/**
 * GLASSTERMINAL DESIGN SYSTEM
 * forms.css - Inputs, Buttons & Controls
 *
 * Futuristic form elements with glass effects,
 * neon accents, and smooth interactions.
 */

/* ============================================
   BASE FORM STYLES
   ============================================ */

form {
  accent-color: var(--color-accent);
}

fieldset {
  margin-bottom: var(--space-6);
}

legend {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-widest);
  color: var(--color-accent);
  padding-bottom: var(--space-2);
  margin-bottom: var(--space-4);
  border-bottom: 1px solid var(--glass-border-glow);
}

label {
  display: block;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
  letter-spacing: var(--letter-spacing-wide);
}

/* ============================================
   TEXT INPUTS
   ============================================ */

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="tel"],
input[type="url"],
input[type="search"],
input[type="date"],
input[type="time"],
input[type="datetime-local"],
textarea,
select {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background: var(--glass-bg-subtle);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  font-family: var(--font-family-mono);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-normal);
  transition:
    background var(--transition-fast) var(--ease-out),
    border-color var(--transition-fast) var(--ease-out),
    box-shadow var(--transition-fast) var(--ease-out);
}

input::placeholder,
textarea::placeholder {
  color: var(--color-text-muted);
  font-style: italic;
}

/* Focus state */
input:focus,
textarea:focus,
select:focus {
  outline: none;
  background: var(--glass-bg-light);
  border-color: var(--color-accent);
  box-shadow:
    0 0 0 3px var(--color-accent-subtle),
    0 0 20px var(--color-accent-subtle),
    var(--glass-shadow-inset);
}

/* Hover state */
input:hover:not(:focus):not(:disabled),
textarea:hover:not(:focus):not(:disabled),
select:hover:not(:focus):not(:disabled) {
  border-color: var(--color-border-medium);
  background: var(--glass-bg-light);
}

/* Disabled state */
input:disabled,
textarea:disabled,
select:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  background: var(--color-bg-surface);
}

/* Invalid state */
input:invalid:not(:placeholder-shown),
textarea:invalid:not(:placeholder-shown) {
  border-color: var(--color-error);
}

input:invalid:not(:placeholder-shown):focus,
textarea:invalid:not(:placeholder-shown):focus {
  box-shadow:
    0 0 0 3px var(--color-error-subtle),
    0 0 20px var(--color-error-subtle);
}

/* ============================================
   INPUT VARIANTS
   ============================================ */

/* Compact input */
input.input-sm,
select.input-sm {
  padding: var(--space-2) var(--space-3);
  font-size: var(--font-size-xs);
}

/* Large input */
input.input-lg,
select.input-lg {
  padding: var(--space-4) var(--space-5);
  font-size: var(--font-size-md);
}

/* Glass input with strong effect */
input.input-glass,
textarea.input-glass,
select.input-glass {
  background: var(--glass-bg-medium);
  backdrop-filter: blur(var(--glass-blur-md));
  -webkit-backdrop-filter: blur(var(--glass-blur-md));
  border: 1px solid var(--glass-border-medium);
}

input.input-glass:focus,
textarea.input-glass:focus,
select.input-glass:focus {
  background: var(--glass-bg-strong);
  border-color: var(--glass-border-glow);
  box-shadow:
    0 0 0 3px var(--color-accent-subtle),
    var(--glow-accent);
}

/* Terminal-style input */
input.input-terminal {
  background: var(--color-bg-deep);
  border: 1px solid var(--color-border-subtle);
  border-left: 3px solid var(--color-accent);
  border-radius: 0;
  padding-left: var(--space-4);
}

input.input-terminal:focus {
  border-left-color: var(--color-accent);
  box-shadow:
    inset 3px 0 0 var(--color-accent),
    0 0 20px var(--color-accent-subtle);
}

/* ============================================
   TEXTAREA
   ============================================ */

textarea {
  min-height: 120px;
  resize: vertical;
  line-height: var(--line-height-relaxed);
}

textarea.textarea-sm {
  min-height: 80px;
}

textarea.textarea-lg {
  min-height: 200px;
}

/* Code textarea */
textarea.textarea-code {
  font-family: var(--font-family-mono);
  font-size: var(--font-size-xs);
  line-height: var(--line-height-relaxed);
  white-space: pre;
  overflow-wrap: normal;
  overflow-x: auto;
}

