:root {
  --bg: #fafafa;
  --bg-accent: #f4f4f5;
  --panel: #ffffff;
  --panel-strong: #fafafa;
  --border: #e4e4e7;
  --border-strong: #d4d4d8;
  --text: #09090b;
  --text-secondary: #52525b;
  --muted: #a1a1aa;
  
  --brand: #18181b;
  --brand-hover: #27272a;
  --brand-soft: #f4f4f5;
  
  --ok: #ecfdf5;
  --ok-text: #059669;
  --warn: #fffbeb;
  --warn-text: #d97706;
  --danger: #fef2f2;
  --danger-text: #dc2626;
  
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.05), 0 2px 4px -2px rgb(0 0 0 / 0.05);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.08), 0 4px 6px -4px rgb(0 0 0 / 0.04);
  --shadow-glow: 0 0 0 1px rgba(0,0,0,0.05), 0 4px 12px rgba(0,0,0,0.05);
  
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #09090b;
    --bg-accent: #18181b;
    --panel: #09090b;
    --panel-strong: #18181b;
    --border: #27272a;
    --border-strong: #3f3f46;
    --text: #fafafa;
    --text-secondary: #a1a1aa;
    --muted: #71717a;
    
    --brand: #ffffff;
    --brand-hover: #e4e4e7;
    --brand-soft: #27272a;
    
    --ok: #022c22;
    --ok-text: #34d399;
    --warn: #451a03;
    --warn-text: #fbbf24;
    --danger: #450a0a;
    --danger-text: #f87171;
    
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.5);
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.5), 0 2px 4px -2px rgb(0 0 0 / 0.5);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.6), 0 4px 6px -4px rgb(0 0 0 / 0.4);
    --shadow-glow: 0 0 0 1px rgba(255,255,255,0.05), 0 4px 12px rgba(0,0,0,0.8);
  }
}

* { box-sizing: border-box; }
.sr-only { position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }

body {
  margin: 0;
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-size: 14px;
}

a { color: var(--text); text-decoration: none; transition: color 0.15s ease; }
a:hover { color: var(--text-secondary); }

.shell { max-width: 1024px; margin: 0 auto; padding: 32px 24px; }

/* typography */
h1, h2, h3, h4, strong { color: var(--text); margin: 0; letter-spacing: -0.02em; }
h1 { font-size: 20px; font-weight: 700; }
h2 { font-size: 16px; font-weight: 600; margin-bottom: 16px; }
h3 { font-size: 14px; font-weight: 600; margin-bottom: 8px; }

.subtle { color: var(--text-secondary); font-size: 13px; line-height: 1.5; margin: 4px 0 0; }
.muted { color: var(--muted); font-size: 12px; }

/* layout */
.topbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 32px; padding-bottom: 16px; border-bottom: 1px solid var(--border); }
.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark { display: inline-flex; align-items: center; justify-content: center; width: 32px; height: 32px; border-radius: 8px; background: linear-gradient(135deg, #18181b, #3f3f46); box-shadow: var(--shadow-sm); overflow: hidden; }
@media (prefers-color-scheme: dark) { .brand-mark { background: linear-gradient(135deg, #3f3f46, #71717a); } }
.brand-mark img { width: 100%; height: 100%; display: block; }
.brand-text { font-size: 15px; font-weight: 700; letter-spacing: -0.01em; }

/* nav */
.nav { display: flex; gap: 4px; align-items: center; margin-bottom: 24px; }
.nav a { padding: 6px 12px; border-radius: var(--radius-md); font-size: 14px; font-weight: 500; color: var(--text-secondary); transition: all 0.2s ease; }
.nav a:hover { background: var(--bg-accent); color: var(--text); }
.nav a.active { background: var(--panel); color: var(--text); box-shadow: var(--shadow-sm); border: 1px solid var(--border); }

