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

:root {
  --bg: #0a0a0f;
  --bg-card: #12121a;
  --bg-card-hover: #181825;
  --border: #1e1e2e;
  --text: #e5e5e5;
  --text-muted: #888;
  --text-dim: #555;
  --primary: #6c5ce7;
  --primary-hover: #5a4bd4;
  --primary-glow: rgba(108, 92, 231, 0.15);
  --accent: #e74c3c;
  --success: #2ecc71;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

.hidden { display: none !important; }

/* ====== Typography ====== */
h1, h2, h3 { color: #fff; line-height: 1.2; }
h1 { font-size: clamp(2.5rem, 5vw, 4rem); font-weight: 800; letter-spacing: -0.02em; }
h2 { font-size: clamp(1.8rem, 3vw, 2.5rem); font-weight: 700; }
h3 { font-size: 1.2rem; font-weight: 600; }

.gradient-text {
  background: linear-gradient(135deg, var(--primary), #a78bfa, #ec4899);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-header {
  text-align: center;
  max-width: 600px;
  margin: 0 auto 48px;
}
.section-header p {
  color: var(--text-muted);
  margin-top: 12px;
  font-size: 1.1rem;
}

/* ====== Buttons ====== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 500;
  border: none;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
  font-family: inherit;
}
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover:not(:disabled) { background: var(--primary-hover); transform: translateY(-1px); }

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

.btn-sm { padding: 8px 16px; font-size: 13px; }
.btn-lg { padding: 14px 28px; font-size: 16px; }
.btn-full { width: 100%; }

.btn-chrome { gap: 10px; }
.btn-chrome svg { flex-shrink: 0; }

/* ====== Nav ====== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

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

.nav-logo {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}
.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: color 0.2s;
}
.nav-links a:hover { color: #fff; }

.nav-mobile {
  display: none;
  background: none;
  border: none;
  color: var(--text);
  font-size: 24px;
  cursor: pointer;
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-mobile { display: block; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: 16px 24px;
    gap: 16px;
  }
}

/* ====== Hero ====== */
.hero {
  padding: 160px 0 80px;
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  background: var(--primary-glow);
  border: 1px solid rgba(108, 92, 231, 0.3);
  border-radius: 100px;
  font-size: 14px;
  font-weight: 500;
  color: var(--primary);
  margin-bottom: 24px;
}

.hero-sub {
  max-width: 560px;
  margin: 20px auto 0;
  font-size: 1.15rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-top: 36px;
  flex-wrap: wrap;
}

.hero-note {
  margin-top: 16px;
  font-size: 13px;
  color: var(--text-dim);
}

/* ====== Social Proof ====== */
.social-proof {
  padding: 40px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.proof-items {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 48px;
  flex-wrap: wrap;
}

.proof-item { text-align: center; }
.proof-number { display: block; font-size: 2rem; font-weight: 800; color: #fff; }
.proof-label { font-size: 14px; color: var(--text-muted); }
.proof-divider { width: 1px; height: 40px; background: var(--border); }

@media (max-width: 600px) {
  .proof-divider { display: none; }
  .proof-items { gap: 32px; }
}

/* ====== Demo ====== */
.demo {
  padding: 100px 0;
}

.demo-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
}

.demo-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

@media (max-width: 768px) {
  .demo-grid { grid-template-columns: 1fr; }
}

.demo-input label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
}

.demo-input textarea {
  width: 100%;
  padding: 14px 16px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: inherit;
  font-size: 14px;
  line-height: 1.6;
  resize: vertical;
  transition: border-color 0.2s;
}
.demo-input textarea:focus {
  outline: none;
  border-color: var(--primary);
}
.demo-input textarea::placeholder { color: var(--text-dim); }

.demo-actions {
  display: flex;
  gap: 12px;
  margin-top: 24px;
  flex-wrap: wrap;
}

.demo-loading {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 24px;
  padding: 16px;
  color: var(--text-muted);
  font-size: 14px;
}

.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  flex-shrink: 0;
}
@keyframes spin { to { transform: rotate(360deg); } }

.demo-result {
  margin-top: 24px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.demo-result-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}
.demo-result-header h3 { font-size: 14px; color: var(--text-muted); }

.demo-result-text {
  padding: 20px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text);
  white-space: pre-wrap;
  max-height: 400px;
  overflow-y: auto;
}

.demo-error {
  margin-top: 16px;
  padding: 12px 16px;
  background: rgba(231, 76, 60, 0.1);
  border: 1px solid rgba(231, 76, 60, 0.3);
  border-radius: var(--radius-sm);
  color: var(--accent);
  font-size: 14px;
}

.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary);
  color: #fff;
  padding: 10px 24px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  animation: fadeInOut 1.5s ease;
  z-index: 200;
}
@keyframes fadeInOut {
  0% { opacity: 0; transform: translateX(-50%) translateY(8px); }
  15% { opacity: 1; transform: translateX(-50%) translateY(0); }
  85% { opacity: 1; }
  100% { opacity: 0; transform: translateX(-50%) translateY(-8px); }
}

/* ====== How it works ====== */
.how {
  padding: 100px 0;
  background: var(--bg-card);
}

