/* =========================================================
   VORTEX PRO — Design System
   Concept: "Answer-sheet & ink" — grounded in the product's
   own exam-palette states (grey / red / green / purple).
   ========================================================= */

:root {
  /* Color */
  --paper: #F7F6F1;
  --paper-soft: #EFEEE7;
  --ink: #15171C;
  --ink-soft: #5B5F69;
  --ink-faint: #8B8E96;
  --rule: #E2DFD4;
  --mark-red: #DE4A3C;
  --mark-red-dark: #B83A2F;
  --mark-green: #1F9D55;
  --mark-purple: #7C5CFC;
  --mark-grey: #C7C4B8;
  --white: #FFFFFF;

  /* Type */
  --font-display: 'Fraunces', Georgia, serif;
  --font-body: 'Manrope', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'Space Mono', 'Courier New', monospace;

  /* Layout */
  --max-w: 1180px;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --shadow-sm: 0 1px 2px rgba(21,23,28,0.06);
  --shadow-md: 0 8px 24px rgba(21,23,28,0.08);
  --shadow-lg: 0 24px 60px rgba(21,23,28,0.12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
}

body {
  margin: 0;
  font-family: var(--font-body);
  background: var(--paper);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  line-height: 1.5;
}

img { max-width: 100%; display: block; }

a { color: inherit; text-decoration: none; }

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.12;
  margin: 0 0 0.5em;
  letter-spacing: -0.01em;
  color: var(--ink);
}

p { margin: 0 0 1em; color: var(--ink-soft); }

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 28px;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--mark-red);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 18px;
}
.eyebrow::before {
  content: '';
  width: 7px; height: 7px;
  background: var(--mark-red);
  border-radius: 50%;
  display: inline-block;
}

.section { padding: 100px 0; position: relative; }
.section-head { max-width: 640px; margin-bottom: 56px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head h2 { font-size: clamp(1.9rem, 3.2vw, 2.6rem); }
.section-head p { font-size: 1.08rem; }

.divider-rule {
  border: none;
  border-top: 1px solid var(--rule);
  margin: 0;
}

/* ---------- Buttons ---------- */
.btn {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 1rem;
  border: none;
  border-radius: 999px;
  padding: 16px 30px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn-primary {
  background: var(--mark-red);
  color: var(--white);
  box-shadow: 0 10px 24px rgba(222,74,60,0.32);
}
.btn-primary:hover { background: var(--mark-red-dark); box-shadow: 0 14px 30px rgba(222,74,60,0.4); transform: translateY(-2px); }
.btn-primary:disabled { opacity: 0.7; cursor: wait; transform: none; }
.btn-secondary {
  background: transparent;
  color: var(--ink);
  border: 1.5px solid var(--rule);
}
.btn-secondary:hover { border-color: var(--ink); transform: translateY(-2px); }
.btn-ghost-light { background: rgba(255,255,255,0.12); color: var(--white); border: 1.5px solid rgba(255,255,255,0.35); }
.btn-ghost-light:hover { background: rgba(255,255,255,0.2); transform: translateY(-2px); }
.btn-block { width: 100%; }
.btn img.g-icon { width: 19px; height: 19px; background: var(--white); border-radius: 50%; padding: 2px; }

a:focus-visible, button:focus-visible, input:focus-visible {
  outline: 2.5px solid var(--mark-purple);
  outline-offset: 3px;
}

