:root {
  --bg: #ffffff;
  --bg-soft: #f6f7f9;
  --border: #e5e7eb;
  --text: #16181d;
  --text-muted: #6b7280;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #eff4ff;
  --danger: #dc2626;
  --success: #16a34a;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 3px rgba(16,24,40,0.06), 0 1px 2px rgba(16,24,40,0.04);
  --shadow-md: 0 4px 12px rgba(16,24,40,0.08), 0 2px 4px rgba(16,24,40,0.04);
  --shadow-lg: 0 12px 32px rgba(16,24,40,0.12), 0 4px 8px rgba(16,24,40,0.04);
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--primary); text-decoration: none; transition: color .15s var(--ease); }
a:hover { color: var(--primary-dark); text-decoration: none; }

.container { max-width: 1120px; margin: 0 auto; padding: 0 20px; }
.narrow { max-width: 640px; }

/* ================= Header ================= */
header.site-header {
  border-bottom: 1px solid var(--border);
  background: rgba(255,255,255,0.75);
  backdrop-filter: blur(10px) saturate(160%);
  -webkit-backdrop-filter: blur(10px) saturate(160%);
  position: sticky; top: 0; z-index: 30;
  transition: box-shadow .25s var(--ease);
}
header.site-header.scrolled { box-shadow: var(--shadow-md); }

header.site-header .bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
  position: relative;
}

header.site-header .brand {
  font-weight: 800;
  font-size: 18px;
  color: var(--text);
  letter-spacing: -0.01em;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: opacity .15s var(--ease);
}
header.site-header .brand:hover { opacity: 0.75; }
header.site-header .brand::before {
  content: "";
  width: 9px; height: 9px;
  border-radius: 3px;
  background: linear-gradient(135deg, var(--primary), #7c3aed);
  display: inline-block;
}

header.site-header nav { display: flex; align-items: center; }

header.site-header nav a {
  position: relative;
  margin-left: 26px;
  color: var(--text-muted);
  font-size: 14px;
  font-weight: 500;
  padding: 4px 0;
}
header.site-header nav a::after {
  content: "";
  position: absolute;
  left: 0; bottom: -2px;
  width: 0; height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transition: width .2s var(--ease);
}
header.site-header nav a:hover {
  color: var(--text);
  text-decoration: none;
}
header.site-header nav a:hover::after { width: 100%; }

/* Hamburger — mobile only */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 22px;
  height: 16px;
  background: none;
  border: none;
  padding: 0;
  margin: 0;
  cursor: pointer;
  z-index: 31;
  -webkit-appearance: none;
  appearance: none;
  -webkit-tap-highlight-color: transparent;
  outline: none;
}
.nav-toggle:focus-visible { outline: 2px solid var(--primary); outline-offset: 4px; border-radius: 2px; }
.nav-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--text);
  border-radius: 2px;
  transition: transform .25s var(--ease), opacity .2s var(--ease);
  flex-shrink: 0;
}
.site-header.nav-open .nav-toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.site-header.nav-open .nav-toggle span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.site-header.nav-open .nav-toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 720px) {
  .nav-toggle { display: flex; }

  header.site-header nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
    padding: 4px 0;

    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transform: translateY(-6px);
    transition: opacity .2s var(--ease), transform .25s var(--ease);
    pointer-events: none;
  }
  .site-header.nav-open nav {
    display: flex;
    max-height: 320px;
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }

  header.site-header nav a {
    margin-left: 0;
    padding: 14px 20px;
    border-bottom: 1px solid var(--border);
    font-size: 15px;
  }
  header.site-header nav a::after { display: none; }
  header.site-header nav a:last-child { border-bottom: none; }
}

/* ================= Footer ================= */
footer.site-footer {
  border-top: 1px solid var(--border);
  margin-top: 60px;
  padding: 32px 0;
  color: var(--text-muted);
  font-size: 13px;
  background: var(--bg-soft);
}
footer.site-footer .bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}
footer.site-footer a { color: var(--text-muted); }
footer.site-footer a:hover { color: var(--primary); }

