/**
 * ND Sentinel Theme: Nightz Development Dashboard
 * Slate base + ND signature blue, glassmorphism, depth gradients
 */

:root {
  /* ND Signature Palette */
  --nd-blue: #3b82f6;
  --nd-blue-bright: #60a5fa;
  --nd-blue-dim: #1d4ed8;
  --nd-blue-glow: rgba(59, 130, 246, 0.35);
  --nd-blue-soft: rgba(59, 130, 246, 0.12);

  /* Slate Foundation (dark first) */
  --slate-950: #020617;
  --slate-900: #0a1024;
  --slate-850: #0f172a;
  --slate-800: #131c33;
  --slate-700: #1e293b;
  --slate-600: #334155;
  --slate-500: #475569;
  --slate-400: #64748b;
  --slate-300: #94a3b8;
  --slate-200: #cbd5e1;
  --slate-100: #e2e8f0;

  /* Semantic tokens: dark cyber terminal (deep #0f1015 base) */
  --bg-primary: #0f1015;
  --bg-secondary: rgba(20, 22, 30, 0.72);
  --bg-tertiary: rgba(30, 33, 44, 0.55);
  --bg-card: rgba(20, 22, 30, 0.6);
  --bg-elevated: rgba(26, 29, 40, 0.78);
  --bg-input: rgba(10, 11, 16, 0.7);

  --text-primary: #e6e9ef;
  --text-secondary: #9aa3b2;
  --text-tertiary: #6b7280;
  --text-muted: #4b5563;

  /* Hairline borders: white/5 with a slightly stronger variant. */
  --border-color: rgba(255, 255, 255, 0.05);
  --border-strong: rgba(255, 255, 255, 0.1);
  --border-focus: var(--nd-blue);

  --accent-primary: var(--nd-blue);
  --accent-secondary: var(--nd-blue-bright);

  /* Status: neon green for active/online indicators */
  --success: #00ff00;
  --success-bg: rgba(0, 255, 0, 0.08);
  --warning: #f59e0b;
  --warning-bg: rgba(245, 158, 11, 0.1);
  --error: #ef4444;
  --error-bg: rgba(239, 68, 68, 0.1);
  --info: var(--nd-blue);
  --info-bg: var(--nd-blue-soft);

  /* Map old design system names so styles.css cards still render correctly */
  --bg: #0f1015;
  --bg-surface: #15161d;
  --bg-hover: rgba(255, 255, 255, 0.04);
  --border: rgba(255, 255, 255, 0.05);
  --text: #e2e8f0;
  --accent: var(--nd-blue);
  --accent-hover: var(--nd-blue-bright);
  --accent-muted: var(--nd-blue-dim);
  --accent-soft: var(--nd-blue-soft);
  --accent-20: rgba(96, 165, 250, 0.2);
  --warn: var(--warning);
  --warn-bg: var(--warning-bg);
  --danger: var(--error);
  --danger-bg: var(--error-bg);

  /* Shape & motion */
  --radius: 10px;
  --radius-sm: 7px;
  --radius-lg: 16px;
  --radius-pill: 999px;

  --shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 24px 48px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 24px var(--nd-blue-glow);

  /* Typography */
  --font: "Inter", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;

  color-scheme: dark;
}

/* Light mode override (rarely used; Sentinel is dark first) */
[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: rgba(255, 255, 255, 0.85);
  --bg-tertiary: rgba(241, 245, 249, 0.75);
  --bg-card: rgba(255, 255, 255, 0.95);
  --bg-elevated: rgba(255, 255, 255, 0.98);
  --bg-input: #ffffff;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-tertiary: #64748b;
  --text-muted: #94a3b8;
  --border-color: rgba(15, 23, 42, 0.08);
  --border-strong: rgba(15, 23, 42, 0.16);
  --bg: #f8fafc;
  --text: #0f172a;
  color-scheme: light;
}

