/* =========================================================
   BieMTech — Global Stylesheet
   ========================================================= */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

/* ── CSS Variables ─────────────────────────────────────── */
:root {
  --bg:          #09090f;
  --bg-card:     #111120;
  --bg-card2:    #16162a;
  --border:      rgba(255,255,255,0.07);
  --primary:     #6c6fff;
  --primary-dim: rgba(108,111,255,0.15);
  --primary-glow:rgba(108,111,255,0.35);
  --text:        #f0f1ff;
  --text-muted:  #8b8fa8;
  --text-dim:    #555878;
  --radius:      16px;
  --radius-sm:   10px;
  --transition:  0.25s cubic-bezier(0.4,0,0.2,1);
}

/* ── Reset ─────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
ul { list-style: none; }

/* ── Utility ───────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

.section { padding: 96px 0; }
.section-sm { padding: 64px 0; }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--primary-dim);
  color: var(--primary);
  border: 1px solid rgba(108,111,255,0.25);
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 5px 14px;
}

.section-label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 14px;
}

.section-title {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 17px;
  color: var(--text-muted);
  max-width: 560px;
  line-height: 1.7;
}

.text-center { text-align: center; }
.text-center .section-subtitle { margin: 0 auto; }

/* ── Noise overlay ─────────────────────────────────────── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.03'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 0;
  opacity: 0.4;
}

/* ── Navbar ────────────────────────────────────────────── */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--border);
  background: rgba(9,9,15,0.82);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.navbar__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 18px;
  letter-spacing: -0.01em;
}

.logo-mark {
  height: 38px;
  width: auto;
  flex-shrink: 0;
  display: block;
  border-radius: 10px;
}

.navbar__nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.navbar__nav a {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
  transition: color var(--transition);
}

.navbar__nav a:hover,
.navbar__nav a.active { color: var(--text); }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  padding: 9px 20px;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 20px rgba(108,111,255,0.35);
}

.btn-primary:hover {
  background: #7e81ff;
  box-shadow: 0 6px 28px rgba(108,111,255,0.5);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-outline:hover {
  border-color: rgba(255,255,255,0.18);
  background: rgba(255,255,255,0.04);
}

/* ── Hero ──────────────────────────────────────────────── */
.hero {
  position: relative;
  padding: 120px 0 100px;
  overflow: hidden;
}

.hero__glow {
  position: absolute;
  top: -160px;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 600px;
  background: radial-gradient(ellipse at center, rgba(108,111,255,0.18) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.hero__content {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 28px;
}

.hero__eyebrow { margin-bottom: -4px; }

.hero__title {
  font-size: clamp(38px, 6vw, 72px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.03em;
  max-width: 760px;
}

.hero__title span {
  background: linear-gradient(135deg, #6c6fff 0%, #c084fc 60%, #f472b6 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__subtitle {
  font-size: 18px;
  color: var(--text-muted);
  max-width: 500px;
  line-height: 1.75;
}

.hero__actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}

/* ── Founders strip ────────────────────────────────────── */
.founders-strip {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 20px 0;
  background: rgba(255,255,255,0.015);
}

.founders-strip__inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-muted);
  flex-wrap: wrap;
  text-align: center;
}

.founders-strip__inner strong { color: var(--text); font-weight: 600; }

.dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--text-dim);
  display: inline-block;
  vertical-align: middle;
}

/* ── About ─────────────────────────────────────────────── */
.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.about__visual {
  display: flex;
  justify-content: center;
}

.bm-logo-large {
  width: 220px;
  height: 220px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.bm-logo-large img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 28px;
}

.about__founders {
  margin-top: 32px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.founder-card {
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
}

.founder-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, #6c6fff, #c084fc);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 14px;
  color: #fff;
  flex-shrink: 0;
}

.founder-info { flex: 1; }
.founder-name { font-size: 14px; font-weight: 600; }
.founder-role { font-size: 12px; color: var(--text-muted); }

/* ── Apps ──────────────────────────────────────────────── */
.apps__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
  margin-top: 52px;
}

.app-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: all var(--transition);
  text-decoration: none;
  color: inherit;
}

.app-card:hover {
  border-color: rgba(108,111,255,0.3);
  background: var(--bg-card2);
  transform: translateY(-3px);
  box-shadow: 0 16px 48px rgba(0,0,0,0.4), 0 0 0 1px rgba(108,111,255,0.15);
}

.app-card__icon {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  flex-shrink: 0;
  overflow: hidden;
}

.app-card__icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.app-card__icon.math-kids {
  background: linear-gradient(135deg, #f59e0b 0%, #ef4444 100%);
  box-shadow: 0 8px 24px rgba(245,158,11,0.3);
}

.app-card__top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.app-card__name {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.app-card__desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.65;
  flex: 1;
}

.app-card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 8px;
  border-top: 1px solid var(--border);
}

.chip {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 999px;
}

.chip-orange {
  background: rgba(245,158,11,0.12);
  color: #f59e0b;
  border: 1px solid rgba(245,158,11,0.2);
}

.chip-soon {
  background: rgba(148,163,184,0.08);
  color: var(--text-muted);
  border: 1px solid rgba(148,163,184,0.12);
}

.app-card__arrow {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--primary-dim);
  border: 1px solid rgba(108,111,255,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 14px;
  transition: all var(--transition);
}

