@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@500;600;700&family=Fredoka:wght@500;600;700&family=Manrope:wght@400;500;600;700;800&family=Space+Mono:wght@400;700&display=swap');

:root {
  /* Deep-space background layers */
  --bg: #070B1A;
  --bg-deep: #04060F;
  --surface: rgba(255, 255, 255, 0.045);
  --surface-2: rgba(255, 255, 255, 0.07);
  --surface-solid: #0D1428;
  --border: rgba(255, 255, 255, 0.10);
  --border-soft: rgba(255, 255, 255, 0.06);
  --border-glow: rgba(200, 255, 77, 0.35);

  /* Neon accents (lime stays the brand anchor) */
  --lime: #C8FF4D;
  --cyan: #4DF0FF;
  --violet: #8B5CFF;
  --pink: #FF4DE3;
  --coral: #FF6B4A;
  --gold: #FFD14D;
  --blue: #4DD8FF; /* legacy alias, keep so old pages don't break */

  /* Text */
  --ink: #F2F5FF;
  --ink-soft: #A9B2D6;
  --ink-faint: #5F6A94;

  /* Type */
  --font-display: 'Space Grotesk', 'Fredoka', sans-serif;
  --font-body: 'Manrope', sans-serif;
  --font-mono: 'Space Mono', monospace;

  /* Shape & depth: glows replace hard offset shadows */
  --radius: 18px;
  --radius-sm: 12px;
  --shadow: 0 0 24px rgba(200, 255, 77, 0.12), 0 8px 32px rgba(0, 0, 0, 0.45);
  --shadow-sm: 0 0 12px rgba(200, 255, 77, 0.10), 0 4px 16px rgba(0, 0, 0, 0.4);
  --glow-lime: 0 0 20px rgba(200, 255, 77, 0.45);
  --glow-cyan: 0 0 20px rgba(77, 240, 255, 0.40);
  --gradient-brand: linear-gradient(120deg, var(--lime), var(--cyan));
  --gradient-aurora: radial-gradient(60% 80% at 15% 0%, rgba(139, 92, 255, 0.22) 0%, transparent 60%),
                     radial-gradient(50% 70% at 85% 10%, rgba(77, 240, 255, 0.16) 0%, transparent 55%),
                     radial-gradient(40% 60% at 50% 100%, rgba(200, 255, 77, 0.10) 0%, transparent 60%);
  --container: 1160px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: 16px;
  color: var(--ink);
  line-height: 1.55;
  background: var(--bg);
  background-image: var(--gradient-aurora);
  background-attachment: fixed;
}

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

img {
  max-width: 100%;
}

::selection {
  background: var(--lime);
  color: var(--bg-deep);
}

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

h1,
h2 {
  font-family: var(--font-display);
}

.hero h1,
main h1 {
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.container {
  width: min(var(--container), 100%);
  margin: 0 auto;
  padding: 0 24px;
}

.top-bar {
  height: 4px;
  background: var(--surface-2);
}

.top-bar-fill {
  height: 100%;
  background: var(--gradient-brand);
  box-shadow: 0 0 10px rgba(77, 240, 255, 0.8);
  border-radius: 999px;
  transition: width 1s ease;
}

.page-wrap {
  padding: 24px 24px 64px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--cyan);
  margin-bottom: 12px;
}

/* Editorial rail after eyebrows — ties inner pages to the landing system */
.eyebrow::after {
  content: '';
  display: inline-block;
  width: clamp(20px, 3vw, 44px);
  height: 1px;
  background: rgba(77, 240, 255, 0.35);
}

.sec-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  text-align: center;
  margin-bottom: 40px;
}

.btn-primary,
.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  border-radius: 999px;
  transition: transform 0.15s ease, box-shadow 0.2s ease, background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.btn-primary {
  background: var(--gradient-brand);
  color: var(--bg-deep);
  padding: 16px 30px;
  border: none;
  font-weight: 700;
  box-shadow: var(--glow-lime);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: var(--glow-lime), var(--glow-cyan);
}

.btn-primary:active {
  transform: translateY(0) scale(0.97);
  box-shadow: var(--glow-lime);
}

.btn-ghost {
  color: var(--ink);
  border: 1px solid var(--border);
  background: transparent;
  padding: 14px 28px;
}

.btn-ghost:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  box-shadow: var(--glow-cyan);
}

.card-surface {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.card,
.how-card,
.price-card,
.book-panel,
.gp-card,
.learn-module,
.kpi-card,
.summary-card,
.stat-card,
.dashboard-card,
.roundcard,
.book-card,
.flashcard,
.chart-card,
.timeline-card,
.mastery-card,
.learn-side-card,
.learn-feature-card,
.price-card,
.checkout-form,
.order-summary,
.plan-card,
.faq-card,
.final-card,
.demo-card,
.sticker,
.feature-card,
.subject-card,
.subject-progress-card {
  background: var(--surface);
  border: 1px solid var(--border) !important;
  border-radius: var(--radius);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

@media (hover: hover) and (pointer: fine) {
  .card:hover,
  .how-card:hover,
  .price-card:hover,
  .book-panel:hover,
  .gp-card:hover,
  .learn-module:hover,
  .kpi-card:hover,
  .summary-card:hover,
  .stat-card:hover,
  .dashboard-card:hover,
  .roundcard:hover,
  .book-card:hover,
  .flashcard:hover,
  .chart-card:hover,
  .timeline-card:hover,
  .mastery-card:hover,
  .learn-side-card:hover,
  .learn-feature-card:hover,
  .plan-card:hover,
  .faq-card:hover,
  .final-card:hover,
  .demo-card:hover,
  .sticker:hover,
  .feature-card:hover,
  .subject-card:hover,
  .subject-progress-card:hover {
    transform: translateY(-3px);
    border-color: var(--border-glow) !important;
    box-shadow: var(--shadow);
  }
}

button,
.btn,
.button,
.button-primary,
.price-btn,
.btn.primary,
.chat-btn,
.send-btn {
  border-radius: 999px;
}

.button-primary,
.price-card.featured .price-btn,
.price-btn,
.btn.primary,
.chat-btn,
.send-btn {
  background: var(--gradient-brand) !important;
  color: var(--bg-deep) !important;
  border: none !important;
  font-weight: 700;
  box-shadow: var(--glow-lime);
  transition: box-shadow 0.2s ease, transform 0.15s ease;
}

.button-primary:hover,
.price-card.featured .price-btn:hover,
.price-btn:hover,
.btn.primary:hover,
.chat-btn:hover,
.send-btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--glow-lime), var(--glow-cyan);
}

.button-primary:active,
.price-card.featured .price-btn:active,
.price-btn:active,
.btn.primary:active,
.chat-btn:active,
.send-btn:active,
button:active,
.btn:active,
.button:active {
  transform: scale(0.96) !important;
  transition-duration: 0.08s;
}

.button-secondary,
.btn-ghost,
.btn:not(.primary),
.button:not(.button-primary),
.pick-btn {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--border);
}

.button-secondary:hover,
.btn-ghost:hover,
.btn:not(.primary):hover,
.button:not(.button-primary):hover,
.pick-btn:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  box-shadow: var(--glow-cyan);
}

input,
select,
textarea {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--ink);
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--cyan);
  box-shadow: var(--glow-cyan);
  outline: none;
}

@supports not (backdrop-filter: blur(14px)) {
  .card,
  .how-card,
  .price-card,
  .book-panel,
  .gp-card,
  .learn-module,
  .kpi-card,
  .summary-card,
  .stat-card,
  .dashboard-card,
  .roundcard,
  .book-card,
  .flashcard,
  .chart-card,
  .timeline-card,
  .mastery-card,
  .learn-side-card,
  .learn-feature-card,
  .plan-card,
  .faq-card,
  .final-card,
  .demo-card,
  .sticker,
  .feature-card,
  .subject-card,
  .subject-progress-card {
    background: var(--surface-solid);
  }
}

.beta-banner {
  background: linear-gradient(90deg, rgba(200, 255, 77, 0.12), rgba(77, 240, 255, 0.1));
  border-bottom: 1px solid var(--border);
  color: var(--ink-soft);
  font-size: 0.86rem;
  text-align: center;
  padding: 10px 16px;
}

.beta-banner strong {
  color: var(--lime);
}

.engine-status-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.engine-status {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 18px;
  display: grid;
  gap: 8px;
}

.engine-status.live {
  border-color: rgba(200, 255, 77, 0.45);
}

.engine-status.soon {
  opacity: 0.82;
}

.engine-status-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.engine-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  flex-shrink: 0;
}

.engine-dot.live {
  background: var(--lime);
  box-shadow: var(--glow-lime);
}

.engine-dot.soon {
  background: var(--ink-faint);
}

.engine-badge {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  padding: 4px 8px;
  border-radius: 999px;
}

.engine-badge.live {
  background: rgba(200, 255, 77, 0.14);
  color: var(--lime);
}

.engine-badge.soon {
  background: rgba(255, 255, 255, 0.06);
  color: var(--ink-faint);
}

.engine-status h3 {
  font-family: var(--font-display);
  font-size: 1rem;
  margin: 0;
}

