/* ============================================================
   BUSINESS DIAGNOSTIC PLATFORM — Components
   ============================================================ */

/* ---- Buttons --------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.01em;
  transition: all var(--transition-base);
  cursor: pointer;
  border: 1px solid transparent;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0);
  transition: background var(--transition-fast);
}

.btn:hover::after { background: rgba(255,255,255,0.06); }
.btn:active::after { background: rgba(0,0,0,0.1); }

.btn-primary {
  background: linear-gradient(135deg, #6366F1 0%, #4F52D8 100%);
  color: #FFFFFF;
  border-color: transparent;
  box-shadow: 0 0 0 0 var(--color-primary-glow);
  transition: all var(--transition-base), box-shadow var(--transition-slow);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #4F52D8 0%, #3D40C7 100%);
  box-shadow: 0 0 24px var(--color-primary-glow);
  transform: translateY(-1px);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: none;
}

.btn-secondary {
  background: var(--color-bg-elevated);
  color: var(--color-text-primary);
  border-color: var(--color-border);
}

.btn-secondary:hover {
  background: var(--color-bg-hover);
  border-color: var(--color-border-focus);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
  border-color: transparent;
}

.btn-ghost:hover {
  background: var(--color-bg-hover);
  color: var(--color-text-primary);
}

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

.btn-outline:hover {
  background: var(--color-primary-light);
}

.btn-danger {
  background: var(--color-error-bg);
  color: var(--color-error);
  border-color: rgba(239,68,68,0.2);
}

.btn-danger:hover {
  background: rgba(239,68,68,0.2);
}

.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
  border-radius: var(--radius-lg);
}

.btn-icon {
  padding: var(--space-3);
  border-radius: var(--radius-md);
}

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

/* ---- Cards ----------------------------------------------- */
.card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.card-glass {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}

.card-hover:hover {
  border-color: rgba(99,102,241,0.3);
  box-shadow: 0 0 0 1px rgba(99,102,241,0.15), var(--shadow-md);
}

.card-accent {
  border-color: rgba(99,102,241,0.3);
  box-shadow: 0 0 0 1px rgba(99,102,241,0.1) inset;
}

/* ---- Badges ---------------------------------------------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px var(--space-3);
  border-radius: var(--radius-full);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.badge-primary {
  background: var(--color-primary-light);
  color: var(--color-primary);
  border: 1px solid rgba(99,102,241,0.2);
}

.badge-success {
  background: var(--color-success-bg);
  color: var(--color-success);
  border: 1px solid rgba(34,211,238,0.2);
}

.badge-warning {
  background: var(--color-warning-bg);
  color: var(--color-warning);
  border: 1px solid rgba(245,158,11,0.2);
}

.badge-error {
  background: var(--color-error-bg);
  color: var(--color-error);
  border: 1px solid rgba(239,68,68,0.2);
}

.badge-neutral {
  background: var(--color-bg-hover);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
}

/* ---- Inputs ---------------------------------------------- */
.input-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.input-label {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-primary);
}

.input-label .required {
  color: var(--color-error);
  margin-left: 3px;
}

.input {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg-input);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  font-size: var(--text-sm);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  outline: none;
}

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

.input:focus {
  border-color: var(--color-border-focus);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

.input:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.input.error {
  border-color: var(--color-error);
  box-shadow: 0 0 0 3px var(--color-error-bg);
}

.input-error-msg {
  font-size: var(--text-xs);
  color: var(--color-error);
  display: none;
}

.input.error + .input-error-msg,
.input-group.has-error .input-error-msg,
.input-error-msg:not([hidden]) { display: block; }

.input-wrapper {
  position: relative;
}

.input-icon {
  position: absolute;
  left: var(--space-4);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-muted);
  pointer-events: none;
}

.input-wrapper .input {
  padding-left: 42px;
}

.input-action {
  position: absolute;
  right: var(--space-3);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-muted);
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-1);
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast);
}
.input-action:hover { color: var(--color-text-primary); }

/* ---- Toggle Switch --------------------------------------- */
.toggle {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  cursor: pointer;
}

.toggle input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-track {
  width: 44px;
  height: 24px;
  background: var(--color-bg-hover);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  position: relative;
  transition: background var(--transition-base), border-color var(--transition-base);
  flex-shrink: 0;
}

