/* === RESET === */
* { box-sizing: border-box; margin: 0; padding: 0; }

/* === CUSTOM PROPERTIES === */
:root {
  --bg: #f0f2f5;
  --card: #ffffff;
  --nav: #0c1222;
  --nav-text: #94a3b8;
  --nav-text-hover: #ffffff;
  --border: #e0e4ea;
  --border-focus: #2563eb;
  --text: #1a2233;
  --text-secondary: #5f6d7e;
  --text-tertiary: #94a3b8;
  --accent: #2563eb;
  --accent-hover: #1d4fd8;
  --accent-subtle: #eff4ff;
  --green: #16a34a;
  --green-bg: #f0fdf4;
  --green-border: #bbf7d0;
  --amber: #d97706;
  --amber-bg: #fffbeb;
  --amber-border: #fde68a;
  --red: #dc2626;
  --red-bg: #fef2f2;
  --red-border: #fecaca;
  --blue: #2563eb;
  --blue-bg: #eff6ff;
  --blue-border: #bfdbfe;
  --grey: #6b7280;
  --grey-bg: #f3f4f6;
  --grey-border: #e5e7eb;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 4px 12px rgba(0, 0, 0, 0.06), 0 1px 3px rgba(0, 0, 0, 0.04);
  --radius: 8px;
  --radius-sm: 6px;
  --font: "Outfit", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", "SF Mono", "Consolas", monospace;
}

/* === GLOBAL === */
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  font-size: 0.95rem;
  -webkit-font-smoothing: antialiased;
}

h2 {
  font-weight: 600;
  font-size: 1.35rem;
  color: var(--text);
  margin-bottom: 1.5rem;
  letter-spacing: -0.01em;
}

h3 {
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-tertiary);
  margin: 2rem 0 0.75rem;
}

/* === TOPBAR === */
.topbar {
  display: flex;
  align-items: center;
  gap: 2rem;
  padding: 0 1.5rem;
  height: 60px;
  background: var(--nav);
}

.brand {
  font-weight: 700;
  font-size: 1.05rem;
  color: #ffffff;
  text-decoration: none;
  letter-spacing: -0.01em;
}

.nav-links { display: flex; gap: 0.25rem; }
.nav-links a {
  color: var(--nav-text);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.375rem 0.75rem;
  border-radius: var(--radius-sm);
  transition: color 0.15s, background 0.15s;
}
.nav-links a:hover {
  color: var(--nav-text-hover);
  background: rgba(255, 255, 255, 0.08);
}

.sse-status {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 0.375rem;
}
.sse-label {
  font-size: 0.7rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--nav-text);
}

/* === LED === */
.led {
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: currentColor;
  flex-shrink: 0;
}
.led-green { color: var(--green); }
.led-amber { color: var(--amber); animation: pulse 2s ease-in-out infinite; }
.led-red { color: var(--red); animation: pulse 1.5s ease-in-out infinite; }
.led-blue { color: var(--blue); animation: pulse 2.5s ease-in-out infinite; }
.led-grey { color: var(--grey); }

.led-lg { width: 9px; height: 9px; }

/* Navbar LED uses lighter colors */
.topbar .led-green { color: #4ade80; }
.topbar .led-red { color: #f87171; }
.topbar .led-grey { color: var(--nav-text); }

/* === LAYOUT === */
main {
  padding: 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

/* === BUTTONS === */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.5rem 1.1rem;
  background: var(--accent);
  color: #ffffff;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  text-decoration: none;
  font-size: 0.875rem;
  font-family: var(--font);
  font-weight: 500;
  transition: background 0.15s, box-shadow 0.15s;
  box-shadow: var(--shadow-sm);
}
.btn:hover {
  background: var(--accent-hover);
  box-shadow: var(--shadow-md);
}
.btn-danger {
  background: var(--red);
}
.btn-danger:hover {
  background: #b91c1c;
}
.btn-sm {
  font-size: 0.75rem;
  padding: 0.3rem 0.6rem;
}

/* === ACTIONS === */
.actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}
.count {
  color: var(--text-tertiary);
  font-size: 0.8rem;
  font-weight: 500;
}

/* === HOST GRID === */
.host-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1rem;
}

.tile {
  display: block;
  padding: 1.25rem 1.5rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--text);
  transition: border-color 0.15s, box-shadow 0.2s;
  box-shadow: var(--shadow-sm);
}
.tile:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-lg);
}

