:root {
  --bg: #050816;
  --bg-alt: #0f172a;
  --accent: #38bdf8;
  --accent-soft: rgba(56, 189, 248, 0.12);
  --accent-strong: #f97316;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --card: rgba(15, 23, 42, 0.9);
  --radius-lg: 18px;
  --radius-full: 999px;
  --shadow-soft: 0 18px 45px rgba(15, 23, 42, 0.9);
  --transition: 0.2s ease-out;
}

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

body {
  margin: 0;
  min-height: 100vh;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text", sans-serif;
  color: var(--text);
  background: var(--bg);
  overflow-x: hidden;
}

.bg-gradient {
  position: fixed;
  inset: 0;
  background:
    radial-gradient(circle at top left, rgba(56, 189, 248, 0.18), transparent 55%),
    radial-gradient(circle at bottom right, rgba(249, 115, 22, 0.2), transparent 55%);
  opacity: 0.7;
  pointer-events: none;
  z-index: -1;
}

/* Layout */

.header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  backdrop-filter: blur(18px);
  background: linear-gradient(to bottom, rgba(5, 8, 22, 0.95), transparent);
}

.logo {
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.logo span {
  color: var(--accent);
}

.nav {
  display: flex;
  gap: 16px;
  font-size: 0.9rem;
}

.nav a {
  color: var(--muted);
  text-decoration: none;
  padding: 8px 14px;
  border-radius: var(--radius-full);
  transition: var(--transition);
}

.nav a:hover {
  color: var(--text);
  background: rgba(15, 23, 42, 0.85);
}

.main {
  max-width: 1040px;
  margin: 0 auto;
  padding: 32px 16px 64px;
}

/* Hero */

.hero {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 2.5fr);
  gap: 32px;
  align-items: center;
  margin-bottom: 56px;
}

.hero-text h1 {
  font-size: clamp(2.4rem, 3vw, 3rem);
  margin-bottom: 12px;
}

.hero-text p {
  color: var(--muted);
  max-width: 460px;
}

.hero-card {
  position: relative;
  padding: 2px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  box-shadow: var(--shadow-soft);
}

.card-shape {
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  background:
    radial-gradient(circle at 10% 0%, rgba(248, 250, 252, 0.12), transparent 55%),
    radial-gradient(circle at 90% 100%, rgba(15, 23, 42, 0.9), transparent 50%);
  mix-blend-mode: screen;
  opacity: 0.3;
}

.card-content {
  position: relative;
  padding: 20px 22px;
  border-radius: calc(var(--radius-lg) - 2px);
  background: radial-gradient(circle at top left, rgba(15, 23, 42, 0.85), rgba(15, 23, 42, 0.95));
}

.card-content h2 {
  margin: 0 0 6px;
}

.card-content p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

/* Sections */

.how {
  margin-bottom: 48px;
}

.how h2,
.app-section h2 {
  font-size: 1.6rem;
  margin-bottom: 8px;
}

.how-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 18px;
  margin-top: 16px;
}

.step {
  position: relative;
  padding: 18px 16px 16px;
  border-radius: 16px;
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid rgba(148, 163, 184, 0.25);
}

.step-badge {
  position: absolute;
  top: -10px;
  left: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: var(--radius-full);
  background: var(--accent);
  color: #020617;
  font-size: 0.8rem;
  font-weight: 700;
}

/* App uploader */

.app-section {
  padding: 22px 18px;
  border-radius: 20px;
  background: rgba(15, 23, 42, 0.96);
  border: 1px solid rgba(148, 163, 184, 0.35);
  box-shadow: var(--shadow-soft);
}

.app-subtitle {
  color: var(--muted);
  margin-bottom: 18px;
}

.uploader {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.upload-area {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 14px;
  border-radius: 16px;
  background: rgba(15, 23, 42, 0.9);
  border: 1px dashed rgba(148, 163, 184, 0.6);
  cursor: pointer;
  transition: var(--transition);
}

.upload-area:hover {
  border-style: solid;
  border-color: var(--accent);
  background: rgba(15, 23, 42, 0.95);
}

.upload-icon {
  width: 38px;
  height: 38px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-soft);
  font-size: 1.4rem;
}

.upload-text strong {
  display: block;
}

.upload-text span {
  display: block;
  color: var(--muted);
  font-size: 0.85rem;
}

.primary-btn {
  border: none;
  border-radius: var(--radius-full);
  padding: 10px 18px;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #020617;
  font-weight: 600;
  cursor: pointer;
  font-size: 0.95rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  box-shadow: 0 14px 30px rgba(15, 23, 42, 0.9);
  transition: var(--transition);
}

.primary-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 18px 40px rgba(15, 23, 42, 0.95);
}

.full-width {
  width: 100%;
}

/* Preview & Result */

.preview,
.result,
.loader {
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid rgba(30, 64, 175, 0.5);
}

.preview img {
  max-width: 100%;
  border-radius: 14px;
  margin-top: 8px;
  border: 1px solid rgba(30, 64, 175, 0.45);
}

.result-item {
  padding: 10px 0;
  border-bottom: 1px dashed rgba(55, 65, 81, 0.9);
}

.result-item:last-child {
  border-bottom: none;
}

.result-item-title {
  font-weight: 600;
}

.result-item-meta {
  font-size: 0.9rem;
  color: var(--muted);
}

/* Loader */

.loader {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
}

.spinner {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 3px solid rgba(148, 163, 184, 0.4);
  border-top-color: var(--accent);
  animation: spin 1s linear infinite;
}

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

/* Footer */

.footer {
  text-align: center;
  padding: 24px 16px 32px;
  font-size: 0.8rem;
  color: var(--muted);
}

/* Utils */

.hidden {
  display: none;
}

/* Responsive */

@media (max-width: 768px) {
  .header {
    padding-inline: 16px;
  }

  .nav {
    display: none;
  }

  .hero {
    grid-template-columns: 1fr;
  }

  .hero-card {
    order: -1;
  }

  .main {
    padding-inline: 16px;
  }
}