:root {
  --bg: #06060a;
  --surface: rgba(255, 255, 255, 0.03);
  --surface-hover: rgba(255, 255, 255, 0.06);
  --blue: #4a9eff;
  --purple: #a78bfa;
  --pink: #f472b6;
  --text: #eee;
  --muted: #666;
  --border: rgba(255, 255, 255, 0.06);
  --max-w: 720px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Helvetica Neue', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  position: relative;
}

.container { max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }

/* ===================== BACKGROUND ===================== */
.bg-grid {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 64px 64px;
  pointer-events: none;
  z-index: 0;
}

.bg-glow {
  position: fixed;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.12;
  pointer-events: none;
  z-index: 0;
  transition: transform 0.3s ease-out;
}

.bg-glow-1 {
  background: var(--blue);
  top: -10%;
  right: -5%;
  animation: float 8s ease-in-out infinite;
}

.bg-glow-2 {
  background: var(--purple);
  bottom: 10%;
  left: -10%;
  animation: float 10s ease-in-out infinite reverse;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0); }
  33% { transform: translate(20px, -30px); }
  66% { transform: translate(-15px, 20px); }
}

main { position: relative; z-index: 1; }

/* ===================== HERO ===================== */
.hero {
  padding: 80px 0 60px;
  text-align: center;
}

/* Animated logo */
.hero-logo {
  margin-bottom: 28px;
  display: flex;
  justify-content: center;
  gap: 2px;
}

.hero-logo-letter {
  display: inline-block;
  font-size: clamp(3.5rem, 10vw, 5.5rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, #fff 0%, var(--blue) 40%, var(--purple) 70%, var(--pink) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  opacity: 0;
  transform: translateY(40px) scale(0.8);
  animation: letterReveal 0.6s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

.hero-logo-letter:nth-child(1) { animation-delay: 0.05s; }
.hero-logo-letter:nth-child(2) { animation-delay: 0.12s; }
.hero-logo-letter:nth-child(3) { animation-delay: 0.19s; }
.hero-logo-letter:nth-child(4) { animation-delay: 0.26s; }
.hero-logo-letter:nth-child(5) { animation-delay: 0.33s; }
.hero-logo-letter:nth-child(6) { animation-delay: 0.40s; }

@keyframes letterReveal {
  0% { opacity: 0; transform: translateY(40px) scale(0.8); filter: blur(8px); }
  60% { filter: blur(0); }
  100% { opacity: 1; transform: translateY(0) scale(1); filter: blur(0); }
}

.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  border-radius: 100px;
  border: 1px solid var(--border);
  background: var(--surface);
  font-size: 0.8rem;
  color: var(--muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 28px;
  animation: fadeDown 0.6s ease-out 0.6s both;
}

.hero h1 {
  font-size: clamp(2.2rem, 6vw, 3.4rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.1;
}

.hero-line {
  display: block;
  animation: fadeUp 0.7s ease-out both;
  animation-delay: 0.7s;
}

.hero-line:nth-child(2) { animation-delay: 0.85s; }

.hero-accent {
  background: linear-gradient(135deg, var(--blue) 0%, var(--purple) 60%, var(--pink) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  max-width: 440px;
  margin: 24px auto 36px;
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.7;
  animation: fadeUp 0.7s ease-out 1s both;
}

.btn-appstore {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 12px;
  background: #fff;
  color: #000;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  transition: all 0.25s ease;
  animation: fadeUp 0.7s ease-out 1.15s both;
}

.btn-appstore:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(255,255,255,0.1);
}

/* ===================== FEATURES ===================== */
.features { padding: 20px 0 60px; }

.features-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.feature-card {
  position: relative;
  padding: 28px 24px;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: var(--surface);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  overflow: hidden;

  /* animation setup */
  opacity: 0;
  transform: translateY(30px);
}

.feature-card.visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.feature-card:nth-child(2).visible { transition-delay: 0.08s; }
.feature-card:nth-child(3).visible { transition-delay: 0.16s; }
.feature-card:nth-child(4).visible { transition-delay: 0.24s; }

