/* =========================================================
   UMPL — Uttaranchal Metals Pvt. Ltd.
   Stylesheet — Pure CSS, no frameworks
   ========================================================= */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

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

:root {
  --bg:         #141210;
  --bg2:        #1c1a17;
  --bg3:        #252118;
  --card:       #1e1c18;
  --border:     #2e2a22;
  --text:       #f0ece4;
  --muted:      #8a8070;
  --primary:    #d97b2a;
  --primary-dk: #b8641e;
  --primary-lt: #f5a45a;
  --copper:     #c87533;
  --radius:     12px;
  --transition: 0.25s ease;
  --shadow:     0 4px 24px rgba(0,0,0,0.5);
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button { cursor: pointer; font-family: inherit; }

/* ── Utility ──────────────────────────────────────────── */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }

.section-label {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 11px; font-weight: 700; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--primary);
  margin-bottom: 16px;
}
.section-label::before {
  content: ''; display: block; width: 8px; height: 8px;
  border-radius: 50%; background: var(--primary);
}

h1, h2, h3, h4 { font-weight: 800; line-height: 1.15; }
h1 { font-size: clamp(2.2rem, 6vw, 4.5rem); }
h2 { font-size: clamp(1.8rem, 4vw, 3rem); }
h3 { font-size: 1.25rem; }

/* ── Buttons ──────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 28px; border-radius: 8px;
  font-size: 15px; font-weight: 600;
  border: none; transition: all var(--transition);
}
.btn-primary {
  background: var(--primary); color: #000;
}
.btn-primary:hover { background: var(--primary-lt); transform: translateY(-2px); }

.btn-outline {
  background: transparent; color: var(--text);
  border: 1.5px solid var(--border);
}
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }

.btn-dark {
  background: #000; color: #fff;
}
.btn-dark:hover { background: #1a1a1a; }

.btn svg { width: 18px; height: 18px; transition: transform var(--transition); }
.btn:hover svg { transform: translateX(4px); }

/* ── Top Bar ──────────────────────────────────────────── */
.topbar {
  background: #0d0b09; border-bottom: 1px solid var(--border);
  padding: 8px 0; font-size: 13px; color: var(--muted);
}
.topbar .container {
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 8px;
}
.topbar-item { display: flex; align-items: center; gap: 6px; }
.topbar-item svg { color: var(--primary); flex-shrink: 0; }

/* ── Navigation ───────────────────────────────────────── */
.navbar {
  position: sticky; top: 0; z-index: 100;
  background: rgba(20,18,16,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 0;
}
.navbar .container {
  display: flex; align-items: center; height: 70px; gap: 40px;
}

.logo {
  display: flex; align-items: center; gap: 12px; flex-shrink: 0;
}
.logo-mark {
  width: 40px; height: 40px; background: var(--primary);
  border-radius: 8px; display: flex; align-items: center; justify-content: center;
  font-size: 18px; font-weight: 900; color: #000;
  clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
}
.logo-text { line-height: 1.1; }
.logo-name { font-size: 18px; font-weight: 800; color: var(--text); }
.logo-sub { font-size: 10px; letter-spacing: 0.1em; color: var(--muted); text-transform: uppercase; }

.nav-links {
  display: flex; align-items: center; gap: 4px; list-style: none;
  flex: 1;
}
.nav-links a {
  padding: 8px 16px; border-radius: 6px;
  font-size: 14px; font-weight: 500; color: var(--muted);
  transition: all var(--transition);
}
.nav-links a:hover, .nav-links a.active {
  color: var(--text); background: rgba(255,255,255,0.05);
}
.nav-links a.active { color: var(--primary); }

.nav-cta { margin-left: auto; flex-shrink: 0; }
.nav-cta .btn { padding: 10px 22px; font-size: 14px; }

/* Hamburger */
.hamburger {
  display: none; background: none; border: none; color: var(--text);
  padding: 8px; margin-left: auto;
}
.hamburger svg { width: 24px; height: 24px; }

/* Mobile nav */
.mobile-nav {
  display: none; position: fixed; inset: 0; top: 110px;
  background: var(--bg); z-index: 99;
  flex-direction: column; padding: 24px;
}
.mobile-nav.open { display: flex; }
.mobile-nav a {
  padding: 16px 0; font-size: 18px; font-weight: 600;
  border-bottom: 1px solid var(--border); color: var(--muted);
  transition: color var(--transition);
}
.mobile-nav a:hover { color: var(--primary); }

/* ── Pages / SPA ──────────────────────────────────────── */
.page { display: none; animation: fadeIn 0.3s ease; }
.page.active { display: block; }

