/* =============================================================================
   СЛЕД Design System — Components
   Sharp edges, border-style buttons, terminal aesthetic
   ============================================================================= */

/* -------------------------------------------------------------------------
   Buttons — sharp corners, border style
   ------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 24px;
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
  font-weight: 500;
  line-height: 1;
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border: 1px solid var(--accent);
  border-radius: 0;
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition-smooth);
  background: transparent;
  color: var(--accent);
}

.btn:active { transform: scale(0.97); }
.btn:disabled { opacity: 0.4; cursor: not-allowed; transform: none; }

/* Primary — accent border + filled */
.btn-primary {
  background: var(--accent);
  color: #0A0A0A;
  border-color: var(--accent);
}
.btn-primary:hover {
  background: var(--accent-bright);
  border-color: var(--accent-bright);
  box-shadow: var(--glow-accent);
}

/* Secondary — subtle border */
.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-default);
}
.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* Outline */
.btn-outline {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border-default);
}
.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-subtle);
}

/* Ghost */
.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border-color: transparent;
}
.btn-ghost:hover {
  background: var(--accent-subtle);
  color: var(--text-primary);
  border-color: transparent;
}

/* Success / Danger */
.btn-success { background: var(--success); color: #0A0A0A; border-color: var(--success); }
.btn-success:hover { box-shadow: var(--glow-success); }
.btn-danger { background: var(--error); color: #fff; border-color: var(--error); }
.btn-danger:hover { box-shadow: var(--glow-error); }

/* Sizes */
.btn-sm { padding: 6px 16px; font-size: var(--font-size-xs); }
.btn-lg { padding: 14px 32px; font-size: var(--font-size-base); }
.btn-xl { padding: 18px 40px; font-size: var(--font-size-lg); }

/* Icon button */
.btn-icon {
  width: 40px; height: 40px;
  padding: 0;
  border-radius: 0;
}

/* -------------------------------------------------------------------------
   Cards — sharp edges, thin border
   ------------------------------------------------------------------------- */
.card {
  background: var(--bg-panel);
  border: 1px solid var(--border-subtle);
  border-radius: 0;
  padding: var(--space-xl);
  transition: border-color var(--transition-normal);
}
.card:hover { border-color: var(--border-default); }

.card-interactive:hover {
  border-color: var(--accent);
  cursor: pointer;
}

.card-header {
  padding-bottom: var(--space-md);
  margin-bottom: var(--space-md);
  border-bottom: 1px solid var(--border-subtle);
}

.card-title {
  font-size: var(--font-size-lg);
  font-weight: 500;
  color: var(--text-primary);
}

/* -------------------------------------------------------------------------
   Form Inputs — dark, sharp
   ------------------------------------------------------------------------- */
.form-group { margin-bottom: var(--space-lg); }

.form-label {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 12px 16px;
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  font-weight: 400;
  color: var(--text-primary);
  background: var(--bg-dark);
  border: 1px solid var(--border-default);
  border-radius: 0;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  accent-color: var(--accent);
}

.form-input:hover,
.form-select:hover { border-color: var(--accent); }

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-subtle);
}

.form-input::placeholder { color: var(--text-muted); }

.form-textarea { min-height: 100px; resize: vertical; }

.input-group { position: relative; }
.input-icon {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-dim);
  pointer-events: none;
}
.input-group .form-input { padding-left: 44px; }

.form-input.is-valid { border-color: var(--success); }
.form-input.is-invalid { border-color: var(--error); }
.form-error { margin-top: var(--space-xs); font-size: var(--font-size-sm); color: var(--error); }

/* -------------------------------------------------------------------------
   Badges — mono, uppercase, gold border
   ------------------------------------------------------------------------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  font-size: 11px;
  font-weight: 500;
  border-radius: 0;
  font-family: var(--font-mono);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border: 1px solid;
}

