/* ==========================================================================
   MAHESHWARI MIRAL B — CORE STYLESHEET
   Premium corporate design system: navy/blue/amber palette, glassmorphism,
   rounded cards, soft shadows.
   ========================================================================== */

:root {
  --primary: #0F4C81;
  --secondary: #2563EB;
  --accent: #F59E0B;
  --dark: #1E293B;
  --bg: #F8FAFC;
  --white: #FFFFFF;
  --text: #1E293B;
  --text-muted: #64748B;
  --border: #E2E8F0;

  --font-heading: 'Poppins', sans-serif;
  --font-body: 'Poppins', sans-serif;

  --radius-sm: 10px;
  --radius-md: 18px;
  --radius-lg: 28px;
  --shadow-sm: 0 4px 16px rgba(15, 76, 129, 0.08);
  --shadow-md: 0 12px 32px rgba(15, 76, 129, 0.12);
  --shadow-lg: 0 24px 56px rgba(15, 76, 129, 0.2);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --container: 1180px;
}

/* ---------- Reset ---------- */
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font-body); color: var(--text); background: var(--bg); line-height: 1.7; overflow-x: hidden; }
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea, select { font-family: inherit; font-size: 1rem; }

a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--secondary); border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background: var(--primary); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
}

/* ---------- Typography ---------- */
h1, h2, h3, h4 { font-family: var(--font-heading); font-weight: 700; line-height: 1.2; color: var(--dark); }
h1 { font-size: clamp(2.1rem, 4.6vw, 3.4rem); font-weight: 700; }
h2 { font-size: clamp(1.6rem, 3.2vw, 2.4rem); font-weight: 700; }
h3 { font-size: 1.22rem; font-weight: 600; }
p { color: var(--text-muted); }

.section-eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 0.8rem; font-weight: 600; letter-spacing: 0.14em; text-transform: uppercase; color: var(--secondary);
}
.section-eyebrow::before { content: ""; width: 24px; height: 3px; background: var(--accent); border-radius: 2px; }
.section-header { max-width: 640px; margin-bottom: 40px; }
.section-header.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-header p { margin-top: 10px; font-size: 1.05rem; }

/* ---------- Layout ---------- */
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 22px; }
.section { padding: 90px 0; position: relative; }
.section-alt { background: var(--white); }
.text-center { text-align: center; }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }
.skip-link { position: absolute; top: -60px; left: 10px; z-index: 2000; background: var(--accent); color: var(--dark); padding: 10px 18px; border-radius: var(--radius-sm); transition: top 0.2s; font-weight: 600; }
.skip-link:focus { top: 10px; }

/* ---------- Scroll progress bar ---------- */
.scroll-progress { position: fixed; top: 0; left: 0; height: 3px; background: linear-gradient(90deg, var(--secondary), var(--accent)); width: 0%; z-index: 2000; transition: width 0.1s linear; }

/* ---------- Buttons ---------- */
.btn { position: relative; overflow: hidden; display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 15px 32px; border-radius: 999px; font-family: var(--font-heading); font-weight: 600; font-size: 0.96rem; transition: transform var(--transition), box-shadow var(--transition), background var(--transition); white-space: nowrap; }
.btn:active { transform: scale(0.97); }
.btn-primary { background: linear-gradient(120deg, var(--secondary) 0%, var(--primary) 100%); color: #fff; box-shadow: var(--shadow-sm); }
.btn-primary:hover { box-shadow: var(--shadow-lg); transform: translateY(-3px); }
.btn-accent { background: var(--accent); color: var(--dark); box-shadow: var(--shadow-sm); }
.btn-accent:hover { background: #e08e0a; box-shadow: var(--shadow-lg); transform: translateY(-3px); }
.btn-outline { background: transparent; border: 2px solid var(--primary); color: var(--primary); }
.btn-outline:hover { background: var(--primary); color: #fff; }
.btn-outline-light { background: rgba(255,255,255,0.08); border: 2px solid rgba(255,255,255,0.7); color: #fff; backdrop-filter: blur(6px); }
.btn-outline-light:hover { background: #fff; color: var(--primary); }
.btn-block { width: 100%; }
.btn-sm { padding: 10px 22px; font-size: 0.86rem; }
.btn .ripple { position: absolute; border-radius: 50%; transform: scale(0); animation: ripple-anim 0.6s linear; background: rgba(255,255,255,0.5); pointer-events: none; }