/* ============================================
   SELECT
   ============================================ */

select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2394a3b8' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-3) center;
  padding-right: var(--space-10);
  cursor: pointer;
}

select:focus {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2322d3ee' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
}

select option {
  background: var(--color-bg-elevated);
  color: var(--color-text-primary);
  padding: var(--space-2);
}

/* ============================================
   CHECKBOX & RADIO
   ============================================ */

input[type="checkbox"],
input[type="radio"] {
  width: 18px;
  height: 18px;
  margin: 0;
  padding: 0;
  accent-color: var(--color-accent);
  cursor: pointer;
}

/* Custom checkbox */
.checkbox {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  cursor: pointer;
}

.checkbox input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.checkbox-indicator {
  width: 18px;
  height: 18px;
  background: var(--glass-bg-subtle);
  border: 1px solid var(--color-border-medium);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  transition:
    background var(--transition-fast) var(--ease-out),
    border-color var(--transition-fast) var(--ease-out),
    box-shadow var(--transition-fast) var(--ease-out);
}

.checkbox-indicator::after {
  content: '';
  width: 10px;
  height: 10px;
  background: var(--color-accent);
  border-radius: 2px;
  transform: scale(0);
  transition: transform var(--transition-fast) var(--ease-bounce);
}

.checkbox input:checked + .checkbox-indicator {
  background: var(--color-accent-subtle);
  border-color: var(--color-accent);
  box-shadow: 0 0 10px var(--color-accent-muted);
}

.checkbox input:checked + .checkbox-indicator::after {
  transform: scale(1);
}

.checkbox input:focus + .checkbox-indicator {
  box-shadow: 0 0 0 3px var(--color-accent-subtle);
}

.checkbox:hover .checkbox-indicator {
  border-color: var(--color-accent);
}

/* Custom radio */
.radio {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  cursor: pointer;
}

.radio input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.radio-indicator {
  width: 18px;
  height: 18px;
  background: var(--glass-bg-subtle);
  border: 1px solid var(--color-border-medium);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  transition:
    background var(--transition-fast) var(--ease-out),
    border-color var(--transition-fast) var(--ease-out),
    box-shadow var(--transition-fast) var(--ease-out);
}

.radio-indicator::after {
  content: '';
  width: 8px;
  height: 8px;
  background: var(--color-accent);
  border-radius: var(--radius-full);
  transform: scale(0);
  transition: transform var(--transition-fast) var(--ease-bounce);
}

.radio input:checked + .radio-indicator {
  background: var(--color-accent-subtle);
  border-color: var(--color-accent);
  box-shadow: 0 0 10px var(--color-accent-muted);
}

.radio input:checked + .radio-indicator::after {
  transform: scale(1);
}

.radio input:focus + .radio-indicator {
  box-shadow: 0 0 0 3px var(--color-accent-subtle);
}

.radio:hover .radio-indicator {
  border-color: var(--color-accent);
}

/* ============================================
   TOGGLE SWITCH
   ============================================ */

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

.toggle input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-track {
  width: 44px;
  height: 24px;
  background: var(--glass-bg-medium);
  border: 1px solid var(--color-border-medium);
  border-radius: var(--radius-full);
  position: relative;
  transition:
    background var(--transition-normal) var(--ease-out),
    border-color var(--transition-normal) var(--ease-out),
    box-shadow var(--transition-normal) var(--ease-out);
}

.toggle-thumb {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 18px;
  height: 18px;
  background: var(--color-text-secondary);
  border-radius: var(--radius-full);
  transition:
    transform var(--transition-normal) var(--ease-bounce),
    background var(--transition-normal) var(--ease-out),
    box-shadow var(--transition-normal) var(--ease-out);
}

.toggle input:checked + .toggle-track {
  background: var(--color-accent-subtle);
  border-color: var(--color-accent);
  box-shadow: var(--glow-accent);
}