/* containers */
.panel, .provider-card, .table-wrap, .form-panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-glow);
  padding: 24px;
  margin-bottom: 24px;
}
.notice, .error { padding: 12px 16px; border-radius: var(--radius-md); font-size: 14px; margin-bottom: 24px; font-weight: 500; display: flex; align-items: center; gap: 8px; }
.notice { border: 1px solid rgba(5,150,105,0.2); background: var(--ok); color: var(--ok-text); }
.error { border: 1px solid rgba(220,38,38,0.2); background: var(--danger); color: var(--danger-text); }

/* grids */
.grid { display: grid; gap: 24px; }
.grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid.four { grid-template-columns: repeat(4, minmax(0, 1fr)); }

/* tables */
.table-wrap { overflow: hidden; padding: 0; }
.table { width: 100%; border-collapse: collapse; font-size: 13px; text-align: left; }
.table th, .table td { padding: 12px 16px; border-bottom: 1px solid var(--border); }
.table th { font-weight: 600; color: var(--text-secondary); background: var(--bg-accent); font-size: 12px; text-transform: uppercase; letter-spacing: 0.05em; }
.table tr:last-child td { border-bottom: none; }
.table td.actions { white-space: nowrap; text-align: right; }
.table td.actions form { display: inline-block; margin-left: 8px; }

/* forms & buttons */
label { display: flex; flex-direction: column; gap: 6px; font-size: 14px; font-weight: 500; }
input, select, textarea { width: 100%; border: 1px solid var(--border-strong); border-radius: var(--radius-md); padding: 10px 14px; background: var(--panel); color: var(--text); font-family: inherit; font-size: 14px; transition: all 0.2s ease; outline: none; box-shadow: var(--shadow-sm); }
input:focus, select:focus, textarea:focus { border-color: var(--brand); box-shadow: 0 0 0 2px var(--brand-soft); }
input[type="checkbox"], input[type="radio"] { width: auto; padding: 0; margin: 0 8px 0 0; cursor: pointer; display: inline-block; vertical-align: middle; height: auto; outline: none; box-shadow: none; border: none; flex-shrink: 0; }

.stack { display: grid; gap: 20px; max-width: 480px; }
.form-grid { display: grid; gap: 20px; }
.form-grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }

.button {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 8px 16px; border-radius: var(--radius-md);
  font-size: 13px; font-weight: 600;
  border: 1px solid var(--brand); cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1); text-decoration: none;
  background: var(--brand); color: var(--bg);
  box-shadow: var(--shadow-sm);
  letter-spacing: 0.01em;
}
@media (prefers-color-scheme: dark) { .button { color: var(--panel); } }
.button:hover { background: var(--brand-hover); border-color: var(--brand-hover); box-shadow: var(--shadow); transform: translateY(-1px); }
.button:active { transform: translateY(0); box-shadow: none; }
.button:disabled { opacity: 0.5; cursor: not-allowed; transform: none; box-shadow: none; }

.button.secondary { background: var(--panel); color: var(--text); border-color: var(--border-strong); box-shadow: var(--shadow-sm); }
.button.secondary:hover { background: var(--bg-accent); border-color: var(--border-strong); }

.button.ghost { background: transparent; color: var(--text-secondary); border-color: transparent; box-shadow: none; padding: 6px 12px; }
.button.ghost:hover { background: var(--bg-accent); color: var(--text); }

.button.danger { background: var(--danger); color: var(--danger-text); border-color: rgba(220,38,38,0.2); }
.button.danger:hover { background: #fee2e2; border-color: rgba(220,38,38,0.3); }
@media (prefers-color-scheme: dark) { .button.danger:hover { background: #7f1d1d; border-color: #991b1b; } }

.button.ghost-danger { background: transparent; color: var(--danger-text); border-color: transparent; box-shadow: none; padding: 6px 12px; }
.button.ghost-danger:hover { background: var(--danger); border-color: rgba(220,38,38,0.2); }
.button.small { padding: 6px 12px; font-size: 12px; }