.badge-violet, .badge-accent {
  background: var(--accent-muted);
  color: var(--accent);
  border-color: var(--accent);
}
.badge-success { background: rgba(74, 222, 128, 0.12); color: var(--success); border-color: var(--success); }
.badge-warning { background: rgba(196, 149, 90, 0.12); color: var(--warning); border-color: var(--warning); }
.badge-error { background: rgba(239, 68, 68, 0.12); color: var(--error); border-color: var(--error); }
.badge-info { background: rgba(96, 165, 250, 0.12); color: var(--info); border-color: var(--info); }

/* -------------------------------------------------------------------------
   Progress Bar — thin, elegant
   ------------------------------------------------------------------------- */
.progress {
  height: 3px;
  background: var(--bg-elevated);
  border-radius: 0;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background: var(--accent);
  border-radius: 0;
  transition: width var(--transition-smooth);
}

.progress-bar.animated {
  position: relative;
  overflow: hidden;
}
.progress-bar.animated::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.15), transparent);
  animation: shimmer-bar 1.5s ease-in-out infinite;
}
@keyframes shimmer-bar {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

/* -------------------------------------------------------------------------
   Spinner
   ------------------------------------------------------------------------- */
.spinner {
  width: 20px; height: 20px;
  border: 2px solid var(--border-default);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
.spinner-sm { width: 14px; height: 14px; }
.spinner-lg { width: 36px; height: 36px; border-width: 3px; }
@keyframes spin { to { transform: rotate(360deg); } }

/* -------------------------------------------------------------------------
   Divider with label
   ------------------------------------------------------------------------- */
.divider {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  color: var(--text-dim);
  font-size: var(--font-size-xs);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.divider::before, .divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border-default);
}

/* -------------------------------------------------------------------------
   Avatar
   ------------------------------------------------------------------------- */
.avatar {
  width: 40px; height: 40px;
  border-radius: 0;
  overflow: hidden;
  background: var(--bg-panel);
  border: 1px solid var(--border-default);
}
.avatar img { width: 100%; height: 100%; object-fit: cover; }
.avatar-sm { width: 32px; height: 32px; }
.avatar-lg { width: 56px; height: 56px; }
.avatar-xl { width: 80px; height: 80px; }

/* -------------------------------------------------------------------------
   Stat Card
   ------------------------------------------------------------------------- */
.stat-card {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: var(--space-lg);
  background: var(--bg-panel);
  border: 1px solid var(--border-subtle);
  border-radius: 0;
}

.stat-value {
  font-size: var(--font-size-3xl);
  font-weight: 400;
  font-family: var(--font-mono);
  color: var(--accent);
  letter-spacing: -0.02em;
}

.stat-label {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* -------------------------------------------------------------------------
   Link with animated underline
   ------------------------------------------------------------------------- */
.link-animated {
  position: relative;
  color: var(--accent);
}
.link-animated::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width var(--transition-smooth);
}
.link-animated:hover::after { width: 100%; }

/* -------------------------------------------------------------------------
   Checkbox
   ------------------------------------------------------------------------- */
.checkbox { display: inline-flex; align-items: center; gap: 8px; cursor: pointer; }
.checkbox input {
  appearance: none;
  width: 18px; height: 18px;
  border: 1.5px solid var(--border-bright);
  border-radius: 0;
  background: var(--bg-dark);
  cursor: pointer;
  transition: all var(--transition-fast);
  accent-color: var(--accent);
}
.checkbox input:checked {
  background: var(--accent);
  border-color: var(--accent);
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 16 16' fill='black' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M12.207 4.793a1 1 0 010 1.414l-5 5a1 1 0 01-1.414 0l-2-2a1 1 0 011.414-1.414L6.5 9.086l4.293-4.293a1 1 0 011.414 0z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: center;
}

/* -------------------------------------------------------------------------
   Tooltip (CSS-only)
   ------------------------------------------------------------------------- */
[data-tooltip] { position: relative; }
[data-tooltip]::before {
  content: attr(data-tooltip);
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(-6px);
  padding: 4px 10px;
  font-size: 11px;
  font-family: var(--font-mono);
  white-space: nowrap;
  color: var(--text-primary);
  background: var(--bg-elevated);
  border: 1px solid var(--border-default);
  border-radius: 0;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
  z-index: var(--z-tooltip);
}
[data-tooltip]:hover::before { opacity: 1; visibility: visible; }