:root {
  --bg: #0b0e14;
  --bg-soft: #11151d;
  --surface: #161b26;
  --surface-light: #1f2531;
  --border: #262d3b;
  --text: #eef1f6;
  --text-dim: #9aa4b5;
  --accent: #4f8cff;
  --accent-2: #7c5cff;
  --accent-soft: rgba(79, 140, 255, 0.12);
  --success: #36c98f;
  --danger: #ff5d6c;
  --radius: 14px;
  --shadow: 0 20px 60px -20px rgba(0, 0, 0, 0.6);
}

* { box-sizing: border-box; }

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

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-2); }

.container { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

/* --- Navbar --- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  background: rgba(11, 14, 20, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.navbar .brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; color: var(--text); }
.navbar .brand .dot { width: 10px; height: 10px; border-radius: 50%; background: linear-gradient(135deg, var(--accent), var(--accent-2)); box-shadow: 0 0 16px var(--accent); }
.navbar nav { display: flex; gap: 22px; align-items: center; }
.navbar nav a { color: var(--text-dim); font-weight: 500; font-size: 14px; }
.navbar nav a.active, .navbar nav a:hover { color: var(--text); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 22px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 14px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, opacity 0.15s ease;
}
.btn-primary { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #fff; box-shadow: 0 10px 24px -8px rgba(79, 140, 255, 0.5); }
.btn-primary:hover { transform: translateY(-1px); }
.btn-ghost { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn-ghost:hover { border-color: var(--accent); }
.btn-danger { background: rgba(255, 93, 108, 0.12); color: var(--danger); border: 1px solid rgba(255, 93, 108, 0.3); }
.btn-block { width: 100%; }
.btn-sm { padding: 7px 14px; font-size: 13px; }

/* --- Hero --- */
.hero { padding: 96px 0 72px; text-align: center; position: relative; overflow: hidden; }
.hero::before {
  content: "";
  position: absolute; inset: -40% -10% auto -10%; height: 600px;
  background: radial-gradient(circle at 50% 0%, rgba(79, 140, 255, 0.25), transparent 60%);
  pointer-events: none;
}
.hero .badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--accent-soft); color: var(--accent);
  padding: 6px 14px; border-radius: 999px; font-size: 13px; font-weight: 600;
  margin-bottom: 22px;
}
.hero h1 { font-size: 48px; line-height: 1.1; margin: 0 0 18px; font-weight: 800; letter-spacing: -0.02em; }
.hero h1 span { background: linear-gradient(135deg, var(--accent), var(--accent-2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p { max-width: 620px; margin: 0 auto 34px; color: var(--text-dim); font-size: 17px; }
.hero .actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* --- Feature grid --- */
.section { padding: 64px 0; }
.section-title { text-align: center; max-width: 620px; margin: 0 auto 48px; }
.section-title h2 { font-size: 32px; margin: 0 0 12px; font-weight: 800; }
.section-title p { color: var(--text-dim); }

.grid { display: grid; gap: 20px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 860px) { .grid-3, .grid-2 { grid-template-columns: 1fr; } .hero h1 { font-size: 34px; } }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
}
.feature-card .icon {
  width: 46px; height: 46px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  background: var(--accent-soft); color: var(--accent); margin-bottom: 18px; font-size: 22px;
}
.feature-card h3 { margin: 0 0 10px; font-size: 18px; }
.feature-card p { color: var(--text-dim); font-size: 14.5px; margin: 0; }

/* --- Trust banner --- */
.trust-banner {
  display: flex; align-items: center; gap: 18px; flex-wrap: wrap;
  background: linear-gradient(135deg, rgba(79,140,255,0.1), rgba(124,92,255,0.1));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 30px;
}
.trust-banner .lock { font-size: 30px; }
.trust-banner strong { display: block; margin-bottom: 4px; }
.trust-banner span { color: var(--text-dim); font-size: 14px; }

/* --- Auth forms --- */
.auth-wrap { min-height: calc(100vh - 76px); display: flex; align-items: center; justify-content: center; padding: 48px 24px; }
.auth-card { width: 100%; max-width: 420px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 36px; box-shadow: var(--shadow); }
.auth-card h1 { font-size: 24px; margin: 0 0 6px; }
.auth-card .sub { color: var(--text-dim); font-size: 14px; margin-bottom: 26px; }