.engine-status p {
  margin: 0;
  font-size: 0.84rem;
  color: var(--ink-soft);
}

.site-footer {
  padding: 48px 0 56px;
  border-top: 1px solid var(--border-soft);
  margin-top: 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: 32px;
}

.footer-brand {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.2rem;
  margin-bottom: 10px;
}

.footer-copy,
.footer-col a,
.footer-col p {
  color: var(--ink-faint);
  font-size: 0.88rem;
  line-height: 1.7;
}

.footer-col h4 {
  font-family: var(--font-display);
  font-size: 0.92rem;
  margin: 0 0 12px;
  color: var(--ink);
}

.footer-col {
  display: grid;
  gap: 8px;
  align-content: start;
}

.footer-col a:hover {
  color: var(--lime);
}

.footer-bottom {
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid var(--border-soft);
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  color: var(--ink-faint);
  font-size: 0.82rem;
}

.test-mode-note {
  background: rgba(77, 240, 255, 0.08);
  border: 1px solid rgba(77, 240, 255, 0.25);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  color: var(--ink-soft);
  font-size: 0.9rem;
  line-height: 1.6;
}

.test-mode-note strong {
  color: var(--blue);
}

@media (max-width: 900px) {
  .engine-status-grid,
  .footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 600px) {
  .engine-status-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .page-wrap {
    padding: 16px 16px 48px;
  }

  .site-nav {
    width: calc(100% - 16px);
    border-radius: var(--radius);
    margin: 8px auto 16px;
  }

  .container {
    padding: 0 16px;
  }
}

/* ---------- Gamification FX: XP toasts, level-up modal, milestone toasts, streak flame ---------- */
#hungterFXLayer {
  position: fixed;
  inset: 0;
  z-index: 9998;
  pointer-events: none;
}

.nav-streak-flame {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--gold);
  background: rgba(255, 209, 77, 0.10);
  border: 1px solid rgba(255, 209, 77, 0.30);
  border-radius: 999px;
  padding: 4px 10px;
  animation: hg-flame-pulse 2.2s ease-in-out infinite;
}

@keyframes hg-flame-pulse {
  0%, 100% { box-shadow: 0 0 0 rgba(255, 209, 77, 0); }
  50% { box-shadow: 0 0 14px rgba(255, 209, 77, 0.45); }
}

.nav-level-badge.hg-pulse {
  animation: hg-badge-pulse 0.7s ease-out;
}

@keyframes hg-badge-pulse {
  0% { box-shadow: var(--glow-lime); transform: scale(1); }
  40% { box-shadow: 0 0 26px rgba(200, 255, 77, 0.65); transform: scale(1.06); }
  100% { box-shadow: none; transform: scale(1); }
}

.hg-xp-toast {
  position: fixed;
  top: 76px;
  right: 20px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  color: var(--bg-deep);
  background: var(--gradient-brand);
  border-radius: 999px;
  padding: 8px 16px;
  box-shadow: var(--glow-lime);
  animation: hg-xp-float 1.8s ease-out forwards;
  pointer-events: none;
  z-index: 9999;
}

@keyframes hg-xp-float {
  0% { opacity: 0; transform: translateY(6px) scale(0.9); }
  15% { opacity: 1; transform: translateY(0) scale(1); }
  75% { opacity: 1; transform: translateY(-8px) scale(1); }
  100% { opacity: 0; transform: translateY(-28px) scale(0.96); }
}

.hg-milestone-toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 10px;
  max-width: 90vw;
  background: var(--surface-solid);
  border: 1px solid var(--border-glow);
  box-shadow: var(--shadow);
  border-radius: var(--radius-sm);
  padding: 12px 18px;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 0.92rem;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  animation: hg-milestone-in 0.4s ease-out;
  z-index: 9999;
}

.hg-milestone-toast.hg-leaving {
  animation: hg-milestone-out 0.4s ease-in forwards;
}

.hg-milestone-icon {
  font-size: 1.2rem;
  filter: drop-shadow(0 0 8px rgba(255, 209, 77, 0.6));
}

@keyframes hg-milestone-in {
  from { opacity: 0; transform: translate(-50%, 16px); }
  to { opacity: 1; transform: translate(-50%, 0); }
}

@keyframes hg-milestone-out {
  from { opacity: 1; transform: translate(-50%, 0); }
  to { opacity: 0; transform: translate(-50%, 16px); }
}

.hg-levelup-overlay {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(4, 6, 15, 0.72);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  pointer-events: auto;
  animation: hg-fade-in 0.25s ease-out;
  overflow: hidden;
}

