:root {
  --primary: #6366f1;
  --primary-strong: #4f46e5;
  --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --success-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  --dark-bg: #0f1419;
  --muted-bg: #f5f7fb;
  --glass-bg: rgba(255, 255, 255, 0.12);
  --surface: rgba(255, 255, 255, 0.96);
  --surface-dark: rgba(15, 23, 42, 0.92);
  --text-primary: #0f172a;
  --text-muted: rgba(15, 23, 42, 0.64);
  --border-color: rgba(15, 23, 42, 0.08);
  --border-strong: rgba(99, 102, 241, 0.16);
  --shadow-sm: 0 2px 12px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 12px 32px -10px rgba(15, 23, 42, 0.14);
  --shadow-lg: 0 24px 48px -12px rgba(15, 23, 42, 0.18);
  --shadow-card: 0 24px 60px rgba(15, 23, 42, 0.12);
  --radius-xs: 8px;
  --radius-sm: 12px;
  --radius-md: 18px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1200px;
}

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

body {
  margin: 0;
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    sans-serif;
  line-height: 1.7;
  color: var(--text-primary);
  background: linear-gradient(180deg, #fafbff 0%, #ffffff 100%);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
  text-decoration: none;
}

a:hover {
  color: var(--primary);
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.topbar {
  background: var(--dark-bg);
  color: rgba(255, 255, 255, 0.85);
  font-size: 14px;
  padding: 10px 0;
  text-align: center;
}

.topbar .container {
  display: flex;
  gap: 12px;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
}

.topbar a {
  color: #61dafb;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

header {
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid rgba(15, 23, 42, 0.06);
  padding: 20px 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  transition: var(--transition);
}

header.scrolled {
  box-shadow: var(--shadow-sm);
  padding: 12px 0;
}

header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 24px;
  margin-left: auto;
}

.header-controls {
  display: flex;
  align-items: center;
  gap: 16px;
}

.account-slot {
  display: flex;
  align-items: center;
}

.logo {
  font-size: 26px;
  font-weight: 800;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.5px;
}

header nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

header nav a {
  color: rgba(15, 23, 42, 0.64);
  font-weight: 600;
  position: relative;
  transition: var(--transition);
}

header nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -8px;
  width: 100%;
  height: 2px;
  background: var(--primary-gradient);
  transform: scaleX(0);
  transform-origin: left;
  transition: var(--transition);
}

header nav a:hover {
  color: var(--text-primary);
}

header nav a:hover::after {
  transform: scaleX(1);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  border-radius: 999px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition);
}

.button--primary {
  background: var(--secondary-gradient);
  color: #ffffff;
  box-shadow: var(--shadow-sm);
}

.button--primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.button--ghost {
  background: rgba(99, 102, 241, 0.12);
  color: var(--primary);
}

.nav-cta {
  background: var(--secondary-gradient);
  color: #ffffff;
  padding: 12px 20px;
  border-radius: 999px;
  font-weight: 600;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.nav-login {
  padding: 10px 18px;
  border-radius: 999px;
  border: 1px solid rgba(99, 102, 241, 0.4);
  background: transparent;
  color: var(--primary);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.nav-login:hover,
.nav-login:focus {
  background: rgba(99, 102, 241, 0.12);
  outline: none;
}

.account-menu {
  position: relative;
}

.account-trigger {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin: 0;
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid rgba(99, 102, 241, 0.2);40px
  background: rgba(99, 102, 241, 0.08);
  cursor: pointer;
  transition: var(--transition);
  color: var(--text-primary);
}

.account-trigger:hover,
.account-trigger:focus {
  background: rgba(99, 102, 241, 0.14);
  outline: none;
}

.account-text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 2px;
}

.account-email {
  font-size: 13px;
  font-weight: 600;
  max-width: 160px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.account-plan {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 2px 8px;
  border-radius: 999px;
  background: rgba(99, 102, 241, 0.16);
  color: var(--primary);
}

.account-plan--pro {
  background: rgba(34, 197, 94, 0.18);
  color: #15803d;
}

.account-plan--one-time {
  background: rgba(37, 99, 235, 0.18);
  color: #1e40af;
}

.account-caret {
  width: 14px;
  height: 14px;
  color: rgba(15, 23, 42, 0.55);
  transition: var(--transition);
}

.account-trigger[aria-expanded="true"] .account-caret {
  transform: rotate(180deg);
}

.account-dropdown {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  min-width: 200px;
  background: #ffffff;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(15, 23, 42, 0.08);
  box-shadow: var(--shadow-md);
  padding: 8px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  z-index: 1010;
}

.account-dropdown a,
.account-dropdown button {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 10px 12px;
  border-radius: var(--radius-xs);
  border: none;
  background: transparent;
  color: var(--text-primary);
  font-size: 14px;
  cursor: pointer;
  transition: var(--transition);
  text-align: left;
}

.account-dropdown a:hover,
.account-dropdown button:hover,
.account-dropdown a:focus,
.account-dropdown button:focus {
  background: rgba(99, 102, 241, 0.12);
  color: var(--primary);
  outline: none;
}

.account-dropdown button[disabled] {
  opacity: 0.6;
  cursor: not-allowed;
}

@media (max-width: 900px) {
  header .container {
    flex-wrap: wrap;
    gap: 18px;
  }