@media (max-width: 560px) {
  footer.site-footer .bar {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 10px;
  }
}

/* ================= Cards / Grid ================= */
.card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), border-color .25s var(--ease);
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(37,99,235,0.25);
}

.grid { display: grid; gap: 16px; }
.grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid.cols-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 720px) {
  .grid.cols-2, .grid.cols-3, .grid.cols-4 { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 480px) {
  .grid.cols-2, .grid.cols-3, .grid.cols-4 { grid-template-columns: 1fr; }
}

.stat {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  transition: box-shadow .2s var(--ease), transform .2s var(--ease);
}
.stat:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.stat .label { font-size: 12px; color: var(--text-muted); text-transform: uppercase; letter-spacing: .04em; }
.stat .value { font-size: 26px; font-weight: 700; margin-top: 4px; }

/* ================= Buttons ================= */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 10px 18px; border-radius: var(--radius-sm); border: 1px solid transparent;
  font-weight: 600; font-size: 14px; cursor: pointer;
  background: var(--primary); color: #fff;
  transition: background .2s var(--ease), transform .15s var(--ease), box-shadow .2s var(--ease);
  box-shadow: 0 1px 2px rgba(37,99,235,0.15);
}
.btn:hover { background: var(--primary-dark); text-decoration: none; box-shadow: 0 6px 16px rgba(37,99,235,0.25); transform: translateY(-1px); }
.btn:active { transform: translateY(0); box-shadow: 0 1px 2px rgba(37,99,235,0.2); }
.btn.secondary { background: var(--bg); color: var(--text); border-color: var(--border); box-shadow: none; }
.btn.secondary:hover { background: var(--bg-soft); box-shadow: var(--shadow); }
.btn.danger { background: var(--danger); }
.btn.block { width: 100%; }
.btn:disabled { opacity: .5; cursor: not-allowed; transform: none; box-shadow: none; }

/* ================= Forms ================= */
input[type=text], input[type=password], input[type=email], input[type=number], input[type=url], select, textarea {
  width: 100%; padding: 10px 12px; border: 1px solid var(--border); border-radius: var(--radius-sm);
  font-size: 14px; font-family: inherit; background: var(--bg); color: var(--text);
  transition: border-color .15s var(--ease), box-shadow .15s var(--ease);
}
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.12);
}
label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; color: var(--text); }
.field { margin-bottom: 16px; }
.help { font-size: 12px; color: var(--text-muted); margin-top: 4px; }

/* ================= Tables ================= */
table { width: 100%; border-collapse: collapse; font-size: 14px; }
table th, table td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); }
table th { color: var(--text-muted); font-weight: 600; font-size: 12px; text-transform: uppercase; }
table tbody tr { transition: background .15s var(--ease); }
table tbody tr:hover { background: var(--bg-soft); }
.table-scroll { width: 100%; overflow-x: auto; -webkit-overflow-scrolling: touch; }

/* ================= Badges / Alerts ================= */
.badge { display: inline-block; padding: 2px 10px; border-radius: 999px; font-size: 12px; font-weight: 600; }
.badge.active { background: #dcfce7; color: #166534; }
.badge.pending { background: #fef9c3; color: #854d0e; }
.badge.trash, .badge.suspended { background: #fee2e2; color: #991b1b; }

/* ================= Backend / status chips (used on homepage roadmap) ================= */
.backend-chip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg);
  font-weight: 600;
  font-size: 14px;
  transition: transform .2s var(--ease), box-shadow .2s var(--ease), border-color .2s var(--ease);
}
.backend-chip:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: rgba(37,99,235,0.25); }
.backend-chip.is-live { border-color: rgba(22,163,74,0.35); background: linear-gradient(135deg, #f0fdf4, var(--bg)); }

/* Small colored avatar/initial next to each backend name — avoids using real logos */
.backend-icon {
  width: 30px; height: 30px;
  border-radius: 9px;
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 700; font-size: 13px;
  flex-shrink: 0;
}
.backend-icon.gdrive     { background: linear-gradient(135deg, #22c55e, #16a34a); }
.backend-icon.r2         { background: linear-gradient(135deg, #f97316, #ea580c); }
.backend-icon.pixeldrain { background: linear-gradient(135deg, #a855f7, #7e22ce); }
.backend-icon.gofile     { background: linear-gradient(135deg, #14b8a6, #0d9488); }
.backend-icon.tgcloud    { background: linear-gradient(135deg, #38bdf8, #0284c7); }
.backend-icon.instantdl  { background: linear-gradient(135deg, #ec4899, #db2777); }
.backend-icon.transferit { background: linear-gradient(135deg, #6366f1, #4338ca); }
.backend-icon.mega       { background: linear-gradient(135deg, #ef4444, #b91c1c); }

.backend-chip-left { display: flex; align-items: center; gap: 12px; }

/* ================= Highlight banner (e.g. "bring your own Drive") ================= */
.highlight-banner {
  border-radius: var(--radius);
  padding: 28px 28px;
  background: linear-gradient(135deg, rgba(37,99,235,0.08), rgba(124,58,237,0.06));
  border: 1px solid rgba(37,99,235,0.18);
  position: relative;
  overflow: hidden;
}
.highlight-banner::before {
  content: "";
  position: absolute;
  top: -40%; right: -10%;
  width: 220px; height: 220px;
  background: radial-gradient(circle, rgba(37,99,235,0.15), transparent 70%);
  pointer-events: none;
}

/* ================= Code block (developer API preview) ================= */
.code-block {
  background: #0f1115;
  color: #e5e7eb;
  border-radius: var(--radius);
  padding: 18px 20px;
  overflow-x: auto;
  font-family: "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 13px;
  line-height: 1.65;
  box-shadow: var(--shadow-md);
}
.code-block .tok-key { color: #7dd3fc; }
.code-block .tok-str { color: #86efac; }
.code-block .tok-com { color: #6b7280; }
.code-block .tok-met { color: #f0abfc; }

.alert {
  padding: 12px 16px; border-radius: var(--radius-sm); margin-bottom: 16px; font-size: 14px;
  animation: slideIn .25s var(--ease);
}
.alert.error { background: #fee2e2; color: #991b1b; }
.alert.success { background: #dcfce7; color: #166534; }
.alert.info { background: #dbeafe; color: #1e40af; }

@keyframes slideIn {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ================= Hero ================= */
.hero {
  padding: 90px 0 64px;
  text-align: center;
  animation: fadeUp .5s var(--ease);
}
.hero h1 {
  font-size: 44px;
  margin-bottom: 14px;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--text), #4b5563);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero p { color: var(--text-muted); font-size: 18px; max-width: 520px; margin: 0 auto 28px; }

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 560px) {
  .hero { padding: 48px 0 36px; }
  .hero h1 { font-size: 28px; }
  .hero p { font-size: 16px; }
}

/* ================= Scroll-reveal for sections ================= */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .5s var(--ease), transform .5s var(--ease);
}
.reveal.in-view { opacity: 1; transform: translateY(0); }

/* Stagger cards inside a grid so they don't all pop in at once */
.grid .reveal:nth-child(1) { transition-delay: 0s; }
.grid .reveal:nth-child(2) { transition-delay: .08s; }
.grid .reveal:nth-child(3) { transition-delay: .16s; }
.grid .reveal:nth-child(4) { transition-delay: .24s; }

/* Dark mode toggle, used by the admin panel */
body.dark {
  --bg: #0f1115; --bg-soft: #171a21; --border: #262a33; --text: #e5e7eb; --text-muted: #9aa2b1;
  --primary-light: rgba(37,99,235,0.12);
}
body.dark header.site-header { background: rgba(15,17,21,0.75); }
body.dark .hero h1 { background: linear-gradient(135deg, var(--text), #9aa2b1); -webkit-background-clip: text; background-clip: text; }

/* Respect users who've asked for less motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  .reveal { opacity: 1 !important; transform: none !important; }
}