@keyframes fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

/* ── Page Hero ────────────────────────────────────────── */
.page-hero {
  background: var(--bg2); border-bottom: 1px solid var(--border);
  padding: 80px 0 64px; position: relative; overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute; inset: 0;
  background-image: radial-gradient(circle at 2px 2px, rgba(255,255,255,0.04) 1px, transparent 0);
  background-size: 24px 24px;
}
.page-hero .container { position: relative; z-index: 1; }
.page-hero h1 { margin-bottom: 20px; }
.page-hero p { font-size: 1.2rem; color: var(--muted); max-width: 620px; font-weight: 300; }

/* ── HOME — Hero ──────────────────────────────────────── */
#home-hero {
  position: relative; min-height: 92vh;
  display: flex; align-items: center;
  overflow: hidden; background: #0d0b09;
}
.hero-bg {
  position: absolute; inset: 0;
  background: url('/products/copper-tubes-pipes.png') center / cover no-repeat;
  opacity: 0.28; filter: saturate(1.2);
}
.hero-bg::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(to right, rgba(13,11,9,0.95) 45%, rgba(13,11,9,0.3) 100%);
}
.hero-content { position: relative; z-index: 2; padding: 120px 0 80px; max-width: 680px; }
.hero-content h1 { margin-bottom: 24px; }
.hero-content h1 span { color: var(--primary); }
.hero-content p { font-size: 1.15rem; color: var(--muted); margin-bottom: 40px; font-weight: 300; max-width: 560px; line-height: 1.8; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

/* Stats strip */
.stats-strip {
  background: var(--bg2); border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border); padding: 40px 0;
}
.stats-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 0; text-align: center;
}
.stat-item {
  padding: 24px 16px; border-right: 1px solid var(--border);
}
.stat-item:last-child { border-right: none; }
.stat-value { font-size: 2.4rem; font-weight: 900; color: var(--primary); line-height: 1; margin-bottom: 6px; }
.stat-label { font-size: 13px; color: var(--muted); font-weight: 500; text-transform: uppercase; letter-spacing: 0.08em; }

/* Product teasers */
.section { padding: 80px 0; }
.section-header { margin-bottom: 48px; }
.section-header h2 { margin-bottom: 12px; }
.section-header p { color: var(--muted); font-size: 1.05rem; max-width: 520px; font-weight: 300; }

.product-teaser-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.teaser-card {
  position: relative; border-radius: var(--radius);
  overflow: hidden; aspect-ratio: 4/3;
  background: var(--card); border: 1px solid var(--border);
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition);
}
.teaser-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.teaser-card img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 0.5s ease;
}
.teaser-card:hover img { transform: scale(1.06); }
.teaser-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.85) 40%, transparent);
  display: flex; flex-direction: column; justify-content: flex-end;
  padding: 24px;
}
.teaser-overlay h3 { font-size: 1.1rem; margin-bottom: 4px; }
.teaser-overlay p { font-size: 13px; color: rgba(255,255,255,0.6); }
.teaser-arrow {
  position: absolute; top: 16px; right: 16px;
  width: 32px; height: 32px; border-radius: 50%;
  background: rgba(255,255,255,0.1);
  display: flex; align-items: center; justify-content: center;
  transition: background var(--transition);
}
.teaser-card:hover .teaser-arrow { background: var(--primary); }

/* Industries strip */
.industries-strip { background: var(--bg2); padding: 64px 0; border-top: 1px solid var(--border); }
.industries-grid {
  display: grid; grid-template-columns: repeat(6, 1fr); gap: 16px; margin-top: 40px;
}
.industry-item {
  background: var(--bg3); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px 16px; text-align: center;
  transition: border-color var(--transition), transform var(--transition);
}
.industry-item:hover { border-color: var(--primary); transform: translateY(-4px); }
.industry-icon { font-size: 28px; margin-bottom: 10px; }
.industry-name { font-size: 12px; font-weight: 600; color: var(--muted); text-transform: uppercase; letter-spacing: 0.06em; }

/* Trust section */
.trust-section { background: var(--bg3); border-top: 1px solid var(--border); padding: 80px 0; }
.trust-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px;
}
.trust-card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 40px 32px;
  transition: border-color var(--transition);
}
.trust-card:hover { border-color: var(--primary); }
.trust-icon {
  width: 52px; height: 52px; border-radius: 10px;
  background: rgba(217,123,42,0.15); border: 1px solid rgba(217,123,42,0.3);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 20px;
}
.trust-icon svg { width: 24px; height: 24px; color: var(--primary); }
.trust-card h3 { margin-bottom: 10px; }
.trust-card p { color: var(--muted); font-size: 14px; line-height: 1.7; }