/* ---------- Header ---------- */
.site-header { position: sticky; top: 0; z-index: 1000; background: rgba(248,250,252,0.86); backdrop-filter: blur(12px); border-bottom: 1px solid var(--border); transition: box-shadow var(--transition), background var(--transition); }
.site-header.scrolled { box-shadow: var(--shadow-sm); background: rgba(255,255,255,0.97); }
.navbar { display: flex; align-items: center; justify-content: space-between; height: 82px; }
.logo { display: flex; align-items: center; gap: 12px; }
.logo img { width: 46px; height: 46px; border-radius: 13px; }
.logo-text { font-family: var(--font-heading); font-weight: 700; font-size: 1.12rem; color: var(--dark); line-height: 1.15; }
.logo-text small { display: block; font-weight: 500; font-size: 0.66rem; letter-spacing: 0.09em; color: var(--text-muted); text-transform: uppercase; }

.nav-menu { display: none; align-items: center; gap: 30px; }
.nav-menu a { position: relative; font-weight: 500; font-size: 0.94rem; padding: 8px 2px; color: var(--text); }
.nav-menu a::after { content: ""; position: absolute; left: 0; bottom: 0; width: 0; height: 2px; background: var(--accent); transition: width var(--transition); }
.nav-menu a:hover, .nav-menu a.active { color: var(--secondary); }
.nav-menu a:hover::after, .nav-menu a.active::after { width: 100%; }

.header-actions { display: flex; align-items: center; gap: 14px; }

.hamburger { display: flex; flex-direction: column; gap: 5px; width: 30px; padding: 6px; z-index: 1100; }
.hamburger span { display: block; height: 2.5px; width: 100%; background: var(--dark); border-radius: 2px; transition: transform var(--transition), opacity var(--transition); }
.hamburger[aria-expanded="true"] span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
.hamburger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.hamburger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

.mobile-menu { display: none; position: fixed; inset: 82px 0 0 0; z-index: 900; background: var(--dark); padding: 30px 26px; overflow-y: auto; }
.mobile-menu.open { display: block; }
.mobile-menu a { display: block; padding: 16px 0; color: #fff; font-weight: 500; font-size: 1.12rem; border-bottom: 1px solid rgba(255,255,255,0.12); }
.mobile-menu a.active { color: var(--accent); }
.mobile-menu .btn { margin-top: 22px; }

/* ---------- Hero ---------- */
.hero { position: relative; min-height: 92vh; display: flex; align-items: center; color: #fff; overflow: hidden; }
.hero-bg { position: absolute; inset: 0; z-index: 0; }
.hero-bg img { width: 100%; height: 100%; object-fit: cover; }
.hero-bg::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(15,23,42,0.72) 0%, rgba(15,76,129,0.88) 100%); }
.hero-content { position: relative; z-index: 2; max-width: 740px; }
.hero-badge { display: inline-flex; align-items: center; gap: 8px; background: rgba(255,255,255,0.12); border: 1px solid rgba(255,255,255,0.3); padding: 9px 18px; border-radius: 999px; font-size: 0.84rem; font-weight: 500; backdrop-filter: blur(8px); margin-bottom: 20px; }
.hero-badge .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); }
.hero h1 { color: #fff; margin-bottom: 16px; }
.hero h1 .accent { color: var(--accent); }
.hero p.lead { color: rgba(255,255,255,0.9); font-size: 1.16rem; max-width: 580px; margin-bottom: 30px; }
.hero-buttons { display: flex; gap: 14px; flex-wrap: wrap; }