@keyframes hg-fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

.hg-confetti-field {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.hg-confetti-piece {
  position: absolute;
  top: -20px;
  width: 8px;
  height: 14px;
  border-radius: 2px;
  opacity: 0.9;
  animation-name: hg-confetti-fall;
  animation-timing-function: ease-in;
  animation-fill-mode: forwards;
}

@keyframes hg-confetti-fall {
  0% { transform: translate(0, -20px) rotate(0deg); opacity: 1; }
  100% { transform: translate(var(--drift, 0), 640px) rotate(540deg); opacity: 0; }
}

.hg-levelup-card {
  position: relative;
  text-align: center;
  max-width: 380px;
  margin: 16px;
  padding: 36px 28px;
  background: var(--surface-solid);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius);
  box-shadow: var(--shadow), var(--glow-cyan);
  animation: hg-card-in 0.4s cubic-bezier(.2,.9,.3,1.3);
}

@keyframes hg-card-in {
  from { opacity: 0; transform: scale(0.85) translateY(12px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

.hg-levelup-icon {
  font-size: 3.2rem;
  margin-bottom: 8px;
  animation: hg-icon-bounce 1.4s ease-in-out infinite;
}

@keyframes hg-icon-bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.hg-levelup-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
  margin: 0 0 6px;
}

.hg-levelup-card h2 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  margin: 0 0 10px;
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hg-levelup-copy {
  color: var(--ink-soft);
  font-size: 0.92rem;
  margin: 0 0 20px;
}

.hg-levelup-dismiss {
  background: var(--gradient-brand);
  color: var(--bg-deep);
  border: none;
  border-radius: 999px;
  font-weight: 700;
  padding: 10px 22px;
  cursor: pointer;
  box-shadow: var(--glow-lime);
  transition: transform 0.15s ease;
}

.hg-levelup-dismiss:hover {
  transform: translateY(-1px);
}

/* ── Tactile press feedback, sitewide ────────────────────────────────── */
/* brand.css loads on every page, so this one rule covers every clickable
   surface across the app without touching each page's own stylesheet. */
button:active,
[role="button"]:active,
.quiz-btn:active,
.tool-btn:active,
.engine-btn:active,
.book-link:active,
.book-card:active,
.msg-action-btn:active,
.attach-btn:active,
.avatar:active,
.nav-level-badge:active,
.opt:active,
.bq-opt:active,
.pick-btn:active {
  transform: scale(0.96);
  transition-duration: 0.08s !important;
}

/* ── Futuristic FX layer (fx.js) ─────────────────────────────────────── */
.hg-reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.6s ease, transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

.hg-reveal.hg-revealed {
  opacity: 1;
  transform: translateY(0);
}

/* Animated gradient headline text */
.hg-gradient-text {
  background: linear-gradient(120deg, var(--lime), var(--cyan), var(--violet), var(--lime));
  background-size: 300% 300%;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: hg-gradient-shift 6s ease infinite;
}

@keyframes hg-gradient-shift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

/* Holographic card sheen on hover */
.hg-holo {
  position: relative;
  overflow: hidden;
}

.hg-holo::after {
  content: '';
  position: absolute;
  top: -60%;
  left: -80%;
  width: 60%;
  height: 220%;
  background: linear-gradient(105deg, transparent, rgba(255, 255, 255, 0.10), transparent);
  transform: rotate(18deg);
  transition: left 0.6s ease;
  pointer-events: none;
}

.hg-holo:hover::after {
  left: 130%;
}

/* Neon pulse ring for live badges */
.hg-live-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 8px rgba(200, 255, 77, 0.8);
  animation: hg-live-pulse 1.8s ease-in-out infinite;
}

@keyframes hg-live-pulse {
  0%, 100% { box-shadow: 0 0 6px rgba(200, 255, 77, 0.6); }
  50% { box-shadow: 0 0 14px rgba(200, 255, 77, 1); }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}

/* ── Global design polish (every page) ─────────────────────────────────── */
html { scroll-behavior: smooth; }
* { scrollbar-width: thin; scrollbar-color: rgba(200,255,77,0.35) rgba(255,255,255,0.04); }
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: rgba(255,255,255,0.03); }
::-webkit-scrollbar-thumb { background: linear-gradient(180deg, rgba(200,255,77,0.35), rgba(77,240,255,0.3)); border-radius: 999px; border: 2px solid var(--bg-deep); }
::-webkit-scrollbar-thumb:hover { background: linear-gradient(180deg, rgba(200,255,77,0.55), rgba(77,240,255,0.5)); }

img { max-width: 100%; }
button { touch-action: manipulation; }

/* Numbers everywhere read like instruments */
[class*="stat-val"], [class*="pulse-num"], .tabular { font-variant-numeric: tabular-nums; }