:root {
  --codex-navy: #1b2144;
  --codex-navy-deep: #131736;
  --codex-navy-light: #262f5a;
  --codex-gold: #fcb900;
  --codex-gold-soft: #ffd35c;
  --codex-ink: #eef0fb;
  --codex-muted: #a7adcf;
  --codex-border: rgba(255, 255, 255, 0.08);
  --bs-body-bg: var(--codex-navy-deep);
  --bs-body-color: var(--codex-ink);
}

body {
  font-family: "Poppins", "Segoe UI", sans-serif;
  background: radial-gradient(circle at top left, #1e2450 0%, var(--codex-navy-deep) 55%);
  min-height: 100vh;
}

a { text-decoration: none; }

.codex-shell {
  display: flex;
  min-height: 100vh;
}

/* ---------- Sidebar ---------- */
.codex-sidebar {
  width: 270px;
  flex-shrink: 0;
  background: linear-gradient(180deg, var(--codex-navy) 0%, var(--codex-navy-deep) 100%);
  border-right: 1px solid var(--codex-border);
  display: flex;
  flex-direction: column;
  padding: 1.5rem 1rem;
  position: sticky;
  top: 0;
  height: 100vh;
}

.codex-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem 0.5rem 1.5rem;
  color: var(--codex-ink);
  font-weight: 600;
  font-size: 0.95rem;
  line-height: 1.2;
  border-bottom: 1px solid var(--codex-border);
  margin-bottom: 1rem;
}

.codex-brand img { height: 42px; width: auto; }

.codex-nav {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  flex: 1;
}

.codex-nav-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.65rem 0.85rem;
  border-radius: 0.6rem;
  color: var(--codex-muted);
  font-weight: 500;
  font-size: 0.92rem;
  transition: background 0.15s ease, color 0.15s ease;
}

.codex-nav-link i { font-size: 1.1rem; width: 1.3rem; text-align: center; }

.codex-nav-link:hover {
  background: rgba(255, 255, 255, 0.06);
  color: var(--codex-ink);
}

.codex-nav-link.active {
  background: linear-gradient(90deg, rgba(252, 185, 0, 0.18), rgba(252, 185, 0, 0.02));
  color: var(--codex-gold-soft);
  border-left: 3px solid var(--codex-gold);
  padding-left: calc(0.85rem - 3px);
}

.codex-sidebar-footer {
  border-top: 1px solid var(--codex-border);
  padding-top: 1rem;
  margin-top: 1rem;
}

.codex-user {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.5rem 0.85rem;
  color: var(--codex-ink);
  font-size: 0.88rem;
  font-weight: 500;
}

/* ---------- Main content ---------- */
.codex-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  max-width: 100%;
}

.codex-content {
  flex: 1;
  padding: 2rem 2.5rem 1rem;
}

.codex-footer {
  margin-top: auto;
  padding: 1.1rem 2.5rem;
  border-top: 1px solid var(--codex-border);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  font-size: 0.82rem;
  color: var(--codex-muted);
  letter-spacing: 0.02em;
}

.codex-footer span:first-child {
  color: var(--codex-gold-soft);
  font-weight: 600;
}

.codex-footer-dot { color: var(--codex-gold); }

.codex-footer a {
  color: var(--codex-muted);
  transition: color 0.15s ease;
}
.codex-footer a:hover { color: var(--codex-gold-soft); }

.codex-guest-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.codex-footer--guest {
  border-top: none;
  padding-bottom: 2rem;
}

.codex-flash-stack { margin-bottom: 1rem; }
.codex-flash-stack--login {
  max-width: 420px;
  margin: 1.5rem auto -0.5rem;
}

.codex-page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.codex-page-title {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 600;
  font-size: 1.5rem;
}

.codex-page-title i { color: var(--codex-gold); }

.codex-breadcrumb a { color: var(--codex-muted); }
.codex-breadcrumb a:hover { color: var(--codex-gold-soft); }

.btn-codex {
  background: var(--codex-gold);
  border: none;
  color: #1a1a1a;
  font-weight: 600;
}
.btn-codex:hover { background: var(--codex-gold-soft); color: #1a1a1a; }

/* ---------- Grid of folders/files ---------- */
.codex-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
  gap: 1rem;
}

.codex-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--codex-border);
  border-radius: 0.85rem;
  padding: 0.9rem;
  cursor: pointer;
  transition: transform 0.12s ease, border-color 0.12s ease, background 0.12s ease;
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.codex-card:hover {
  transform: translateY(-3px);
  border-color: rgba(252, 185, 0, 0.4);
  background: rgba(255, 255, 255, 0.05);
}

.codex-card-thumb {
  height: 120px;
  border-radius: 0.6rem;
  background: var(--codex-navy-light);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.codex-card-thumb img,
.codex-card-thumb canvas {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.codex-card-thumb i { font-size: 2.6rem; color: var(--codex-gold); }

.codex-card-folder .codex-card-thumb i { color: var(--codex-gold-soft); font-size: 3rem; }

.codex-card-label {
  font-size: 0.85rem;
  font-weight: 500;
  word-break: break-word;
  line-height: 1.25;
}

.codex-card-meta {
  font-size: 0.72rem;
  color: var(--codex-muted);
}

.codex-card-menu {
  position: absolute;
  top: 0.4rem;
  right: 0.4rem;
}

.codex-card-menu .btn {
  padding: 0.15rem 0.45rem;
  color: var(--codex-muted);
  border: none;
  background: transparent;
}

.codex-empty-state {
  text-align: center;
  padding: 4rem 1rem;
  color: var(--codex-muted);
}
.codex-empty-state i { font-size: 3rem; color: var(--codex-gold); margin-bottom: 1rem; display: block; }

/* ---------- Login page ---------- */
.codex-login-wrap {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.codex-login-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--codex-border);
  border-radius: 1rem;
  padding: 2.5rem;
  width: 100%;
  max-width: 400px;
  text-align: center;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
}

.codex-login-card img { height: 90px; margin-bottom: 1rem; }
.codex-login-card h1 { font-size: 1.3rem; font-weight: 700; margin-bottom: 0.25rem; }
.codex-login-card p.subtitle { color: var(--codex-muted); font-size: 0.88rem; margin-bottom: 1.75rem; }

.form-control, .form-select {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--codex-border);
  color: var(--codex-ink);
}
.form-control:focus, .form-select:focus {
  background: rgba(255, 255, 255, 0.06);
  border-color: var(--codex-gold);
  color: var(--codex-ink);
  box-shadow: 0 0 0 0.2rem rgba(252, 185, 0, 0.15);
}

.table { color: var(--codex-ink); }
.modal-content { background: var(--codex-navy); border: 1px solid var(--codex-border); }

#previewModal .modal-body {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  background: #0d0f22;
}
#previewModal img { max-width: 100%; max-height: 75vh; object-fit: contain; }
#previewModal iframe { width: 100%; height: 75vh; border: none; background: #fff; }

.codex-admin-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--codex-border);
  border-radius: 0.85rem;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

@media (max-width: 860px) {
  .codex-shell { flex-direction: column; }
  .codex-sidebar { width: 100%; height: auto; position: relative; }
  .codex-main { padding: 1.25rem; }
}