/* Reset & base */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  font-size: 14px;
  scroll-behavior: smooth;
}
body {
  font-family: var(--font);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  /* Deep low-contrast terminal: flat #0f1015 with a faint electric-blue haze. */
  background-image:
    radial-gradient(ellipse 70% 45% at 85% -10%, rgba(59, 130, 246, 0.06), transparent 60%),
    radial-gradient(ellipse 60% 50% at 0% 110%, rgba(0, 255, 0, 0.02), transparent 60%),
    linear-gradient(180deg, #0f1015, #0c0d12);
  background-attachment: fixed;
  transition: background-color 0.3s ease;
}

a {
  color: var(--accent-primary);
  text-decoration: none;
}
a:hover {
  color: var(--accent-secondary);
}
h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.01em;
}

/* Sentinel-grade button */
.btn {
  padding: 0.5rem 1rem;
  background: linear-gradient(135deg, var(--nd-blue) 0%, var(--nd-blue-dim) 100%);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font: inherit;
  font-size: 0.875rem;
  font-weight: 500;
  transition: all 0.15s ease;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}
.btn:hover {
  box-shadow:
    0 4px 16px var(--nd-blue-glow),
    0 1px 2px rgba(0, 0, 0, 0.4);
  transform: translateY(-1px);
}
.btn:active {
  transform: translateY(0);
}
.btn-sm {
  padding: 0.25rem 0.625rem;
  font-size: 0.75rem;
}
.btn-secondary {
  background: rgba(148, 163, 184, 0.08);
  color: var(--text-primary);
  border-color: var(--border-strong);
}
.btn-secondary:hover {
  background: rgba(148, 163, 184, 0.14);
}
.btn-danger {
  background: linear-gradient(135deg, #ef4444 0%, #b91c1c 100%);
}
.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none !important;
}

/* Badges */
.badge {
  display: inline-block;
  padding: 0.125rem 0.5rem;
  background: var(--nd-blue-soft);
  color: var(--nd-blue-bright);
  border: 1px solid rgba(96, 165, 250, 0.25);
  border-radius: 4px;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.badge-success {
  background: var(--success-bg);
  color: var(--success);
  border-color: rgba(16, 185, 129, 0.25);
}
.badge-warning {
  background: var(--warning-bg);
  color: var(--warning);
  border-color: rgba(245, 158, 11, 0.25);
}
.badge-danger {
  background: var(--error-bg);
  color: var(--error);
  border-color: rgba(239, 68, 68, 0.25);
}

/* Toast notifications: Sentinel alert style */
.toast {
  position: fixed;
  bottom: -100px;
  left: 1rem;
  right: auto;
  max-width: 380px;
  padding: 0.875rem 1rem;
  background: rgba(15, 23, 42, 0.92);
  border: 1px solid var(--border-strong);
  border-left: 3px solid var(--nd-blue);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  font-size: 0.85rem;
  transition: bottom 0.3s ease;
  z-index: 1000;
  color: var(--text-primary);
}
.toast--show {
  bottom: 1rem;
}
.toast--error {
  border-left-color: var(--error);
}
.toast--success {
  border-left-color: var(--success);
}
.toast--info {
  border-left-color: var(--nd-blue);
}
.toast--warning {
  border-left-color: var(--warning);
}

/* Modal */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(2, 6, 23, 0.7);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 999;
}
.modal-content {
  background: var(--bg-elevated);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  max-width: 540px;
  width: 90%;
  max-height: 80vh;
  overflow-y: auto;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}
.modal-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.modal-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-secondary);
}
.modal-close:hover {
  color: var(--text-primary);
}
.modal-body {
  padding: 1.5rem;
}
.modal-footer {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  gap: 0.5rem;
  justify-content: flex-end;
}

.empty-state {
  text-align: center;
  padding: 3rem 2rem;
  color: var(--text-secondary);
}

/* Sentinel tooltip system */
[data-tip] {
  position: relative;
}
[data-tip]:hover::after {
  content: attr(data-tip);
  position: absolute;
  bottom: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%);
  background: rgba(2, 6, 23, 0.96);
  color: var(--text-primary);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.75rem;
  font-size: 0.75rem;
  white-space: nowrap;
  max-width: 320px;
  box-shadow: var(--shadow-md);
  z-index: 100;
  pointer-events: none;
}