/* ==========================================================
   ALPHA IOT (OPC) Private Limited — Main Stylesheet
   ========================================================== */
:root {
  --navy: #0b1b36;
  --navy-2: #13294f;
  --ink: #1b2437;
  --muted: #5b6b85;
  --line: #e3e8f0;
  --bg: #ffffff;
  --bg-soft: #f4f7fb;
  --accent: #00b894;        /* AI green (nod to WhatsApp) */
  --accent-dark: #00976f;
  --accent-2: #2f6bff;      /* tech blue */
  --wa: #25d366;
  --radius: 16px;
  --shadow: 0 10px 30px rgba(11, 27, 54, .08);
  --shadow-lg: 0 20px 50px rgba(11, 27, 54, .15);
  --max: 1180px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "Plus Jakarta Sans", "Segoe UI", Roboto, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; display: block; }
a { color: var(--accent-2); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3, h4 { color: var(--navy); line-height: 1.2; font-weight: 800; }
h1 { font-size: clamp(2rem, 4.5vw, 3.3rem); letter-spacing: -.02em; }
h2 { font-size: clamp(1.6rem, 3vw, 2.4rem); letter-spacing: -.01em; }
h3 { font-size: 1.2rem; }
p { color: var(--muted); }

.container { max-width: var(--max); margin: 0 auto; padding: 0 20px; }
.section { padding: 88px 0; }
.section.soft { background: var(--bg-soft); }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 52px; }
.section-head p { margin-top: 14px; font-size: 1.08rem; }
.eyebrow {
  display: inline-block; font-size: .78rem; font-weight: 700; letter-spacing: .12em;
  text-transform: uppercase; color: var(--accent-dark);
  background: rgba(0, 184, 148, .1); padding: 6px 14px; border-radius: 999px; margin-bottom: 14px;
}
.text-accent { color: var(--accent); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px; justify-content: center;
  padding: 14px 26px; border-radius: 999px; font-weight: 700; font-size: .98rem;
  border: 2px solid transparent; cursor: pointer; transition: .2s ease; text-decoration: none !important;
  font-family: inherit;
}
.btn-primary { background: var(--accent); color: #fff; box-shadow: 0 8px 20px rgba(0, 184, 148, .3); }
.btn-primary:hover { background: var(--accent-dark); transform: translateY(-2px); }
.btn-outline { border-color: rgba(255,255,255,.4); color: #fff; }
.btn-outline:hover { background: rgba(255,255,255,.1); }
.btn-ghost { border-color: var(--line); color: var(--navy); background: #fff; }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent-dark); }
.btn-wa { background: var(--wa); color: #fff; }
.btn-wa:hover { background: #1ebe5a; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100; background: rgba(255,255,255,.95);
  backdrop-filter: blur(10px); border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none !important; }
.brand img { width: 40px; height: 40px; }
.brand-text { line-height: 1.1; }
.brand-text strong { display: block; color: var(--navy); font-size: 1.15rem; letter-spacing: .02em; }
.brand-text span { font-size: .7rem; color: var(--muted); letter-spacing: .06em; }
.nav-links { display: flex; align-items: center; gap: 26px; list-style: none; }
.nav-links a { color: var(--ink); font-weight: 600; font-size: .95rem; }
.nav-links a:hover, .nav-links a.active { color: var(--accent-dark); text-decoration: none; }
.nav-links .btn { padding: 10px 20px; color: #fff; }
.nav-toggle { display: none; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--navy); margin: 5px 0; transition: .2s; }

