/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --bg: #0b0f19;
  --bg-alt: #111827;
  --bg-card: #1a2234;
  --bg-hover: #243044;
  --text: #f1f5f9;
  --text-muted: #94a3b8;
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --primary-glow: rgba(99, 102, 241, 0.35);
  --accent: #22d3ee;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --border: #2d3748;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(0,0,0,0.4);
  --font: 'Inter', system-ui, -apple-system, sans-serif;
  --max-w: 1140px;
}
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
a { color: inherit; text-decoration: none; }
button, input, select, textarea {
  font-family: inherit;
  font-size: 1rem;
  border: none;
  outline: none;
}
img { max-width: 100%; }
.container { width: 100%; max-width: var(--max-w); margin: 0 auto; padding: 0 1.25rem; }

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  border: 1px solid transparent;
  white-space: nowrap;
}
.btn-primary {
  background: var(--primary);
  color: white;
  box-shadow: 0 0 0 0 var(--primary-glow);
}
.btn-primary:hover {
  background: var(--primary-hover);
  box-shadow: 0 0 20px var(--primary-glow);
  transform: translateY(-1px);
}
.btn-outline {
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}
.btn-outline:hover {
  background: var(--bg-hover);
  border-color: var(--primary);
}
.btn-ghost {
  background: transparent;
  color: var(--text-muted);
}
.btn-ghost:hover { color: var(--text); background: var(--bg-hover); }
.btn-lg { padding: 0.9rem 1.75rem; font-size: 1.05rem; border-radius: var(--radius); }
.btn-sm { padding: 0.35rem 0.75rem; font-size: 0.85rem; }
.btn-block { width: 100%; }

/* ===== NAV ===== */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11, 15, 25, 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;
}
.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 800;
  font-size: 1.2rem;
}
.logo-icon { font-size: 1.4rem; }
.nav-links {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.nav-link {
  padding: 0.5rem 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: color 0.2s;
}
.nav-link:hover { color: var(--text); }
.user-menu { position: relative; }
#userBtn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
#userAvatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 700;
}
.badge {
  font-size: 0.7rem;
  padding: 0.15rem 0.45rem;
  border-radius: 999px;
  background: var(--primary);
  color: white;
  font-weight: 600;
  text-transform: uppercase;
}
.dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  min-width: 180px;
  box-shadow: var(--shadow);
  display: none;
  overflow: hidden;
  z-index: 50;
}
.dropdown.open { display: block; }
.dropdown a {
  display: block;
  padding: 0.75rem 1rem;
  color: var(--text-muted);
  transition: all 0.15s;
}
.dropdown a:hover {
  background: var(--bg-hover);
  color: var(--text);
}
.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  cursor: pointer;
  padding: 4px;
}
.mobile-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: 0.2s;
}

/* ===== HERO ===== */
.hero {
  padding: 5rem 0 4rem;
  background: radial-gradient(ellipse 80% 60% at 50% -20%, rgba(99,102,241,0.25), transparent);
}
.hero-inner {
  text-align: center;
  max-width: 780px;
  margin: 0 auto;
}
.hero-badge {
  display: inline-block;
  padding: 0.4rem 1rem;
  background: rgba(99,102,241,0.15);
  border: 1px solid rgba(99,102,241,0.3);
  border-radius: 999px;
  font-size: 0.875rem;
  font-weight: 500;
  color: #a5b4fc;
  margin-bottom: 1.5rem;
}
.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 1.25rem;
  letter-spacing: -0.02em;
}
.gradient-text {
  background: linear-gradient(135deg, #818cf8, #22d3ee);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-sub {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 560px;
  margin: 0 auto 2rem;
}
.hero-cta {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 3rem;
}
.hero-stats {
  display: flex;
  justify-content: center;
  gap: 3rem;
  flex-wrap: wrap;
}
.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
}
.stat strong {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text);
}
.stat span {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ===== SECTIONS ===== */
.section { padding: 5rem 0; }
.section-alt { background: var(--bg-alt); }
.section-header {
  text-align: center;
  max-width: 560px;
  margin: 0 auto 3rem;
}
.section-header h2 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 0.75rem;
  letter-spacing: -0.02em;
}
.section-header p { color: var(--text-muted); }