/* ---------- Glass stat cards ---------- */
.hero-glass-row { position: relative; z-index: 3; margin-top: -60px; }
.glass-card { background: rgba(255,255,255,0.14); border: 1px solid rgba(255,255,255,0.28); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); border-radius: var(--radius-md); padding: 26px 22px; color: #fff; box-shadow: var(--shadow-md); }
.glass-card strong { display: block; font-family: var(--font-heading); font-size: 2rem; color: var(--accent); }
.glass-card span { font-size: 0.82rem; color: rgba(255,255,255,0.85); text-transform: uppercase; letter-spacing: 0.05em; }

/* ---------- Grids & Cards ---------- */
.grid { display: grid; gap: 26px; }
.grid-2 { grid-template-columns: 1fr; }
.grid-3 { grid-template-columns: 1fr; }
.grid-4 { grid-template-columns: repeat(2, 1fr); }

.service-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius-md); padding: 32px 26px; text-align: left; transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition); }
.service-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-md); border-color: var(--secondary); }
.service-icon { width: 58px; height: 58px; border-radius: var(--radius-sm); background: #EAF1FA; color: var(--primary); display: flex; align-items: center; justify-content: center; font-size: 1.6rem; margin-bottom: 18px; }
.service-card h3 { margin-bottom: 8px; }
.service-card p { font-size: 0.94rem; }

.feature-card { background: #fff; border-radius: var(--radius-md); padding: 28px 22px; box-shadow: var(--shadow-sm); border: 1px solid var(--border); transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition); text-align: center; }
.feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: var(--accent); }
.feature-card .service-icon { margin: 0 auto 16px; }

/* About preview */
.about-preview-grid { align-items: center; }
.about-check-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin: 22px 0 26px; }
.about-check-item { display: flex; align-items: center; gap: 10px; font-weight: 500; font-size: 0.94rem; }
.about-check-item .tick { width: 30px; height: 30px; border-radius: 50%; background: #EAF1FA; color: var(--secondary); display: flex; align-items: center; justify-content: center; font-weight: 700; flex-shrink: 0; }
.img-frame { position: relative; }
.img-frame img { border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); }
.img-frame .float-tag { position: absolute; bottom: -20px; left: -20px; background: #fff; border-radius: var(--radius-md); box-shadow: var(--shadow-lg); padding: 16px 20px; display: flex; align-items: center; gap: 12px; }
.img-frame .float-tag .icon-circle { width: 46px; height: 46px; border-radius: 50%; background: var(--accent); color: var(--dark); display: flex; align-items: center; justify-content: center; font-size: 1.3rem; flex-shrink: 0; }
.img-frame .float-tag strong { display: block; font-family: var(--font-heading); }
.img-frame .float-tag span { font-size: 0.78rem; }

/* Stats */
.stats-section { background: linear-gradient(120deg, var(--dark) 0%, var(--primary) 100%); color: #fff; position: relative; overflow: hidden; }
.stats-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 26px; text-align: center; }
.stat-item .stat-number { font-family: var(--font-heading); font-size: clamp(2.2rem, 4vw, 3rem); font-weight: 700; color: var(--accent); }
.stat-item .stat-label { font-size: 0.92rem; color: rgba(255,255,255,0.88); margin-top: 6px; }

/* Gallery */
.gallery-filter-bar { display: flex; gap: 10px; flex-wrap: wrap; justify-content: center; margin-bottom: 36px; }
.filter-btn { padding: 10px 22px; border-radius: 999px; border: 1.5px solid var(--border); font-weight: 500; font-size: 0.9rem; background: #fff; transition: all var(--transition); }
.filter-btn:hover { border-color: var(--secondary); color: var(--secondary); }
.filter-btn.active { background: var(--dark); border-color: var(--dark); color: #fff; }

