:root {
  --bg: #0a0a14;
  --surface: #121420;
  --card: #181b2a;
  --border: #252840;
  --accent: #7c6ff0;
  --accent-hover: #6a5de0;
  --accent-soft: rgba(124,111,240,0.12);
  --text: #edecf2;
  --text2: #8a8a9a;
  --text3: #5a5a6a;
  --green: #34d399;
  --red: #f87171;
  --radius: 12px;
  --radius-sm: 8px;
  --max-width: 1100px;
}

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

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

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Nav */
.nav {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 100;
}
.nav-inner {
  max-width: var(--max-width); margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 24px;
}
.nav-logo { display: flex; align-items: center; gap: 10px; font-size: 18px; font-weight: 700; color: var(--text); text-decoration: none; }
.nav-logo:hover { text-decoration: none; }
.nav-links { display: flex; align-items: center; gap: 24px; }
.nav-links a { color: var(--text2); font-size: 14px; font-weight: 500; }
.nav-links a:hover { color: var(--text); text-decoration: none; }
.nav-links a.active { color: var(--accent); }
.lang-select {
  background: var(--card); border: 1px solid var(--border); color: var(--text);
  padding: 4px 8px; border-radius: 6px; font-size: 13px; cursor: pointer;
  outline: none; appearance: auto;
}
.lang-select:hover { border-color: var(--accent); }
.lang-select:focus { border-color: var(--accent); box-shadow: 0 0 0 2px var(--accent-soft); }

/* Hero */
.hero {
  text-align: center; padding: 80px 24px 60px; max-width: 700px; margin: 0 auto;
}
.hero h1 { font-size: 42px; font-weight: 800; letter-spacing: -0.5px; line-height: 1.2; margin-bottom: 16px; }
.hero-sub { font-size: 18px; color: var(--text2); line-height: 1.7; margin-bottom: 32px; }
.hero-cta { display: flex; flex-direction: column; align-items: center; gap: 12px; }
.hero-hint { font-size: 13px; color: var(--text3); }

/* Buttons */
.btn-primary {
  display: inline-block; padding: 14px 36px; border-radius: 999px;
  background: var(--accent); color: #fff; font-size: 16px; font-weight: 600;
  border: none; cursor: pointer; text-decoration: none; transition: all 0.15s;
}
.btn-primary:hover { background: var(--accent-hover); transform: translateY(-1px); text-decoration: none; }
.btn-primary:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }
.btn-outline { background: transparent; border: 1.5px solid var(--accent); color: var(--accent); }
.btn-outline:hover { background: var(--accent-soft); }

/* Features */
.features { padding: 60px 24px; max-width: var(--max-width); margin: 0 auto; }
.features h2 { text-align: center; font-size: 28px; margin-bottom: 40px; }
.feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; }
.feature-card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 32px 24px; text-align: center;
  transition: border-color 0.15s;
}
.feature-card:hover { border-color: var(--accent); }
.feature-icon { font-size: 40px; margin-bottom: 16px; }
.feature-card h3 { font-size: 18px; margin-bottom: 8px; }
.feature-card p { font-size: 14px; color: var(--text2); line-height: 1.6; }

/* Install Section */
.install {
  padding: 60px 24px; max-width: var(--max-width); margin: 0 auto;
  background: var(--surface); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
}
.install h2 { text-align: center; font-size: 28px; margin-bottom: 8px; }
.install > p { text-align: center; color: var(--text2); margin-bottom: 40px; font-size: 16px; }
.install-options { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; }
.install-card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 32px 24px;
  display: flex; flex-direction: column; text-align: center;
}
.install-icon { font-size: 40px; margin-bottom: 16px; }
.install-card h3 { font-size: 18px; margin-bottom: 8px; }
.install-card p { font-size: 14px; color: var(--text2); line-height: 1.6; margin-bottom: 16px; }
.download-btn { margin-bottom: 16px; }
.install-card .download-btn { font-size: 14px; padding: 12px 24px; }
.install-steps { text-align: left; }
.install-steps ol { padding-left: 20px; }
.install-steps li { font-size: 13px; color: var(--text2); padding: 4px 0; }
.install-steps code { background: var(--accent-soft); color: var(--accent); padding: 1px 6px; border-radius: 4px; font-size: 12px; }
.install-note { text-align: center; margin-top: 32px; font-size: 13px; color: var(--text3); }

/* Nav install button */
.nav-install-btn {
  background: var(--accent); color: #fff !important; padding: 6px 16px; border-radius: 999px;
  font-size: 13px !important; font-weight: 600;
}
.nav-install-btn:hover { background: var(--accent-hover); text-decoration: none !important; }

/* CTA */
.cta-section { text-align: center; padding: 80px 24px; background: var(--surface); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.cta-section h2 { font-size: 28px; margin-bottom: 8px; }
.cta-section p { color: var(--text2); margin-bottom: 24px; font-size: 16px; }