/* pills and status */
.pill { display: inline-flex; align-items: center; justify-content: center; padding: 4px 8px; border-radius: var(--radius-sm); font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; background: var(--bg-accent); color: var(--text-secondary); border: 1px solid var(--border); white-space: nowrap; }
.pill.active, .status-ok { background: var(--ok); color: var(--ok-text); border-color: rgba(5,150,105,0.2); }
.status-error { background: var(--danger); color: var(--danger-text); border-color: rgba(220,38,38,0.2); }
.status-neutral { background: var(--warn); color: var(--warn-text); border-color: rgba(217,119,6,0.2); }

/* tooltips - CSS floating labels */
.tooltip-wrap {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.tooltip-icon {
  display: inline-flex; justify-content: center; align-items: center;
  width: 16px; height: 16px; border-radius: 50%;
  background: var(--bg-accent); color: var(--muted);
  font-size: 11px; font-weight: bold; cursor: help; border: 1px solid var(--border);
  transition: all 0.2s ease;
}
.tooltip-icon:hover { color: var(--text); background: var(--border-strong); border-color: var(--muted); }
.tooltip-content {
  position: absolute; bottom: 100%; left: 50%; transform: translateX(-50%) translateY(4px);
  background: var(--panel); border: 1px solid var(--border);
  color: var(--text); font-size: 12px; font-weight: 400; line-height: 1.5;
  padding: 12px 14px; border-radius: var(--radius-md); box-shadow: var(--shadow-lg);
  white-space: normal; min-width: 240px; z-index: 100;
  opacity: 0; pointer-events: none; transition: opacity 0.2s, transform 0.2s;
  text-align: left; text-transform: none; letter-spacing: normal;
}
.tooltip-wrap:hover .tooltip-content { opacity: 1; transform: translateX(-50%) translateY(-8px); }

/* Tooltip directions */
.tooltip-wrap.bottom .tooltip-content { bottom: auto; top: 100%; left: 50%; transform: translateX(-50%) translateY(-4px); }
.tooltip-wrap.bottom:hover .tooltip-content { transform: translateX(-50%) translateY(8px); }

.tooltip-wrap.right .tooltip-content { bottom: 50%; left: 100%; top: auto; right: auto; transform: translateY(50%) translateX(-4px); }
.tooltip-wrap.right:hover .tooltip-content { transform: translateY(50%) translateX(8px); }

.tooltip-wrap.left .tooltip-content { bottom: 50%; right: 100%; left: auto; top: auto; transform: translateY(50%) translateX(4px); }
.tooltip-wrap.left:hover .tooltip-content { transform: translateY(50%) translateX(-8px); }

.tooltip-wrap.bottom-left .tooltip-content { bottom: auto; top: 100%; left: 0; transform: translateY(-4px); }
.tooltip-wrap.bottom-left:hover .tooltip-content { transform: translateY(8px); }

.tooltip-wrap.bottom-right .tooltip-content { bottom: auto; top: 100%; left: auto; right: 0; transform: translateY(-4px); }
.tooltip-wrap.bottom-right:hover .tooltip-content { transform: translateY(8px); }

/* specific components */
.pre, code { font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace; font-size: 0.9em; word-break: break-all; }
dd code, td code, .details code, .token-box code { display: inline-block; padding: 2px 6px; border-radius: 4px; background: var(--bg-accent); border: 1px solid var(--border); color: var(--text); }
.pre { line-height: 1.6; white-space: pre-wrap; margin: 0; }

/* Dashboard layout specific */
.meta-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin-top: 20px; }
.meta-grid div { display: flex; flex-direction: column; gap: 4px; }
.meta-grid dt { color: var(--text-secondary); font-size: 12px; text-transform: uppercase; font-weight: 600; letter-spacing: 0.05em;}
.meta-grid dd { margin: 0; font-family: ui-monospace, Consolas, monospace; color: var(--text); font-size: 13px; word-break: break-all; }