  .header-right {
    width: 100%;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 16px;
  }

  header nav {
    flex-wrap: wrap;
    gap: 18px;
  }

  .header-controls {
    flex-wrap: wrap;
    justify-content: flex-end;
  }
}

.section {
  padding: 96px 0;
}

.section--tight {
  padding: 64px 0;
}

.section-header {
  max-width: 720px;
  margin: 0 auto 48px;
  text-align: center;
}

.section-title {
  font-size: clamp(32px, 4vw, 44px);
  margin-bottom: 12px;
}

.section-subtitle {
  color: var(--text-muted);
  font-size: 18px;
}

.surface {
  background: var(--surface);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.4);
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(18px);
}

.surface--muted {
  background: rgba(255, 255, 255, 0.88);
  border-color: var(--border-color);
  box-shadow: var(--shadow-md);
}

.surface--outline {
  border-color: var(--border-strong);
}

.card-grid {
  display: grid;
  gap: 32px;
}

.card-grid--three {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.card-grid--two {
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

.card {
  padding: 32px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.card--highlight {
  background: linear-gradient(
    135deg,
    rgba(99, 102, 241, 0.12),
    rgba(168, 85, 247, 0.12)
  );
  border-color: rgba(99, 102, 241, 0.24);
}

.text-muted {
  color: var(--text-muted);
}

.hero {
  position: relative;
  padding: 120px 0 100px;
  text-align: center;
  color: #ffffff;
  background: var(--primary-gradient);
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(
      circle at 20% 50%,
      rgba(255, 255, 255, 0.12) 0%,
      transparent 55%
    ),
    radial-gradient(
      circle at 80% 80%,
      rgba(255, 255, 255, 0.1) 0%,
      transparent 55%
    );
  animation: heroFloat 18s ease-in-out infinite;
}

.hero > * {
  position: relative;
  z-index: 1;
}

@keyframes heroFloat {
  0%,
  100% {
    transform: translate3d(0, 0, 0);
  }
  50% {
    transform: translate3d(0, 16px, 0);
  }
}

.hero h1 {
  font-size: clamp(40px, 6vw, 68px);
  margin-bottom: 18px;
  letter-spacing: -0.02em;
}

.hero p {
  font-size: 20px;
  max-width: 760px;
  margin: 0 auto;
  color: rgba(255, 255, 255, 0.85);
}

.hero .hero-actions {
  margin-top: 32px;
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.content-grid {
  display: grid;
  gap: 32px;
}

.content-grid--split {
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

.content-grid--stacked {
  grid-template-columns: 1fr;
}

.surface-section {
  padding: clamp(40px, 6vw, 72px);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(99, 102, 241, 0.1);
  color: var(--primary);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.list-check {
  list-style: none;
  padding: 0;
  margin: 0;
}

.list-check li {
  position: relative;
  padding-left: 28px;
  margin-bottom: 14px;
  color: var(--text-muted);
}

.list-check li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 2px;
  color: #22c55e;
  font-weight: 700;
}

form {
  display: grid;
  gap: 20px;
}

label {
  font-weight: 600;
  color: var(--text-primary);
}

input,
textarea,
select {
  width: 100%;
  padding: 16px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(148, 163, 184, 0.35);
  background: rgba(248, 250, 252, 0.85);
  font-size: 16px;
  color: var(--text-primary);
  transition: var(--transition);
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: rgba(99, 102, 241, 0.6);
  background: #ffffff;
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.18);
}

textarea {
  min-height: 160px;
  resize: vertical;
}

table {
  width: 100%;
  border-collapse: collapse;
  border-radius: var(--radius-sm);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

table thead {
  background: rgba(99, 102, 241, 0.1);
}

table th {
  text-align: left;
  padding: 16px;
  font-weight: 600;
  color: var(--primary-strong);
}

table td {
  padding: 14px 16px;
  color: var(--text-muted);
  border-top: 1px solid rgba(148, 163, 184, 0.2);
}

.note {
  border-radius: var(--radius-sm);
  padding: 20px;
  border: 1px solid rgba(245, 158, 11, 0.3);
  background: rgba(253, 230, 138, 0.16);
  color: #b45309;
}

.highlight-box {
  border-radius: var(--radius-sm);
  padding: 24px;
  border: 1px solid rgba(34, 197, 94, 0.2);
  background: rgba(22, 163, 74, 0.08);
  color: #14532d;
}

.app-footer {
  margin-top: 80px;
  background: #101827;
  color: rgba(148, 163, 184, 0.85);
  padding: 64px 0 40px;
}

.app-footer .container {
  display: flex;
  flex-direction: column;
  gap: 24px;
  align-items: center;
  text-align: center;
}

.app-footer a {
  color: rgba(148, 163, 184, 0.85);
}

.app-footer a:hover {
  color: #ffffff;
}

.footer-links {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: center;
}

@media (max-width: 900px) {
  header nav {
    gap: 18px;
  }

  .section {
    padding: 72px 0;
  }
}

@media (max-width: 720px) {
  header .container {
    flex-direction: column;
    gap: 16px;
  }

  header nav {
    flex-wrap: wrap;
    justify-content: center;
  }

  .hero {
    padding: 100px 0 80px;
  }

  .hero h1 {
    font-size: clamp(34px, 8vw, 48px);
  }

  .hero .hero-actions {
    width: 100%;
  }

  .card {
    padding: 24px;
  }

  table {
    font-size: 14px;
  }

  table th,
  table td {
    padding: 12px;
  }
}