.app-card:hover .app-card__arrow {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 12px rgba(108,111,255,0.4);
}

/* ── Values ────────────────────────────────────────────── */
.values { background: rgba(255,255,255,0.01); }

.values__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 52px;
}

.value-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
}

.value-icon {
  font-size: 28px;
  margin-bottom: 16px;
}

.value-title {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 8px;
}

.value-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ── CTA ───────────────────────────────────────────────── */
.cta {
  padding: 96px 0;
}

.cta__box {
  background: linear-gradient(135deg, #10102a 0%, #16103a 100%);
  border: 1px solid rgba(108,111,255,0.2);
  border-radius: 28px;
  padding: 72px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta__box::before {
  content: '';
  position: absolute;
  top: -80px;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 300px;
  background: radial-gradient(ellipse, rgba(108,111,255,0.15) 0%, transparent 70%);
  pointer-events: none;
}

.cta__box .section-title { font-size: clamp(26px, 3.5vw, 38px); }

.cta__box .section-subtitle { margin: 16px auto 36px; }

/* ── Footer ────────────────────────────────────────────── */
footer {
  border-top: 1px solid var(--border);
  padding: 48px 0;
}

.footer__inner {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
}

.footer__brand { max-width: 280px; }

.footer__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 17px;
  margin-bottom: 12px;
}

.footer__tagline {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.7;
}

.footer__links h4 {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 14px;
}

.footer__links ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer__links a {
  font-size: 14px;
  color: var(--text-muted);
  transition: color var(--transition);
}

.footer__links a:hover { color: var(--text); }

.footer__bottom {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.footer__copy {
  font-size: 13px;
  color: var(--text-dim);
}

.footer__founders {
  font-size: 13px;
  color: var(--text-dim);
}

.footer__founders strong { color: var(--text-muted); font-weight: 500; }

/* ── Privacy Policy Page ───────────────────────────────── */
.privacy-body h2 {
  font-size: 18px;
  font-weight: 700;
  margin: 36px 0 10px;
  color: var(--text);
}

.privacy-body p {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.8;
  margin: 0 0 12px;
}

.privacy-body a {
  color: var(--primary);
}

.privacy-body h2:first-child {
  margin-top: 0;
}

/* ── Page Hero (inner pages) ───────────────────────────── */
.page-hero {
  padding: 72px 0 64px;
  border-bottom: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

.page-hero__glow {
  position: absolute;
  top: -100px;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 400px;
  background: radial-gradient(ellipse, rgba(108,111,255,0.12) 0%, transparent 70%);
  pointer-events: none;
}

/* ── Privacy Policy ────────────────────────────────────── */
.prose {
  max-width: 760px;
  margin: 0 auto;
  padding: 64px 24px 96px;
}

.prose h2 {
  font-size: 22px;
  font-weight: 700;
  margin: 52px 0 14px;
  color: var(--text);
  letter-spacing: -0.01em;
}

.prose h2:first-of-type { margin-top: 0; }

.prose p {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 16px;
}

.prose ul {
  list-style: none;
  margin: 0 0 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.prose ul li {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.7;
  padding-left: 20px;
  position: relative;
}

.prose ul li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--primary);
  font-size: 13px;
}

.prose strong { color: var(--text); font-weight: 600; }

.prose a { color: var(--primary); }
.prose a:hover { text-decoration: underline; }

.prose .last-updated {
  font-size: 13px;
  color: var(--text-dim);
  margin-bottom: 48px;
  padding: 12px 18px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  display: inline-block;
}

/* ── Math Kids page ────────────────────────────────────── */
.coming-soon {
  min-height: calc(100vh - 64px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 60px 24px;
}

.coming-soon__box {
  text-align: center;
  max-width: 500px;
}

.coming-soon__icon {
  width: 100px;
  height: 100px;
  margin: 0 auto 32px;
  border-radius: 28px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 16px 48px rgba(245,158,11,0.3);
}

.coming-soon__icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.coming-soon__title {
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 900;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
}

.coming-soon__subtitle {
  font-size: 17px;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 40px;
}

.store-buttons {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.store-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 20px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-muted);
  cursor: not-allowed;
  opacity: 0.6;
}

.store-btn svg { flex-shrink: 0; }

.notify-box {
  margin-top: 48px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
}

.notify-box p {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.notify-form {
  display: flex;
  gap: 8px;
}

.notify-input {
  flex: 1;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-size: 14px;
  color: var(--text);
  font-family: inherit;
  transition: border-color var(--transition);
}

.notify-input::placeholder { color: var(--text-dim); }

.notify-input:focus {
  outline: none;
  border-color: rgba(108,111,255,0.5);
}

/* ── Responsive ────────────────────────────────────────── */
@media (max-width: 768px) {
  .navbar__nav { display: none; }

  .about__grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .about__visual { order: -1; }

  .values__grid { grid-template-columns: 1fr; }

  .footer__inner { flex-direction: column; gap: 32px; }

  .footer__bottom { flex-direction: column; align-items: flex-start; gap: 8px; }

  .hero { padding: 72px 0 60px; }

  .section { padding: 64px 0; }
}

@media (max-width: 480px) {
  .notify-form { flex-direction: column; }
  .cta__box { padding: 48px 24px; }
}