/* ---------- Hero ---------- */
.hero {
  background: radial-gradient(1200px 500px at 80% -10%, rgba(47,107,255,.35), transparent 60%),
              radial-gradient(900px 500px at 0% 110%, rgba(0,184,148,.28), transparent 60%),
              var(--navy);
  color: #fff; padding: 90px 0 100px; overflow: hidden;
}
.hero h1 { color: #fff; }
.hero p.lead { color: #c7d3e8; font-size: 1.15rem; margin: 20px 0 32px; max-width: 560px; }
.hero-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 56px; align-items: center; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; }
.hero-badges { display: flex; flex-wrap: wrap; gap: 18px; margin-top: 36px; color: #c7d3e8; font-size: .9rem; }
.hero-badges span::before { content: "✓ "; color: var(--accent); font-weight: 800; }
.page-hero { padding: 72px 0 64px; }
.page-hero h1 { font-size: clamp(1.9rem, 4vw, 2.8rem); }
.page-hero p.lead { max-width: 720px; }
.breadcrumb { font-size: .85rem; color: #9fb0cc; margin-bottom: 12px; }
.breadcrumb a { color: #9fb0cc; }

/* WhatsApp phone mockup */
.phone {
  width: 100%; max-width: 360px; margin: 0 auto; background: #0e1726; border-radius: 34px;
  padding: 12px; box-shadow: var(--shadow-lg), 0 0 0 1px rgba(255,255,255,.08);
}
.phone-screen { background: #ece5dd; border-radius: 24px; overflow: hidden; }
.chat-top { background: #075e54; color: #fff; display: flex; align-items: center; gap: 10px; padding: 12px 14px; }
.chat-top .avatar {
  width: 34px; height: 34px; border-radius: 50%; background: var(--accent);
  display: grid; place-items: center; font-weight: 800; font-size: .8rem;
}
.chat-top small { display: block; color: #b8e3dc; font-size: .7rem; }
.chat-body { padding: 14px 12px 18px; display: flex; flex-direction: column; gap: 8px; min-height: 380px; }
.msg {
  max-width: 82%; padding: 8px 11px; border-radius: 10px; font-size: .82rem; line-height: 1.45;
  color: #1b1b1b; box-shadow: 0 1px 1px rgba(0,0,0,.08); opacity: 0; transform: translateY(8px);
  animation: pop .45s ease forwards;
}
.msg.in { background: #fff; align-self: flex-start; border-top-left-radius: 2px; }
.msg.out { background: #dcf8c6; align-self: flex-end; border-top-right-radius: 2px; }
.msg time { display: block; text-align: right; font-size: .62rem; color: #7a8a8a; margin-top: 2px; }
.msg:nth-child(1) { animation-delay: .3s; }
.msg:nth-child(2) { animation-delay: 1.1s; }
.msg:nth-child(3) { animation-delay: 1.9s; }
.msg:nth-child(4) { animation-delay: 2.7s; }
.msg:nth-child(5) { animation-delay: 3.5s; }
@keyframes pop { to { opacity: 1; transform: translateY(0); } }

/* ---------- Trust strip ---------- */
.strip { background: #fff; border-bottom: 1px solid var(--line); padding: 26px 0; }
.strip-inner { display: flex; flex-wrap: wrap; justify-content: center; gap: 14px 40px; align-items: center; }
.strip-inner p { font-weight: 700; color: var(--navy); font-size: .9rem; }
.strip-inner span { color: var(--muted); font-weight: 600; font-size: .92rem; }

/* ---------- Cards / grids ---------- */
.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 30px;
  transition: .25s ease; position: relative;
}
.card:hover { box-shadow: var(--shadow); transform: translateY(-4px); border-color: transparent; }
.card h3 { margin: 16px 0 10px; }
.card ul { list-style: none; margin-top: 14px; }
.card ul li { padding-left: 22px; position: relative; margin: 6px 0; color: var(--muted); font-size: .95rem; }
.card ul li::before { content: "✓"; position: absolute; left: 0; color: var(--accent); font-weight: 800; }
.card .more { display: inline-block; margin-top: 16px; font-weight: 700; }
.icon {
  width: 54px; height: 54px; border-radius: 14px; display: grid; place-items: center; font-size: 1.6rem;
  background: linear-gradient(135deg, rgba(0,184,148,.15), rgba(47,107,255,.15));
}
.tag {
  position: absolute; top: 18px; right: 18px; font-size: .7rem; font-weight: 700; color: var(--accent-2);
  background: rgba(47,107,255,.1); padding: 4px 10px; border-radius: 999px;
}

