/* StreamNOC Application Styles */

:root {
  --color-bg: #f8f9fa;
  --color-surface: #ffffff;
  --color-text: #212529;
  --color-text-muted: #6c757d;
  --color-primary: #0d6efd;
  --color-primary-hover: #0b5ed7;
  --color-success: #198754;
  --color-danger: #dc3545;
  --color-warning: #ffc107;
  --color-border: #dee2e6;
  --color-nav-bg: #1a1a2e;
  --color-nav-text: #e0e0e0;
  --radius: 6px;
  --shadow: 0 1px 3px rgba(0,0,0,0.1);
}

*, *::before, *::after { box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
}

/* Navigation */
.main-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 0.5rem 1.5rem;
  background: var(--color-nav-bg);
  color: var(--color-nav-text);
  font-size: 0.875rem;
}

.main-nav a { color: var(--color-nav-text); text-decoration: none; }
.main-nav a:hover { color: #fff; }

.nav-brand a { font-weight: 700; font-size: 1.1rem; color: #fff !important; }
.nav-links { display: flex; gap: 1rem; flex: 1; }

.nav-user {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.nav-user button {
  background: transparent;
  border: 1px solid var(--color-text-muted);
  color: var(--color-nav-text);
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.75rem;
}

/* Container */
.container { max-width: 1400px; margin: 0 auto; padding: 1.5rem; }

/* Flash messages */
.flash {
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  margin-bottom: 1rem;
  font-size: 0.875rem;
}
.flash-notice { background: #d1e7dd; color: #0f5132; }
.flash-alert { background: #f8d7da; color: #842029; }

/* Cards */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.25rem;
  margin-bottom: 1rem;
}
.card h2 { margin-top: 0; font-size: 1.1rem; }

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}
th, td {
  text-align: left;
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid var(--color-border);
}
th { font-weight: 600; color: var(--color-text-muted); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.05em; }
tbody tr:hover { background: #f8f9fa; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.375rem 0.75rem;
  font-size: 0.875rem;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  font-weight: 500;
  line-height: 1.5;
}
.btn-primary { background: var(--color-primary); color: #fff; }
.btn-primary:hover { background: var(--color-primary-hover); }
.btn-success { background: var(--color-success); color: #fff; }
.btn-danger { background: var(--color-danger); color: #fff; }
.btn-outline {
  background: transparent;
  border-color: var(--color-border);
  color: var(--color-text);
}
.btn-outline:hover { background: var(--color-bg); }
.btn-sm { padding: 0.2rem 0.5rem; font-size: 0.8rem; }

/* Forms */
.form-group { margin-bottom: 1rem; }
.form-group label { display: block; font-weight: 500; margin-bottom: 0.25rem; font-size: 0.875rem; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%;
  padding: 0.375rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 0.875rem;
  line-height: 1.5;
}
.form-group input:focus, .form-group select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(13, 110, 253, 0.15);
}
.form-group .hint { font-size: 0.75rem; color: var(--color-text-muted); margin-top: 0.25rem; }
.form-check { display: flex; align-items: center; gap: 0.5rem; }
.form-check input[type="checkbox"] { width: auto; }

.form-errors {
  background: #f8d7da;
  color: #842029;
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  margin-bottom: 1rem;
  font-size: 0.875rem;
}
.form-errors ul { margin: 0.25rem 0 0; padding-left: 1.25rem; }

/* Grid utilities */
.grid { display: grid; gap: 1rem; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* Flex utilities */
.flex { display: flex; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.gap-sm { gap: 0.5rem; }
.gap-md { gap: 1rem; }

/* Badge */
.badge {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.badge-online { background: #d1e7dd; color: #0f5132; }
.badge-offline { background: #e2e3e5; color: #41464b; }
.badge-unseen { background: #fff3cd; color: #664d03; }

/* Status indicator */
.status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin-right: 0.35rem;
}
.status-dot-online { background: var(--color-success); }
.status-dot-offline { background: var(--color-text-muted); }
.status-dot-error { background: var(--color-danger); }

/* Metric cards */
.metric {
  text-align: center;
  padding: 1rem;
}
.metric-value { font-size: 1.75rem; font-weight: 700; line-height: 1.2; }
.metric-label { font-size: 0.75rem; color: var(--color-text-muted); text-transform: uppercase; letter-spacing: 0.05em; }

/* Page header */
.page-header { margin-bottom: 1.5rem; }
.page-header h1 { margin: 0 0 0.25rem; font-size: 1.5rem; }
.page-header p { margin: 0; color: var(--color-text-muted); font-size: 0.875rem; }

/* Multi-viewer grid */
.multi-viewer-grid {
  display: grid;
  gap: 4px;
  background: #000;
  border-radius: var(--radius);
  overflow: hidden;
}

.tile {
  position: relative;
  background: #111;
  overflow: hidden;
}

.tile-header {
  padding: 0.25rem 0.5rem;
  background: rgba(0,0,0,0.8);
  color: #fff;
  font-size: 0.75rem;
  z-index: 2;
  position: relative;
}
.tile-label { font-weight: 500; }

.tile-body {
  position: relative;
  aspect-ratio: 16/9;
}
.tile-body video {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #000;
}

.tile-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(17,17,17,0.85);
  z-index: 1;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
}
.tile-overlay.visible {
  opacity: 1;
}
.tile-overlay-text {
  color: var(--color-text-muted);
  font-size: 0.8rem;
}

.tile-focused { outline: 3px solid var(--color-success); outline-offset: -3px; }
.tile-selected { outline: 2px solid var(--color-primary); outline-offset: -2px; }

/* Audio meter canvas */
.audio-meter-canvas {
  border-radius: 2px;
  background: #333;
}

/* Sparkline */
.sparkline { display: block; width: 100%; }

/* Dark mode for multi-viewer and shared views */
body.dark-mode {
  --color-bg: #0a0a0a;
  --color-surface: #1a1a1a;
  --color-text: #e0e0e0;
  --color-text-muted: #888;
  --color-border: #333;
}
body.dark-mode .form-group input,
body.dark-mode .form-group select,
body.dark-mode .form-group textarea {
  background: #222;
  color: var(--color-text);
  border-color: var(--color-border);
}
body.dark-mode .form-errors {
  background: #3d1c1c;
  color: #f8d7da;
}
body.dark-mode .flash-notice {
  background: #1c3d2a;
  color: #d1e7dd;
}
body.dark-mode .flash-alert {
  background: #3d1c1c;
  color: #f8d7da;
}
body.dark-mode .empty-state {
  color: var(--color-text-muted);
}

/* Login page */
.login-container {
  max-width: 420px;
  margin: 4rem auto;
  padding: 0 1rem;
}
.login-container .card {
  padding: 2rem;
}
.login-container h1 {
  font-size: 1.75rem;
  margin: 0;
}

/* Empty states */
.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--color-text-muted);
}
.empty-state p { margin: 0.5rem 0; }

/* Utility: truncate */
.truncate {
  max-width: 200px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Links */
a { color: var(--color-primary); }
a:hover { color: var(--color-primary-hover); }

/* Color field */
.form-group input[type="color"] {
  height: 38px;
  padding: 4px;
  cursor: pointer;
}

/* Responsive */
@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .main-nav { flex-wrap: wrap; }
  .nav-links { order: 3; width: 100%; }
}