro-brand .brand-sub  { font-size: 8px; letter-spacing: 0.18em; }

  /* solutions image */
  .solutions-img { aspect-ratio: 3/2; }

  /* navbar */
  nav { height: 3.75rem; padding-inline: 1rem; }
  .logo span { font-size: 0.875rem; }
}

@media (max-width: 480px) {
  /* prevent long email/phone text from breaking layout */
  .contact-info-item a,
  .contact-info-item p,
  .mobile-menu-bottom p { word-break: break-all; overflow-wrap: break-word; }
  .contact-info-item { gap: 0.75rem; }
  .contact-icon { width: 2.5rem; height: 2.5rem; flex-shrink: 0; }
  .contact-form-wrap { padding: 1.25rem; }
  .hero-h1 { font-size: 2.4rem; }
  .projects-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .why-stats { grid-template-columns: repeat(2, 1fr); }
  .benefits-grid { grid-template-columns: 1fr; }
  .cta-btns  { flex-direction: column; align-items: center; }
  .hero-btns { flex-direction: column; }
  .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .ba-tabs { flex-wrap: wrap; }
  .overall-score { grid-template-columns: 1fr; }
  .faq-question { font-size: 1rem; }
  .section { padding-block: clamp(2.5rem, 6vw, 4rem); }
  .container-premium, .container { padding-inline: 1rem; }
}