/* ═══════════════════════════════════════════════════════════
   ns-core.css — TaktChat Neuro Space Design System
   ═══════════════════════════════════════════════════════════ */

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

/* ── Variables ─────────────────────────────────────────────── */
:root {
  /* Background layers */
  --ns-bg-0:        #06070D;
  --ns-bg-1:        #0C0E1A;
  --ns-bg-2:        #141728;
  --ns-bg-3:        #1C2138;

  /* Borders */
  --ns-border:      #232844;
  --ns-border-soft: #1A1E35;

  /* Text */
  --ns-text:        #E6E9F5;
  --ns-text-dim:    #9098B8;
  --ns-text-mute:   #5A6388;

  /* Accents */
  --ns-cyan:        #00E5FF;
  --ns-cyan-soft:   #00E5FF22;
  --ns-cyan-mid:    #00E5FF44;
  --ns-violet:      #A557FF;
  --ns-violet-soft: #A557FF22;
  --ns-violet-mid:  #A557FF44;

  /* State colors */
  --ns-success:     #4DFFB0;
  --ns-warn:        #FFC857;
  --ns-danger:      #FF5C7A;

  /* Gradients */
  --ns-grad-main:   linear-gradient(135deg, #00E5FF 0%, #A557FF 100%);
  --ns-grad-bg:     radial-gradient(ellipse at top, #141728 0%, #06070D 60%);
  --ns-grad-card:   linear-gradient(135deg, #141728 0%, #0C0E1A 100%);

  /* Glows */
  --ns-glow-cyan:   0 0 20px #00E5FF55, 0 0 4px #00E5FFaa;
  --ns-glow-violet: 0 0 20px #A557FF55, 0 0 4px #A557FFaa;
  --ns-glow-sm:     0 0 8px #00E5FF44;

  /* Spacing */
  --ns-radius:      12px;
  --ns-radius-sm:   8px;
  --ns-radius-pill: 999px;

  /* Transitions */
  --ns-tr:          150ms ease;
  --ns-tr-md:       250ms ease;

  /* Fonts */
  --font-head:      'Unbounded', sans-serif;
  --font-body:      'Inter', sans-serif;
  --font-mono:      'JetBrains Mono', monospace;
}

/* ── Reset & Base ──────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  height: 100%;
}

body {
  font-family: var(--font-body);
  background: var(--ns-bg-0);
  color: var(--ns-text);
  line-height: 1.55;
  min-height: 100%;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--ns-cyan); text-decoration: none; transition: color var(--ns-tr); }
a:hover { color: #66eeff; }

img, svg { display: block; max-width: 100%; }

input, textarea, button, select {
  font-family: inherit;
  font-size: inherit;
}

/* ── Grid background (neurogrid) ───────────────────────────── */
.ns-neurogrid {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    linear-gradient(rgba(0,229,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,229,255,0.025) 1px, transparent 1px);
  background-size: 40px 40px;
}

/* ── Typography ────────────────────────────────────────────── */
.ns-title {
  font-family: var(--font-head);
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
}

.ns-label {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 0.7rem;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--ns-text-dim);
}

.ns-mono {
  font-family: var(--font-mono);
  font-size: 0.85em;
}

/* ── Scrollbar ─────────────────────────────────────────────── */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: var(--ns-bg-1); }
::-webkit-scrollbar-thumb {
  background: var(--ns-border);
  border-radius: 99px;
}
::-webkit-scrollbar-thumb:hover { background: var(--ns-text-mute); }
* { scrollbar-width: thin; scrollbar-color: var(--ns-border) var(--ns-bg-1); }

/* ── Buttons ───────────────────────────────────────────────── */
.ns-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border: none;
  border-radius: var(--ns-radius-sm);
  font-family: var(--font-head);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  cursor: pointer;
  transition: all var(--ns-tr);
  outline: none;
  user-select: none;
}

.ns-btn-primary {
  background: var(--ns-grad-main);
  color: #06070D;
}
.ns-btn-primary:hover {
  box-shadow: var(--ns-glow-cyan);
  transform: translateY(-1px);
}

.ns-btn-ghost {
  background: transparent;
  color: var(--ns-text-dim);
  border: 1px solid var(--ns-border);
}
.ns-btn-ghost:hover {
  background: var(--ns-bg-3);
  color: var(--ns-text);
  border-color: var(--ns-cyan);
}

.ns-btn-danger {
  background: transparent;
  color: var(--ns-danger);
  border: 1px solid var(--ns-danger);
}
.ns-btn-danger:hover { background: rgba(255,92,122,0.12); }

