/* =========================================================
   Krishna Mobiles - style.css
   Light theme, soft blue accents. Edit colours in :root.
   ========================================================= */
:root {
  --blue-900: #12306b;
  --blue-700: #1d4ed8;
  --blue-600: #2563eb;
  --blue-500: #3b82f6;
  --blue-100: #dbeafe;
  --blue-50: #eff6ff;
  --ink: #0f1b3d;
  --text: #42506b;
  --muted: #6b7a99;
  --line: #e3eaf6;
  --white: #ffffff;
  --green: #16a34a;
  --green-dark: #128a3f;
  --radius: 18px;
  --shadow-sm: 0 2px 10px rgba(37, 99, 235, .07);
  --shadow: 0 12px 34px rgba(37, 99, 235, .12);
  --font: "Inter", "Segoe UI", system-ui, -apple-system, Roboto, Arial, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0; font-family: var(--font); color: var(--text); background: var(--white);
  line-height: 1.65; overflow-x: hidden; font-size: 16px;
}
img, svg { max-width: 100%; display: block; }
a { color: var(--blue-600); text-decoration: none; }
a:hover { color: var(--blue-700); }
h1, h2, h3, h4 { color: var(--ink); line-height: 1.2; margin: 0 0 .5em; letter-spacing: -.01em; }
h1 { font-size: clamp(2rem, 5vw, 3.2rem); font-weight: 800; }
h2 { font-size: clamp(1.5rem, 3.4vw, 2.2rem); font-weight: 800; }
h3 { font-size: 1.15rem; font-weight: 700; }
p { margin: 0 0 1em; }
ul { margin: 0; padding: 0; list-style: none; }

.container { width: min(1160px, 100% - 2rem); margin-inline: auto; }
.section { padding: clamp(3rem, 7vw, 5.5rem) 0; }
.section.alt { background: linear-gradient(180deg, var(--blue-50), #fff); }
.section-head { text-align: center; max-width: 680px; margin: 0 auto 2.6rem; }
.section-head p { color: var(--muted); }
.eyebrow {
  display: inline-block; font-size: .78rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase;
  color: var(--blue-600); background: var(--blue-100); padding: .35rem .8rem; border-radius: 999px; margin-bottom: .9rem;
}
.skip-link { position: absolute; left: -999px; top: 0; background: var(--blue-600); color: #fff; padding: .6rem 1rem; z-index: 100; }
.skip-link:focus { left: 0; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .55rem;
  font: inherit; font-weight: 700; font-size: .95rem; border: 2px solid transparent; cursor: pointer;
  padding: .8rem 1.4rem; border-radius: 999px; transition: transform .2s, box-shadow .2s, background .2s, color .2s;
  text-align: center; line-height: 1.2;
}
.btn:hover { transform: translateY(-2px); }
.btn svg { width: 20px; height: 20px; flex: none; }
.btn-primary { background: linear-gradient(135deg, var(--blue-600), var(--blue-500)); color: #fff; box-shadow: 0 8px 20px rgba(37,99,235,.28); }
.btn-primary:hover { color: #fff; box-shadow: 0 12px 26px rgba(37,99,235,.36); }
.btn-wa { background: var(--green); color: #fff; box-shadow: 0 8px 20px rgba(22,163,74,.25); }
.btn-wa:hover { background: var(--green-dark); color: #fff; }
.btn-outline { background: #fff; color: var(--blue-700); border-color: var(--blue-100); }
.btn-outline:hover { border-color: var(--blue-500); color: var(--blue-700); }
.btn-sm { padding: .6rem 1rem; font-size: .85rem; }
.btn-block { width: 100%; }
:focus-visible { outline: 3px solid var(--blue-500); outline-offset: 2px; }