/* ===== FEATURES ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  transition: transform 0.2s, border-color 0.2s;
}
.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--primary);
}
.feature-icon {
  font-size: 1.75rem;
  margin-bottom: 1rem;
}
.feature-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}
.feature-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* ===== PRICING ===== */
.pricing-toggle {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-bottom: 2.5rem;
  background: var(--bg-card);
  border-radius: 999px;
  padding: 0.35rem;
  width: fit-content;
  margin-left: auto;
  margin-right: auto;
  border: 1px solid var(--border);
}
.toggle-btn {
  padding: 0.5rem 1.25rem;
  border-radius: 999px;
  background: transparent;
  color: var(--text-muted);
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  border: none;
}
.toggle-btn.active {
  background: var(--primary);
  color: white;
}
.save-badge {
  font-size: 0.7rem;
  background: var(--success);
  color: white;
  padding: 0.1rem 0.4rem;
  border-radius: 999px;
  margin-left: 0.3rem;
}
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  align-items: start;
}
.price-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  position: relative;
  transition: transform 0.2s, border-color 0.2s;
}
.price-card:hover { transform: translateY(-4px); }
.price-card.popular {
  border-color: var(--primary);
  box-shadow: 0 0 40px rgba(99,102,241,0.2);
}
.popular-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary);
  color: white;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.3rem 0.9rem;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.price-header { margin-bottom: 1.5rem; }
.price-header h3 {
  font-size: 1.35rem;
  font-weight: 800;
  margin-bottom: 0.25rem;
}
.price-desc {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 1rem;
}
.price {
  display: flex;
  align-items: baseline;
  gap: 0.25rem;
}
.amount {
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.03em;
}
.period {
  color: var(--text-muted);
  font-size: 1rem;
}
.price-features {
  list-style: none;
  margin-bottom: 1.75rem;
}
.price-features li {
  padding: 0.45rem 0;
  font-size: 0.95rem;
  color: var(--text);
}
.price-features li.muted {
  color: var(--text-muted);
  opacity: 0.6;
}

/* ===== CTA ===== */
.cta-section {
  background: radial-gradient(ellipse 70% 80% at 50% 100%, rgba(99,102,241,0.2), transparent);
  text-align: center;
}
.cta-inner h2 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 0.75rem;
}
.cta-inner p {
  color: var(--text-muted);
  margin-bottom: 1.75rem;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

/* ===== DASHBOARD ===== */
.dashboard {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 0;
  min-height: calc(100vh - 64px);
  padding: 0;
  max-width: 100%;
}
.sidebar {
  background: var(--bg-alt);
  border-right: 1px solid var(--border);
  padding: 1.5rem 1rem;
  position: sticky;
  top: 64px;
  height: calc(100vh - 64px);
  overflow-y: auto;
}
.sidebar-section { margin-bottom: 1.5rem; }
.sidebar-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  padding: 0 0.75rem;
  margin-bottom: 0.5rem;
  font-weight: 600;
}
.sidebar-item {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  width: 100%;
  padding: 0.7rem 0.75rem;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-muted);
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
  text-align: left;
  border: none;
}
.sidebar-item:hover, .sidebar-item.active {
  background: var(--bg-hover);
  color: var(--text);
}
.sidebar-item.active {
  background: rgba(99,102,241,0.15);
  color: #a5b4fc;
}
.dashboard-main {
  padding: 2rem;
  overflow-y: auto;
}
.dash-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 2rem;
  flex-wrap: wrap;
  gap: 1rem;
}
.dash-header h2 {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 0.25rem;
}
.dash-header p { color: var(--text-muted); font-size: 0.95rem; }
.usage-badge {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 0.5rem 1rem;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
}

/* ===== TOOLS ===== */
.tool-panel {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
}
.form-group {
  margin-bottom: 1.25rem;
}
.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
  color: var(--text-muted);
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.7rem 0.9rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  transition: border-color 0.2s;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--primary);
}
.form-group textarea { resize: vertical; min-height: 80px; }
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.result-box {
  margin-top: 1.5rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1.25rem;
}
.result-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
}
.result-box pre {
  white-space: pre-wrap;
  word-break: break-word;
  font-family: var(--font);
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--text);
}
.ideas-list {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}
.idea-item {
  display: flex;
  gap: 0.75rem;
  padding: 0.75rem;
  background: var(--bg-card);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}
.idea-num {
  font-weight: 800;
  color: var(--primary);
  min-width: 1.5rem;
}

