/* ============================================================
   KitShop — Design System & Global Styles
   Terminal Green × Tactical Black aesthetic
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Bebas+Neue&family=IBM+Plex+Mono:wght@400;500;600&family=Outfit:wght@300;400;500;600;700&display=swap');

/* ── CSS Custom Properties ─────────────────────────────────── */
:root {
  /* Brand */
  --accent:         #00ff41;
  --accent-dim:     #00cc33;
  --accent-glow:    rgba(0, 255, 65, 0.18);
  --accent-subtle:  rgba(0, 255, 65, 0.06);

  /* Backgrounds */
  --bg-primary:     #070808;
  --bg-secondary:   #0d0f0d;
  --bg-card:        #111311;
  --bg-elevated:    #181a18;
  --bg-hover:       #1e211e;

  /* Borders */
  --border:         rgba(0, 255, 65, 0.12);
  --border-hover:   rgba(0, 255, 65, 0.35);
  --border-strong:  rgba(0, 255, 65, 0.55);

  /* Text */
  --text-primary:   #f0f4f0;
  --text-secondary: #8a9a8a;
  --text-muted:     #4a5a4a;
  --text-accent:    #00ff41;

  /* Status */
  --success:        #00ff41;
  --warning:        #ffaa00;
  --danger:         #ff3333;
  --info:           #00aaff;

  /* Typography */
  --font-display:   'Bebas Neue', sans-serif;
  --font-mono:      'IBM Plex Mono', monospace;
  --font-body:      'Outfit', sans-serif;

  /* Spacing */
  --space-xs:       4px;
  --space-sm:       8px;
  --space-md:       16px;
  --space-lg:       24px;
  --space-xl:       40px;
  --space-2xl:      64px;
  --space-3xl:      96px;

  /* Border Radius */
  --radius-sm:      4px;
  --radius-md:      8px;
  --radius-lg:      12px;
  --radius-xl:      20px;

  /* Shadows */
  --shadow-sm:      0 2px 8px rgba(0,0,0,0.4);
  --shadow-md:      0 4px 20px rgba(0,0,0,0.6);
  --shadow-lg:      0 8px 40px rgba(0,0,0,0.8);
  --shadow-glow:    0 0 20px rgba(0, 255, 65, 0.25);
  --shadow-glow-lg: 0 0 40px rgba(0, 255, 65, 0.15);

  /* Layout */
  --max-width:      1280px;
  --nav-height:     64px;

  /* Transitions */
  --transition:     200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.95rem;
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

/* Scanline texture overlay */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0,255,65,0.01) 2px,
    rgba(0,255,65,0.01) 4px
  );
  pointer-events: none;
  z-index: 9999;
}

a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent-dim); }

img { max-width: 100%; height: auto; display: block; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input, select, textarea { font-family: inherit; }

/* ── Scrollbar ──────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg-secondary); }
::-webkit-scrollbar-thumb { background: var(--border-hover); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* ── Typography ─────────────────────────────────────────────── */
.font-display { font-family: var(--font-display); }
.font-mono    { font-family: var(--font-mono); }

h1, h2, h3, h4, h5 { font-weight: 600; line-height: 1.2; }

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.5rem);
  letter-spacing: 0.05em;
  color: var(--text-primary);
}

.section-subtitle {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-sm);
}

/* ── Layout Utilities ───────────────────────────────────────── */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-lg); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-lg); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-lg); }

.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }

/* ── Buttons ────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 12px 28px;
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.05), transparent);
  opacity: 0;
  transition: opacity var(--transition);
}

.btn:hover::before { opacity: 1; }

.btn-primary {
  background: var(--accent);
  color: #000;
  box-shadow: 0 0 0 0 rgba(0,255,65,0);
}
.btn-primary:hover {
  background: var(--accent-dim);
  color: #000;
  box-shadow: var(--shadow-glow);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--border-strong);
}
.btn-outline:hover {
  background: var(--accent-subtle);
  border-color: var(--accent);
  box-shadow: var(--shadow-glow);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
}
.btn-ghost:hover {
  color: var(--text-primary);
  border-color: var(--border-hover);
  background: var(--bg-elevated);
}

.btn-danger {
  background: rgba(255,51,51,0.1);
  color: var(--danger);
  border: 1px solid rgba(255,51,51,0.3);
}
.btn-danger:hover {
  background: rgba(255,51,51,0.2);
  border-color: var(--danger);
}

.btn-sm { padding: 8px 16px; font-size: 0.7rem; }
.btn-lg { padding: 16px 40px; font-size: 0.85rem; }
.btn-full { width: 100%; }

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none !important;
}

/* ── Cards ──────────────────────────────────────────────────── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition);
}