.steps {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 24px;
}

.step {
  flex: 1;
  max-width: 280px;
  text-align: center;
  padding: 32px 24px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  position: relative;
}

.step-number {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  width: 28px;
  height: 28px;
  background: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  color: #fff;
}

.step-icon { font-size: 36px; margin-bottom: 16px; }
.step h3 { margin-bottom: 8px; }
.step p { font-size: 14px; color: var(--text-muted); line-height: 1.6; }

.step-arrow {
  color: var(--text-dim);
  font-size: 24px;
  margin-top: 60px;
  flex-shrink: 0;
}

@media (max-width: 768px) {
  .steps { flex-direction: column; align-items: center; }
  .step-arrow { transform: rotate(90deg); margin: 0; }
  .step { max-width: 100%; }
}

/* ====== Features ====== */
.features { padding: 100px 0; }

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.feature-card {
  padding: 28px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color 0.2s, transform 0.2s;
}
.feature-card:hover {
  border-color: rgba(108, 92, 231, 0.3);
  transform: translateY(-2px);
}

.feature-icon { font-size: 28px; margin-bottom: 14px; }
.feature-card h3 { margin-bottom: 8px; }
.feature-card p { font-size: 14px; color: var(--text-muted); line-height: 1.6; }

@media (max-width: 768px) {
  .feature-grid { grid-template-columns: 1fr; }
}

/* ====== Pricing ====== */
.pricing { padding: 100px 0; background: var(--bg-card); }

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  max-width: 700px;
  margin: 0 auto;
}

.pricing-card {
  padding: 36px 32px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  text-align: center;
  position: relative;
}

.pricing-card-featured {
  border-color: var(--primary);
  box-shadow: 0 0 40px var(--primary-glow);
}

.pricing-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  padding: 4px 16px;
  background: var(--primary);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  border-radius: 100px;
  white-space: nowrap;
}

.pricing-tier {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 8px;
}

.pricing-price {
  font-size: 3rem;
  font-weight: 800;
  color: #fff;
}

.pricing-period {
  font-size: 14px;
  color: var(--text-dim);
  margin-bottom: 24px;
}

.pricing-features {
  list-style: none;
  text-align: left;
  margin-bottom: 24px;
}

.pricing-features li {
  padding: 8px 0;
  font-size: 14px;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
}
.pricing-features li:last-child { border-bottom: none; }
.pricing-features li strong { color: #fff; }

@media (max-width: 600px) {
  .pricing-grid { grid-template-columns: 1fr; }
}

/* ====== Download ====== */
.download { padding: 100px 0; }

.download-card {
  text-align: center;
  padding: 60px 40px;
  background: linear-gradient(135deg, rgba(108, 92, 231, 0.1), rgba(168, 85, 247, 0.05));
  border: 1px solid rgba(108, 92, 231, 0.2);
  border-radius: var(--radius-lg);
}
.download-card h2 { margin-bottom: 12px; }
.download-card > p { color: var(--text-muted); margin-bottom: 28px; }

.download-actions { margin-bottom: 16px; }
.download-note { font-size: 13px; color: var(--text-dim); }
.download-note a { color: var(--primary); text-decoration: none; }
.download-note a:hover { text-decoration: underline; }

/* ====== Notify ====== */
.notify { padding: 80px 0; }

.notify-form {
  display: flex;
  gap: 12px;
  max-width: 440px;
  margin: 0 auto;
}

.notify-form input {
  flex: 1;
  padding: 12px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: inherit;
  font-size: 15px;
}
.notify-form input:focus {
  outline: none;
  border-color: var(--primary);
}
.notify-form input::placeholder { color: var(--text-dim); }

.notify-success {
  text-align: center;
  margin-top: 16px;
  font-size: 14px;
  color: var(--success);
}

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

/* ====== Story ====== */
.story {
  padding: 100px 0;
  background: var(--bg-card);
}

.story-content {
  max-width: 640px;
  margin: 0 auto;
}
.story-content h2 { margin-bottom: 24px; }
.story-content p {
  color: var(--text-muted);
  margin-bottom: 16px;
  font-size: 1.05rem;
  line-height: 1.8;
}
.story-signature {
  color: #fff !important;
  font-weight: 600;
  font-style: italic;
  margin-top: 24px;
}

/* ====== Footer ====== */
.footer {
  padding: 40px 0;
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
}

.footer-brand span {
  font-weight: 700;
  font-size: 16px;
  color: #fff;
}
.footer-brand p {
  font-size: 13px;
  color: var(--text-dim);
  margin-top: 4px;
}

.footer-links {
  display: flex;
  gap: 24px;
}
.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 14px;
}
.footer-links a:hover { color: #fff; }

.footer-legal {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 13px;
  color: var(--text-dim);
}
.footer-legal a { color: var(--text-dim); text-decoration: none; }
.footer-legal a:hover { color: var(--text-muted); }

@media (max-width: 768px) {
  .footer-inner { flex-direction: column; text-align: center; }
  .footer-links { justify-content: center; }
  .footer-legal { flex-direction: column; }
}

/* ====== Scrollbar ====== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }