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

:root {
  --black: #0a0a0a;
  --white: #ffffff;
  --gray-50: #f9f9f8;
  --gray-100: #f0efe9;
  --gray-200: #ddddd8;
  --gray-400: #9a9994;
  --gray-700: #3a3a38;
  --gray-900: #1a1a18;
  --accent: #1a1a18;
  --accent-light: #f0efe9;
  --green: #2d6a4f;
  --green-light: #e8f5ef;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --font: 'DM Sans', sans-serif;
  --font-mono: 'DM Mono', monospace;
}

html {
  font-family: var(--font);
  font-size: 16px;
  color: var(--gray-900);
  background: var(--gray-50);
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow-x: hidden;
}

.bg-grid {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(var(--gray-200) 1px, transparent 1px),
    linear-gradient(90deg, var(--gray-200) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: 0.35;
  z-index: 0;
  pointer-events: none;
}

/* ── Navbar ── */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(249, 249, 248, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--gray-200);
}
.nav-inner {
  max-width: 680px;
  margin: 0 auto;
  padding: 0 24px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo { display: flex; align-items: center; gap: 10px; }
.logo-icon {
  width: 32px; height: 32px;
  background: var(--gray-900);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  color: var(--white); overflow: hidden;
}
.logo-name { font-weight: 600; font-size: 15px; letter-spacing: -0.02em; color: var(--gray-900); }
.version-badge {
  font-family: var(--font-mono);
  font-size: 11px; color: var(--gray-400);
  background: var(--gray-100);
  border: 1px solid var(--gray-200);
  padding: 3px 10px; border-radius: 100px;
}

/* ── Hero ── */
.hero {
  flex: 1;
  display: flex; align-items: center; justify-content: center;
  padding: 80px 24px 60px;
  position: relative; z-index: 1;
}
.hero-inner {
  max-width: 480px; width: 100%;
  display: flex; flex-direction: column;
  align-items: center; text-align: center;
  gap: 0;
}
.app-icon-wrap { position: relative; margin-bottom: 28px; }
.app-icon {
  width: 96px; height: 96px;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-xl);
  display: flex; align-items: center; justify-content: center;
  color: var(--gray-900);
  box-shadow: 0 4px 24px rgba(0,0,0,0.06);
  overflow: hidden;
}
.status-dot {
  position: absolute; bottom: 4px; right: 4px;
  width: 14px; height: 14px;
  background: #22c55e; border-radius: 50%;
  border: 2.5px solid var(--gray-50);
}
.hero-text { margin-bottom: 16px; }
.app-title { font-size: 38px; font-weight: 600; letter-spacing: -0.04em; color: var(--gray-900); line-height: 1.1; margin-bottom: 8px; }
.app-tagline { font-size: 16px; color: var(--gray-400); font-weight: 400; letter-spacing: -0.01em; }
.app-description { font-size: 15px; line-height: 1.7; color: var(--gray-700); margin-bottom: 24px; max-width: 380px; }

.meta-row { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; justify-content: center; margin-bottom: 36px; }
.meta-chip {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: 12px; font-weight: 500; color: var(--gray-700);
  background: var(--white); border: 1px solid var(--gray-200);
  padding: 5px 12px; border-radius: 100px;
}
.meta-chip svg { color: var(--gray-400); flex-shrink: 0; }

.download-btn {
  display: inline-flex; align-items: center; gap: 10px;
  background: var(--gray-900); color: var(--white);
  text-decoration: none; font-size: 15px; font-weight: 500;
  padding: 14px 32px; border-radius: var(--radius-md);
  letter-spacing: -0.01em;
  transition: background 0.15s, transform 0.1s;
  margin-bottom: 16px; border: none; cursor: pointer;
}
.download-btn:hover { background: var(--gray-700); }
.download-btn:active { transform: scale(0.98); }
.btn-icon { flex-shrink: 0; }

.install-note { font-size: 12.5px; color: var(--gray-400); line-height: 1.6; max-width: 340px; margin-top: 8px; }
.install-note strong { color: var(--gray-700); font-weight: 500; }

/* ── Versions List ── */
.versions-list {
  width: 100%; max-width: 420px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  background: var(--white);
  overflow: hidden;
  margin-bottom: 20px;
}
.versions-header {
  padding: 10px 16px;
  font-size: 11px; font-weight: 600;
  letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--gray-400);
  border-bottom: 1px solid var(--gray-200);
  background: var(--gray-50);
}
.version-row {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--gray-100);
  transition: background 0.1s;
}
.version-row:last-child { border-bottom: none; }
.version-row:hover { background: var(--gray-50); }
.version-info { display: flex; flex-direction: column; gap: 2px; }
.version-name { font-size: 13.5px; font-weight: 500; color: var(--gray-900); }
.version-meta { font-size: 12px; color: var(--gray-400); font-family: var(--font-mono); }
.version-dl {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 13px; font-weight: 500;
  color: var(--gray-900); text-decoration: none;
  background: var(--gray-100); border: 1px solid var(--gray-200);
  padding: 6px 14px; border-radius: var(--radius-sm);
  transition: background 0.12s, transform 0.1s;
}
.version-dl:hover { background: var(--gray-200); }
.version-dl:active { transform: scale(0.97); }
.badge-latest {
  font-size: 10px; font-weight: 600;
  background: var(--green-light); color: var(--green);
  padding: 2px 8px; border-radius: 100px;
  letter-spacing: 0.04em; text-transform: uppercase;
  margin-left: 6px;
}

/* ── Static pages (about, contact, privacy) ── */
.page-wrap {
  flex: 1; position: relative; z-index: 1;
  max-width: 680px; margin: 0 auto;
  padding: 60px 24px 80px;
}
.page-wrap h1 { font-size: 32px; font-weight: 600; letter-spacing: -0.03em; margin-bottom: 8px; }
.page-wrap .page-sub { font-size: 15px; color: var(--gray-400); margin-bottom: 40px; }
.page-section { margin-bottom: 36px; }
.page-section h2 { font-size: 16px; font-weight: 600; margin-bottom: 10px; color: var(--gray-900); }
.page-section p, .page-section li { font-size: 15px; line-height: 1.75; color: var(--gray-700); }
.page-section ul { padding-left: 20px; }
.page-section ul li { margin-bottom: 6px; }
.contact-form { display: flex; flex-direction: column; gap: 14px; max-width: 480px; }
.contact-form label { font-size: 13px; font-weight: 500; color: var(--gray-700); display: block; margin-bottom: 4px; }
.contact-form input, .contact-form textarea {
  width: 100%; padding: 11px 14px;
  font-family: var(--font); font-size: 14px;
  border: 1px solid var(--gray-200); border-radius: var(--radius-sm);
  background: var(--white); color: var(--gray-900);
  outline: none; transition: border-color 0.15s;
}
.contact-form input:focus, .contact-form textarea:focus { border-color: var(--gray-700); }
.contact-form textarea { min-height: 120px; resize: vertical; }
.contact-form .submit-btn {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--gray-900); color: var(--white);
  border: none; cursor: pointer; font-family: var(--font);
  font-size: 14px; font-weight: 500;
  padding: 12px 24px; border-radius: var(--radius-sm);
  transition: background 0.15s;
  width: fit-content;
}
.contact-form .submit-btn:hover { background: var(--gray-700); }
.success-msg { display: none; padding: 12px 16px; background: var(--green-light); color: var(--green); border-radius: var(--radius-sm); font-size: 14px; font-weight: 500; }

/* ── Admin ── */
.admin-wrap {
  flex: 1; position: relative; z-index: 1;
  max-width: 680px; margin: 0 auto;
  padding: 60px 24px 80px;
}
.admin-wrap h1 { font-size: 28px; font-weight: 600; letter-spacing: -0.03em; margin-bottom: 6px; }
.admin-wrap .admin-sub { font-size: 14px; color: var(--gray-400); margin-bottom: 40px; }
.admin-card {
  background: var(--white); border: 1px solid var(--gray-200);
  border-radius: var(--radius-md); padding: 24px;
  margin-bottom: 24px;
}
.admin-card h2 { font-size: 15px; font-weight: 600; margin-bottom: 16px; color: var(--gray-900); }
.drop-zone {
  border: 2px dashed var(--gray-200);
  border-radius: var(--radius-sm);
  padding: 36px 24px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}
.drop-zone:hover, .drop-zone.drag-over { border-color: var(--gray-700); background: var(--gray-50); }
.drop-zone-icon { color: var(--gray-400); margin-bottom: 10px; }
.drop-zone-text { font-size: 14px; color: var(--gray-700); font-weight: 500; }
.drop-zone-sub { font-size: 12px; color: var(--gray-400); margin-top: 4px; }
#file-input { display: none; }
.upload-list { margin-top: 16px; display: flex; flex-direction: column; gap: 8px; }
.upload-item {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 14px;
  background: var(--gray-50); border: 1px solid var(--gray-200);
  border-radius: var(--radius-sm);
  font-size: 13px;
}
.upload-item-name { font-weight: 500; color: var(--gray-900); }
.upload-item-size { font-family: var(--font-mono); font-size: 12px; color: var(--gray-400); }
.upload-item-del {
  background: none; border: none; cursor: pointer;
  color: var(--gray-400); padding: 2px 6px;
  border-radius: 4px; transition: color 0.1s, background 0.1s;
}
.upload-item-del:hover { color: #dc2626; background: #fee2e2; }
.upload-confirm-btn {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--gray-900); color: var(--white);
  border: none; cursor: pointer; font-family: var(--font);
  font-size: 14px; font-weight: 500;
  padding: 11px 22px; border-radius: var(--radius-sm);
  transition: background 0.15s; margin-top: 14px;
}
.upload-confirm-btn:hover { background: var(--gray-700); }
.upload-confirm-btn:disabled { opacity: 0.5; cursor: not-allowed; }
.files-table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.files-table th {
  text-align: left; padding: 8px 12px;
  font-size: 11px; font-weight: 600; letter-spacing: 0.05em;
  text-transform: uppercase; color: var(--gray-400);
  border-bottom: 1px solid var(--gray-200);
}
.files-table td { padding: 11px 12px; border-bottom: 1px solid var(--gray-100); color: var(--gray-700); vertical-align: middle; }
.files-table tr:last-child td { border-bottom: none; }
.files-table tr:hover td { background: var(--gray-50); }
.tbl-name { font-weight: 500; color: var(--gray-900); }
.tbl-mono { font-family: var(--font-mono); font-size: 12px; }
.tbl-actions { display: flex; gap: 8px; }
.tbl-btn {
  font-size: 12px; padding: 4px 10px; border-radius: 6px;
  border: 1px solid var(--gray-200); background: var(--white);
  cursor: pointer; font-family: var(--font); color: var(--gray-700);
  transition: background 0.1s;
}
.tbl-btn:hover { background: var(--gray-100); }
.tbl-btn.del { color: #dc2626; border-color: #fca5a5; }
.tbl-btn.del:hover { background: #fee2e2; }
.no-files { padding: 24px; text-align: center; color: var(--gray-400); font-size: 14px; }
.login-box {
  max-width: 340px; margin: 100px auto 0;
  background: var(--white); border: 1px solid var(--gray-200);
  border-radius: var(--radius-md); padding: 32px;
}
.login-box h2 { font-size: 20px; font-weight: 600; margin-bottom: 20px; }
.login-box input {
  width: 100%; padding: 10px 14px; margin-bottom: 12px;
  border: 1px solid var(--gray-200); border-radius: var(--radius-sm);
  font-family: var(--font); font-size: 14px; color: var(--gray-900);
  outline: none;
}
.login-box input:focus { border-color: var(--gray-700); }
.login-box button {
  width: 100%; padding: 11px;
  background: var(--gray-900); color: var(--white);
  border: none; border-radius: var(--radius-sm);
  font-family: var(--font); font-size: 14px; font-weight: 500;
  cursor: pointer; transition: background 0.15s;
}
.login-box button:hover { background: var(--gray-700); }
.login-err { font-size: 12.5px; color: #dc2626; margin-top: 8px; display: none; }
.progress-bar-wrap { height: 4px; background: var(--gray-100); border-radius: 2px; overflow: hidden; margin-top: 10px; display: none; }
.progress-bar { height: 100%; background: var(--gray-900); border-radius: 2px; width: 0; transition: width 0.3s; }

/* ── Footer ── */
.footer {
  position: relative; z-index: 1;
  border-top: 1px solid var(--gray-200);
  background: rgba(249, 249, 248, 0.7);
  backdrop-filter: blur(8px);
}
.footer-inner {
  max-width: 680px; margin: 0 auto;
  padding: 16px 24px;
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
  font-size: 12.5px; color: var(--gray-400);
}
.footer-sep { color: var(--gray-200); }
.footer-inner a { color: var(--gray-400); text-decoration: none; }
.footer-inner a:hover { color: var(--gray-700); }

@media (max-width: 480px) {
  .hero { padding: 48px 20px 48px; }
  .app-title { font-size: 28px; }
  .download-btn { width: 100%; justify-content: center; }
  .meta-row { gap: 6px; }
  .footer-inner { gap: 8px; }
}

/* ── AdSense Ad Placements ── */
.ad-banner-wrap {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 728px;
  margin: 0 auto;
  padding: 10px 24px;
  text-align: center;
}
.ad-banner-wrap.ad-bottom {
  padding: 10px 24px 4px;
}
.ad-banner {
  display: block;
  width: 100%;
  min-height: 90px;
}
.ad-inline-wrap {
  width: 100%;
  max-width: 400px;
  margin: 0 auto 24px;
  text-align: center;
}
.ad-square {
  display: inline-block;
  width: 300px;
  height: 250px;
}
/* Label ads subtly for compliance */
.ad-banner-wrap::before,
.ad-inline-wrap::before {
  content: 'Advertisement';
  display: block;
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gray-400);
  margin-bottom: 4px;
}
@media (max-width: 480px) {
  .ad-square { width: 100%; height: auto; min-height: 200px; }
  .ad-banner-wrap { padding: 8px 12px; }
}