.toggle-thumb {
  position: absolute;
  width: 18px;
  height: 18px;
  background: var(--color-text-muted);
  border-radius: 50%;
  top: 2px;
  left: 2px;
  transition: transform var(--transition-spring), background var(--transition-base);
}

.toggle input:checked + .toggle-track {
  background: var(--color-primary);
  border-color: var(--color-primary);
}

.toggle input:checked + .toggle-track .toggle-thumb {
  transform: translateX(20px);
  background: #fff;
}

/* ---- Divider --------------------------------------------- */
.divider {
  height: 1px;
  background: var(--color-border);
  width: 100%;
  margin-block: var(--space-6);
}

.divider-vertical {
  width: 1px;
  background: var(--color-border);
  height: 100%;
}

/* ---- KPI Card -------------------------------------------- */
.kpi-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-3) var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.kpi-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-success));
  opacity: 0;
  transition: opacity var(--transition-base);
}

.kpi-card:hover::before { opacity: 1; }

.kpi-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.kpi-icon {
  width: 24px;
  height: 24px;
  border-radius: var(--radius-md);
  background: var(--color-primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  flex-shrink: 0;
}

.kpi-label {
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  font-weight: 400;
}

.kpi-value {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 800;
  line-height: 1;
  color: var(--color-text-primary);
  letter-spacing: -0.03em;
}

.kpi-delta {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: var(--text-xs);
  font-weight: 600;
}

.kpi-delta.up   { color: var(--color-success); }
.kpi-delta.down { color: var(--color-error); }
.kpi-delta.flat { color: var(--color-text-muted); }

/* ---- Feature Icon Card ----------------------------------- */
.feature-card {
  padding: var(--space-8);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
  background: var(--color-bg-elevated);
  transition: all var(--transition-base);
  cursor: default;
}

.feature-card:hover {
  border-color: rgba(99,102,241,0.3);
  box-shadow: var(--shadow-glow), var(--shadow-md);
  transform: translateY(-2px);
}

.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-6);
  font-size: 24px;
}

.feature-icon.indigo {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

.feature-icon.cyan {
  background: var(--color-success-bg);
  color: var(--color-success);
}

.feature-icon.amber {
  background: var(--color-warning-bg);
  color: var(--color-warning);
}

.feature-icon.rose {
  background: var(--color-error-bg);
  color: var(--color-error);
}

.feature-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  margin-bottom: var(--space-3);
  color: var(--color-text-primary);
}

.feature-desc {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: 1.65;
}

/* ---- Step indicator -------------------------------------- */
.step-circle {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 2px solid var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--text-lg);
  color: var(--color-primary);
  flex-shrink: 0;
  position: relative;
  background: var(--color-primary-light);
}

/* ---- Stat counter ---------------------------------------- */
.stat-number {
  font-family: var(--font-display);
  font-size: var(--text-5xl);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1;
  background: linear-gradient(135deg, var(--color-text-primary), var(--color-text-secondary));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stat-label {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-top: var(--space-2);
}

/* ---- Toast ----------------------------------------------- */
.toast-container {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  max-width: 360px;
}

.toast {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background: var(--color-bg-elevated);
  box-shadow: var(--shadow-lg);
  animation: slideUp 0.35s var(--transition-spring) both;
}

.toast-icon { flex-shrink: 0; margin-top: 2px; }
.toast-title { font-size: var(--text-sm); font-weight: 600; color: var(--color-text-primary); }
.toast-msg   { font-size: var(--text-xs); color: var(--color-text-secondary); margin-top: 2px; }

.toast.success { border-color: rgba(34,211,238,0.25); }
.toast.error   { border-color: rgba(239,68,68,0.25); }
.toast.warning { border-color: rgba(245,158,11,0.25); }

/* ---- Nav lang/theme selector ----------------------------- */
.lang-selector {
  display: flex;
  align-items: center;
  gap: 2px;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 3px;
}

.lang-btn {
  padding: 4px 10px;
  border-radius: calc(var(--radius-md) - 2px);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-muted);
  letter-spacing: 0.05em;
  transition: all var(--transition-fast);
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
}

.lang-btn.active,
.lang-btn:hover {
  background: var(--color-primary);
  color: #fff;
}

.theme-btn {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.theme-btn:hover {
  background: var(--color-bg-hover);
  color: var(--color-text-primary);
  border-color: var(--color-primary);
}