.masonry { column-count: 1; column-gap: 18px; }
.masonry .gallery-card { break-inside: avoid; margin-bottom: 18px; }
.gallery-card { position: relative; border-radius: var(--radius-md); overflow: hidden; cursor: pointer; }
.gallery-card img { width: 100%; display: block; transition: transform 0.5s ease; }
.gallery-card:hover img { transform: scale(1.08); }
.gallery-card .cap { position: absolute; inset: auto 0 0 0; padding: 16px; background: linear-gradient(0deg, rgba(15,23,42,0.88), transparent 70%); color: #fff; font-weight: 600; opacity: 0; transition: opacity var(--transition); }
.gallery-card:hover .cap { opacity: 1; }
.gallery-card.hidden { display: none; }

.gallery-preview-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.gallery-preview-grid .gallery-card img { aspect-ratio: 4/3; object-fit: cover; }

.lightbox { position: fixed; inset: 0; z-index: 3000; background: rgba(15,23,42,0.94); display: none; align-items: center; justify-content: center; padding: 20px; }
.lightbox.open { display: flex; }
.lightbox img { max-width: 92vw; max-height: 82vh; border-radius: var(--radius-sm); }
.lightbox-close, .lightbox-prev, .lightbox-next { position: absolute; color: #fff; width: 48px; height: 48px; border-radius: 50%; background: rgba(255,255,255,0.12); display: flex; align-items: center; justify-content: center; font-size: 1.4rem; transition: background var(--transition); }
.lightbox-close:hover, .lightbox-prev:hover, .lightbox-next:hover { background: rgba(255,255,255,0.28); }
.lightbox-close { top: 22px; right: 22px; }
.lightbox-prev { left: 22px; top: 50%; transform: translateY(-50%); }
.lightbox-next { right: 22px; top: 50%; transform: translateY(-50%); }
.lightbox-caption { position: absolute; bottom: 26px; left: 0; right: 0; text-align: center; color: #fff; font-size: 0.92rem; }

/* CTA */
.cta-section { background: linear-gradient(120deg, var(--primary) 0%, var(--dark) 100%); color: #fff; border-radius: var(--radius-lg); padding: 60px 30px; text-align: center; position: relative; overflow: hidden; }
.cta-section h2 { color: #fff; margin-bottom: 10px; }
.cta-section p { color: rgba(255,255,255,0.88); margin-bottom: 26px; }
.cta-buttons { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* Timeline (About) */
.timeline { position: relative; padding-left: 42px; }
.timeline::before { content: ""; position: absolute; left: 9px; top: 0; bottom: 0; width: 2px; background: repeating-linear-gradient(180deg, var(--accent) 0 10px, transparent 10px 20px); }
.timeline-item { position: relative; padding-bottom: 34px; }
.timeline-item::before { content: ""; position: absolute; left: -42px; top: 4px; width: 20px; height: 20px; border-radius: 50%; background: #fff; border: 3px solid var(--secondary); }
.timeline-year { color: var(--secondary); font-family: var(--font-heading); font-weight: 700; font-size: 0.9rem; margin-bottom: 4px; }

/* Form */
.form-card { background: #fff; border-radius: var(--radius-lg); padding: 40px 32px; box-shadow: var(--shadow-md); border: 1px solid var(--border); }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-weight: 500; font-size: 0.9rem; margin-bottom: 7px; color: var(--dark); }
.form-group input, .form-group select, .form-group textarea { width: 100%; padding: 14px 16px; border: 1.5px solid var(--border); border-radius: var(--radius-sm); background: var(--bg); transition: border-color var(--transition); }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { outline: none; border-color: var(--secondary); background: #fff; }
.form-group textarea { resize: vertical; min-height: 130px; }
.form-error { color: #dc3545; font-size: 0.8rem; margin-top: 5px; display: none; }
.form-group.has-error input, .form-group.has-error select, .form-group.has-error textarea { border-color: #dc3545; }
.form-group.has-error .form-error { display: block; }
.form-success { display: none; background: #EAF1FA; color: var(--primary); border: 1px solid var(--secondary); border-radius: var(--radius-sm); padding: 16px 20px; margin-bottom: 20px; font-weight: 500; }
.form-success.visible { display: block; }