.field { margin-bottom: 16px; }
.field label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; color: var(--text-dim); }
.field input {
  width: 100%; padding: 12px 14px; border-radius: 10px;
  background: var(--bg-soft); border: 1px solid var(--border); color: var(--text); font-size: 14px;
}
.field input:focus { outline: none; border-color: var(--accent); }
.field small { color: var(--text-dim); font-size: 12px; }

.alert { padding: 12px 14px; border-radius: 10px; font-size: 14px; margin-bottom: 18px; }
.alert-error { background: rgba(255, 93, 108, 0.1); color: var(--danger); border: 1px solid rgba(255,93,108,0.25); }
.alert-success { background: rgba(54, 201, 143, 0.1); color: var(--success); border: 1px solid rgba(54,201,143,0.25); }

.auth-card .switch { text-align: center; margin-top: 20px; font-size: 14px; color: var(--text-dim); }

/* --- Dashboard --- */
.dash-grid { display: grid; grid-template-columns: 280px 1fr; gap: 24px; align-items: start; }
@media (max-width: 900px) { .dash-grid { grid-template-columns: 1fr; } }

.quota-card .bar { height: 10px; border-radius: 6px; background: var(--surface-light); overflow: hidden; margin: 14px 0 8px; }
.quota-card .bar-fill { height: 100%; background: linear-gradient(90deg, var(--accent), var(--accent-2)); }
.quota-card .stat { font-size: 13px; color: var(--text-dim); }

.app-link {
  display: flex; align-items: center; gap: 14px;
  background: var(--surface); border: 1px solid var(--border); border-radius: 12px;
  padding: 16px; margin-bottom: 12px; transition: border-color 0.15s ease;
}
.app-link:hover { border-color: var(--accent); }
.app-link .ic { font-size: 26px; }
.app-link strong { display: block; color: var(--text); font-size: 15px; }
.app-link span { color: var(--text-dim); font-size: 13px; }

.album-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 14px; }
.album-card { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; overflow: hidden; }
.album-card .thumb { width: 100%; aspect-ratio: 1/1; background: var(--surface-light); display: flex; align-items: center; justify-content: center; color: var(--text-dim); font-size: 28px; }
.album-card .meta { padding: 10px 12px; }
.album-card .meta strong { display: block; font-size: 13.5px; }
.album-card .meta span { font-size: 12px; color: var(--text-dim); }

/* --- File table --- */
.file-table { width: 100%; border-collapse: collapse; }
.file-table th, .file-table td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--border); font-size: 14px; }
.file-table th { color: var(--text-dim); font-weight: 600; font-size: 12.5px; text-transform: uppercase; letter-spacing: 0.04em; }
.file-table tr:hover td { background: var(--surface-light); }
.upload-box { border: 1.5px dashed var(--border); border-radius: 12px; padding: 28px; text-align: center; margin-bottom: 24px; }
.upload-box input[type="file"] { margin: 14px 0; color: var(--text-dim); }

/* --- Guide --- */
.guide-nav { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 40px; }
.guide-nav a { background: var(--surface); border: 1px solid var(--border); padding: 8px 14px; border-radius: 999px; font-size: 13px; }
.guide-step { display: flex; gap: 18px; padding: 22px 0; border-bottom: 1px solid var(--border); }
.guide-step .num { flex: none; width: 36px; height: 36px; border-radius: 10px; background: var(--accent-soft); color: var(--accent); display: flex; align-items: center; justify-content: center; font-weight: 700; }
.guide-step h3 { margin: 0 0 6px; font-size: 16.5px; }
.guide-step p { margin: 0; color: var(--text-dim); font-size: 14.5px; }
.guide-block { margin-bottom: 56px; }
.guide-block > h2 { font-size: 24px; margin-bottom: 6px; }
.guide-block > .desc { color: var(--text-dim); margin-bottom: 8px; }

/* --- Footer --- */
.footer { border-top: 1px solid var(--border); padding: 40px 0; color: var(--text-dim); font-size: 13.5px; text-align: center; }
.footer a { color: var(--text-dim); }

.empty-state { text-align: center; padding: 60px 20px; color: var(--text-dim); }
.empty-state .ic { font-size: 40px; margin-bottom: 12px; }