* { box-sizing: border-box; }
:root {
  --bg-0: #0a0b10;
  --bg-1: #11131a;
  --bg-2: #181b25;
  --bg-3: #21252f;
  --border: #2a2e3a;
  --border-light: #353a47;
  --fg-0: #f5f7fa;
  --fg-1: #c5cad6;
  --fg-2: #8b91a3;
  --fg-3: #5b6072;
  --accent: #6366f1;
  --accent-hover: #5558e3;
  --accent-soft: rgba(99, 102, 241, 0.15);
  --green: #10b981;
  --yellow: #f59e0b;
  --red: #ef4444;
  --blue: #3b82f6;
  --purple: #a855f7;
  --pink: #ec4899;
  --gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 50%, #ec4899 100%);
}

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg-0);
  color: var(--fg-0);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 14px;
  min-height: 100vh;
}

a { color: inherit; text-decoration: none; }

/* ---------- Layout ---------- */

body {
  display: grid;
  grid-template-columns: 240px 1fr;
  min-height: 100vh;
}

.sidebar {
  background: var(--bg-1);
  border-right: 1px solid var(--border);
  padding: 20px 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  position: sticky;
  top: 0;
  height: 100vh;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 4px 20px;
}

.logo {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: var(--gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 15px;
  color: white;
  letter-spacing: -0.5px;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.brand-title { font-weight: 600; font-size: 14px; }
.brand-sub { font-size: 11px; color: var(--fg-3); margin-top: 2px; }

.nav { display: flex; flex-direction: column; gap: 2px; }

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border-radius: 8px;
  font-size: 13px;
  color: var(--fg-2);
  cursor: pointer;
  transition: all 0.15s;
}
.nav-item:hover { background: var(--bg-2); color: var(--fg-0); }
.nav-item.active {
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 500;
}
.nav-item svg { width: 16px; height: 16px; flex-shrink: 0; }

.sidebar-footer { margin-top: auto; padding-top: 12px; border-top: 1px solid var(--border); }

.ghost-btn {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  background: transparent;
  border: none;
  border-radius: 8px;
  color: var(--fg-2);
  font-size: 13px;
  cursor: pointer;
}
.ghost-btn:hover { background: var(--bg-2); color: var(--fg-0); }
.ghost-btn svg { width: 16px; height: 16px; }

/* ---------- Content ---------- */

.content {
  padding: 0;
  overflow-x: hidden;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 32px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-0);
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(12px);
}

.title { font-size: 18px; font-weight: 600; }

.topbar-actions { display: flex; gap: 8px; }

.tab { display: none; padding: 24px 32px; }
.tab.active { display: block; }

/* ---------- Buttons ---------- */

.btn-primary, .btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border: none;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
}
.btn-primary {
  background: var(--accent);
  color: white;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}
.btn-primary:hover { background: var(--accent-hover); transform: translateY(-1px); }
.btn-secondary {
  background: var(--bg-2);
  color: var(--fg-1);
  border: 1px solid var(--border);
}
.btn-secondary:hover { background: var(--bg-3); border-color: var(--border-light); }
.btn-secondary svg { width: 14px; height: 14px; }
.btn-danger {
  background: rgba(239, 68, 68, 0.12);
  color: var(--red);
  border: 1px solid rgba(239, 68, 68, 0.3);
}
.btn-danger:hover { background: rgba(239, 68, 68, 0.2); }
.btn-row { display: flex; gap: 8px; margin-top: 10px; }

/* ---------- Card ---------- */

.card {
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px 20px;
  margin-bottom: 16px;
}

.card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}
.card-head h3 { margin: 0; font-size: 14px; font-weight: 600; }
.hint { font-size: 12px; color: var(--fg-3); }
.badge {
  background: var(--bg-2);
  border: 1px solid var(--border);
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 11px;
  color: var(--fg-2);
}

/* ---------- Grid ---------- */

.grid { display: grid; gap: 16px; margin-bottom: 16px; }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 1100px) { .grid-4 { grid-template-columns: repeat(2, 1fr); } }

/* ---------- Stat Card ---------- */

.stat-card { padding: 18px 20px; }
.stat-label {
  font-size: 12px;
  color: var(--fg-3);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}
.stat-value {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.5px;
}
.stat-foot { font-size: 11px; color: var(--fg-3); margin-top: 4px; }
.gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------- Account Cards ---------- */

.account-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 12px;
}
.account-card {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px;
  position: relative;
  overflow: hidden;
}
.account-card .avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--bg-3);
  margin-bottom: 8px;
}
.account-card .acct-email {
  font-size: 13px;
  font-weight: 500;
  color: var(--fg-0);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.account-card .acct-name { font-size: 11px; color: var(--fg-3); margin-bottom: 8px; }
.credits-bar {
  height: 6px;
  background: var(--bg-3);
  border-radius: 3px;
  overflow: hidden;
  margin-top: 8px;
}
.credits-bar-fill {
  height: 100%;
  background: var(--gradient);
  border-radius: 3px;
  transition: width 0.3s;
}
.credits-meta {
  display: flex;
  justify-content: space-between;
  margin-top: 6px;
  font-size: 11px;
  color: var(--fg-2);
}
.credits-meta strong { color: var(--fg-0); }
.status-chip {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.status-active { background: rgba(16, 185, 129, 0.15); color: var(--green); }
.status-exhausted { background: rgba(245, 158, 11, 0.15); color: var(--yellow); }
.status-invalid { background: rgba(239, 68, 68, 0.15); color: var(--red); }

