:root {
  --bg: #f5f7fb;
  --surface: #ffffff;
  --surface-alt: #eef3ff;
  --primary: #234d8b;
  --primary-dark: #183965;
  --primary-soft: #eaf1ff;
  --accent: #6aa8ff;
  --text: #1b2430;
  --muted: #5f6f82;
  --border: #dfe7f3;
  --shadow: 0 18px 35px rgba(26, 35, 56, 0.08);
  --success: #2f9e71;
  --premium: #8257ff;
  --premium-soft: #f0ebff;
  --radius: 22px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

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

img {
  max-width: 100%;
}

button {
  font: inherit;
}

.container {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(8px);
  background: rgba(245, 247, 251, 0.9);
  border-bottom: 1px solid rgba(223, 231, 243, 0.9);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 74px;
  gap: 1rem;
}

.brand {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--primary-dark);
}

.main-nav {
  display: flex;
  gap: 1.5rem;
  align-items: center;
}

.main-nav a {
  color: var(--muted);
  font-weight: 600;
}

.login-btn,
.primary-btn,
.secondary-btn,
.filter-btn {
  border: none;
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.login-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.8rem 1.1rem;
  background: #edf3ff;
  border: 1px solid var(--border);
  color: var(--primary-dark);
  font-weight: 700;
}

.primary-btn,
.secondary-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.9rem 1.35rem;
  font-weight: 700;
}

.primary-btn {
  background: var(--primary);
  color: white;
  box-shadow: var(--shadow);
}

.primary-btn:hover {
  background: var(--primary-dark);
}

.secondary-btn {
  background: var(--primary-soft);
  color: var(--primary-dark);
}

.login-page {
  min-height: calc(100vh - 220px);
  display: grid;
  place-items: center;
  padding: 3rem 0;
}

.login-panel {
  width: min(100%, 560px);
  padding: 2rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.login-panel h1 {
  font-size: clamp(2rem, 4vw, 3.2rem);
}

.login-form {
  margin-top: 1.5rem;
}

.login-form label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--text);
  font-weight: 700;
}

.login-row {
  display: flex;
  gap: 0.75rem;
}

.login-row input {
  min-width: 0;
  flex: 1;
  padding: 0.85rem 1rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  font: inherit;
}

.form-error {
  margin: 0.85rem 0 0;
  color: #b42318;
  font-weight: 700;
}

.hero {
  padding: 4.5rem 0 2rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.5fr 0.9fr;
  gap: 2rem;
  align-items: center;
}

.eyebrow {
  display: inline-block;
  margin: 0 0 1rem;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--primary);
}

h1, h2, h3 {
  margin: 0 0 0.8rem;
  letter-spacing: -0.03em;
  line-height: 1.15;
}

h1 {
  font-size: clamp(2.4rem, 5vw, 4.2rem);
}

h2 {
  font-size: clamp(1.8rem, 3vw, 2.6rem);
}

h3 {
  font-size: 1.45rem;
}

.lead {
  max-width: 60ch;
  font-size: 1.12rem;
  color: var(--muted);
}

.hero-actions {
  display: flex;
  gap: 1rem;
  margin-top: 1.5rem;
}

.hero-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.6rem;
  display: grid;
  gap: 1rem;
}

.hero-info-card {
  align-self: stretch;
  align-content: center;
}

.hero-info-card h2 {
  font-size: 1.6rem;
}

.hero-info-card p {
  margin: 0;
  color: var(--muted);
}

.hero-info-list {
  display: grid;
  gap: 0.65rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.hero-info-list li {
  padding-top: 0.65rem;
  border-top: 1px solid var(--border);
  color: var(--text);
  font-weight: 650;
}

.section {
  padding: 2.5rem 0;
}

.section-soft {
  background: linear-gradient(180deg, rgba(234, 241, 255, 0.55), rgba(245, 247, 251, 0));
}

.section-heading {
  margin-bottom: 1.5rem;
}

.app-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.35rem;
}

.app-grid-compact {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.app-card,
.detail-card,
.info-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.app-card {
  padding: 1.4rem;
}

.card-topline,
.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.meta-row {
  margin: 1rem 0 1.25rem;
}

.meta-row span,
.category-chip {
  padding: 0.38rem 0.7rem;
  border-radius: 999px;
  background: var(--surface-alt);
  color: var(--primary-dark);
  font-size: 0.75rem;
  font-weight: 700;
}

.tag {
  display: inline-block;
  padding: 0.4rem 0.7rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.tag.free {
  background: rgba(47, 158, 113, 0.12);
  color: var(--success);
}

.tag.premium {
  background: var(--premium-soft);
  color: var(--premium);
}

.app-card p,
.info-panel p,
.detail-card p,
.narrow p {
  color: var(--muted);
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.filter-btn {
  padding: 0.72rem 1rem;
  background: #eef3fa;
  color: var(--primary-dark);
  border: 1px solid var(--border);
  font-weight: 700;
}

.filter-btn.active {
  background: var(--primary);
  color: white;
}

.page-header {
  padding-top: 3.5rem;
}

.narrow {
  max-width: 760px;
}

.detail-card {
  padding: 2rem;
}

.split-layout {
  display: grid;
  grid-template-columns: 0.8fr 1.6fr;
  gap: 2rem;
  align-items: start;
}

.info-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.info-panel {
  padding: 1.4rem;
}

.premium-panel {
  background: linear-gradient(180deg, #f9f6ff 0%, #f3efff 100%);
}

.site-footer {
  border-top: 1px solid var(--border);
  background: #f1f5fb;
  margin-top: 2rem;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.4rem 0;
  gap: 1rem;
  color: var(--muted);
}

@media (max-width: 860px) {
  .hero-grid,
  .split-layout,
  .app-grid,
  .app-grid-compact,
  .info-columns {
    grid-template-columns: 1fr;
  }

  .nav-wrap {
    flex-wrap: wrap;
    justify-content: center;
    padding: 0.75rem 0;
  }

  .main-nav {
    order: 3;
    width: 100%;
    justify-content: center;
  }

  .login-row {
    flex-direction: column;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
}