/* ============================================================
   CHART CODE ONLINE — Design System
   Signature: a live "broadcast" signal — one mentor's node radiating
   to city nodes across India. Deep navy-charcoal base, signal-green
   accent (the "on-air" light), amber + sky as secondary course-tier
   accents. Sora (display) + Inter (body) + JetBrains Mono (data).
   ============================================================ */

:root {
  --bg: #0A0E16;
  --surface: #12161F;
  --surface-2: #171C27;
  --border: #232935;
  --border-light: #2E3544;

  --text: #E8EAED;
  --text-muted: #8B94A3;
  --text-faint: #5C6472;

  --signal: #16C784;
  --signal-light: #4ADE9E;
  --signal-dim: rgba(22,199,132,0.12);

  --amber: #F0A83C;
  --amber-dim: rgba(240,168,60,0.12);
  --sky: #38BDF8;
  --sky-dim: rgba(56,189,248,0.12);

  --ff-display: 'Sora', sans-serif;
  --ff-body: 'Inter', sans-serif;
  --ff-mono: 'JetBrains Mono', monospace;

  --radius: 12px;
  --radius-lg: 18px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, .pulse-ring, .marquee-track { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--ff-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img, svg { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; }
:focus-visible { outline: 2px solid var(--signal); outline-offset: 3px; }

.container { max-width: 1180px; margin: 0 auto; padding: 0 28px; }
h1, h2, h3, h4, h5 { font-family: var(--ff-display); font-weight: 700; line-height: 1.15; letter-spacing: -0.01em; }

/* ── NAV ───────────────────────────────────────────────────── */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(10,14,22,0.9); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav-inner { max-width: 1180px; margin: 0 auto; padding: 15px 28px; display: flex; align-items: center; justify-content: space-between; }
.nav-logo { display: flex; align-items: center; gap: 10px; }
.nav-logo-mark {
  width: 34px; height: 34px; border-radius: 8px; flex-shrink: 0;
  background: var(--signal); color: var(--bg);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--ff-mono); font-weight: 700; font-size: 0.9rem;
}
.nav-logo-text { font-family: var(--ff-display); font-weight: 700; font-size: 1.02rem; color: var(--text); }
.nav-logo-text span { display: block; font-family: var(--ff-mono); font-weight: 400; font-size: 0.62rem; color: var(--signal); letter-spacing: 0.07em; margin-top: 2px; }

.nav-links { display: flex; align-items: center; gap: 28px; }
.nav-links a { font-size: 0.89rem; color: var(--text-muted); font-weight: 500; transition: color 0.2s; }
.nav-links a:hover, .nav-links a.active { color: var(--text); }
.nav-cta {
  background: var(--signal); color: var(--bg) !important; font-weight: 600;
  padding: 9px 18px; border-radius: 8px; font-size: 0.86rem;
  transition: transform 0.15s, box-shadow 0.15s;
}
.nav-cta:hover { transform: translateY(-1px); box-shadow: 0 6px 18px rgba(22,199,132,0.3); }

.hamburger { display: none; flex-direction: column; gap: 5px; background: none; border: none; padding: 6px; }
.hamburger span { width: 22px; height: 2px; background: var(--text); border-radius: 2px; }
.mobile-menu { display: none; flex-direction: column; padding: 4px 28px 18px; border-top: 1px solid var(--border); }
.mobile-menu.open { display: flex; }
.mobile-menu a { padding: 13px 0; font-size: 0.95rem; color: var(--text-muted); border-bottom: 1px solid var(--border); }
.mobile-menu a:last-child { border-bottom: none; }

@media (max-width: 900px) {
  .nav-links { display: none; }
  .hamburger { display: flex; }
}

/* ── BUTTONS ───────────────────────────────────────────────── */
.btn { display: inline-flex; align-items: center; gap: 8px; font-weight: 600; font-size: 0.93rem; padding: 13px 26px; border-radius: 9px; border: none; }
.btn-signal { background: var(--signal); color: var(--bg); transition: transform 0.15s, box-shadow 0.15s; }
.btn-signal:hover { transform: translateY(-2px); box-shadow: 0 10px 26px rgba(22,199,132,0.32); }
.btn-outline { background: transparent; color: var(--text); border: 1px solid var(--border-light); transition: border-color 0.2s, background 0.2s; }
.btn-outline:hover { border-color: var(--signal); background: rgba(22,199,132,0.06); }