/* Split feature rows */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.split + .split { margin-top: 90px; }
.split.reverse .split-media { order: -1; }
.split h2 { margin-bottom: 16px; }
.check-list { list-style: none; margin: 22px 0 28px; }
.check-list li { padding-left: 32px; position: relative; margin: 12px 0; color: var(--ink); }
.check-list li::before {
  content: "✓"; position: absolute; left: 0; top: 1px; width: 22px; height: 22px; border-radius: 50%;
  background: var(--accent); color: #fff; font-size: .75rem; display: grid; place-items: center; font-weight: 800;
}
.check-list li span { color: var(--muted); display: block; font-size: .93rem; }
.media-box {
  background: linear-gradient(135deg, var(--navy), var(--navy-2)); border-radius: 22px; padding: 34px;
  color: #fff; box-shadow: var(--shadow-lg);
}
.media-box h4 { color: #fff; margin-bottom: 14px; font-size: 1rem; }
.flow { display: flex; flex-direction: column; gap: 12px; }
.flow-step {
  background: rgba(255,255,255,.07); border: 1px solid rgba(255,255,255,.12); border-radius: 12px;
  padding: 12px 16px; display: flex; gap: 12px; align-items: center; font-size: .92rem; color: #dbe5f5;
}
.flow-step b {
  flex: 0 0 28px; height: 28px; border-radius: 50%; background: var(--accent); display: grid;
  place-items: center; color: #fff; font-size: .8rem;
}

/* Steps */
.steps { counter-reset: s; }
.step { text-align: center; padding: 10px; }
.step-num {
  width: 60px; height: 60px; margin: 0 auto 18px; border-radius: 50%; background: #fff;
  border: 2px solid var(--accent); color: var(--accent-dark); font-weight: 800; font-size: 1.3rem;
  display: grid; place-items: center; box-shadow: var(--shadow);
}
.step h3 { margin-bottom: 8px; }

/* Stats */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; text-align: center; }
.stat strong { display: block; font-size: 2.3rem; font-weight: 800; color: var(--accent); }
.stat span { color: #c7d3e8; font-size: .92rem; }
.dark { background: var(--navy); color: #fff; }
.dark h2, .dark h3 { color: #fff; }
.dark p { color: #c7d3e8; }

/* Comparison table */
.table-wrap { overflow-x: auto; border-radius: var(--radius); border: 1px solid var(--line); background: #fff; }
table { width: 100%; border-collapse: collapse; min-width: 560px; }
th, td { padding: 16px 20px; text-align: left; border-bottom: 1px solid var(--line); font-size: .95rem; }
th { background: var(--bg-soft); color: var(--navy); }
td:nth-child(3) { color: var(--accent-dark); font-weight: 600; }
tr:last-child td { border-bottom: 0; }

/* FAQ */
.faq { max-width: 820px; margin: 0 auto; }
.faq details {
  background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 18px 22px; margin-bottom: 12px;
}
.faq summary { cursor: pointer; font-weight: 700; color: var(--navy); list-style: none; position: relative; padding-right: 30px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 0; top: -2px; font-size: 1.4rem; color: var(--accent); }
.faq details[open] summary::after { content: "–"; }
.faq details p { margin-top: 12px; }

/* CTA */
.cta {
  background: linear-gradient(120deg, var(--accent-dark), var(--accent-2)); border-radius: 26px;
  padding: 56px 48px; color: #fff; display: flex; align-items: center; justify-content: space-between;
  gap: 30px; flex-wrap: wrap;
}
.cta h2 { color: #fff; }
.cta p { color: rgba(255,255,255,.88); margin-top: 8px; }
.cta .btn-primary { background: #fff; color: var(--navy); box-shadow: none; }
.cta .btn-primary:hover { background: #f0f4ff; }

