/* ============================
   coffai.cyou — Prompt Library
   ============================ */

:root {
  --bg: #0d1117;
  --bg-card: #161b22;
  --bg-hover: #1c2333;
  --bg-sidebar: #0d1117;
  --bg-input: #161b22;
  --border: #30363d;
  --border-light: #21262d;
  --text: #e6edf3;
  --text-dim: #8b949e;
  --text-muted: #6e7681;
  --accent: #d4a056;
  --accent-hover: #e2b46a;
  --accent-bg: rgba(212,160,86,0.1);
  --accent-glow: rgba(212,160,86,0.15);
  --radius: 10px;
  --radius-sm: 6px;
  --radius-lg: 14px;
  --shadow: rgba(0,0,0,0.5);
  --sidebar-w: 220px;
  --header-h: 60px;
  --transition: 0.2s ease;
}

/* Category theme colors */
[data-cat-theme="人物"] { --cat-color: #58a6ff; --cat-bg: rgba(88,166,255,0.12); }
[data-cat-theme="服装"] { --cat-color: #f0883e; --cat-bg: rgba(240,136,62,0.12); }
[data-cat-theme="景别"] { --cat-color: #3fb950; --cat-bg: rgba(63,185,80,0.12); }
[data-cat-theme="构图"] { --cat-color: #a371f7; --cat-bg: rgba(163,113,247,0.12); }
[data-cat-theme="光影"] { --cat-color: #f7c843; --cat-bg: rgba(247,200,67,0.12); }
[data-cat-theme="动作"] { --cat-color: #f78166; --cat-bg: rgba(247,129,102,0.12); }
[data-cat-theme="风格"] { --cat-color: #ff7b72; --cat-bg: rgba(255,123,114,0.12); }

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}

body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.6;
  min-height:100vh;
}

/* ===== Sidebar ===== */
.sidebar{
  position:fixed;
  left:0;
  top:0;
  bottom:0;
  width:var(--sidebar-w);
  background:var(--bg-sidebar);
  border-right:1px solid var(--border);
  z-index:50;
  display:flex;
  flex-direction:column;
  overflow-y:auto;
  padding:0 12px;
  transition:transform var(--transition);
}

.sidebar-header{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:16px 4px 12px;
  border-bottom:1px solid var(--border-light);
  margin-bottom:12px;
}

.sidebar .logo{
  font-size:18px;
  font-weight:700;
  color:var(--accent);
}

.sidebar-close{display:none;background:none;border:none;color:var(--text-dim);font-size:20px;cursor:pointer}

/* Media switch */
.media-switch{
  display:flex;
  background:var(--bg-input);
  border-radius:var(--radius-sm);
  padding:3px;
  margin-bottom:12px;
}

.media-btn{
  flex:1;
  padding:6px 8px;
  border:none;
  background:transparent;
  color:var(--text-dim);
  font-size:12px;
  border-radius:4px;
  cursor:pointer;
  transition:all var(--transition);
}

.media-btn.active{
  background:var(--accent);
  color:#0d1117;
  font-weight:600;
}

/* Sidebar sections */
.sidebar-section{margin-bottom:14px}
.sidebar-label{
  font-size:11px;
  font-weight:600;
  text-transform:uppercase;
  letter-spacing:0.5px;
  color:var(--text-muted);
  margin-bottom:6px;
  padding:0 4px;
}

.filter-chips{
  display:flex;
  flex-wrap:wrap;
  gap:4px;
}

.chip{
  padding:4px 10px;
  border:1px solid var(--border);
  border-radius:14px;
  background:transparent;
  color:var(--text-dim);
  font-size:12px;
  cursor:pointer;
  transition:all var(--transition);
}

.chip:hover{
  border-color:var(--accent-dim, #8a7040);
  color:var(--text);
}

.chip.active{
  background:var(--accent-bg);
  border-color:var(--accent);
  color:var(--accent);
  font-weight:500;
}

.chip.model-chip{
  border-color:var(--border-light);
}

.chip.model-chip.active{
  background:rgba(88,166,255,0.12);
  border-color:#58a6ff;
  color:#58a6ff;
}

/* Tags cloud - smaller */
.tags-cloud .chip{
  font-size:11px;
  padding:3px 8px;
}

/* Sidebar nav */
.sidebar-nav{
  margin-top:auto;
  padding:12px 0 16px;
}

.nav-link{
  display:block;
  width:100%;
  padding:8px 10px;
  border:none;
  border-radius:var(--radius-sm);
  background:transparent;
  color:var(--text-dim);
  font-size:13px;
  text-align:left;
  cursor:pointer;
  transition:all var(--transition);
}