/* ---------- Table ---------- */

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
.table th {
  text-align: left;
  padding: 10px 12px;
  font-weight: 500;
  color: var(--fg-3);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--border);
}
.table td {
  padding: 12px;
  border-bottom: 1px solid var(--border);
  color: var(--fg-1);
}
.table tbody tr:hover { background: rgba(255, 255, 255, 0.02); }
.mono { font-family: "SF Mono", Consolas, monospace; font-size: 12px; color: var(--fg-2); }

/* ---------- Form ---------- */

.textarea, input[type=text], input[type=password], input[type=number], select {
  width: 100%;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  color: var(--fg-0);
  font-size: 13px;
  font-family: inherit;
  transition: border-color 0.15s;
}
.textarea:focus, input:focus, select:focus {
  outline: none;
  border-color: var(--accent);
}
.textarea { font-family: "SF Mono", Consolas, monospace; font-size: 12px; resize: vertical; }

.form-row { display: flex; flex-direction: column; gap: 12px; }
.form-row label { display: flex; flex-direction: column; gap: 4px; font-size: 12px; color: var(--fg-2); }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

.config-form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 16px;
}
@media (max-width: 900px) { .config-form { grid-template-columns: 1fr; } }
.config-field { display: flex; flex-direction: column; gap: 4px; }
.config-field label { font-size: 11px; color: var(--fg-3); text-transform: uppercase; letter-spacing: 0.05em; }

/* ---------- Playground result ---------- */

.pg-result {
  margin-top: 16px;
  padding: 14px;
  background: var(--bg-2);
  border-radius: 8px;
  font-size: 12px;
  font-family: "SF Mono", Consolas, monospace;
  color: var(--fg-1);
  white-space: pre-wrap;
  word-break: break-all;
  max-height: 400px;
  overflow: auto;
  display: none;
}
.pg-result.show { display: block; }
.pg-result img, .pg-result video { max-width: 100%; border-radius: 8px; margin-top: 10px; }

/* ---------- Char grid ---------- */

.char-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 12px;
}
.char-grid .char-card {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  transition: transform 0.15s;
}
.char-grid .char-card:hover { transform: translateY(-2px); border-color: var(--border-light); }
.char-grid img { width: 100%; aspect-ratio: 1; object-fit: cover; display: block; }
.char-grid .char-meta { padding: 10px 12px; font-size: 12px; }
.char-grid .char-meta b { display: block; margin-bottom: 4px; }

/* ---------- Model grid ---------- */

.model-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 10px;
}
.model-card {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
}
.model-card .model-kind {
  display: inline-block;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  margin-bottom: 6px;
}
.kind-image { background: rgba(99, 102, 241, 0.15); color: var(--accent); }
.kind-video { background: rgba(168, 85, 247, 0.15); color: var(--purple); }
.kind-character_create, .kind-character_image, .kind-character_video, .kind-character_swap, .kind-character_edit { background: rgba(236, 72, 153, 0.15); color: var(--pink); }
.model-name { font-size: 13px; font-weight: 500; margin-bottom: 4px; word-break: break-all; }
.model-desc { font-size: 11px; color: var(--fg-3); line-height: 1.4; }

/* ---------- Code ---------- */

.code {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px;
  font-size: 11px;
  font-family: "SF Mono", Consolas, monospace;
  color: var(--fg-1);
  overflow: auto;
  max-height: 400px;
  white-space: pre-wrap;
  word-break: break-all;
}

/* ---------- Toast ---------- */

.toast-box {
  position: fixed;
  bottom: 24px;
  right: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 1000;
}
.toast {
  background: var(--bg-2);
  border: 1px solid var(--border-light);
  border-radius: 8px;
  padding: 10px 14px;
  font-size: 13px;
  color: var(--fg-0);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
  animation: slide-in 0.2s ease-out;
}
.toast.success { border-left: 3px solid var(--green); }
.toast.error { border-left: 3px solid var(--red); }
.toast.info { border-left: 3px solid var(--blue); }

@keyframes slide-in {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* ---------- Login page ---------- */

body.login {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background:
    radial-gradient(circle at 20% 50%, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(236, 72, 153, 0.1) 0%, transparent 50%),
    var(--bg-0);
}
body.login form {
  background: var(--bg-1);
  border: 1px solid var(--border);
  padding: 32px 36px;
  border-radius: 14px;
  width: 360px;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.4);
}
body.login .login-logo {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  background: var(--gradient);
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: white;
  font-size: 18px;
  box-shadow: 0 8px 20px rgba(99, 102, 241, 0.4);
}
body.login h1 { margin: 0 0 4px; font-size: 22px; font-weight: 700; }
body.login p { margin: 0 0 22px; color: var(--fg-2); font-size: 13px; }
body.login input { margin-bottom: 12px; padding: 11px 14px; }
body.login button {
  width: 100%;
  padding: 11px;
  background: var(--gradient);
  border: none;
  border-radius: 8px;
  color: white;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.15s;
}
body.login button:hover { opacity: 0.9; }
body.login #msg { margin-top: 12px; color: var(--red); font-size: 12px; }

/* ---------- Scrollbar ---------- */

::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--border-light); }