/* Pricing */
.pricing-hero { text-align: center; padding: 60px 24px 40px; }
.pricing-hero h1 { font-size: 36px; margin-bottom: 8px; }
.pricing-hero p { color: var(--text2); font-size: 16px; }
.pricing-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px; max-width: 960px; margin: 0 auto; padding: 0 24px 60px;
}
.pricing-card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 32px 24px;
  display: flex; flex-direction: column; position: relative;
}
.pricing-card.featured { border-color: var(--accent); transform: scale(1.02); }
.pricing-badge {
  position: absolute; top: -12px; left: 50%; transform: translateX(-50%);
  background: var(--accent); color: #fff; padding: 4px 16px; border-radius: 999px;
  font-size: 12px; font-weight: 600;
}
.pricing-header { text-align: center; margin-bottom: 24px; }
.pricing-header h2 { font-size: 20px; margin-bottom: 8px; }
.pricing-price { font-size: 48px; font-weight: 800; line-height: 1; }
.currency { font-size: 24px; vertical-align: super; }
.period { font-size: 16px; font-weight: 400; color: var(--text3); }
.pricing-save { font-size: 13px; color: var(--green); margin-top: 4px; }
.pricing-features { list-style: none; flex: 1; margin-bottom: 24px; }
.pricing-features li { padding: 8px 0; border-bottom: 1px solid var(--border); font-size: 14px; color: var(--text2); }
.pricing-features li:last-child { border-bottom: none; }
.pricing-action { text-align: center; }
.pricing-current { color: var(--text3); font-size: 13px; }
.pricing-action .btn-primary { width: 100%; }

/* Compare Table */
.compare { padding: 60px 24px; max-width: 700px; margin: 0 auto; }
.compare h2 { text-align: center; font-size: 24px; margin-bottom: 24px; }
.compare-table { width: 100%; border-collapse: collapse; }
.compare-table th, .compare-table td { padding: 12px 16px; text-align: left; border-bottom: 1px solid var(--border); }
.compare-table th { font-size: 14px; color: var(--text3); font-weight: 600; }
.compare-table td { font-size: 14px; }
.compare-table tbody tr:hover { background: var(--card); }

/* Footer */
.footer { border-top: 1px solid var(--border); padding: 40px 24px; background: var(--surface); }
.footer-inner { max-width: var(--max-width); margin: 0 auto; display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 16px; }
.footer-brand { display: flex; flex-direction: column; gap: 2px; }
.footer-brand strong { color: var(--text); }
.footer-brand span { font-size: 12px; color: var(--text3); }
.footer-links { display: flex; gap: 16px; }
.footer-links a { font-size: 13px; color: var(--text3); }
.footer-copy { font-size: 12px; color: var(--text3); }

/* Success */
.success-page { display: flex; align-items: center; justify-content: center; min-height: 80vh; }
.success-card { text-align: center; max-width: 480px; padding: 40px; }
.success-icon { font-size: 64px; margin-bottom: 16px; }
.success-card h1 { font-size: 28px; margin-bottom: 12px; }
.success-card p { color: var(--text2); font-size: 16px; margin-bottom: 24px; }
.success-hint { font-size: 13px; color: var(--text3); }

/* Responsive */
@media (max-width: 768px) {
  .hero h1 { font-size: 28px; }
  .hero-sub { font-size: 15px; }
  .pricing-grid { grid-template-columns: 1fr; }
  .pricing-card.featured { transform: none; }
  .nav-inner { padding: 10px 16px; }
}

/* Login Dialog Overlay */
.login-overlay {
  position: fixed; top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.6); z-index: 200;
  display: flex; align-items: center; justify-content: center;
}
.login-dialog {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 32px 28px; max-width: 400px; width: 90%;
  position: relative; text-align: center;
}
.login-dialog h2 { font-size: 20px; margin-bottom: 4px; }
.login-dialog-close {
  position: absolute; top: 10px; right: 14px;
  background: none; border: none; color: var(--text3); font-size: 24px;
  cursor: pointer; line-height: 1;
}
.login-dialog-close:hover { color: var(--text); }
.login-dialog-desc { color: var(--text2); font-size: 14px; margin-bottom: 20px; }
.login-form { display: flex; flex-direction: column; gap: 10px; }
.login-input {
  background: var(--card); border: 1px solid var(--border); color: var(--text);
  padding: 10px 14px; border-radius: 8px; font-size: 14px; outline: none;
  width: 100%;
}
.login-input:focus { border-color: var(--accent); box-shadow: 0 0 0 2px var(--accent-soft); }
.login-input::placeholder { color: var(--text3); }
.login-submit { width: 100%; }
.login-error { color: var(--red); font-size: 13px; display: none; }

/* User status bar */
.user-status-bar {
  max-width: 960px; margin: 0 auto 24px; padding: 10px 18px;
  background: var(--card); border: 1px solid var(--border);
  border-radius: 8px;
}
.user-status-row {
  display: flex; align-items: center; gap: 12px; font-size: 13px;
  flex-wrap: wrap;
}
.user-status-badge {
  padding: 2px 10px; border-radius: 999px; font-size: 11px; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.5px;
}
.user-status-badge.free { background: var(--accent-soft); color: var(--accent); }
.user-status-badge.pro { background: var(--accent); color: #fff; }
.user-status-email { color: var(--text); font-weight: 500; }
.user-status-info { color: var(--text2); }
.user-status-bar .btn-logout {
  margin-left: auto; background: transparent; border: 1px solid var(--border);
  color: var(--text3); padding: 4px 12px; border-radius: 6px; font-size: 12px;
  cursor: pointer; white-space: nowrap;
}
.user-status-bar .btn-logout:hover { border-color: var(--red); color: var(--red); }

/* Pro notice */
.pro-notice {
  max-width: 960px; margin: 0 auto 16px; padding: 12px 20px;
  background: var(--accent-soft); border: 1px solid var(--accent);
  border-radius: 8px; text-align: center; font-size: 14px; color: var(--text);
}

/* Current plan highlight */
.pricing-card.current-plan {
  border-color: var(--accent);
  box-shadow: 0 0 12px rgba(124,111,240,0.15);
}