/* ---------- Navbar ---------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 60;
  background: rgba(247,246,241,0);
  border-bottom: 1px solid rgba(226,223,212,0);
  transition: background 0.25s ease, border-color 0.25s ease, backdrop-filter 0.25s ease;
}
.nav.scrolled {
  background: rgba(247,246,241,0.88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--rule);
}
.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 18px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 8px;
}
.brand-mark {
  width: 26px; height: 26px;
  border-radius: 7px;
  background: var(--ink);
  color: var(--paper);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 700;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
  margin: 0; padding: 0;
  font-size: 0.95rem;
  font-weight: 600;
}
.nav-links a { color: var(--ink-soft); transition: color 0.15s ease; }
.nav-links a:hover { color: var(--ink); }
.nav-cta { display: flex; align-items: center; gap: 14px; }
.nav-cta .btn { padding: 11px 22px; font-size: 0.92rem; }
.nav-burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}
.nav-burger span { width: 22px; height: 2px; background: var(--ink); border-radius: 2px; }
.mobile-menu {
  display: none;
  flex-direction: column;
  gap: 18px;
  background: var(--paper);
  border-top: 1px solid var(--rule);
  padding: 22px 28px 28px;
  font-weight: 600;
}
.mobile-menu a { color: var(--ink); font-size: 1rem; }
.mobile-menu.open { display: flex; }

@media (max-width: 880px) {
  .nav-links { display: none; }
  .nav-burger { display: flex; }
  .nav-cta .btn-secondary { display: none; }
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: 168px 0 100px;
  overflow: hidden;
  background:
    radial-gradient(circle at 1px 1px, var(--rule) 1.4px, transparent 1.4px) 0 0/26px 26px,
    var(--paper);
}
.hero-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0.35;
  z-index: 0;
  animation: float 12s ease-in-out infinite;
}
.hero-blob.b1 { width: 360px; height: 360px; background: var(--mark-red); top: -120px; right: -60px; }
.hero-blob.b2 { width: 280px; height: 280px; background: var(--mark-purple); bottom: -100px; left: 4%; animation-delay: -4s; }

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
}
.hero-copy h1 {
  font-size: clamp(2.4rem, 4.6vw, 3.6rem);
  margin-bottom: 22px;
}
.hero-copy h1 em {
  font-style: normal;
  color: var(--mark-red);
}
.hero-copy > p {
  font-size: 1.15rem;
  max-width: 480px;
  margin-bottom: 32px;
}
.hero-actions { display: flex; flex-direction: column; gap: 14px; align-items: flex-start; }
.hero-actions .btn { font-size: 1.05rem; padding: 17px 32px; }
.hero-subtext { font-family: var(--font-mono); font-size: 0.82rem; color: var(--ink-faint); }

/* Signature: live exam palette mockup */
.exam-mock {
  background: var(--white);
  border: 1px solid var(--rule);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 22px;
  transform: rotate(1.2deg);
  animation: float 9s ease-in-out infinite;
}
.exam-mock-bar { display: flex; gap: 6px; margin-bottom: 16px; }
.exam-mock-bar span { width: 9px; height: 9px; border-radius: 50%; background: var(--paper-soft); }
.exam-mock-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--ink-faint);
  margin-bottom: 14px;
  letter-spacing: 0.04em;
}
.exam-mock-timer {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--ink);
  margin-bottom: 16px;
}
.exam-mock-timer span { color: var(--mark-red); }
.palette-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 7px;
  margin-bottom: 16px;
}
.palette-cell {
  aspect-ratio: 1;
  border-radius: 6px;
  background: var(--mark-grey);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 700;
  color: rgba(255,255,255,0.85);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.5s ease;
}
.palette-cell.s-red { background: var(--mark-red); }
.palette-cell.s-green { background: var(--mark-green); }
.palette-cell.s-purple { background: var(--mark-purple); }
.palette-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--ink-faint);
}
.palette-legend i { width: 9px; height: 9px; border-radius: 3px; display: inline-block; margin-right: 5px; vertical-align: -1px; }
.palette-legend .lg-grey i { background: var(--mark-grey); }
.palette-legend .lg-red i { background: var(--mark-red); }
.palette-legend .lg-green i { background: var(--mark-green); }
.palette-legend .lg-purple i { background: var(--mark-purple); }

@keyframes float {
  0%, 100% { transform: translateY(0) rotate(1.2deg); }
  50% { transform: translateY(-14px) rotate(0deg); }
}

