/* =============================================
   Bhavyon Buildtech - Main Stylesheet
   ============================================= */

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: 'Segoe UI', system-ui, -apple-system, sans-serif; color: #1a1a2e; background: #fff; line-height: 1.6; }
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

/* --- CSS Variables --- */
:root {
  --primary: #1565C0;
  --primary-dark: #0D47A1;
  --accent: #FF6F00;
  --accent-light: #FFA000;
  --bg-light: #F5F7FA;
  --text: #1a1a2e;
  --text-muted: #5a6a7a;
  --white: #ffffff;
  --shadow: 0 4px 24px rgba(21,101,192,0.10);
  --radius: 12px;
  --transition: 0.3s ease;
}

/* --- Utilities --- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; }
.bg-light { background: var(--bg-light); }
.accent { color: var(--accent); }

.section-header { text-align: center; margin-bottom: 56px; }
.section-tag { display: inline-block; background: rgba(21,101,192,0.08); color: var(--primary); font-size: 0.8rem; font-weight: 700; letter-spacing: 2px; text-transform: uppercase; padding: 6px 16px; border-radius: 20px; margin-bottom: 16px; }
.section-header h2 { font-size: clamp(1.8rem, 3vw, 2.6rem); font-weight: 800; line-height: 1.2; margin-bottom: 16px; }
.section-header p { font-size: 1.05rem; color: var(--text-muted); max-width: 680px; margin: 0 auto; }

/* --- Buttons --- */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 13px 28px; border-radius: 8px; font-size: 0.95rem; font-weight: 600; cursor: pointer; transition: var(--transition); border: 2px solid transparent; }
.btn-primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn-primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 20px rgba(21,101,192,0.3); }
.btn-outline { background: transparent; color: #fff; border-color: rgba(255,255,255,0.7); }
.btn-outline:hover { background: rgba(255,255,255,0.15); }
.btn-white { background: #fff; color: var(--primary); border-color: #fff; }
.btn-white:hover { background: #f0f4ff; transform: translateY(-2px); }
.btn-outline-white { background: transparent; color: #fff; border-color: rgba(255,255,255,0.7); }
.btn-outline-white:hover { background: rgba(255,255,255,0.15); }

/* =============================================
   NAVBAR
   ============================================= */
.navbar { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; padding: 16px 0; transition: var(--transition); }
.navbar.scrolled { background: rgba(255,255,255,0.97); backdrop-filter: blur(12px); box-shadow: 0 2px 20px rgba(0,0,0,0.08); padding: 10px 0; }
.navbar.scrolled .nav-links a { color: var(--text); }
.navbar.scrolled .logo-text { color: var(--text); }
.nav-inner { display: flex; align-items: center; gap: 32px; }
.logo { display: flex; align-items: center; gap: 10px; }
.logo-icon { font-size: 1.8rem; color: var(--accent); }
.logo-text { font-size: 1.2rem; font-weight: 800; color: #fff; letter-spacing: -0.5px; }
.navbar.scrolled .logo-text { color: var(--text); }
.nav-links { display: flex; align-items: center; gap: 8px; margin-left: auto; }
.nav-links a { color: rgba(255,255,255,0.9); font-size: 0.9rem; font-weight: 500; padding: 8px 14px; border-radius: 6px; transition: var(--transition); }
.nav-links a:hover, .nav-links a.active { color: #fff; background: rgba(255,255,255,0.15); }
.navbar.scrolled .nav-links a:hover, .navbar.scrolled .nav-links a.active { color: var(--primary); background: rgba(21,101,192,0.08); }
.nav-cta { padding: 10px 22px; font-size: 0.88rem; }
.hamburger { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 4px; }
.hamburger span { display: block; width: 24px; height: 2px; background: #fff; border-radius: 2px; transition: var(--transition); }
.navbar.scrolled .hamburger span { background: var(--text); }