.ns-btn-icon {
  width: 36px; height: 36px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--ns-radius-pill);
  background: transparent;
  border: 1px solid var(--ns-border);
  color: var(--ns-text-dim);
  cursor: pointer;
  transition: all var(--ns-tr);
}
.ns-btn-icon:hover {
  background: var(--ns-bg-3);
  color: var(--ns-cyan);
  border-color: var(--ns-cyan);
}

/* ── Round gradient send button ────────────────────────────── */
.ns-send-btn {
  width: 42px; height: 42px;
  border-radius: 50%;
  border: none;
  background: var(--ns-grad-main);
  color: #06070D;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
  transition: all var(--ns-tr);
  font-size: 1.1rem;
}
.ns-send-btn:hover { box-shadow: var(--ns-glow-cyan); transform: scale(1.05); }
.ns-send-btn:active { transform: scale(0.97); }
.ns-send-btn:disabled { opacity: 0.4; cursor: not-allowed; transform: none; box-shadow: none; }

/* ── Input ─────────────────────────────────────────────────── */
.ns-input {
  background: var(--ns-bg-2);
  border: 1px solid var(--ns-border);
  border-radius: var(--ns-radius-sm);
  color: var(--ns-text);
  padding: 10px 14px;
  width: 100%;
  transition: border-color var(--ns-tr), box-shadow var(--ns-tr);
  outline: none;
}
.ns-input::placeholder { color: var(--ns-text-mute); }
.ns-input:focus {
  border-color: var(--ns-cyan);
  box-shadow: 0 0 0 2px var(--ns-cyan-soft);
}

.ns-textarea {
  resize: none;
  overflow-y: auto;
  min-height: 42px;
  max-height: 140px;
  line-height: 1.5;
}

/* ── Badge / chip ──────────────────────────────────────────── */
.ns-badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 9px;
  border-radius: var(--ns-radius-pill);
  font-size: 0.7rem;
  font-weight: 600;
  font-family: var(--font-head);
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.ns-badge-cyan {
  background: var(--ns-cyan-soft);
  color: var(--ns-cyan);
  border: 1px solid var(--ns-cyan-mid);
}

.ns-badge-violet {
  background: var(--ns-violet-soft);
  color: var(--ns-violet);
  border: 1px solid var(--ns-violet-mid);
}

.ns-badge-count {
  background: var(--ns-danger);
  color: #fff;
  min-width: 18px; height: 18px;
  border-radius: 99px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.65rem;
  font-weight: 700;
  font-family: var(--font-mono);
  padding: 0 4px;
}

.ns-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  display: inline-block;
}
.ns-dot-online { background: var(--ns-success); box-shadow: 0 0 6px var(--ns-success); }
.ns-dot-offline { background: var(--ns-text-mute); }

/* ── Card ──────────────────────────────────────────────────── */
.ns-card {
  background: var(--ns-bg-2);
  border: 1px solid var(--ns-border);
  border-radius: var(--ns-radius);
  padding: 16px;
}

/* ── Divider ───────────────────────────────────────────────── */
.ns-divider {
  border: none;
  border-top: 1px solid var(--ns-border-soft);
  margin: 12px 0;
}

/* ── Status indicator ──────────────────────────────────────── */
.ns-conn-status {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.7rem;
  font-family: var(--font-mono);
  color: var(--ns-text-mute);
}
.ns-conn-status.online { color: var(--ns-success); }
.ns-conn-status.offline { color: var(--ns-danger); }
.ns-conn-status.connecting { color: var(--ns-warn); }

/* ── Utility ───────────────────────────────────────────────── */
.ns-flex { display: flex; }
.ns-flex-col { display: flex; flex-direction: column; }
.ns-items-center { align-items: center; }
.ns-justify-between { justify-content: space-between; }
.ns-gap-1 { gap: 4px; }
.ns-gap-2 { gap: 8px; }
.ns-gap-3 { gap: 12px; }
.ns-gap-4 { gap: 16px; }
.ns-text-sm { font-size: 0.8rem; }
.ns-text-xs { font-size: 0.7rem; }
.ns-text-mute { color: var(--ns-text-mute); }
.ns-text-dim { color: var(--ns-text-dim); }
.ns-truncate { overflow: hidden; white-space: nowrap; text-overflow: ellipsis; }
.ns-hidden { display: none !important; }

/* ── Fade animation ────────────────────────────────────────── */
@keyframes ns-fade-in {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes ns-slide-in-right {
  from { opacity: 0; transform: translateX(16px); }
  to   { opacity: 1; transform: translateX(0); }
}
@keyframes ns-slide-in-left {
  from { opacity: 0; transform: translateX(-16px); }
  to   { opacity: 1; transform: translateX(0); }
}
@keyframes ns-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.ns-anim-fade { animation: ns-fade-in var(--ns-tr-md) ease both; }

/* ── Gradient text ─────────────────────────────────────────── */
.ns-grad-text {
  background: var(--ns-grad-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}