/* ==========================================================================
   COMPONENTS - Reusable UI Patterns
   VisiO Tech - AI Automatizace
   ========================================================================== */

/* ==========================================================================
   BUTTONS
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: var(--font-medium);
  line-height: var(--leading-tight);
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-base);
  min-height: 44px; /* Touch-friendly */
}

.btn:focus {
  outline: 2px solid var(--color-primary-500);
  outline-offset: 2px;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background-color: var(--color-primary-600);
  color: var(--text-primary);
}

.btn-primary:hover:not(:disabled) {
  background-color: var(--color-primary-500);
}

.btn-primary:active:not(:disabled) {
  background-color: var(--color-primary-700);
}

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

.btn-secondary:hover:not(:disabled) {
  background-color: var(--bg-elevated);
  border-color: var(--border-primary);
}

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

.btn-ghost:hover:not(:disabled) {
  background-color: var(--bg-elevated);
  color: var(--text-primary);
}

.btn-large {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-lg);
  min-height: 52px;
}

.btn-small {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  min-height: 36px;
}

/* ==========================================================================
   CARDS
   ========================================================================== */

.card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: all var(--transition-base);
}

.card:hover {
  border-color: var(--border-secondary);
  box-shadow: var(--shadow-md);
}

.card-header {
  padding: var(--space-6);
  border-bottom: 1px solid var(--border-primary);
}

.card-body {
  padding: var(--space-6);
}

.card-footer {
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--border-primary);
}

/* ==========================================================================
   FORMS
   ========================================================================== */

.form-group {
  margin-bottom: var(--space-6);
}

.form-label {
  display: block;
  margin-bottom: var(--space-2);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--text-secondary);
}

.form-input,
.form-textarea,
.form-select {
  display: block;
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  color: var(--text-primary);
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--color-primary-500);
  box-shadow: 0 0 0 3px rgb(99 102 241 / 0.2);
}

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

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

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3E%3Cpath stroke='%23a1a1aa' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3E%3C/svg%3E");
  background-position: right var(--space-3) center;
  background-repeat: no-repeat;
  background-size: 1.5em 1.5em;
  padding-right: var(--space-10);
}

.form-error {
  border-color: var(--color-error);
}

.form-error:focus {
  box-shadow: 0 0 0 3px rgb(239 68 68 / 0.2);
}

.form-error-text {
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-error);
}

.form-help {
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  color: var(--text-muted);
}

/* ==========================================================================
   BADGES
   ========================================================================== */

.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  line-height: var(--leading-normal);
  border-radius: var(--radius-full);
}

.badge-primary {
  background-color: var(--color-primary-600);
  color: var(--text-primary);
}

.badge-secondary {
  background-color: var(--bg-elevated);
  color: var(--text-secondary);
}

.badge-success {
  background-color: rgb(34 197 94 / 0.2);
  color: var(--color-success);
}

.badge-warning {
  background-color: rgb(245 158 11 / 0.2);
  color: var(--color-warning);
}

.badge-error {
  background-color: rgb(239 68 68 / 0.2);
  color: var(--color-error);
}

/* ==========================================================================
   LINKS
   ========================================================================== */

.link {
  color: var(--color-primary-400);
  text-decoration: none;
  transition: color var(--transition-base);
}

.link:hover {
  color: var(--color-primary-300);
  text-decoration: underline;
}

.link:focus {
  outline: 2px solid var(--color-primary-500);
  outline-offset: 2px;
}

/* ==========================================================================
   DIVIDERS
   ========================================================================== */

.divider {
  height: 1px;
  background-color: var(--border-primary);
  border: none;
  margin: var(--space-6) 0;
}

/* ==========================================================================
   UTILITY COMPONENTS
   ========================================================================== */

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}