/* =============================================
   HERO SLIDER
   ============================================= */
.hero { position: relative; height: 100vh; min-height: 600px; overflow: hidden; }
.slides-wrapper { position: relative; width: 100%; height: 100%; }
.slide { position: absolute; inset: 0; display: flex; align-items: center; opacity: 0; transition: opacity 0.8s ease; }
.slide.active { opacity: 1; z-index: 1; }
.slide-overlay { position: absolute; inset: 0; background: linear-gradient(135deg, rgba(13,71,161,0.85) 0%, rgba(21,101,192,0.6) 60%, rgba(0,0,0,0.3) 100%); z-index: 1; }
.slide-1 { background: url("../images/slider-1.svg") center/cover no-repeat, linear-gradient(135deg, #1565C0, #0D47A1); }
.slide-2 { background: url("../images/slider-2.svg") center/cover no-repeat, linear-gradient(135deg, #1B5E20, #2E7D32); }
.slide-3 { background: url("../images/slider-3.svg") center/cover no-repeat, linear-gradient(135deg, #4A148C, #6A1B9A); }
.slide-4 { background: url("../images/slider-4.svg") center/cover no-repeat, linear-gradient(135deg, #BF360C, #E64A19); }
.slide-content { position: relative; z-index: 2; max-width: 680px; }
.slide-tag { display: inline-block; background: rgba(255,255,255,0.2); color: #fff; font-size: 0.78rem; font-weight: 700; letter-spacing: 2px; text-transform: uppercase; padding: 6px 16px; border-radius: 20px; margin-bottom: 20px; border: 1px solid rgba(255,255,255,0.3); }
.slide-content h1 { font-size: clamp(2.2rem, 5vw, 3.8rem); font-weight: 900; color: #fff; line-height: 1.1; margin-bottom: 20px; }
.slide-content p { font-size: 1.1rem; color: rgba(255,255,255,0.88); margin-bottom: 32px; max-width: 520px; }
.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; }
.slide-arrow { position: absolute; top: 50%; transform: translateY(-50%); z-index: 10; background: rgba(255,255,255,0.15); border: 1px solid rgba(255,255,255,0.3); color: #fff; width: 48px; height: 48px; border-radius: 50%; font-size: 1.6rem; cursor: pointer; display: flex; align-items: center; justify-content: center; transition: var(--transition); backdrop-filter: blur(4px); }
.slide-arrow:hover { background: rgba(255,255,255,0.3); }
.slide-arrow.prev { left: 24px; }
.slide-arrow.next { right: 24px; }
.slide-dots { position: absolute; bottom: 28px; left: 50%; transform: translateX(-50%); z-index: 10; display: flex; gap: 10px; }
.dot { width: 10px; height: 10px; border-radius: 50%; background: rgba(255,255,255,0.4); cursor: pointer; transition: var(--transition); border: 2px solid rgba(255,255,255,0.6); }
.dot.active { background: #fff; width: 28px; border-radius: 5px; }

/* =============================================
   STATS BAR
   ============================================= */
.stats-bar { background: var(--primary); padding: 28px 0; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; }
.stat-item { text-align: center; padding: 12px 16px; border-right: 1px solid rgba(255,255,255,0.15); }
.stat-item:last-child { border-right: none; }
.stat-num { display: block; font-size: 1.8rem; font-weight: 900; color: var(--accent-light); line-height: 1; }
.stat-label { display: block; font-size: 0.8rem; color: rgba(255,255,255,0.8); margin-top: 4px; font-weight: 500; }

/* =============================================
   OVERVIEW
   ============================================= */
.overview-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.ov-card { background: #fff; border-radius: var(--radius); padding: 36px 28px; box-shadow: var(--shadow); border: 1px solid rgba(21,101,192,0.08); transition: var(--transition); }
.ov-card:hover { transform: translateY(-6px); box-shadow: 0 12px 40px rgba(21,101,192,0.15); }
.ov-card.featured { border-color: var(--primary); border-width: 2px; }
.ov-icon { width: 60px; height: 60px; background: linear-gradient(135deg, var(--primary), #42A5F5); border-radius: 14px; display: flex; align-items: center; justify-content: center; margin-bottom: 20px; }
.ov-icon i { font-size: 1.5rem; color: #fff; }
.ov-card h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 12px; }
.ov-card p { color: var(--text-muted); font-size: 0.93rem; line-height: 1.7; }