/* CTA Banner */
.cta-banner {
  background: var(--primary); padding: 72px 0; text-align: center;
}
.cta-banner h2 { color: #000; margin-bottom: 12px; }
.cta-banner p { color: rgba(0,0,0,0.7); font-size: 1.1rem; margin-bottom: 36px; font-weight: 400; }
.cta-banner .btn-dark { font-size: 16px; padding: 16px 36px; }

/* ── PRODUCTS PAGE ────────────────────────────────────── */
.products-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px;
  padding: 72px 0;
}
.product-card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden;
  display: flex; flex-direction: column;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}
.product-card:hover { border-color: var(--primary); transform: translateY(-6px); box-shadow: var(--shadow); }

.product-img {
  position: relative; height: 200px; overflow: hidden;
}
.product-img img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 0.5s ease;
}
.product-card:hover .product-img img { transform: scale(1.07); }
.product-img::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.6) 0%, transparent 60%);
}

.product-body { padding: 28px; flex: 1; display: flex; flex-direction: column; }
.product-body h3 { margin-bottom: 10px; font-size: 1.15rem; }
.product-body p { color: var(--muted); font-size: 14px; line-height: 1.65; margin-bottom: 20px; flex: 1; }

.product-apps {
  background: var(--bg); border-radius: 8px; padding: 14px;
  margin-bottom: 22px;
}
.apps-label { font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.1em; color: var(--muted); margin-bottom: 6px; }
.apps-tag {
  display: flex; align-items: flex-start; gap: 6px; font-size: 13px; color: var(--text);
}
.apps-tag::before { content: '✓'; color: var(--primary); font-weight: 700; flex-shrink: 0; }

.product-card .btn { width: 100%; justify-content: center; }

/* ── MANUFACTURING PAGE ───────────────────────────────── */
.mfg-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 48px;
  align-items: center; padding: 80px 0;
}
.mfg-text h2 { margin-bottom: 20px; }
.mfg-text p { color: var(--muted); margin-bottom: 16px; line-height: 1.8; }
.mfg-img { border-radius: var(--radius); overflow: hidden; aspect-ratio: 4/3; }
.mfg-img img { width: 100%; height: 100%; object-fit: cover; }

.specs-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px;
  padding: 0 0 80px;
}
.spec-card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 32px;
  transition: border-color var(--transition);
}
.spec-card:hover { border-color: var(--primary); }
.spec-num {
  font-size: 2.2rem; font-weight: 900; color: var(--primary);
  margin-bottom: 8px;
}
.spec-title { font-size: 1rem; font-weight: 700; margin-bottom: 8px; }
.spec-desc { font-size: 13px; color: var(--muted); line-height: 1.6; }

.qa-section { background: var(--bg2); border-top: 1px solid var(--border); padding: 80px 0; }
.qa-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 48px; }
.qa-item {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 28px;
  display: flex; flex-direction: column; gap: 12px;
}
.qa-bullet {
  width: 40px; height: 40px; border-radius: 8px;
  background: rgba(217,123,42,0.15); border: 1px solid rgba(217,123,42,0.3);
  display: flex; align-items: center; justify-content: center;
  font-size: 18px;
}
.qa-item h3 { font-size: 1rem; }
.qa-item p { color: var(--muted); font-size: 13px; line-height: 1.6; }

/* ── ABOUT PAGE ───────────────────────────────────────── */
.about-intro { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; padding: 80px 0; }
.about-text p { color: var(--muted); margin-bottom: 20px; line-height: 1.8; font-size: 1.05rem; }
.about-img { border-radius: var(--radius); overflow: hidden; }
.about-img img { width: 100%; height: 100%; object-fit: cover; aspect-ratio: 4/3; }

.values-section { background: var(--bg2); border-top: 1px solid var(--border); padding: 80px 0; }
.values-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; margin-top: 48px; }
.value-card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 32px;
  display: flex; gap: 20px;
  transition: border-color var(--transition);
}
.value-card:hover { border-color: var(--primary); }
.value-icon { flex-shrink: 0; font-size: 28px; }
.value-card h3 { margin-bottom: 8px; }
.value-card p { color: var(--muted); font-size: 14px; line-height: 1.6; }