/* Calculator */
.calc-result .calc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1rem;
  margin-bottom: 1rem;
}
.calc-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1rem;
  text-align: center;
}
.calc-item span {
  display: block;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
}
.calc-item strong {
  font-size: 1.35rem;
  font-weight: 800;
}
.calc-item.highlight {
  border-color: var(--primary);
  background: rgba(99,102,241,0.1);
}
.calc-item.highlight strong { color: #a5b4fc; }
.calc-tip {
  font-size: 0.9rem;
  color: var(--text-muted);
  text-align: center;
}

/* Library */
.library-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1rem;
}
.library-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1.25rem;
  transition: border-color 0.2s;
}
.library-card:hover { border-color: var(--primary); }
.library-card.locked {
  opacity: 0.6;
  position: relative;
}
.library-card h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.35rem;
}
.library-card p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}
.lock-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--warning);
  background: rgba(245,158,11,0.15);
  padding: 0.25rem 0.5rem;
  border-radius: 999px;
}

/* ===== ACCOUNT ===== */
.account-page {
  padding: 2.5rem 1.25rem;
  max-width: 900px;
}
.account-page h2 {
  font-size: 1.75rem;
  font-weight: 800;
  margin-bottom: 1.5rem;
}
.account-grid {
  display: grid;
  gap: 1.25rem;
}
.account-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
}
.account-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
}
.current-plan {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 0.5rem;
}
.plan-name {
  font-size: 1.5rem;
  font-weight: 800;
}
.plan-price {
  color: var(--text-muted);
  font-size: 1rem;
}
.account-actions {
  display: flex;
  gap: 0.75rem;
  margin-top: 1.25rem;
  flex-wrap: wrap;
}
.usage-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}
.usage-item {
  text-align: center;
  padding: 1rem;
  background: var(--bg);
  border-radius: var(--radius-sm);
}
.usage-item span {
  display: block;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
}
.usage-item strong {
  font-size: 1.5rem;
  font-weight: 800;
}

/* ===== MODAL ===== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  padding: 1rem;
}
.modal {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  width: 100%;
  max-width: 420px;
  position: relative;
  box-shadow: var(--shadow);
}
.modal-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.5rem;
  cursor: pointer;
  line-height: 1;
}
.modal-close:hover { color: var(--text); }
.modal h2 {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 0.35rem;
}
.modal-sub {
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  font-size: 0.95rem;
}
.auth-switch {
  text-align: center;
  margin-top: 1.25rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}
.auth-switch a {
  color: var(--primary);
  font-weight: 600;
  margin-left: 0.3rem;
}

/* ===== TOAST ===== */
.toast {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 0.9rem 1.25rem;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow);
  font-weight: 500;
  z-index: 300;
  transform: translateY(120%);
  opacity: 0;
  transition: all 0.3s ease;
  max-width: 340px;
}
.toast.show {
  transform: translateY(0);
  opacity: 1;
}
.toast.success { border-color: var(--success); }
.toast.error { border-color: var(--danger); }

/* ===== FOOTER ===== */
.footer {
  margin-top: auto;
  border-top: 1px solid var(--border);
  padding: 2rem 0;
  background: var(--bg-alt);
}
.footer-inner {
  text-align: center;
}
.footer-brand {
  font-weight: 800;
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
}
.footer p {
  color: var(--text-muted);
  font-size: 0.9rem;
}
.footer-note {
  margin-top: 0.5rem;
  font-size: 0.8rem !important;
  opacity: 0.7;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--bg-alt);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 1rem;
    gap: 0.5rem;
  }
  .nav-links.open { display: flex; }
  .mobile-toggle { display: flex; }
  .hero { padding: 3rem 0 2.5rem; }
  .hero-stats { gap: 1.5rem; }
  .form-row { grid-template-columns: 1fr; }
  .dashboard {
    grid-template-columns: 1fr;
  }
  .sidebar {
    position: relative;
    top: 0;
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--border);
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem;
    padding: 1rem;
  }
  .sidebar-section {
    margin-bottom: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem;
  }
  .sidebar-label { display: none; }
  .sidebar-item {
    width: auto;
    padding: 0.5rem 0.75rem;
    font-size: 0.85rem;
  }
  .dashboard-main { padding: 1.25rem; }
  .usage-stats { grid-template-columns: 1fr; }
}