/* ── HERO ──────────────────────────────────────────────────── */
.hero { padding: 68px 0 20px; position: relative; }
.hero-grid { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 40px; align-items: center; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--ff-mono); font-size: 0.74rem; letter-spacing: 0.09em; text-transform: uppercase;
  color: var(--signal); background: var(--signal-dim); border: 1px solid rgba(22,199,132,0.25);
  padding: 7px 14px; border-radius: 100px; margin-bottom: 22px;
}
.hero h1 { font-size: clamp(2.1rem, 4.4vw, 3.1rem); margin-bottom: 20px; }
.hero h1 .accent { color: var(--signal); }
.hero-sub { font-size: 1.05rem; color: var(--text-muted); max-width: 560px; margin-bottom: 30px; line-height: 1.65; }
.hero-btns { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 32px; }
.hero-trust { display: flex; flex-direction: column; gap: 10px; }
.hero-trust-item { display: flex; align-items: center; gap: 9px; font-size: 0.86rem; color: var(--text-muted); }
.hero-trust-item .dot { color: var(--signal); font-size: 0.6rem; }

/* ── BROADCAST SVG (signature element) ────────────────────── */
.broadcast-wrap { display: flex; justify-content: center; align-items: center; }
.broadcast-svg { width: 100%; max-width: 460px; height: auto; }
.pulse-ring { fill: none; stroke: var(--signal); stroke-width: 1.5; opacity: 0; transform-origin: 300px 250px; animation: pulse 3.2s ease-out infinite; }
.pulse-ring.d1 { animation-delay: 1.05s; }
.pulse-ring.d2 { animation-delay: 2.1s; }
@keyframes pulse {
  0% { opacity: 0.55; transform: scale(1); }
  100% { opacity: 0; transform: scale(3.6); }
}
.signal-line { stroke: var(--border-light); stroke-width: 1; }
.signal-line.active { stroke: var(--signal); stroke-width: 1; opacity: 0.45; stroke-dasharray: 3 4; }
.center-glow { fill: var(--signal); opacity: 0.16; }
.center-node { fill: var(--signal); }
.center-label { font-family: var(--ff-mono); font-size: 11px; font-weight: 700; fill: var(--bg); text-anchor: middle; letter-spacing: 0.05em; }
.city-node circle { fill: var(--text-faint); }
.city-node text { font-family: var(--ff-mono); font-size: 12px; fill: var(--text-muted); text-anchor: middle; }

@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; }
  .broadcast-wrap { order: -1; margin-bottom: 8px; }
  .broadcast-svg { max-width: 320px; }
}

/* ── MARQUEE ───────────────────────────────────────────────── */
.marquee-wrap { border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); background: var(--surface); overflow: hidden; padding: 12px 0; }
.marquee-track { display: flex; width: max-content; animation: marquee 26s linear infinite; }
@keyframes marquee { from { transform: translateX(0); } to { transform: translateX(-50%); } }
.marquee-item { font-family: var(--ff-mono); font-size: 0.78rem; letter-spacing: 0.08em; color: var(--text-muted); padding: 0 18px; white-space: nowrap; }
.marquee-item .sep { color: var(--signal); margin-left: 18px; }

/* ── SECTION SCAFFOLDING ───────────────────────────────────── */
.section { padding: 68px 0; }
.section-alt { background: var(--surface); }
.section-head { max-width: 640px; margin-bottom: 44px; }
.section-head.center { max-width: 640px; margin: 0 auto 44px; text-align: center; }
.section-head.center .eyebrow { justify-content: center; }
.section-title { font-size: clamp(1.6rem, 3.2vw, 2.3rem); margin-bottom: 14px; }
.section-desc { color: var(--text-muted); font-size: 1rem; line-height: 1.7; }

/* ── CARDS (generic + course + city + step) ───────────────── */
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 26px; transition: border-color 0.2s, transform 0.2s; }
.card:hover { border-color: var(--border-light); transform: translateY(-3px); }
.card h3 { margin-bottom: 8px; }
.card .desc { font-size: 0.89rem; color: var(--text-muted); line-height: 1.65; }

.section-alt .card { background: var(--surface-2); }

.course-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
@media (max-width: 980px) { .course-grid { grid-template-columns: 1fr; } }

.course-card { display: flex; flex-direction: column; padding: 30px; }
.tier { font-family: var(--ff-mono); font-size: 0.7rem; letter-spacing: 0.08em; text-transform: uppercase; padding: 4px 11px; border-radius: 100px; display: inline-block; margin-bottom: 16px; width: fit-content; }
.tier-foundation { color: var(--signal); background: var(--signal-dim); }
.tier-advanced { color: var(--amber); background: var(--amber-dim); }
.tier-specialized { color: var(--sky); background: var(--sky-dim); }
.course-card h3 { font-size: 1.28rem; margin-bottom: 10px; }
.course-price { font-family: var(--ff-mono); font-size: 1.85rem; font-weight: 700; color: var(--text); margin-top: 6px; }
.course-price-note { font-size: 0.78rem; color: var(--text-faint); margin-bottom: 18px; }
.course-features { margin-bottom: 22px; flex-grow: 1; }
.course-features li { font-size: 0.86rem; color: var(--text-muted); padding: 8px 0; border-bottom: 1px dashed var(--border); position: relative; padding-left: 18px; }
.course-features li:last-child { border-bottom: none; }
.course-features li::before { content: '→'; position: absolute; left: 0; color: var(--signal); }