/* =============================================
   FEATURES GRID
   ============================================= */
.features-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.feature-card { background: #fff; border-radius: var(--radius); padding: 28px 22px; border: 1px solid #e8edf5; transition: var(--transition); }
.feature-card:hover { border-color: var(--primary); box-shadow: var(--shadow); transform: translateY(-4px); }
.feature-card i { font-size: 1.8rem; color: var(--primary); margin-bottom: 14px; display: block; }
.feature-card h4 { font-size: 0.95rem; font-weight: 700; margin-bottom: 8px; }
.feature-card p { font-size: 0.85rem; color: var(--text-muted); line-height: 1.6; }

/* =============================================
   ADVANTAGES
   ============================================= */
.adv-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 32px; }
.adv-item { display: flex; gap: 20px; align-items: flex-start; }
.adv-num { font-size: 2.5rem; font-weight: 900; color: rgba(21,101,192,0.12); line-height: 1; min-width: 56px; }
.adv-body h4 { font-size: 1rem; font-weight: 700; margin-bottom: 8px; }
.adv-body p { font-size: 0.9rem; color: var(--text-muted); line-height: 1.7; }

/* =============================================
   HOW IT WORKS
   ============================================= */
.steps { display: flex; align-items: flex-start; gap: 0; justify-content: center; flex-wrap: wrap; }
.step { text-align: center; max-width: 200px; padding: 0 16px; }
.step-num { display: inline-block; width: 32px; height: 32px; background: var(--primary); color: #fff; border-radius: 50%; font-size: 0.85rem; font-weight: 700; line-height: 32px; margin-bottom: 12px; }
.step-icon { width: 72px; height: 72px; background: linear-gradient(135deg, var(--primary), #42A5F5); border-radius: 50%; display: flex; align-items: center; justify-content: center; margin: 0 auto 16px; }
.step-icon i { font-size: 1.6rem; color: #fff; }
.step h4 { font-size: 0.95rem; font-weight: 700; margin-bottom: 8px; }
.step p { font-size: 0.83rem; color: var(--text-muted); line-height: 1.6; }
.step-arrow { color: var(--primary); font-size: 1.4rem; margin-top: 52px; opacity: 0.4; padding: 0 8px; }

/* =============================================
   CTA BANNER
   ============================================= */
.cta-banner { background: linear-gradient(135deg, var(--primary-dark), var(--primary)); padding: 72px 0; }
.cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 40px; flex-wrap: wrap; }
.cta-text h2 { font-size: clamp(1.5rem, 2.5vw, 2rem); font-weight: 800; color: #fff; margin-bottom: 10px; }
.cta-text p { color: rgba(255,255,255,0.8); font-size: 1rem; }
.cta-actions { display: flex; gap: 16px; flex-wrap: wrap; }

/* =============================================
   FOOTER
   ============================================= */
.footer { background: #0D1B2A; color: rgba(255,255,255,0.75); padding: 64px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: 40px; padding-bottom: 48px; }
.footer-brand p { font-size: 0.88rem; margin-top: 16px; line-height: 1.7; max-width: 280px; }
.footer-brand .logo-text { color: #fff; }
.social-links { display: flex; gap: 12px; margin-top: 20px; }
.social-links a { width: 36px; height: 36px; background: rgba(255,255,255,0.08); border-radius: 8px; display: flex; align-items: center; justify-content: center; color: rgba(255,255,255,0.7); transition: var(--transition); }
.social-links a:hover { background: var(--primary); color: #fff; }
.footer-col h5 { color: #fff; font-size: 0.9rem; font-weight: 700; margin-bottom: 16px; letter-spacing: 0.5px; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a { font-size: 0.87rem; color: rgba(255,255,255,0.6); transition: var(--transition); }
.footer-col ul li a:hover { color: var(--accent-light); }
.contact-list li { display: flex; gap: 10px; font-size: 0.87rem; margin-bottom: 12px; align-items: flex-start; }
.contact-list li i { color: var(--accent-light); margin-top: 3px; min-width: 14px; }
.contact-list li a { color: rgba(255,255,255,0.6); }
.contact-list li a:hover { color: var(--accent-light); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.08); padding: 20px 0; }
.footer-bottom .container { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 8px; }
.footer-bottom p { font-size: 0.82rem; color: rgba(255,255,255,0.4); }
.footer-bottom a { color: rgba(255,255,255,0.5); transition: var(--transition); }
.footer-bottom a:hover { color: var(--accent-light); }