/* Header */
.site-header { position: sticky; top: 0; z-index: 50; background: rgba(255,255,255,.92); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.nav { display: flex; align-items: center; justify-content: space-between; gap: 1rem; min-height: 72px; }
.brand { display: flex; align-items: center; gap: .7rem; color: var(--ink); }
.brand:hover { color: var(--ink); }
.logo-mark {
  width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; flex: none;
  background: linear-gradient(135deg, var(--blue-700), var(--blue-500)); color: #fff; font-weight: 800; font-size: 1.4rem;
}
.logo-img { width: 44px; height: 44px; object-fit: contain; border-radius: 10px; flex: none; }
.brand-text strong { display: block; font-size: 1.1rem; font-weight: 800; line-height: 1.1; }
.brand-text small { color: var(--muted); font-size: .72rem; font-weight: 600; letter-spacing: .05em; }
.nav-links { display: flex; align-items: center; gap: .3rem; }
.nav-links a:not(.btn) { color: var(--text); font-weight: 600; font-size: .95rem; padding: .55rem .9rem; border-radius: 999px; }
.nav-links a:not(.btn):hover, .nav-links a.active { background: var(--blue-50); color: var(--blue-700); }
.nav-links .btn { margin-left: .5rem; }
.menu-toggle { display: none; background: var(--blue-50); border: 0; width: 44px; height: 44px; border-radius: 12px; cursor: pointer; place-items: center; }
.menu-toggle span, .menu-toggle span::before, .menu-toggle span::after {
  display: block; width: 20px; height: 2px; background: var(--blue-700); border-radius: 2px; position: relative; transition: .25s;
}
.menu-toggle span::before, .menu-toggle span::after { content: ""; position: absolute; left: 0; }
.menu-toggle span::before { top: -6px; } .menu-toggle span::after { top: 6px; }
.menu-toggle[aria-expanded="true"] span { background: transparent; }
.menu-toggle[aria-expanded="true"] span::before { top: 0; transform: rotate(45deg); }
.menu-toggle[aria-expanded="true"] span::after { top: 0; transform: rotate(-45deg); }

/* Hero */
.hero { background: radial-gradient(900px 420px at 85% -10%, var(--blue-100), transparent 70%), linear-gradient(180deg, #f6faff, #fff); overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 3rem; align-items: center; padding: clamp(2.5rem, 6vw, 5rem) 0; }
.hero h1 span { background: linear-gradient(135deg, var(--blue-700), var(--blue-500)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p.lead { font-size: 1.1rem; max-width: 540px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: .8rem; margin: 1.6rem 0; }
.trust-row { display: flex; flex-wrap: wrap; gap: .6rem 1.4rem; color: var(--muted); font-size: .9rem; font-weight: 600; }
.trust-row li { display: flex; align-items: center; gap: .4rem; }
.trust-row svg { width: 18px; height: 18px; color: var(--blue-600); }
.hero-visual { position: relative; display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.hero-tile {
  background: #fff; border: 1px solid var(--line); border-radius: 22px; padding: 1.2rem; box-shadow: var(--shadow);
  display: grid; place-items: center; text-align: center; gap: .4rem; font-weight: 700; color: var(--ink); font-size: .9rem;
}
.hero-tile svg { width: 100%; max-width: 130px; height: auto; }
.hero-tile:nth-child(2) { transform: translateY(1.6rem); }
.hero-tile:nth-child(3) { transform: translateY(-.4rem); }
.hero-tile:nth-child(4) { transform: translateY(1.2rem); }
@keyframes floaty { 0%,100% { translate: 0 0; } 50% { translate: 0 -8px; } }
.hero-tile { animation: floaty 6s ease-in-out infinite; }
.hero-tile:nth-child(2) { animation-delay: -1.5s; } .hero-tile:nth-child(3) { animation-delay: -3s; } .hero-tile:nth-child(4) { animation-delay: -4.5s; }

/* Page hero (inner pages) */
.page-hero { background: linear-gradient(180deg, var(--blue-50), #fff); padding: clamp(2.5rem, 6vw, 4rem) 0; text-align: center; border-bottom: 1px solid var(--line); }
.page-hero p { max-width: 640px; margin: 0 auto; color: var(--muted); font-size: 1.05rem; }
.crumbs { font-size: .85rem; color: var(--muted); margin-bottom: .8rem; }

/* Cards & grids */
.grid { display: grid; gap: 1.3rem; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 1.5rem;
  box-shadow: var(--shadow-sm); transition: transform .25s, box-shadow .25s, border-color .25s;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: var(--blue-100); }
.icon-box { width: 52px; height: 52px; border-radius: 14px; background: linear-gradient(135deg, var(--blue-50), var(--blue-100)); display: grid; place-items: center; color: var(--blue-700); margin-bottom: 1rem; }
.icon-box svg { width: 26px; height: 26px; }
.card p { color: var(--muted); font-size: .95rem; margin: 0; }
.cat-card { text-align: center; }
.cat-card .cat-art { background: var(--blue-50); border-radius: 14px; padding: 1rem; margin-bottom: 1rem; }
.cat-card .cat-art svg { width: 100%; max-width: 120px; height: 96px; margin: 0 auto; }
.cat-card .link { display: inline-block; margin-top: .8rem; font-weight: 700; font-size: .9rem; }