.nav-link:hover{
  background:var(--bg-hover);
  color:var(--text);
}

/* Sidebar overlay (mobile) */
.sidebar-overlay{
  display:none;
  position:fixed;
  inset:0;
  z-index:49;
  background:rgba(0,0,0,0.5);
}

/* ===== Main Content ===== */
.main-content{
  margin-left:var(--sidebar-w);
  min-height:100vh;
}

/* ===== Header ===== */
.header{
  position:sticky;
  top:0;
  z-index:30;
  height:var(--header-h);
  background:rgba(13,17,23,0.85);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--border);
  display:flex;
  align-items:center;
  padding:0 20px;
  gap:16px;
}

.header-left{
  display:flex;
  align-items:center;
  gap:8px;
}

.hamburger{
  display:none;
  background:none;
  border:none;
  color:var(--text);
  font-size:22px;
  cursor:pointer;
  padding:4px;
}

.desktop-hidden{display:none}

.header-center{flex:1;max-width:480px}
.header-right{display:flex;align-items:center;gap:10px}

.search-wrap{
  position:relative;
  width:100%;
}

.search-wrap input{
  width:100%;
  padding:8px 12px 8px 34px;
  border:1px solid var(--border);
  border-radius:20px;
  background:var(--bg-input);
  color:var(--text);
  font-size:13px;
  outline:none;
  transition:border var(--transition);
}

.search-wrap input:focus{border-color:var(--accent)}
.search-wrap input::placeholder{color:var(--text-muted)}
.search-icon{position:absolute;left:11px;top:50%;transform:translateY(-50%);color:var(--text-muted);font-size:14px;pointer-events:none}

.stats-badge{
  font-size:12px;
  color:var(--text-dim);
  background:var(--bg-input);
  padding:4px 12px;
  border-radius:12px;
  white-space:nowrap;
}

/* ===== Prompt Grid ===== */
.prompt-grid{
  padding:20px;
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(320px,1fr));
  gap:16px;
}

/* ===== Prompt Card ===== */
.prompt-card{
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius);
  overflow:hidden;
  cursor:pointer;
  transition:all var(--transition);
}

.prompt-card:hover{
  border-color:var(--accent);
  transform:translateY(-3px);
  box-shadow:0 8px 30px var(--shadow);
}

/* Card preview image area */
.card-image{
  width:100%;
  height:200px;
  background:var(--bg-hover);
  overflow:hidden;
  position:relative;
  display:flex;
  align-items:center;
  justify-content:center;
}

.card-image img{
  width:100%;
  height:100%;
  object-fit:cover;
}

.card-image-placeholder{
  width:100%;
  height:100%;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  font-size:40px;
  position:relative;
}

.card-image-placeholder .cat-icon{font-size:48px;opacity:0.6}
.card-image-placeholder .sub-label{
  position:absolute;
  bottom:8px;
  font-size:11px;
  color:var(--text-muted);
  background:var(--bg-card);
  padding:2px 10px;
  border-radius:8px;
  opacity:0.8;
}

/* Card body */
.card-body{padding:14px 16px 12px}

.card-header{
  display:flex;
  justify-content:space-between;
  align-items:flex-start;
  margin-bottom:6px;
}

.card-title{
  font-size:14px;
  font-weight:600;
  line-height:1.3;
  color:var(--text);
}

.card-cat-badge{
  font-size:10px;
  padding:2px 8px;
  border-radius:8px;
  white-space:nowrap;
  flex-shrink:0;
  margin-left:8px;
  color:var(--cat-color, var(--accent));
  background:var(--cat-bg, var(--accent-bg));
}

.card-tags{
  display:flex;
  flex-wrap:wrap;
  gap:4px;
  margin-bottom:8px;
}

.card-tag{
  font-size:10px;
  padding:1px 6px;
  border-radius:6px;
  background:rgba(255,255,255,0.04);
  color:var(--text-muted);
}

.card-tag.model-tag{
  background:rgba(88,166,255,0.08);
  color:#58a6ff;
}

.card-preview{
  font-size:12px;
  color:var(--text-dim);
  line-height:1.5;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}

.card-footer{
  display:flex;
  justify-content:space-between;
  align-items:center;
  padding:10px 16px 12px;
  font-size:11px;
  color:var(--text-muted);
  border-top:1px solid var(--border-light);
}

.copy-btn{
  padding:4px 12px;
  border:none;
  border-radius:4px;
  background:var(--bg-hover);
  color:var(--text-dim);
  font-size:11px;
  cursor:pointer;
  transition:all var(--transition);
}