.provider-section { margin-bottom: 32px; }
.section-head { display: flex; justify-content: space-between; align-items: flex-end; margin-bottom: 20px; border-bottom: 1px solid var(--border); padding-bottom: 16px; }
.section-head h2 { margin: 0; padding: 0; }
.provider-empty { text-align: center; padding: 48px 24px; color: var(--text-secondary); border: 1px dashed var(--border-strong); border-radius: var(--radius-lg); background: var(--panel); }
.provider-list { display: flex; flex-direction: column; gap: 12px; }
.provider-row { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 16px 20px; background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius-lg); transition: all 0.2s ease; box-shadow: var(--shadow-sm); }
.provider-row:hover { border-color: var(--border-strong); box-shadow: var(--shadow); }
.provider-row-active { border-color: var(--ok-text); box-shadow: 0 0 0 1px rgba(5,150,105,0.1), var(--shadow-sm); }
@media (prefers-color-scheme: dark) { .provider-row-active { background: rgba(5,150,105,0.05); } }

.row-main { display: flex; flex-direction: column; gap: 8px; flex: 1; min-width: 0; }
.row-header { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.row-title { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.row-title strong { font-size: 15px; font-weight: 600; }
.row-url { color: var(--text-secondary); font-size: 12px; }
.row-meta { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; font-size: 12px; color: var(--text-secondary); }
.meta-pill { background: var(--bg-accent); border: 1px solid var(--border); padding: 4px 8px; border-radius: var(--radius-sm); font-weight: 500; }
.row-actions { display: flex; align-items: center; gap: 8px; flex-shrink: 0; flex-wrap: wrap; justify-content: flex-end; }
.row-actions form { margin: 0; }

.checkbox-grid { display: grid; gap: 16px; grid-template-columns: repeat(2, minmax(0, 1fr)); }
.checkbox-card { flex-direction: row; align-items: center; gap: 12px; padding: 12px 16px; border-radius: var(--radius-md); border: 1px solid var(--border); background: var(--panel); font-weight: 500; cursor: pointer; transition: all 0.2s ease; box-shadow: var(--shadow-sm); }
.checkbox-card:hover { border-color: var(--border-strong); }
.checkbox-card input { margin: 0; }

.modal-shell { position: fixed; inset: 0; z-index: 60; display: flex; align-items: center; justify-content: center; padding: 24px; }
.modal-scrim { position: absolute; inset: 0; background: rgba(0, 0, 0, 0.4); backdrop-filter: blur(4px); }
.modal-card { position: relative; width: min(840px, 100%); max-height: calc(100vh - 48px); overflow: auto; background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius-xl); box-shadow: var(--shadow-lg); padding: 32px; }
.modal-head { display: flex; justify-content: space-between; gap: 16px; align-items: flex-start; margin-bottom: 24px; border-bottom: 1px solid var(--border); padding-bottom: 20px; }

.probe-grid { display: grid; gap: 16px; grid-template-columns: repeat(2, minmax(0, 1fr)); margin-bottom: 20px; }
.probe-result-card { border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 16px; background: var(--bg-accent); box-shadow: inset 0 1px 2px rgba(0,0,0,0.02); }
.probe-result-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; }
.probe-result-body { padding: 12px; border-radius: var(--radius-md); border: 1px solid var(--border); background: var(--panel); font-size: 13px; white-space: pre-wrap; word-break: break-word; }
.probe-result-body.status-ok { background: var(--ok); color: var(--ok-text); border-color: rgba(5,150,105,0.2); }
.probe-result-body.status-error { background: var(--danger); color: var(--danger-text); border-color: rgba(220,38,38,0.2); }

.model-list-panel { border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 16px; background: var(--panel); box-shadow: var(--shadow-sm); }
.selected-model-card { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 12px 16px; margin-bottom: 16px; border-radius: var(--radius-md); border: 1px solid var(--brand); background: var(--panel); box-shadow: 0 0 0 1px var(--brand-soft); }
.model-list { display: grid; gap: 8px; max-height: 280px; overflow: auto; padding-right: 4px; }
.model-row { display: flex; gap: 12px; align-items: center; justify-content: space-between; padding: 8px 12px; border-radius: var(--radius-md); border: 1px solid var(--border); background: var(--panel); transition: all 0.15s ease; }
.model-row:hover { border-color: var(--border-strong); }
.model-row-selected { border-color: var(--warn-text); background: var(--warn); box-shadow: 0 0 0 1px rgba(217,119,6,0.1); }
.model-row-selected .model-name { font-weight: 600; color: var(--warn-text); }
.model-name { border: none; background: transparent; color: var(--text); font: inherit; padding: 0; cursor: pointer; text-align: left; word-break: break-all; transition: color 0.15s ease; }
.model-name:hover { color: var(--text-secondary); }
.model-actions { display: flex; gap: 6px; }