/* Products */
.product { display: flex; flex-direction: column; padding: 0; overflow: hidden; }
.product-img { background: linear-gradient(135deg, var(--blue-50), #fff); padding: 1.4rem; border-bottom: 1px solid var(--line); }
.product-img svg, .product-img img { width: 100%; height: 150px; object-fit: contain; margin: 0 auto; }
.product-body { padding: 1.2rem 1.3rem 1.4rem; display: flex; flex-direction: column; gap: .35rem; flex: 1; }
.tag { align-self: flex-start; font-size: .72rem; font-weight: 700; color: var(--blue-700); background: var(--blue-100); padding: .2rem .65rem; border-radius: 999px; }
.product-body h3 { margin: .2rem 0 0; font-size: 1.02rem; }
.product-body p { font-size: .88rem; }
.product-actions { margin-top: auto; padding-top: .9rem; display: grid; gap: .5rem; }

/* Brands */
.brand-strip { display: flex; flex-wrap: wrap; gap: 1rem; justify-content: center; align-items: stretch; }
.brand-chip {
  background: #fff; border: 1px solid var(--line); border-radius: 16px; padding: 1rem 1.6rem; min-width: 170px;
  display: grid; place-items: center; gap: .5rem; box-shadow: var(--shadow-sm); text-align: center;
}
.brand-chip img { height: 72px; width: auto; object-fit: contain; }
.brand-chip span { font-size: .8rem; color: var(--muted); font-weight: 600; }
.brand-chip.more { background: var(--blue-50); border-style: dashed; border-color: var(--blue-500); }
.brand-note { text-align: center; color: var(--muted); font-size: .92rem; margin-top: 1.4rem; }

/* Why / steps */
.why-item { display: flex; gap: 1rem; align-items: flex-start; }
.why-item .icon-box { margin: 0; flex: none; }
.why-item h3 { margin-bottom: .2rem; }
.steps { counter-reset: s; }
.step { position: relative; text-align: center; padding-top: 2.4rem; }
.step::before {
  counter-increment: s; content: counter(s); position: absolute; top: -20px; left: 50%; translate: -50% 0;
  width: 42px; height: 42px; border-radius: 50%; display: grid; place-items: center; color: #fff; font-weight: 800;
  background: linear-gradient(135deg, var(--blue-700), var(--blue-500)); box-shadow: 0 6px 16px rgba(37,99,235,.3);
}
.steps .card { margin-top: 1rem; }

/* Split / about preview */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; align-items: center; }
.panel { background: linear-gradient(135deg, var(--blue-50), #fff); border: 1px solid var(--line); border-radius: 24px; padding: 2rem; box-shadow: var(--shadow-sm); }
.check-list li { display: flex; gap: .7rem; padding: .45rem 0; }
.check-list svg { width: 22px; height: 22px; color: var(--green); flex: none; margin-top: 2px; }
.stat-row { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; }
.stat { background: #fff; border: 1px solid var(--line); border-radius: 16px; padding: 1.1rem; text-align: center; }
.stat strong { display: block; color: var(--blue-700); font-size: 1.05rem; }
.stat span { font-size: .85rem; color: var(--muted); }

/* Service detail blocks */
.service-block { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; align-items: center; padding: 2.5rem 0; border-bottom: 1px solid var(--line); }
.service-block:last-of-type { border-bottom: 0; }
.service-block:nth-child(even) .service-art { order: 2; }
.service-art { background: linear-gradient(135deg, var(--blue-50), var(--blue-100)); border-radius: 26px; padding: 2rem; display: grid; place-items: center; }
.service-art svg { width: 100%; max-width: 240px; height: 200px; }
.service-block ul.check-list { margin: 1rem 0 1.4rem; }

/* FAQ */
.faq { max-width: 820px; margin: 0 auto; display: grid; gap: .8rem; }
.faq details { background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 0 1.2rem; box-shadow: var(--shadow-sm); }
.faq summary { cursor: pointer; font-weight: 700; color: var(--ink); padding: 1.05rem 1.8rem 1.05rem 0; list-style: none; position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 0; top: 50%; translate: 0 -50%; font-size: 1.5rem; color: var(--blue-600); transition: .2s; }
.faq details[open] summary::after { content: "\2212"; }
.faq details p { color: var(--muted); padding-bottom: 1rem; margin: 0; }

/* CTA */
.cta { background: linear-gradient(135deg, var(--blue-700), var(--blue-500)); border-radius: 28px; padding: clamp(2rem, 5vw, 3.5rem); text-align: center; color: #fff; box-shadow: var(--shadow); }
.cta h2 { color: #fff; } .cta p { color: #e6efff; max-width: 560px; margin-inline: auto; }
.cta .hero-actions { justify-content: center; margin-bottom: 0; }
.cta .btn-outline { border-color: transparent; }