.timeline { padding: 80px 0; }
.timeline-list { position: relative; margin-top: 48px; }
.timeline-list::before {
  content: ''; position: absolute; left: 24px; top: 0; bottom: 0;
  width: 2px; background: linear-gradient(to bottom, var(--primary), transparent);
}
.tl-item { display: flex; gap: 32px; margin-bottom: 40px; position: relative; }
.tl-dot {
  width: 48px; height: 48px; border-radius: 50%; flex-shrink: 0;
  background: var(--bg); border: 2px solid var(--primary);
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 700; color: var(--primary);
  position: relative; z-index: 1;
}
.tl-content h3 { margin-bottom: 6px; }
.tl-content p { color: var(--muted); font-size: 14px; }

/* ── CONTACT PAGE ─────────────────────────────────────── */
.contact-layout { display: grid; grid-template-columns: 1fr 1.5fr; gap: 64px; padding: 80px 0; }

.contact-info h2 { margin-bottom: 20px; }
.contact-info p { color: var(--muted); margin-bottom: 36px; line-height: 1.8; }

.contact-detail {
  display: flex; align-items: flex-start; gap: 14px; margin-bottom: 24px;
}
.contact-icon {
  width: 42px; height: 42px; flex-shrink: 0;
  background: rgba(217,123,42,0.12); border-radius: 8px; border: 1px solid rgba(217,123,42,0.25);
  display: flex; align-items: center; justify-content: center;
  font-size: 16px;
}
.contact-detail-text { font-size: 14px; }
.contact-detail-text strong { display: block; font-weight: 600; margin-bottom: 2px; }
.contact-detail-text span { color: var(--muted); }

/* Form */
.form-card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 40px;
}
.form-title { font-size: 1.5rem; font-weight: 700; margin-bottom: 32px; }

.form-group { margin-bottom: 24px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }

label { display: block; font-size: 13px; font-weight: 600; color: var(--muted); margin-bottom: 8px; text-transform: uppercase; letter-spacing: 0.06em; }

input, select, textarea {
  width: 100%; background: var(--bg);
  border: 1.5px solid var(--border); border-radius: 8px;
  padding: 12px 16px; font-size: 15px; color: var(--text);
  font-family: inherit; transition: border-color var(--transition);
  outline: none; appearance: none;
}
input:focus, select:focus, textarea:focus { border-color: var(--primary); }
textarea { resize: vertical; min-height: 120px; }
select { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%238a8070' stroke-width='2'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 12px center; padding-right: 40px; }

select option { background: var(--bg); }

.form-submit { width: 100%; padding: 16px; font-size: 16px; font-weight: 700; margin-top: 8px; }

.form-success {
  display: none; background: rgba(34,197,94,0.1); border: 1px solid rgba(34,197,94,0.3);
  border-radius: 8px; padding: 16px; color: #4ade80; font-size: 14px;
  margin-top: 16px; text-align: center;
}

/* ── Footer ───────────────────────────────────────────── */
footer {
  background: #0a0908; border-top: 1px solid var(--border); padding: 64px 0 32px;
}
.footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px;
  margin-bottom: 48px;
}
.footer-brand p { color: var(--muted); font-size: 14px; margin-top: 16px; line-height: 1.7; max-width: 280px; }
.footer-col h4 { font-size: 13px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.1em; color: var(--muted); margin-bottom: 20px; }
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 12px; }
.footer-col a { font-size: 14px; color: var(--muted); transition: color var(--transition); }
.footer-col a:hover { color: var(--primary); }

.footer-bottom {
  border-top: 1px solid var(--border); padding-top: 28px;
  display: flex; justify-content: space-between; align-items: center;
  font-size: 13px; color: var(--muted); flex-wrap: wrap; gap: 12px;
}
.footer-bottom span { color: var(--primary); }

/* ── Scroll Reveal ────────────────────────────────────── */
.reveal {
  opacity: 0; transform: translateY(28px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible { opacity: 1; transform: none; }

/* ── Responsive ───────────────────────────────────────── */
@media (max-width: 1024px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .product-teaser-grid { grid-template-columns: repeat(2, 1fr); }
  .industries-grid { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

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

  .product-teaser-grid { grid-template-columns: 1fr; }
  .products-grid { grid-template-columns: 1fr; }
  .trust-grid { grid-template-columns: 1fr; }
  .mfg-grid { grid-template-columns: 1fr; }
  .specs-grid { grid-template-columns: 1fr; }
  .qa-list { grid-template-columns: 1fr; }
  .about-intro { grid-template-columns: 1fr; }
  .values-grid { grid-template-columns: 1fr; }
  .contact-layout { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }

  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .form-row { grid-template-columns: 1fr; }
  .industries-grid { grid-template-columns: repeat(2, 1fr); }
}