/* ==========================================================================
   RADII — QUIET SINGLE-VIEWPORT LANDING PAGE
   Refined, static, subtle palette, normal weight typography, zero gradients
   ========================================================================== */

:root {
  --color-bg: #0d0f11;
  --color-surface: #14171a;
  --color-border: #23272b;
  --color-border-hover: #343a40;

  --color-text-main: #f0f2f5;
  --color-text-secondary: #8c96a0;
  --color-text-muted: #5e6770;

  --color-accent-subtle: #193822;
  --color-accent-text: #3ec867;
  --color-btn-bg: #1e7d38;
  --color-btn-hover: #238d40;

  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
}

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

html, body {
  height: 100%;
  font-family: var(--font-family);
  background-color: var(--color-bg);
  color: var(--color-text-main);
  line-height: 1.5;
  font-weight: 400;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

/* Single viewport container */
.page-layout {
  height: 100vh;
  height: 100dvh;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 24px 32px;
  max-width: 960px;
  margin: 0 auto;
}

/* Header */
.site-header {
  width: 100%;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.brand-logo {
  border-radius: var(--radius-sm);
  display: block;
}

.brand-name {
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--color-text-main);
}

.nav-link {
  font-size: 0.9rem;
  font-weight: 400;
  color: var(--color-text-secondary);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background-color: var(--color-surface);
}

.nav-link:hover {
  color: var(--color-text-main);
  border-color: var(--color-border-hover);
}

/* Main Hero */
.hero-main {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 24px 0;
}

.hero-content {
  max-width: 580px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.app-icon-box {
  margin-bottom: 20px;
}

.hero-app-icon {
  border-radius: 18px;
  border: 1px solid var(--color-border);
  background-color: var(--color-surface);
  display: block;
}

.status-indicator {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 12px;
  border-radius: 20px;
  background-color: var(--color-accent-subtle);
  border: 1px solid #234b2f;
  color: var(--color-accent-text);
  font-size: 0.8rem;
  font-weight: 400;
  margin-bottom: 20px;
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-accent-text);
}

.hero-title {
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 400;
  line-height: 1.22;
  letter-spacing: -0.02em;
  color: var(--color-text-main);
  margin-bottom: 16px;
}

.hero-description {
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.6;
  color: var(--color-text-secondary);
  margin-bottom: 28px;
}

/* CTA Actions */
.cta-actions {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  width: 100%;
  max-width: 360px;
  margin-bottom: 28px;
}

.btn-download {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  padding: 12px 18px;
  border-radius: var(--radius-md);
  background-color: var(--color-btn-bg);
  border: 1px solid #289e47;
  color: #ffffff;
  font-size: 0.95rem;
  font-weight: 500;
}

.btn-download:hover {
  background-color: var(--color-btn-hover);
}

.download-icon {
  flex-shrink: 0;
}

.version-tag {
  font-size: 0.78rem;
  font-weight: 400;
  color: #b9e3c4;
  margin-left: 4px;
}

.playstore-note {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 8px 14px;
  border-radius: var(--radius-md);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  font-size: 0.85rem;
  font-weight: 400;
}

.play-icon {
  flex-shrink: 0;
  color: var(--color-text-muted);
}

/* Feature tags line */
.features-line {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.82rem;
  color: var(--color-text-muted);
  font-weight: 400;
}

.sep {
  opacity: 0.4;
}

/* Footer */
.site-footer {
  width: 100%;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.82rem;
  color: var(--color-text-muted);
  font-weight: 400;
}

.footer-inner a {
  color: var(--color-text-secondary);
}

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

.footer-links {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Responsive adjustments */
@media (max-width: 600px) {
  .page-layout {
    padding: 16px 20px;
    height: auto;
    min-height: 100vh;
  }
  .hero-main {
    padding: 36px 0;
  }
  .hero-title {
    font-size: 1.85rem;
  }
  .footer-inner {
    flex-direction: column;
    gap: 10px;
    text-align: center;
  }
}