:root {
  --bg: #0b0f1a;
  --surface: #131929;
  --surface-2: #1a2235;
  --border: #1e2d45;
  --accent: #4f8ef7;
  --accent-hover: #6ba3ff;
  --accent-dim: rgba(79, 142, 247, 0.12);
  --text: #e8edf5;
  --text-muted: #7a8ba8;
  --text-subtle: #4a5a72;
  --success: #34d399;
  --error: #f87171;
  --warning: #fbbf24;
  --radius: 10px;
  --radius-sm: 6px;
  --shadow: 0 4px 24px rgba(0,0,0,0.4);
}

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

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

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

/* NAV */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11, 15, 26, 0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  padding: 0 2rem;
}

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.3px;
}

.logo svg { flex-shrink: 0; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: color 0.15s;
}

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

.nav-actions { display: flex; gap: 0.75rem; align-items: center; }

/* BUTTONS */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.55rem 1.25rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  border: none;
  transition: all 0.15s;
  line-height: 1;
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover { background: var(--accent-hover); color: #fff; }

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
}
.btn-ghost:hover { color: var(--text); border-color: var(--text-subtle); }

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

.btn-lg {
  padding: 0.8rem 2rem;
  font-size: 1rem;
  border-radius: var(--radius);
}

.btn:disabled, .btn-disabled {
  opacity: 0.4;
  cursor: not-allowed;
  pointer-events: none;
}

/* HERO */
.hero {
  max-width: 1100px;
  margin: 0 auto;
  padding: 7rem 2rem 5rem;
  text-align: center;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--accent-dim);
  border: 1px solid rgba(79,142,247,0.25);
  color: var(--accent);
  border-radius: 999px;
  padding: 0.3rem 0.9rem;
  font-size: 0.8rem;
  font-weight: 500;
  margin-bottom: 1.5rem;
}

.hero h1 {
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -1.5px;
  max-width: 780px;
  margin: 0 auto 1.5rem;
  background: linear-gradient(135deg, #ffffff 40%, #7fa8f5 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 560px;
  margin: 0 auto 2.5rem;
}

.hero-actions { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* FEATURES */
.features {
  max-width: 1100px;
  margin: 0 auto;
  padding: 5rem 2rem;
}

.section-label {
  text-align: center;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}

.section-title {
  text-align: center;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
  letter-spacing: -0.5px;
  margin-bottom: 0.75rem;
}

.section-sub {
  text-align: center;
  color: var(--text-muted);
  max-width: 480px;
  margin: 0 auto 3.5rem;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
}

.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  transition: border-color 0.2s;
}

.feature-card:hover { border-color: var(--text-subtle); }

.feature-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--accent-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
}

.feature-card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.feature-card p {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* SECURITY STRIP */
.security-strip {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  padding: 3.5rem 2rem;
  margin: 2rem 0;
}

.security-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.security-inner h2 {
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.5px;
  margin-bottom: 1rem;
}

.security-inner p { color: var(--text-muted); margin-bottom: 1.5rem; }

.check-list { list-style: none; display: flex; flex-direction: column; gap: 0.75rem; }

.check-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.check-list li span { color: var(--success); margin-top: 2px; flex-shrink: 0; }

.security-visual {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.enc-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.enc-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--success);
  flex-shrink: 0;
  box-shadow: 0 0 8px var(--success);
}

.enc-bar {
  flex: 1;
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  overflow: hidden;
}

.enc-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--success));
  border-radius: 2px;
}

/* CTA */
.cta-section {
  max-width: 700px;
  margin: 0 auto;
  padding: 6rem 2rem;
  text-align: center;
}

.cta-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 3.5rem 2.5rem;
}

.cta-card h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
  letter-spacing: -0.5px;
  margin-bottom: 0.75rem;
}

.cta-card p { color: var(--text-muted); margin-bottom: 2rem; }

/* FOOTER */
footer {
  border-top: 1px solid var(--border);
  padding: 3rem 2rem;
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 2rem;
  flex-wrap: wrap;
}

.footer-brand p {
  font-size: 0.8rem;
  color: var(--text-subtle);
  margin-top: 0.5rem;
  max-width: 220px;
}

.footer-cols { display: flex; gap: 4rem; }

.footer-col h4 {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.8px;
  margin-bottom: 0.75rem;
}

.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 0.5rem; }

.footer-col a {
  font-size: 0.85rem;
  color: var(--text-subtle);
  transition: color 0.15s;
}

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

.footer-bottom {
  max-width: 1100px;
  margin: 2rem auto 0;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-bottom p { font-size: 0.8rem; color: var(--text-subtle); }

/* AUTH PAGES */
.auth-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.auth-main {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 3rem 1.5rem;
}

.auth-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 2.5rem;
  width: 100%;
  max-width: 420px;
  box-shadow: var(--shadow);
}

.auth-card h1 {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.4px;
  margin-bottom: 0.4rem;
}

.auth-card .subtitle {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 2rem;
}

/* FORMS */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-bottom: 1rem;
}

label {
  font-size: 0.825rem;
  font-weight: 500;
  color: var(--text-muted);
}

input[type="email"],
input[type="password"],
input[type="text"] {
  width: 100%;
  padding: 0.7rem 0.9rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 0.9rem;
  transition: border-color 0.15s, box-shadow 0.15s;
  outline: none;
  font-family: inherit;
}

input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(79, 142, 247, 0.15);
}

input.error { border-color: var(--error); }

.form-actions { margin-top: 1.5rem; display: flex; flex-direction: column; gap: 0.75rem; }

.btn-block { width: 100%; }

/* ALERTS */
.alert {
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  font-size: 0.875rem;
  display: none;
  align-items: flex-start;
  gap: 0.6rem;
  margin-bottom: 1.25rem;
}

.alert.show { display: flex; }

.alert-error { background: rgba(248, 113, 113, 0.1); border: 1px solid rgba(248,113,113,0.25); color: #fca5a5; }
.alert-success { background: rgba(52, 211, 153, 0.1); border: 1px solid rgba(52,211,153,0.25); color: #6ee7b7; }
.alert-info { background: var(--accent-dim); border: 1px solid rgba(79,142,247,0.25); color: #93bbfb; }

.auth-footer {
  margin-top: 1.75rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.auth-footer a { color: var(--accent); }

.form-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.form-row label { margin: 0; }

.link-sm { font-size: 0.825rem; color: var(--text-muted); }
.link-sm:hover { color: var(--accent); }

/* DISABLED STATE */
.field-disabled {
  opacity: 0.45;
  pointer-events: none;
  user-select: none;
}

.closed-banner {
  background: rgba(251, 191, 36, 0.08);
  border: 1px solid rgba(251,191,36,0.2);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  font-size: 0.85rem;
  color: #fcd34d;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

/* SPINNER */
.spinner {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  display: none;
}

.loading .spinner { display: inline-block; }
.loading .btn-text { display: none; }

@keyframes spin { to { transform: rotate(360deg); } }

/* WAITLIST */
.waitlist-section {
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.waitlist-section h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
}

.waitlist-section p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.waitlist-form { display: flex; gap: 0.5rem; }
.waitlist-form input { flex: 1; }

/* RESPONSIVE */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .security-inner { grid-template-columns: 1fr; gap: 2rem; }
  .footer-cols { gap: 2rem; }
  .footer-inner { flex-direction: column; }
}