@media (max-width: 980px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero { padding: 140px 0 70px; }
  .exam-mock { transform: none; max-width: 420px; }
}

/* ---------- Scroll reveal ---------- */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.in-view { opacity: 1; transform: translateY(0); }

/* ---------- Feature cards ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.feature-card {
  background: var(--white);
  border: 1px solid var(--rule);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease;
}
.feature-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); border-color: transparent; }
.feature-card .icon {
  width: 42px; height: 42px;
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem;
  margin-bottom: 16px;
  background: var(--paper-soft);
}
.feature-card h3 { font-size: 1.12rem; margin-bottom: 8px; font-family: var(--font-body); font-weight: 700; }
.feature-card p { font-size: 0.96rem; margin-bottom: 0; }

.audience-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 16px;
}
.audience-tag.student { background: rgba(124,92,252,0.12); color: var(--mark-purple); }
.audience-tag.institute { background: rgba(31,157,85,0.12); color: var(--mark-green); }

.institute-cta {
  margin-top: 28px;
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  background: var(--paper-soft);
  border-radius: var(--radius-md);
  padding: 20px 24px;
}
.institute-cta p { margin: 0; font-weight: 600; color: var(--ink); font-size: 0.98rem; }

@media (max-width: 980px) { .card-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .card-grid { grid-template-columns: 1fr; } }

/* ---------- Trust / security row ---------- */
.trust-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}
.trust-item { display: flex; gap: 14px; align-items: flex-start; }
.trust-item .dot {
  width: 34px; height: 34px; flex-shrink: 0;
  border-radius: 50%;
  background: var(--ink);
  color: var(--paper);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.95rem;
}
.trust-item h4 { margin: 0 0 4px; font-size: 0.98rem; font-weight: 700; }
.trust-item p { margin: 0; font-size: 0.88rem; }
@media (max-width: 980px) { .trust-row { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .trust-row { grid-template-columns: 1fr; } }

/* ---------- How it works ---------- */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.step-card { position: relative; padding-top: 8px; }
.step-num {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--mark-red);
  display: block;
  margin-bottom: 14px;
}
.step-card h3 { font-size: 1.15rem; margin-bottom: 8px; }
.step-card p { font-size: 0.96rem; }
@media (max-width: 880px) { .steps { grid-template-columns: 1fr; gap: 36px; } }

/* ---------- CTA banner ---------- */
.cta-banner {
  background: var(--ink);
  border-radius: var(--radius-lg);
  padding: 64px 48px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-banner h2 { color: var(--white); font-size: clamp(1.7rem, 3vw, 2.3rem); max-width: 560px; margin: 0 auto 28px; }
.cta-banner::before {
  content: '';
  position: absolute;
  width: 420px; height: 420px;
  background: radial-gradient(circle, var(--mark-purple), transparent 70%);
  opacity: 0.35;
  top: -180px; right: -120px;
}
@media (max-width: 640px) { .cta-banner { padding: 48px 24px; } }

/* ---------- FAQ ---------- */
.faq-list { max-width: 760px; margin: 0 auto; }
.faq-item { border-bottom: 1px solid var(--rule); }
.faq-q {
  width: 100%;
  background: none;
  border: none;
  text-align: left;
  padding: 22px 4px;
  font-family: var(--font-body);
  font-size: 1.04rem;
  font-weight: 700;
  color: var(--ink);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.faq-q .plus { font-family: var(--font-mono); font-size: 1.3rem; color: var(--mark-red); transition: transform 0.25s ease; flex-shrink: 0; }
.faq-item.open .faq-q .plus { transform: rotate(45deg); }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  padding: 0 4px;
}
.faq-item.open .faq-a { padding: 0 4px 22px; }
.faq-a p { margin: 0; font-size: 0.98rem; }