.copy-btn:hover{
  background:var(--accent);
  color:#0d1117;
}

.copy-btn.copied{
  background:#3fb950;
  color:#fff;
}

/* ===== Modal ===== */
.modal-overlay{
  display:none;
  position:fixed;
  inset:0;
  z-index:999;
  background:rgba(0,0,0,0.7);
  backdrop-filter:blur(6px);
  -webkit-backdrop-filter:blur(6px);
  padding:20px;
  overflow-y:auto;
}

.modal-overlay.open{
  display:flex;
  align-items:flex-start;
  justify-content:center;
  padding-top:40px;
}

.modal{
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  max-width:700px;
  width:100%;
  padding:28px;
  position:relative;
  animation:modalIn 0.25s ease;
}

@keyframes modalIn{
  from{opacity:0;transform:translateY(24px) scale(0.97)}
  to{opacity:1;transform:translateY(0) scale(1)}
}

.modal-close{
  position:absolute;
  top:14px;
  right:18px;
  background:none;
  border:none;
  color:var(--text-muted);
  font-size:22px;
  cursor:pointer;
  line-height:1;
  padding:4px;
  transition:color var(--transition);
}
.modal-close:hover{color:var(--text)}

.modal-image{
  width:100%;
  max-height:400px;
  object-fit:cover;
  border-radius:var(--radius-sm);
  margin-bottom:18px;
  background:var(--bg-hover);
}

.modal-image-placeholder{
  width:100%;
  height:200px;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:56px;
  background:var(--bg-hover);
  border-radius:var(--radius-sm);
  margin-bottom:18px;
  color:var(--text-muted);
}

.modal-title{
  font-size:20px;
  font-weight:700;
  margin-bottom:4px;
  padding-right:32px;
}

.modal-meta{
  display:flex;
  flex-wrap:wrap;
  gap:6px;
  margin-bottom:16px;
  font-size:12px;
  color:var(--text-muted);
}

.modal-meta span{
  display:inline-flex;
  align-items:center;
  gap:4px;
  background:var(--bg);
  padding:2px 8px;
  border-radius:6px;
}

.modal-section{
  margin-bottom:16px;
}

.modal-section-title{
  font-size:11px;
  font-weight:600;
  text-transform:uppercase;
  letter-spacing:0.5px;
  color:var(--text-muted);
  margin-bottom:6px;
}

.prompt-text-block{
  background:var(--bg);
  border:1px solid var(--border-light);
  border-radius:var(--radius-sm);
  padding:14px;
  font-size:12.5px;
  line-height:1.6;
  color:var(--text-dim);
  word-break:break-word;
  position:relative;
  font-family:'SF Mono','Cascadia Code','Consolas',monospace;
}

.prompt-text-block .copy-btn{
  position:absolute;
  top:8px;
  right:8px;
  font-family:inherit;
}

.modal-params{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(100px,1fr));
  gap:6px;
}

.param-item{
  background:var(--bg-hover);
  padding:6px 10px;
  border-radius:var(--radius-sm);
}

.param-item label{
  font-size:9px;
  color:var(--text-muted);
  text-transform:uppercase;
  display:block;
  margin-bottom:1px;
}

.param-item span{
  font-size:12px;
  font-weight:500;
  color:var(--accent);
}

/* ===== Empty State ===== */
.empty-state{
  grid-column:1/-1;
  text-align:center;
  padding:80px 20px;
  color:var(--text-muted);
}
.empty-state .big-icon{font-size:56px;margin-bottom:12px;opacity:0.4}
.empty-state p{font-size:14px}

/* ===== Toast ===== */
.toast{
  position:fixed;
  bottom:24px;
  left:50%;
  transform:translateX(-50%) translateY(80px);
  background:var(--bg-card);
  border:1px solid var(--border);
  padding:10px 20px;
  border-radius:var(--radius-sm);
  font-size:13px;
  color:var(--text);
  opacity:0;
  transition:all 0.3s ease;
  pointer-events:none;
  z-index:9999;
}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* ===== Responsive ===== */
@media(max-width:900px){
  .sidebar{transform:translateX(-100%)}
  .sidebar.open{transform:translateX(0)}
  .sidebar-overlay.open{display:block}
  .sidebar-close{display:block}
  .main-content{margin-left:0}
  .hamburger{display:block}
  .desktop-hidden{display:block}
  .header .logo.desktop-hidden{font-size:16px;color:var(--accent);font-weight:700}
  .prompt-grid{grid-template-columns:repeat(auto-fill,minmax(280px,1fr));padding:14px}
}

@media(max-width:640px){
  .header{padding:0 12px;gap:8px}
  .prompt-grid{grid-template-columns:1fr;padding:12px;gap:12px}
  .card-image{height:180px}
  .modal{padding:20px;margin-top:10px}
}

@media(min-width:901px){
  .sidebar{transform:translateX(0)!important}
}