/* ============================================================
   UTF.v3 — High-Contrast Neon Yellow & Cyan Design System
   Clean, Minimal, High-Precision Operator Interface
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500;700&display=swap');

:root {
  /* Surface & Background Base */
  --bg-main: #060609;          /* Deep Obsidian Base */
  --bg-surface: #0d0d14;       /* Card & Container Background */
  --bg-surface-elevated: #141420; /* Elevated Headers & Modals */
  --border-subtle: #1e1e2d;     /* Subtle Grid Divider */
  --border-strong: #32324c;     /* Active Card & Input Borders */

  /* Primary Neon Yellow & Cyan Accents */
  --neon-yellow: #ffe600;      /* Primary Neon Yellow */
  --yellow-hover: #fff066;
  --yellow-glow: rgba(255, 230, 0, 0.15);
  
  --neon-cyan: #00f0ff;        /* Neon Cyan/Blue Highlight */
  --cyan-hover: #66f5ff;
  --cyan-glow: rgba(0, 240, 255, 0.15);
  
  /* Text & Typography */
  --text-primary: #f2f2f8;     /* Off-White Crisp Text */
  --text-muted: #9595b2;       /* Muted Steel Grey */
  --text-dim: #5c5c78;         /* Low-contrast Metadata */

  /* Functional Status Colors */
  --status-success: #10b981;
  --status-warn: #ffe600;
  --status-error: #ef4444;

  /* Layout Tokens */
  --font-sans: 'Inter', -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --nav-h: 56px;
  --max-w: 1100px;
  --transition: 0.18s ease;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  color-scheme: dark;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-main);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
  padding-top: var(--nav-h);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 6px;
}
::-webkit-scrollbar-track {
  background: var(--bg-main);
}
::-webkit-scrollbar-thumb {
  background: var(--border-strong);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--neon-yellow);
}

/* Typography Helpers */
h1, h2, h3, h4 {
  color: #ffffff;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.mono {
  font-family: var(--font-mono);
}

/* ── NAVBAR ──────────────────────────────────────────────── */
.nav-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-h);
  background: var(--bg-main);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.5rem;
  z-index: 1000;
}

.nav-brand {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 800;
  color: #ffffff;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-brand span {
  color: var(--neon-yellow);
}

.nav-links {
  display: flex;
  gap: 0.5rem;
}

.nav-link {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  text-decoration: none;
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}

.nav-link:hover, .nav-link.active {
  color: var(--neon-yellow);
  background: var(--bg-surface-elevated);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* ── BUTTONS ─────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  padding: 0.5rem 1.25rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--transition);
  text-decoration: none;
}

.btn-primary {
  background: var(--neon-yellow);
  color: #000000;
}

.btn-primary:hover {
  background: var(--yellow-hover);
  box-shadow: 0 0 15px var(--yellow-glow);
}

.btn-cyan {
  background: var(--neon-cyan);
  color: #000000;
}

.btn-cyan:hover {
  background: var(--cyan-hover);
  box-shadow: 0 0 15px var(--cyan-glow);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--border-strong);
}

.btn-outline:hover {
  border-color: var(--neon-yellow);
  color: var(--neon-yellow);
  background: var(--bg-surface-elevated);
}

.btn-sm {
  padding: 0.35rem 0.75rem;
  font-size: 0.75rem;
}

/* ── CONTAINER & HEADER ─────────────────────────────────── */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
}

.page-header {
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-subtle);
}

.page-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--neon-yellow);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 0.5rem;
  display: block;
}

.page-title {
  font-size: 2.2rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 0.5rem;
}

.page-desc {
  color: var(--text-muted);
  font-size: 0.95rem;
  max-width: 650px;
}

/* ── CARDS ───────────────────────────────────────────────── */
.card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  transition: all var(--transition);
}

.card:hover {
  border-color: var(--border-strong);
  box-shadow: 0 4px 20px rgba(0,0,0,0.6);
}

.card-yellow {
  border-left: 3px solid var(--neon-yellow);
}

.card-cyan {
  border-left: 3px solid var(--neon-cyan);
}

/* ── GRID SYSTEM ─────────────────────────────────────────── */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

@media (max-width: 768px) {
  .grid-2, .grid-3 {
    grid-template-columns: 1fr;
  }
}

/* ── BOARD STYLES ────────────────────────────────────────── */
.board-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 2rem;
  min-height: calc(100vh - var(--nav-h) - 5rem);
}

@media (max-width: 768px) {
  .board-layout {
    grid-template-columns: 1fr;
  }
}

.sidebar-menu {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.sidebar-group-title {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 0.5rem;
}

.channel-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.6rem 0.8rem;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.85rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  font-family: var(--font-mono);
}

.channel-btn:hover, .channel-btn.active {
  color: var(--neon-yellow);
  background: var(--bg-surface-elevated);
}

.thread-row {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin-bottom: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  text-decoration: none;
  transition: all var(--transition);
}

.thread-row:hover {
  border-color: var(--neon-cyan);
  transform: translateX(4px);
}

.thread-title {
  font-size: 1rem;
  font-weight: 600;
  color: #ffffff;
  margin-bottom: 0.3rem;
}

.thread-meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  display: flex;
  gap: 1rem;
}

.thread-badge {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  background: var(--neon-yellow);
  color: #000000;
  font-weight: bold;
}

/* ── MODALS ──────────────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.85);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
}

.modal-overlay.hidden {
  display: none;
}

.modal-card {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 480px;
  padding: 2rem;
  position: relative;
}

.modal-title {
  font-size: 1.4rem;
  margin-bottom: 1.5rem;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
}

.form-input, .form-textarea {
  width: 100%;
  background: var(--bg-main);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 0.75rem;
  color: #ffffff;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  outline: none;
}

.form-input:focus, .form-textarea:focus {
  border-color: var(--neon-yellow);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

/* ── FOOTER ──────────────────────────────────────────────── */
.footer {
  border-top: 1px solid var(--border-subtle);
  padding: 2rem 1.5rem;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-top: 4rem;
}