/* ── CITY GRID ─────────────────────────────────────────────── */
.city-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.city-card .city-code { font-family: var(--ff-mono); font-size: 0.72rem; color: var(--signal); margin-bottom: 10px; letter-spacing: 0.06em; }
.city-card h4 { font-size: 1.05rem; margin-bottom: 8px; }
.city-card p { font-size: 0.85rem; color: var(--text-muted); line-height: 1.55; }
@media (max-width: 900px) { .city-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 540px) { .city-grid { grid-template-columns: 1fr; } }

/* ── STEPS ─────────────────────────────────────────────────── */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.step { padding: 24px 20px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); }
.step-num { font-family: var(--ff-mono); font-size: 0.74rem; color: var(--signal); letter-spacing: 0.05em; margin-bottom: 12px; }
.step h4 { font-size: 0.98rem; margin-bottom: 8px; }
.step p { font-size: 0.84rem; color: var(--text-muted); line-height: 1.6; }
@media (max-width: 900px) { .steps { grid-template-columns: 1fr 1fr; } }
@media (max-width: 540px) { .steps { grid-template-columns: 1fr; } }

/* ── COMPARE TABLE ─────────────────────────────────────────── */
table.compare-table { width: 100%; border-collapse: collapse; min-width: 640px; }
table.compare-table th, table.compare-table td { padding: 13px 16px; text-align: left; font-size: 0.87rem; border-bottom: 1px solid var(--border); }
table.compare-table th { font-family: var(--ff-mono); font-size: 0.74rem; letter-spacing: 0.04em; text-transform: uppercase; color: var(--text-muted); }
table.compare-table .section-row td { background: var(--bg); font-weight: 600; color: var(--text); font-family: var(--ff-mono); font-size: 0.74rem; letter-spacing: 0.05em; text-transform: uppercase; }
table.compare-table .yes { color: var(--signal); }
table.compare-table .no { color: var(--text-faint); }

/* ── FAQ ───────────────────────────────────────────────────── */
.faq-item { border-bottom: 1px solid var(--border); }
.faq-q { width: 100%; background: none; border: none; padding: 20px 0; display: flex; justify-content: space-between; align-items: center; gap: 16px; text-align: left; font-size: 0.97rem; font-weight: 600; color: var(--text); }
.faq-q .plus { color: var(--signal); font-family: var(--ff-mono); font-size: 1.15rem; transition: transform 0.2s; flex-shrink: 0; }
.faq-item.open .plus { transform: rotate(45deg); }
.faq-a { display: none; padding: 0 0 20px; font-size: 0.9rem; color: var(--text-muted); line-height: 1.7; max-width: 700px; }
.faq-item.open .faq-a { display: block; }

/* ── CTA BAND ──────────────────────────────────────────────── */
.cta-band { text-align: center; padding: 64px 32px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); }
.cta-band h2 { font-size: clamp(1.5rem, 3vw, 2.05rem); margin-bottom: 14px; max-width: 640px; margin-left: auto; margin-right: auto; }
.cta-band p { color: var(--text-muted); max-width: 480px; margin: 0 auto 28px; }
.cta-btns { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* ── PAGE HEADER (interior pages) ─────────────────────────── */
.page-header { padding: 52px 0 8px; }
.page-header h1 { font-size: clamp(1.9rem, 4vw, 2.7rem); max-width: 700px; margin-bottom: 16px; }
.page-header p { color: var(--text-muted); max-width: 600px; font-size: 1rem; line-height: 1.7; }
.breadcrumb { font-family: var(--ff-mono); font-size: 0.76rem; color: var(--text-faint); margin-bottom: 18px; }
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--signal); }