/* =============================================
   PAGE HERO (inner pages)
   ============================================= */
.page-hero { background: linear-gradient(135deg, var(--primary-dark), var(--primary)); padding: 120px 0 64px; text-align: center; }
.page-hero h1 { font-size: clamp(2rem, 4vw, 3rem); font-weight: 900; color: #fff; margin-bottom: 16px; }
.page-hero p { font-size: 1.1rem; color: rgba(255,255,255,0.85); max-width: 600px; margin: 0 auto; }
.breadcrumb { display: flex; justify-content: center; gap: 8px; margin-top: 20px; font-size: 0.85rem; color: rgba(255,255,255,0.6); }
.breadcrumb a { color: rgba(255,255,255,0.7); }
.breadcrumb a:hover { color: #fff; }
.breadcrumb span { color: rgba(255,255,255,0.4); }

/* =============================================
   PRODUCTS PAGE
   ============================================= */
.product-section { padding: 80px 0; }
.product-block { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; margin-bottom: 80px; }
.product-block.reverse { direction: rtl; }
.product-block.reverse > * { direction: ltr; }
.product-visual { background: linear-gradient(135deg, #E3F2FD, #BBDEFB); border-radius: 20px; padding: 48px; display: flex; align-items: center; justify-content: center; min-height: 360px; }
.product-visual .big-icon { font-size: 8rem; color: var(--primary); opacity: 0.7; }
.product-info .section-tag { text-align: left; }
.product-info h2 { font-size: clamp(1.6rem, 2.5vw, 2.2rem); font-weight: 800; margin-bottom: 16px; }
.product-info p { color: var(--text-muted); margin-bottom: 24px; line-height: 1.8; }
.feature-list { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-bottom: 28px; }
.feature-list li { display: flex; align-items: center; gap: 8px; font-size: 0.88rem; font-weight: 500; }
.feature-list li i { color: var(--primary); font-size: 0.8rem; }
.product-actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* =============================================
   ABOUT PAGE
   ============================================= */
.about-intro { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.about-visual { background: linear-gradient(135deg, #E3F2FD, #BBDEFB); border-radius: 20px; padding: 48px; text-align: center; min-height: 360px; display: flex; align-items: center; justify-content: center; }
.about-visual .big-icon { font-size: 7rem; color: var(--primary); opacity: 0.7; }
.about-text h2 { font-size: clamp(1.6rem, 2.5vw, 2.2rem); font-weight: 800; margin-bottom: 20px; }
.about-text p { color: var(--text-muted); margin-bottom: 16px; line-height: 1.8; }
.values-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.value-card { background: #fff; border-radius: var(--radius); padding: 28px 22px; border: 1px solid #e8edf5; text-align: center; transition: var(--transition); }
.value-card:hover { border-color: var(--primary); box-shadow: var(--shadow); }
.value-card i { font-size: 2rem; color: var(--primary); margin-bottom: 14px; display: block; }
.value-card h4 { font-size: 0.95rem; font-weight: 700; margin-bottom: 8px; }
.value-card p { font-size: 0.85rem; color: var(--text-muted); }
.team-section { background: var(--bg-light); }

/* =============================================
   FAQ PAGE
   ============================================= */
.faq-grid { max-width: 820px; margin: 0 auto; }
.faq-item { background: #fff; border-radius: var(--radius); margin-bottom: 12px; border: 1px solid #e8edf5; overflow: hidden; }
.faq-question { display: flex; justify-content: space-between; align-items: center; padding: 22px 24px; cursor: pointer; font-weight: 600; font-size: 0.97rem; transition: var(--transition); gap: 16px; }
.faq-question:hover { color: var(--primary); }
.faq-question i { color: var(--primary); transition: var(--transition); min-width: 16px; }
.faq-item.open .faq-question i { transform: rotate(180deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.3s ease; }
.faq-answer p { padding: 0 24px 22px; color: var(--text-muted); font-size: 0.92rem; line-height: 1.8; }
.faq-item.open .faq-answer { max-height: 400px; }
.faq-categories { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; margin-bottom: 40px; }
.faq-cat-btn { padding: 8px 20px; border-radius: 20px; border: 2px solid #e8edf5; background: #fff; font-size: 0.85rem; font-weight: 600; cursor: pointer; transition: var(--transition); color: var(--text-muted); }
.faq-cat-btn.active, .faq-cat-btn:hover { border-color: var(--primary); color: var(--primary); background: rgba(21,101,192,0.05); }