/* ---------- Forms ---------- */
.form-card { background: #fff; border-radius: 22px; padding: 38px; box-shadow: var(--shadow-lg); border: 1px solid var(--line); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field { margin-bottom: 16px; }
.field label { display: block; font-weight: 600; font-size: .88rem; color: var(--navy); margin-bottom: 6px; }
.field label .req { color: #e0445a; }
.field input, .field select, .field textarea {
  width: 100%; padding: 13px 15px; border: 1.5px solid var(--line); border-radius: 10px;
  font-family: inherit; font-size: .95rem; color: var(--ink); background: #fbfcfe; transition: .2s;
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--accent); background: #fff; box-shadow: 0 0 0 4px rgba(0,184,148,.12);
}
.field textarea { resize: vertical; min-height: 120px; }
.field.error input, .field.error select, .field.error textarea { border-color: #e0445a; }
.field .err { color: #e0445a; font-size: .8rem; margin-top: 4px; display: none; }
.field.error .err { display: block; }
.hp { position: absolute; left: -9999px; }
.form-note { font-size: .82rem; color: var(--muted); margin-top: 12px; }
.form-status { display: none; margin-top: 16px; padding: 14px 16px; border-radius: 10px; font-weight: 600; font-size: .92rem; }
.form-status.ok { display: block; background: #e6f8f2; color: var(--accent-dark); }
.form-status.fail { display: block; background: #fdecee; color: #c0293f; }

.contact-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: 48px; align-items: start; }
.contact-item { display: flex; gap: 16px; margin-bottom: 26px; }
.contact-item .icon { flex: 0 0 50px; height: 50px; font-size: 1.3rem; }
.contact-item h4 { margin-bottom: 2px; }
.company-info dl { display: grid; grid-template-columns: auto 1fr; gap: 8px 16px; margin-top: 14px; font-size: .92rem; }
.company-info dt { font-weight: 700; color: var(--navy); }
.company-info dd { color: var(--muted); word-break: break-word; }

/* ---------- Footer ---------- */
.site-footer { background: #081327; color: #9fb0cc; padding: 70px 0 26px; font-size: .92rem; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 40px; }
.site-footer h4 { color: #fff; font-size: 1rem; margin-bottom: 16px; }
.site-footer ul { list-style: none; }
.site-footer li { margin: 9px 0; }
.site-footer a { color: #9fb0cc; }
.site-footer a:hover { color: var(--accent); text-decoration: none; }
.site-footer .brand-text strong { color: #fff; }
.site-footer p { color: #9fb0cc; margin-top: 14px; }
.site-footer p.tagline { color: var(--accent); font-weight: 700; font-style: italic; letter-spacing: .02em; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.08); margin-top: 50px; padding-top: 22px;
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; font-size: .85rem;
}

/* Floating WhatsApp button */
.wa-float {
  position: fixed; right: 22px; bottom: 22px; width: 58px; height: 58px; border-radius: 50%;
  background: var(--wa); display: grid; place-items: center; box-shadow: 0 10px 25px rgba(37,211,102,.45);
  z-index: 200; transition: .2s;
}
.wa-float:hover { transform: scale(1.08); }
.wa-float svg { width: 30px; height: 30px; fill: #fff; }

/* Reveal on scroll */
.reveal { opacity: 0; transform: translateY(24px); transition: .7s 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); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); gap: 30px; }
}
@media (max-width: 860px) {
  .nav-toggle { display: block; }
  .nav-links {
    position: absolute; top: 72px; left: 0; right: 0; background: #fff; flex-direction: column;
    align-items: flex-start; gap: 0; padding: 10px 20px 20px; border-bottom: 1px solid var(--line);
    display: none; box-shadow: var(--shadow);
  }
  .nav-links.open { display: flex; }
  .nav-links li { width: 100%; }
  .nav-links a { display: block; padding: 12px 0; }
  .nav-links .btn { margin-top: 8px; display: inline-flex; }
  .hero-grid, .split, .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .split.reverse .split-media { order: 0; }
  .section { padding: 64px 0; }
  .cta { padding: 40px 28px; }
}
@media (max-width: 600px) {
  .grid-2, .grid-3, .grid-4, .form-row, .footer-grid { grid-template-columns: 1fr; }
  .form-card { padding: 26px 20px; }
  .hero { padding: 60px 0 70px; }
}
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  .msg, .reveal { opacity: 1; transform: none; }
}