/* Gradient border on hover */
.feature-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 16px;
  padding: 1px;
  background: linear-gradient(135deg, var(--blue), var(--purple), transparent, transparent);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.4s ease;
}

.feature-card:hover::before { opacity: 1; }

.feature-card:hover {
  background: var(--surface-hover);
  transform: translateY(-4px);
}

/* Glow on hover */
.feature-card::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at center, var(--blue), transparent 60%);
  opacity: 0;
  transition: opacity 0.4s ease;
  pointer-events: none;
}

.feature-card:hover::after { opacity: 0.04; }

.feature-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  background: rgba(74, 158, 255, 0.1);
  color: var(--blue);
}

.feature-icon--alarm { background: rgba(244, 114, 182, 0.1); color: var(--pink); }
.feature-icon--time { background: rgba(167, 139, 250, 0.1); color: var(--purple); }
.feature-icon--control { background: rgba(74, 158, 255, 0.1); color: var(--blue); }

.feature-card h3 {
  font-size: 1rem;
  font-weight: 650;
  margin-bottom: 6px;
  letter-spacing: -0.01em;
}

.feature-card p {
  font-size: 0.88rem;
  color: var(--muted);
  line-height: 1.55;
}

/* ===================== STEPS ===================== */
.steps {
  padding: 40px 0 60px;
}

.section-title {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  text-align: center;
  margin-bottom: 40px;
  opacity: 0;
  transform: translateY(20px);
}

.section-title.visible {
  opacity: 1;
  transform: translateY(0);
  transition: all 0.6s ease;
}

.steps-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
  max-width: 480px;
  margin: 0 auto;
}

.step {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  padding: 24px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--surface);
  transition: all 0.3s ease;

  opacity: 0;
  transform: translateX(-30px);
}

.step.visible {
  opacity: 1;
  transform: translateX(0);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.step:nth-child(2).visible { transition-delay: 0.1s; }
.step:nth-child(3).visible { transition-delay: 0.2s; }

.step:hover {
  background: var(--surface-hover);
  border-color: rgba(74, 158, 255, 0.12);
}

.step-num {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
  background: linear-gradient(135deg, var(--blue), var(--purple));
  color: #fff;
}

.step-text h3 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.step-text p {
  font-size: 0.85rem;
  color: var(--muted);
  line-height: 1.55;
}

/* ===================== FOOTER ===================== */
footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--border);
  padding: 28px 0;
  margin-top: 40px;
  text-align: center;
}

footer nav {
  display: flex;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
}

footer a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.85rem;
  transition: color 0.2s ease;
}

footer a:hover { color: var(--blue); }

footer .copyright {
  color: var(--muted);
  font-size: 0.75rem;
  margin-top: 14px;
  opacity: 0.5;
}

/* ===================== LEGAL ===================== */
.legal {
  position: relative;
  z-index: 1;
  padding: 48px 0;
}

.legal h1 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

.legal h2 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-top: 32px;
  margin-bottom: 12px;
}

.legal p, .legal li {
  color: var(--muted);
  margin-bottom: 12px;
  font-size: 0.95rem;
}

.legal ul { padding-left: 24px; }

.legal a { color: var(--blue); text-decoration: none; transition: opacity 0.2s; }
.legal a:hover { opacity: 0.8; }

.legal .back-link {
  display: inline-block;
  margin-bottom: 24px;
  color: var(--muted);
  font-size: 0.85rem;
  text-decoration: none;
  transition: color 0.2s;
}

.legal .back-link:hover { color: var(--blue); }

/* ===================== ANIMATIONS ===================== */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeDown {
  from { opacity: 0; transform: translateY(-12px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===================== RESPONSIVE ===================== */
@media (max-width: 600px) {
  .hero { padding: 64px 0 40px; }
  .hero h1 { font-size: 2rem; }
  .hero-desc { font-size: 0.95rem; }
  .features-grid { grid-template-columns: 1fr; }
  .feature-card { padding: 22px 20px; }
  .step { padding: 18px; }
  footer nav { gap: 16px; }
  .bg-glow { width: 300px; height: 300px; }
}