.card:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.card-body { padding: var(--space-lg); }

/* ── Form Elements ──────────────────────────────────────────── */
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  transition: all var(--transition);
  outline: none;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-input::placeholder { color: var(--text-muted); }
.form-textarea { resize: vertical; min-height: 100px; }
.form-select { appearance: none; cursor: pointer; }

/* ── Badge / Tags ───────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 100px;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.badge-accent   { background: var(--accent-subtle); color: var(--accent); border: 1px solid var(--border); }
.badge-success  { background: rgba(0,255,65,0.1); color: #00ff41; }
.badge-warning  { background: rgba(255,170,0,0.1); color: #ffaa00; }
.badge-danger   { background: rgba(255,51,51,0.1); color: #ff4444; }
.badge-info     { background: rgba(0,170,255,0.1); color: #00aaff; }
.badge-neutral  { background: var(--bg-elevated); color: var(--text-secondary); border: 1px solid var(--border); }

/* ── Notifications / Toast ──────────────────────────────────── */
#toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 99999;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.toast {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 12px 20px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-primary);
  box-shadow: var(--shadow-lg);
  animation: toastIn 0.3s ease forwards;
  max-width: 360px;
}

.toast.success { border-left: 3px solid var(--success); }
.toast.error   { border-left: 3px solid var(--danger); }
.toast.warning { border-left: 3px solid var(--warning); }
.toast.info    { border-left: 3px solid var(--info); }
.toast.hide    { animation: toastOut 0.3s ease forwards; }

@keyframes toastIn  { from { opacity: 0; transform: translateX(20px); } to { opacity: 1; transform: translateX(0); } }
@keyframes toastOut { from { opacity: 1; transform: translateX(0); } to { opacity: 0; transform: translateX(20px); } }

/* ── Loading States ─────────────────────────────────────────── */
.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

.skeleton {
  background: linear-gradient(90deg, var(--bg-card) 25%, var(--bg-elevated) 50%, var(--bg-card) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-sm);
}

@keyframes shimmer { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }

/* ── Section Divider ────────────────────────────────────────── */
.section { padding: var(--space-3xl) 0; }
.section-sm { padding: var(--space-2xl) 0; }

.divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
  margin: var(--space-xl) 0;
}

/* ── Accent Line ────────────────────────────────────────────── */
.accent-line {
  width: 48px;
  height: 3px;
  background: var(--accent);
  border-radius: 2px;
  margin-bottom: var(--space-lg);
}

/* ── Modal ──────────────────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.85);
  backdrop-filter: blur(4px);
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-lg);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--bg-card);
  border: 1px solid var(--border-hover);
  border-radius: var(--radius-xl);
  max-width: 560px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  transform: translateY(20px) scale(0.98);
  transition: transform var(--transition);
}

.modal-overlay.active .modal { transform: translateY(0) scale(1); }

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-lg);
  border-bottom: 1px solid var(--border);
}

.modal-title {
  font-family: var(--font-display);
  font-size: 1.4rem;
  letter-spacing: 0.04em;
}

.modal-close {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: all var(--transition);
}
.modal-close:hover { border-color: var(--accent); color: var(--accent); }

.modal-body { padding: var(--space-lg); }
.modal-footer { padding: var(--space-lg); border-top: 1px solid var(--border); display: flex; gap: var(--space-sm); justify-content: flex-end; }

/* ── Responsive ─────────────────────────────────────────────── */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  :root { --nav-height: 56px; }
  .container { padding: 0 var(--space-md); }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .section { padding: var(--space-2xl) 0; }
  .section-title { font-size: 2rem; }
}

/* ── Utility classes ────────────────────────────────────────── */
.text-accent   { color: var(--accent); }
.text-muted    { color: var(--text-muted); }
.text-secondary{ color: var(--text-secondary); }
.text-danger   { color: var(--danger); }
.text-warning  { color: var(--warning); }
.text-sm       { font-size: 0.8rem; }
.text-xs       { font-size: 0.7rem; }
.text-center   { text-align: center; }
.text-mono     { font-family: var(--font-mono); }
.fw-600        { font-weight: 600; }
.mt-sm         { margin-top: var(--space-sm); }
.mt-md         { margin-top: var(--space-md); }
.mt-lg         { margin-top: var(--space-lg); }
.mb-sm         { margin-bottom: var(--space-sm); }
.mb-md         { margin-bottom: var(--space-md); }
.mb-lg         { margin-bottom: var(--space-lg); }
.hidden        { display: none !important; }
.sr-only       { position: absolute; width:1px; height:1px; padding:0; overflow:hidden; clip:rect(0,0,0,0); white-space:nowrap; border:0; }