/* =============================================
   CONTACT PAGE
   ============================================= */
.contact-grid { display: grid; grid-template-columns: 1fr 1.4fr; gap: 48px; align-items: start; }
.contact-info h3 { font-size: 1.4rem; font-weight: 800; margin-bottom: 16px; }
.contact-info p { color: var(--text-muted); margin-bottom: 28px; line-height: 1.8; }
.info-cards { display: flex; flex-direction: column; gap: 16px; }
.info-card { display: flex; gap: 16px; align-items: flex-start; background: #fff; border-radius: var(--radius); padding: 20px; border: 1px solid #e8edf5; }
.info-card-icon { width: 44px; height: 44px; background: linear-gradient(135deg, var(--primary), #42A5F5); border-radius: 10px; display: flex; align-items: center; justify-content: center; min-width: 44px; }
.info-card-icon i { color: #fff; font-size: 1rem; }
.info-card-body h5 { font-size: 0.85rem; font-weight: 700; margin-bottom: 4px; }
.info-card-body p, .info-card-body a { font-size: 0.88rem; color: var(--text-muted); }
.info-card-body a:hover { color: var(--primary); }
.contact-form-card { background: #fff; border-radius: 16px; padding: 40px; box-shadow: var(--shadow); border: 1px solid #e8edf5; }
.contact-form-card h3 { font-size: 1.3rem; font-weight: 800; margin-bottom: 24px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 0.85rem; font-weight: 600; margin-bottom: 6px; color: var(--text); }
.form-group input, .form-group select, .form-group textarea { width: 100%; padding: 12px 16px; border: 1.5px solid #e0e7ef; border-radius: 8px; font-size: 0.92rem; font-family: inherit; transition: var(--transition); background: #fafbfc; color: var(--text); }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { outline: none; border-color: var(--primary); background: #fff; box-shadow: 0 0 0 3px rgba(21,101,192,0.08); }
.form-group textarea { resize: vertical; min-height: 120px; }
.form-submit { width: 100%; padding: 14px; font-size: 1rem; }
.form-success { display: none; background: #E8F5E9; border: 1px solid #A5D6A7; border-radius: 8px; padding: 16px; color: #2E7D32; font-size: 0.92rem; margin-top: 16px; text-align: center; }
.map-container { margin-top: 48px; border-radius: 16px; overflow: hidden; box-shadow: var(--shadow); }
.map-container iframe { width: 100%; height: 380px; border: none; display: block; }

/* =============================================
   RESPONSIVE
   ============================================= */
@media (max-width: 1024px) {
  .features-grid { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .section { padding: 56px 0; }
  .nav-links, .nav-cta { display: none; }
  .hamburger { display: flex; }
  .nav-links.open { display: flex; flex-direction: column; position: fixed; top: 0; left: 0; right: 0; bottom: 0; background: rgba(13,27,42,0.97); z-index: 999; justify-content: center; align-items: center; gap: 24px; }
  .nav-links.open a { font-size: 1.3rem; color: #fff; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-item { border-right: none; border-bottom: 1px solid rgba(255,255,255,0.15); }
  .overview-cards { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .adv-grid { grid-template-columns: 1fr; }
  .steps { flex-direction: column; align-items: center; }
  .step-arrow { transform: rotate(90deg); margin: 0; }
  .cta-inner { flex-direction: column; text-align: center; }
  .footer-grid { grid-template-columns: 1fr; }
  .product-block, .product-block.reverse { grid-template-columns: 1fr; direction: ltr; }
  .about-intro { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .values-grid { grid-template-columns: 1fr; }
  .feature-list { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .features-grid { grid-template-columns: 1fr; }
  .hero-btns { flex-direction: column; }
  .slide-content h1 { font-size: 2rem; }
}