.tile-header {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  margin-bottom: 0.5rem;
}
.tile-name {
  font-weight: 600;
  font-size: 1rem;
  color: var(--text);
  font-family: var(--font-mono);
}

.tile-meta { margin-bottom: 0.75rem; }
.tile-type {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.tile-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border);
}
.tile-mac {
  font-size: 0.8rem;
  font-family: var(--font-mono);
  color: var(--text-tertiary);
}

/* === STATUS BADGES === */
.tile-state-label, .badge {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
}

.state-grey .tile-state-label, .badge.state-grey { background: var(--grey-bg); color: var(--grey); border: 1px solid var(--grey-border); }
.state-blue .tile-state-label, .badge.state-blue { background: var(--blue-bg); color: var(--blue); border: 1px solid var(--blue-border); }
.state-amber .tile-state-label, .badge.state-amber { background: var(--amber-bg); color: var(--amber); border: 1px solid var(--amber-border); }
.state-green .tile-state-label, .badge.state-green { background: var(--green-bg); color: var(--green); border: 1px solid var(--green-border); }
.state-red .tile-state-label, .badge.state-red { background: var(--red-bg); color: var(--red); border: 1px solid var(--red-border); }

/* === PANELS === */
.panel {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  margin-bottom: 1rem;
}

/* === HOST DETAIL === */
.host-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}
.host-header h2 { margin-bottom: 0; }

/* === TABLES === */
.detail-table { margin-bottom: 1.5rem; }
.detail-table th {
  text-align: left;
  padding: 0.5rem 1.5rem 0.5rem 0;
  color: var(--text-tertiary);
  font-weight: 500;
  font-size: 0.825rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.detail-table td {
  padding: 0.5rem 0;
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.9rem;
}

.ops-table { width: 100%; border-collapse: collapse; font-size: 0.875rem; }
.ops-table th {
  text-align: left;
  padding: 0.625rem 0.75rem;
  border-bottom: 2px solid var(--border);
  color: var(--text-tertiary);
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.ops-table td {
  padding: 0.625rem 0.75rem;
  border-bottom: 1px solid var(--border);
  color: var(--text);
}
.ops-table tr:hover td { background: var(--accent-subtle); }

/* === FORMS === */
.form { max-width: 420px; }
.form label {
  display: block;
  margin-bottom: 1.25rem;
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 500;
}
.form input, .form select, .form textarea {
  display: block;
  width: 100%;
  padding: 0.55rem 0.75rem;
  margin-top: 0.375rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.form input:focus, .form select:focus, .form textarea:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}
.form select { font-family: var(--font); }
.form textarea { min-height: 80px; resize: vertical; }
.form .btn { margin-top: 0.5rem; }

/* === ERROR === */
.error {
  background: var(--red-bg);
  color: var(--red);
  padding: 0.75rem 1rem;
  border: 1px solid var(--red-border);
  border-radius: var(--radius-sm);
  margin-bottom: 1rem;
  font-size: 0.825rem;
  font-weight: 500;
}

/* === EMPTY STATE === */
.empty {
  color: var(--text-tertiary);
  padding: 3rem;
  text-align: center;
}
.empty a { color: var(--accent); text-decoration: none; font-weight: 500; }
.empty a:hover { text-decoration: underline; }

/* === UPLOAD PROGRESS === */
.upload-progress { max-width: 420px; }
.progress-bar-track {
  width: 100%;
  height: 6px;
  background: var(--bg);
  border-radius: 3px;
  margin: 0.75rem 0;
  overflow: hidden;
}
.progress-bar-fill {
  height: 100%;
  width: 0%;
  background: var(--accent);
  border-radius: 3px;
  transition: width 0.3s ease;
}
.progress-bar-fill.complete { background: var(--green); }
.progress-text { font-size: 0.825rem; color: var(--text); font-weight: 500; }
.progress-detail { font-size: 0.775rem; color: var(--text-secondary); }

/* === UTILITY === */
.inline { display: inline; }

/* === ANIMATIONS === */
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* === RESPONSIVE === */
@media (max-width: 720px) {
  .host-grid { grid-template-columns: 1fr; }
  main { padding: 1.25rem; }
  .topbar { padding: 0 1rem; gap: 1rem; }
}