/* Info cards (contact page) */
.info-card { display: flex; gap: 16px; align-items: flex-start; }
.info-card .service-icon { margin-bottom: 0; flex-shrink: 0; }
.info-card h4 { font-weight: 600; margin-bottom: 4px; }
.info-card p { font-size: 0.93rem; }
.map-wrap { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-sm); margin-top: 10px; }
.map-wrap iframe { width: 100%; height: 260px; border: 0; display: block; }

/* Footer */
.site-footer { background: var(--dark); color: #b7c2d0; padding-top: 70px; }
.footer-grid { display: grid; gap: 34px; padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,0.1); }
.footer-logo { display: flex; align-items: center; gap: 10px; color: #fff; font-family: var(--font-heading); font-weight: 700; font-size: 1.15rem; margin-bottom: 16px; }
.footer-logo img { width: 40px; height: 40px; border-radius: 11px; }
.footer-about p { color: #94a3b8; font-size: 0.92rem; margin-bottom: 18px; }
.footer-col h4 { color: #fff; margin-bottom: 18px; font-size: 1.02rem; }
.footer-col ul li { margin-bottom: 12px; }
.footer-col a { color: #94a3b8; font-size: 0.92rem; transition: color var(--transition), padding-left var(--transition); }
.footer-col a:hover { color: var(--accent); padding-left: 4px; }
.footer-contact li { display: flex; gap: 10px; align-items: flex-start; margin-bottom: 16px; font-size: 0.92rem; }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; padding: 26px 0; font-size: 0.85rem; color: #64748b; flex-wrap: wrap; gap: 10px; }

/* Floating back to top */
.back-to-top { position: fixed; bottom: 26px; right: 26px; z-index: 900; width: 52px; height: 52px; border-radius: 50%; background: var(--primary); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 1.3rem; box-shadow: var(--shadow-md); opacity: 0; pointer-events: none; transform: translateY(10px); transition: opacity var(--transition), transform var(--transition); }
.back-to-top.visible { opacity: 1; pointer-events: auto; transform: translateY(0); }
.back-to-top:hover { transform: translateY(-4px); }

/* Page hero (inner pages) */
.page-hero { position: relative; padding: 160px 0 100px; color: #fff; text-align: center; overflow: hidden; }
.page-hero .hero-bg::after { background: linear-gradient(180deg, rgba(15,23,42,0.78) 0%, rgba(15,76,129,0.9) 100%); }
.page-hero h1 { color: #fff; margin-bottom: 10px; position: relative; z-index: 1; }
.breadcrumb { position: relative; z-index: 1; font-size: 0.94rem; color: rgba(255,255,255,0.82); display: flex; justify-content: center; gap: 8px; }
.breadcrumb a { color: #fff; }
.breadcrumb .sep { opacity: 0.6; }

/* Utility */
.check-list li { display: flex; gap: 10px; align-items: flex-start; margin-bottom: 12px; font-size: 0.94rem; color: var(--text-muted); }
.check-list li::before { content: "✓"; color: var(--secondary); font-weight: 700; flex-shrink: 0; }

/* Scroll reveal */
[data-animate] { opacity: 0; transform: translateY(30px); transition: opacity 0.7s ease, transform 0.7s ease; transition-delay: var(--delay, 0ms); }
[data-animate].in-view { opacity: 1; transform: translateY(0); }
[data-animate="zoom"] { transform: scale(0.9); }
[data-animate="zoom"].in-view { transform: scale(1); }
[data-animate="left"] { transform: translateX(-40px); }
[data-animate="left"].in-view { transform: translateX(0); }
[data-animate="right"] { transform: translateX(40px); }
[data-animate="right"].in-view { transform: translateX(0); }

@keyframes ripple-anim { to { transform: scale(4); opacity: 0; } }

/* Lazy load fade-in */
img[loading="lazy"] { transition: opacity 0.4s ease; }
img.lazy-loading { opacity: 0; }
img.lazy-loaded { opacity: 1; }

@media (prefers-reduced-motion: reduce) {
  [data-animate] { opacity: 1 !important; transform: none !important; }
}