/* =========================================================
   Flip Book System — Gradient Mesh / Orange-Energy Theme
   ========================================================= */

:root {
  --color-bg: #fff7ed;
  --color-surface: #ffffff;
  --color-surface-alt: #fff1e6;
  --color-text: #431407;
  --color-text-muted: #9a5b3c;
  --color-border: #fed7aa;
  --color-primary: #f97316;
  --color-primary-dark: #ea580c;
  --color-primary-light: #fdba74;
  --color-accent: #fb923c;
  --shadow-card: 0 10px 30px -10px rgba(234, 88, 12, 0.25);
  --mesh-1: #fb923c;
  --mesh-2: #f97316;
  --mesh-3: #fdba74;
  --mesh-4: #fde68a;
  --mesh-5: #fb7185;
}

html.dark {
  --color-bg: #1c0f0a;
  --color-surface: #2a160d;
  --color-surface-alt: #351b0f;
  --color-text: #ffedd5;
  --color-text-muted: #d6a17c;
  --color-border: #5a2c14;
  --color-primary: #fb923c;
  --color-primary-dark: #f97316;
  --color-primary-light: #fdba74;
  --color-accent: #f97316;
  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.6);
  --mesh-1: #7c2d12;
  --mesh-2: #9a3412;
  --mesh-3: #431407;
  --mesh-4: #78350f;
  --mesh-5: #7f1d1d;
}

* { box-sizing: border-box; }

body {
  font-family: 'Prompt', 'Segoe UI', sans-serif;
  background-color: var(--color-bg);
  color: var(--color-text);
  transition: background-color .3s ease, color .3s ease;
  min-height: 100vh;
}

/* ---------- Gradient Mesh Background ---------- */
.gradient-mesh-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  background: var(--color-bg);
}
.gradient-mesh-bg::before,
.gradient-mesh-bg::after {
  content: "";
  position: absolute;
  border-radius: 9999px;
  filter: blur(90px);
  opacity: .55;
}
.gradient-mesh-bg::before {
  width: 55vw; height: 55vw;
  top: -15vw; left: -10vw;
  background: radial-gradient(circle at 30% 30%, var(--mesh-1), var(--mesh-2) 60%, transparent 80%);
}
.gradient-mesh-bg::after {
  width: 60vw; height: 60vw;
  bottom: -20vw; right: -15vw;
  background: radial-gradient(circle at 70% 70%, var(--mesh-5), var(--mesh-3) 55%, transparent 80%);
}
.mesh-blob-3 {
  position: fixed;
  width: 40vw; height: 40vw;
  top: 30%; left: 55%;
  border-radius: 9999px;
  filter: blur(100px);
  opacity: .35;
  z-index: -1;
  background: radial-gradient(circle, var(--mesh-4), transparent 70%);
}

/* ---------- Cards / Surfaces ---------- */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 1rem;
  box-shadow: var(--shadow-card);
}
.glass-panel {
  background: color-mix(in srgb, var(--color-surface) 75%, transparent);
  backdrop-filter: blur(14px);
  border: 1px solid var(--color-border);
}

/* ---------- Buttons ---------- */
.btn-gradient {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: white;
  border: none;
  transition: transform .15s ease, box-shadow .15s ease, filter .15s ease;
  box-shadow: 0 6px 18px -6px rgba(234,88,12,.6);
}
.btn-gradient:hover { transform: translateY(-2px); filter: brightness(1.07); }
.btn-gradient:active { transform: translateY(0); }

.btn-outline {
  border: 1.5px solid var(--color-primary);
  color: var(--color-primary-dark);
  background: transparent;
}
html.dark .btn-outline { color: var(--color-primary-light); }
.btn-outline:hover { background: var(--color-primary); color: white; }

/* ---------- Sidebar ---------- */
.sidebar {
  background: linear-gradient(180deg, var(--color-surface), var(--color-surface-alt));
  border-right: 1px solid var(--color-border);
}
.nav-link {
  color: var(--color-text-muted);
  border-radius: .6rem;
  transition: all .15s ease;
}
.nav-link:hover, .nav-link.active {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: white !important;
}

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-thumb { background: var(--color-primary-light); border-radius: 4px; }
::-webkit-scrollbar-track { background: transparent; }

/* ---------- FlipBook Viewer ---------- */
.flipbook-stage {
  perspective: 2500px;
  background: radial-gradient(circle at center, rgba(0,0,0,.05), transparent 70%);
}
.flipbook-page {
  background: white;
  box-shadow: 0 0 25px rgba(0,0,0,.25);
}
.df-book { margin: 0 auto; }

/* ---------- Badges ---------- */
.badge {
  display: inline-flex; align-items: center;
  padding: .15rem .6rem;
  border-radius: 9999px;
  font-size: .72rem;
  font-weight: 600;
}
.badge-published { background: #dcfce7; color: #166534; }
.badge-draft { background: #fef3c7; color: #92400e; }
.badge-archived { background: #e5e7eb; color: #374151; }
html.dark .badge-published { background: #14532d; color: #bbf7d0; }
html.dark .badge-draft { background: #78350f; color: #fde68a; }
html.dark .badge-archived { background: #374151; color: #e5e7eb; }

/* ---------- Chat / Comments ---------- */
.chat-bubble {
  background: var(--color-surface-alt);
  border-radius: 1rem;
  border: 1px solid var(--color-border);
}
.chat-bubble.own {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: white;
}

/* ---------- Calendar ---------- */
.calendar-day {
  border: 1px solid var(--color-border);
  min-height: 90px;
  transition: background .15s ease;
}
.calendar-day:hover { background: var(--color-surface-alt); }
.calendar-day.today { border: 2px solid var(--color-primary); }
.calendar-event {
  font-size: .68rem;
  background: var(--color-primary);
  color: white;
  border-radius: .3rem;
  padding: 1px 5px;
}

/* ---------- Breadcrumb ---------- */
.breadcrumb a { color: var(--color-text-muted); }
.breadcrumb a:hover { color: var(--color-primary-dark); }

/* ---------- Print ---------- */
@media print {
  .no-print { display: none !important; }
  body { background: white !important; color: black !important; }
  .gradient-mesh-bg, .mesh-blob-3 { display: none !important; }
  .print-area { box-shadow: none !important; border: none !important; }
}

/* ---------- Responsive helpers ---------- */
@media (max-width: 768px) {
  .sidebar { position: fixed; z-index: 40; height: 100%; transform: translateX(-100%); transition: transform .25s ease; }
  .sidebar.open { transform: translateX(0); }
}