/* Forms */
.form-card { background: #fff; border: 1px solid var(--line); border-radius: 22px; padding: clamp(1.3rem, 3vw, 2rem); box-shadow: var(--shadow); }
.form-card h3 { font-size: 1.25rem; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.field { display: flex; flex-direction: column; gap: .35rem; }
.field.full { grid-column: 1 / -1; }
.field label { font-weight: 600; font-size: .88rem; color: var(--ink); }
.field label .req { color: #dc2626; }
.field input, .field select, .field textarea {
  font: inherit; font-size: .95rem; color: var(--ink); background: #fff; border: 1.5px solid var(--line);
  border-radius: 12px; padding: .75rem .9rem; width: 100%; transition: border-color .2s, box-shadow .2s;
}
.field textarea { min-height: 96px; resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--blue-500); box-shadow: 0 0 0 4px rgba(59,130,246,.15); }
.field.invalid input, .field.invalid select, .field.invalid textarea { border-color: #dc2626; }
.error-msg { color: #dc2626; font-size: .8rem; min-height: 1em; }
.form-note { font-size: .82rem; color: var(--muted); margin: .8rem 0 0; }

/* Modal */
.modal { position: fixed; inset: 0; z-index: 100; display: none; align-items: center; justify-content: center; padding: 1rem; background: rgba(15,27,61,.45); }
.modal.open { display: flex; }
.modal-box { width: min(640px, 100%); max-height: 92vh; overflow-y: auto; position: relative; animation: pop .25s ease; }
@keyframes pop { from { opacity: 0; transform: translateY(14px) scale(.98); } to { opacity: 1; transform: none; } }
.modal-close { position: absolute; top: .8rem; right: .8rem; width: 38px; height: 38px; border-radius: 50%; border: 0; background: var(--blue-50); color: var(--blue-700); font-size: 1.4rem; cursor: pointer; line-height: 1; }

/* Contact info */
.contact-layout { display: grid; grid-template-columns: .9fr 1.1fr; gap: 2rem; align-items: start; }
.info-item { display: flex; gap: 1rem; padding: 1rem 0; border-bottom: 1px solid var(--line); }
.info-item:last-child { border-bottom: 0; }
.info-item .icon-box { margin: 0; flex: none; width: 46px; height: 46px; }
.info-item h3 { font-size: 1rem; margin-bottom: .1rem; }
.info-item p { margin: 0; color: var(--muted); font-size: .95rem; }

/* Footer */
.site-footer { background: var(--blue-50); border-top: 1px solid var(--line); padding: 3.5rem 0 1.5rem; margin-top: 2rem; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1.3fr; gap: 2.5rem; }
.footer-grid h4 { font-size: 1rem; margin-bottom: .9rem; }
.footer-grid li { margin-bottom: .45rem; }
.footer-grid a { color: var(--text); } .footer-grid a:hover { color: var(--blue-700); }
.footer-grid p { font-size: .93rem; color: var(--muted); }
.copyright { border-top: 1px solid var(--line); margin-top: 2rem; padding-top: 1.2rem; text-align: center; font-size: .85rem; color: var(--muted); }

/* Floating WhatsApp */
.wa-float {
  position: fixed; right: 18px; bottom: 18px; z-index: 60; width: 58px; height: 58px; border-radius: 50%;
  background: var(--green); color: #fff; display: grid; place-items: center; box-shadow: 0 10px 24px rgba(22,163,74,.4);
}
.wa-float:hover { color: #fff; transform: scale(1.06); }
.wa-float svg { width: 30px; height: 30px; }

/* Reveal animation */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.reveal.visible { opacity: 1; transform: none; }

/* Responsive */
@media (max-width: 1000px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .hero-grid, .split, .service-block, .contact-layout { grid-template-columns: 1fr; gap: 2rem; }
  .service-block:nth-child(even) .service-art { order: 0; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 820px) {
  .menu-toggle { display: grid; }
  .nav-links {
    position: absolute; left: 0; right: 0; top: 100%; background: #fff; flex-direction: column; align-items: stretch;
    padding: .8rem 1rem 1.2rem; border-bottom: 1px solid var(--line); box-shadow: var(--shadow);
    display: none;
  }
  .nav-links.open { display: flex; }
  .nav-links a:not(.btn) { padding: .8rem 1rem; }
  .nav-links .btn { margin: .5rem 0 0; }
}
@media (max-width: 640px) {
  .grid-4, .grid-3, .grid-2, .form-grid, .footer-grid { grid-template-columns: 1fr; }
  .grid-4.products, .grid-3.products { grid-template-columns: repeat(2, 1fr); gap: .8rem; }
  .product-img svg, .product-img img { height: 110px; }
  .product-body { padding: .9rem; }
  .product-body p { display: none; }
  .hero-visual { gap: .7rem; }
  .btn { width: 100%; }
  .hero-actions { flex-direction: column; }
  .brand-text small { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
  .reveal { opacity: 1; transform: none; }
}