/* Toast */
#toast-container { position: fixed; top: 24px; right: 24px; z-index: 9999; display: flex; flex-direction: column; gap: 12px; pointer-events: none; }
.toast { background: var(--panel); border: 1px solid var(--border); box-shadow: var(--shadow-lg); border-radius: var(--radius-md); padding: 16px 20px; font-size: 14px; font-weight: 500; display: flex; align-items: flex-start; gap: 12px; max-width: 360px; pointer-events: auto; animation: slideInRight 0.4s cubic-bezier(0.16, 1, 0.3, 1), fadeOut 0.4s cubic-bezier(0.16, 1, 0.3, 1) forwards 4s; word-break: break-word; }
.toast.toast-error { border-left: 4px solid var(--danger-text); }
.toast.toast-success { border-left: 4px solid var(--ok-text); }
@keyframes slideInRight { from { transform: translateX(120%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }
@keyframes fadeOut { to { opacity: 0; transform: translateY(-10px); pointer-events: none; } }

.button.is-loading { pointer-events: none; opacity: 0.8; position: relative; color: transparent !important; }
.button.is-loading::after { content: ""; position: absolute; width: 16px; height: 16px; border: 2px solid rgba(255,255,255,0.3); border-top-color: #fff; border-radius: 50%; animation: spin 0.6s linear infinite; left: calc(50% - 8px); top: calc(50% - 8px); }
.button.ghost.is-loading::after, .button.secondary.is-loading::after { border: 2px solid rgba(0,0,0,0.1); border-top-color: var(--text); }
@keyframes spin { to { transform: rotate(360deg); } }

/* Login Page specific tweaks */
body:has(.login-wrap) { display: flex; min-height: 100vh; align-items: center; justify-content: center; background: var(--bg-accent); }
.login-wrap { width: 100%; display: flex; justify-content: center; padding: 24px; }
.login-card { background: var(--panel); padding: 48px 40px; border-radius: var(--radius-xl); border: 1px solid var(--border); box-shadow: var(--shadow-lg); width: 100%; max-width: 440px; }
.login-brand { display: flex; flex-direction: column; align-items: center; gap: 16px; margin-bottom: 32px; text-align: center; }
.login-logo { width: 48px; height: 48px; border-radius: 12px; box-shadow: var(--shadow-sm); }
.login-title { font-size: 24px; font-weight: 700; letter-spacing: -0.02em; }
.login-subtitle { font-size: 14px; color: var(--text-secondary); margin-top: 4px; }
.login-form { width: 100%; display: flex; flex-direction: column; gap: 20px; }
.login-field { display: flex; flex-direction: column; gap: 8px; }
.login-label { font-size: 14px; font-weight: 600; color: var(--text); }
.login-input { padding: 12px 16px; font-size: 15px; border-radius: var(--radius-md); }
.login-btn { width: 100%; padding: 12px; margin-top: 8px; font-size: 14px; font-weight: 600; }
.login-hint { margin-top: 32px; padding-top: 24px; border-top: 1px solid var(--border); font-size: 13px; color: var(--muted); text-align: center; line-height: 1.6; word-break: break-all; }

@media (max-width: 768px) {
  .grid.two, .grid.three, .grid.four, .form-grid.two, .checkbox-grid, .probe-grid { grid-template-columns: 1fr; }
  .topbar { flex-direction: column; align-items: stretch; gap: 20px; margin-bottom: 24px; }
  .shell { padding: 20px 16px; }
  .table-wrap { display: block; overflow-x: auto; white-space: nowrap; }
  .login-card { padding: 32px 24px; }
}