/* ── FOOTER ────────────────────────────────────────────────── */
footer { border-top: 1px solid var(--border); padding: 56px 0 28px; margin-top: 40px; }
.footer-grid { max-width: 1180px; margin: 0 auto 40px; padding: 0 28px; display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 36px; }
@media (max-width: 900px) { .footer-grid { grid-template-columns: 1fr 1fr; row-gap: 30px; } }
@media (max-width: 540px) { .footer-grid { grid-template-columns: 1fr; } }
.footer-brand p { font-size: 0.86rem; color: var(--text-muted); line-height: 1.7; margin-top: 14px; max-width: 270px; }
.footer-col h5 { font-family: var(--ff-mono); font-size: 0.72rem; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-faint); margin-bottom: 16px; }
.footer-col a { display: block; font-size: 0.87rem; color: var(--text-muted); margin-bottom: 11px; transition: color 0.2s; }
.footer-col a:hover { color: var(--signal); }
.footer-bottom { max-width: 1180px; margin: 0 auto; padding: 22px 28px 0; border-top: 1px solid var(--border); display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; font-size: 0.8rem; color: var(--text-faint); }

/* ── WHATSAPP FLOAT ────────────────────────────────────────── */
.wa-float {
  position: fixed; bottom: 24px; right: 24px; width: 54px; height: 54px; border-radius: 50%;
  background: var(--signal); display: flex; align-items: center; justify-content: center;
  box-shadow: 0 6px 22px rgba(22,199,132,0.35); z-index: 999; transition: transform 0.2s;
}
.wa-float:hover { transform: scale(1.08); }

/* ── SCROLL REVEAL ─────────────────────────────────────────── */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity 0.5s ease, transform 0.5s ease; }
.reveal.in { opacity: 1; transform: translateY(0); }

/* ── STAT STRIP (used on About/Home if needed) ───────────────*/
.stat-strip { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; padding: 40px 0; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.stat-item { text-align: center; }
.stat-num { font-family: var(--ff-mono); font-size: 2rem; font-weight: 700; color: var(--signal); }
.stat-label { font-size: 0.82rem; color: var(--text-muted); margin-top: 4px; }
@media (max-width: 640px) { .stat-strip { grid-template-columns: 1fr; row-gap: 26px; } }

/* ── CONTACT GRID ──────────────────────────────────────────── */
@media (max-width: 800px) { .contact-grid { grid-template-columns: 1fr !important; } }

/* ── LOGO IMAGE (replaces text mark) ──────────────────────── */
.nav-logo-mark-img { width: 34px; height: 34px; border-radius: 8px; object-fit: cover; flex-shrink: 0; border: 1px solid var(--border-light); }

/* ── MENTOR PHOTO (About page + mini credibility badge) ──── */
.about-intro-grid { display: grid; grid-template-columns: 260px 1fr; gap: 44px; align-items: start; }
@media (max-width: 780px) { .about-intro-grid { grid-template-columns: 1fr; } }
.mentor-photo-frame {
  width: 100%; max-width: 260px; aspect-ratio: 1/1; border-radius: var(--radius-lg);
  overflow: hidden; border: 1px solid var(--border-light); background: var(--surface);
  box-shadow: 0 20px 46px rgba(0,0,0,0.4);
}
.mentor-photo-frame img { width: 100%; height: 100%; object-fit: cover; display: block; }
.mentor-photo-caption { text-align: center; margin-top: 14px; font-family: var(--ff-mono); font-size: 0.74rem; color: var(--text-faint); letter-spacing: 0.04em; }

.mentor-mini-card { display: flex; align-items: center; gap: 16px; padding: 18px 22px; }
.mentor-mini-card img { width: 58px; height: 58px; border-radius: 50%; object-fit: cover; border: 2px solid var(--signal); flex-shrink: 0; }
.mentor-mini-card .mentor-mini-text strong { display: block; font-family: var(--ff-display); font-size: 1rem; color: var(--text); margin-bottom: 2px; }
.mentor-mini-card .mentor-mini-text span { font-size: 0.83rem; color: var(--text-muted); line-height: 1.5; }

/* ── CERTIFICATES ──────────────────────────────────────────── */
.cert-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
@media (max-width: 980px) { .cert-row { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .cert-row { grid-template-columns: 1fr; } }
.cert-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; display: flex; flex-direction: column; transition: border-color 0.2s, transform 0.2s; }
.cert-card:hover { border-color: var(--border-light); transform: translateY(-3px); }
.cert-img-wrap { background: #fff; padding: 8px; }
.cert-img-wrap img { width: 100%; height: auto; display: block; border-radius: 3px; }
.cert-body { padding: 16px 18px 20px; }
.cert-rank { font-family: var(--ff-mono); font-size: 0.66rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--signal); margin-bottom: 7px; }
.cert-card h4 { font-size: 0.94rem; margin-bottom: 6px; line-height: 1.3; }
.cert-card p { font-size: 0.79rem; color: var(--text-muted); line-height: 1.55; }