/* ---------- Footer ---------- */
.footer { background: var(--ink); color: var(--paper); padding: 64px 0 28px; }
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 36px;
  margin-bottom: 48px;
}
.footer .brand { color: var(--paper); }
.footer .brand-mark { background: var(--paper); color: var(--ink); }
.footer-tagline { color: rgba(247,246,241,0.6); font-size: 0.92rem; margin-top: 12px; max-width: 260px; }
.footer h5 { font-family: var(--font-mono); font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.1em; color: rgba(247,246,241,0.5); margin-bottom: 16px; }
.footer-links { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 12px; }
.footer-links a { color: rgba(247,246,241,0.85); font-size: 0.95rem; }
.footer-links a:hover { color: var(--mark-red); }
.footer-bottom {
  border-top: 1px solid rgba(247,246,241,0.12);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.85rem;
  color: rgba(247,246,241,0.5);
}
@media (max-width: 880px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .footer-grid { grid-template-columns: 1fr; } }

/* ---------- WhatsApp floating button ---------- */
.wa-float {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 50;
  width: 58px; height: 58px;
  border-radius: 50%;
  background: #25D366;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 10px 26px rgba(37,211,102,0.45);
  transition: transform 0.2s ease;
}
.wa-float:hover { transform: scale(1.07); }
.wa-float svg { width: 28px; height: 28px; fill: var(--white); }
.wa-ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 2px solid #25D366;
  animation: ping 2.2s cubic-bezier(0.2,0.6,0.4,1) infinite;
}
@keyframes ping {
  0% { transform: scale(1); opacity: 0.6; }
  100% { transform: scale(1.9); opacity: 0; }
}

/* ---------- Registration modal ---------- */
#reg-section {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(21,23,28,0.55);
  backdrop-filter: blur(4px);
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.modal-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 38px 34px;
  max-width: 420px;
  width: 100%;
  box-shadow: var(--shadow-lg);
  text-align: left;
}
.modal-card .eyebrow { margin-bottom: 10px; }
.modal-card h3 { font-size: 1.4rem; margin-bottom: 6px; }
.modal-card .modal-sub { font-size: 0.95rem; margin-bottom: 26px; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 0.82rem; font-weight: 700; color: var(--ink-soft); margin-bottom: 6px; font-family: var(--font-mono); text-transform: uppercase; letter-spacing: 0.04em; }
.form-group input {
  width: 100%;
  padding: 12px 14px;
  border: 1.5px solid var(--rule);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.96rem;
  background: var(--paper);
  color: var(--ink);
}
.form-group input:focus { outline: none; border-color: var(--mark-purple); background: var(--white); }
.form-group input:disabled { color: var(--ink-faint); cursor: not-allowed; }
.modal-legal { font-size: 0.78rem; color: var(--ink-faint); margin-top: 14px; text-align: center; }
.modal-legal a { color: var(--mark-red); font-weight: 600; }

/* ---------- Legal pages ---------- */
.legal-wrap { padding: 150px 0 100px; max-width: 760px; margin: 0 auto; }
.legal-wrap h1 { font-size: clamp(2rem, 4vw, 2.6rem); margin-bottom: 10px; }
.legal-updated { font-family: var(--font-mono); font-size: 0.82rem; color: var(--ink-faint); margin-bottom: 44px; }
.legal-wrap h2 { font-size: 1.3rem; margin-top: 40px; }
.legal-wrap p, .legal-wrap li { color: var(--ink-soft); font-size: 1rem; }
.legal-wrap ul { padding-left: 22px; }
.legal-wrap a { color: var(--mark-red); font-weight: 600; }
.legal-note {
  background: var(--paper-soft);
  border-left: 3px solid var(--mark-red);
  padding: 16px 18px;
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  margin-bottom: 36px;
}
.legal-note p { margin: 0; color: var(--ink-soft); }
.back-home { display: inline-flex; align-items: center; gap: 8px; font-weight: 700; font-size: 0.92rem; margin-bottom: 30px; color: var(--ink); }