.toggle input:checked + .toggle-track .toggle-thumb {
  transform: translateX(20px);
  background: var(--color-accent);
  box-shadow: 0 0 10px var(--color-accent);
}

.toggle input:focus + .toggle-track {
  box-shadow: 0 0 0 3px var(--color-accent-subtle);
}

.toggle:hover .toggle-track {
  border-color: var(--color-accent);
}

/* ============================================
   RANGE SLIDER
   ============================================ */

input[type="range"] {
  -webkit-appearance: none;
  width: 100%;
  height: 6px;
  background: var(--glass-bg-medium);
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border-subtle);
  cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  background: var(--color-accent);
  border-radius: var(--radius-full);
  cursor: pointer;
  box-shadow:
    0 0 10px var(--color-accent-muted),
    0 2px 4px rgba(0, 0, 0, 0.3);
  transition:
    transform var(--transition-fast) var(--ease-out),
    box-shadow var(--transition-fast) var(--ease-out);
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.1);
  box-shadow:
    0 0 20px var(--color-accent-muted),
    0 2px 4px rgba(0, 0, 0, 0.3);
}

input[type="range"]::-moz-range-thumb {
  width: 18px;
  height: 18px;
  background: var(--color-accent);
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
}

input[type="range"]:focus {
  outline: none;
}

input[type="range"]:focus::-webkit-slider-thumb {
  box-shadow:
    0 0 0 3px var(--color-accent-subtle),
    0 0 20px var(--color-accent-muted);
}

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

button,
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  font-family: var(--font-family-mono);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wide);
  color: var(--color-text-primary);
  background: var(--glass-bg-light);
  border: 1px solid var(--color-border-medium);
  border-radius: var(--radius-md);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition:
    background var(--transition-fast) var(--ease-out),
    border-color var(--transition-fast) var(--ease-out),
    box-shadow var(--transition-fast) var(--ease-out),
    transform var(--transition-fast) var(--ease-out);
}

button:hover,
.btn:hover {
  background: var(--glass-bg-medium);
  border-color: var(--color-border-strong);
  transform: translateY(-1px);
}

button:active,
.btn:active {
  transform: translateY(0) scale(0.98);
}

button:focus,
.btn:focus {
  outline: none;
  box-shadow: 0 0 0 3px var(--color-accent-subtle);
}

button:disabled,
.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

/* ============================================
   BUTTON VARIANTS
   ============================================ */

/* Primary button */
.btn-primary {
  background: linear-gradient(
    135deg,
    var(--color-accent-muted) 0%,
    var(--glass-bg-medium) 100%
  );
  border-color: var(--color-accent);
  color: var(--color-accent);
  box-shadow:
    0 0 20px var(--color-accent-subtle),
    var(--glass-shadow-inset);
}

.btn-primary:hover {
  background: linear-gradient(
    135deg,
    var(--color-accent-muted) 0%,
    var(--color-accent-subtle) 100%
  );
  border-color: var(--color-accent-hover);
  box-shadow:
    var(--glow-accent),
    var(--glass-shadow-inset);
}

/* Secondary button */
.btn-secondary {
  background: transparent;
  border: 1px solid var(--color-border-medium);
}

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

/* Ghost button */
.btn-ghost {
  background: transparent;
  border-color: transparent;
}

.btn-ghost:hover {
  background: var(--glass-bg-subtle);
  border-color: var(--color-border-light);
}

/* Danger button */
.btn-danger {
  background: var(--color-error-subtle);
  border-color: var(--color-error);
  color: var(--color-error);
}

.btn-danger:hover {
  background: var(--color-error-muted);
  box-shadow: var(--glow-error);
}

/* Success button */
.btn-success {
  background: var(--color-success-subtle);
  border-color: var(--color-success);
  color: var(--color-success);
}

.btn-success:hover {
  background: var(--color-success-muted);
  box-shadow: var(--glow-success);
}

/* ============================================
   BUTTON SIZES
   ============================================ */

.btn-xs {
  padding: var(--space-1) var(--space-2);
  font-size: var(--font-size-2xs);
}

.btn-sm {
  padding: var(--space-2) var(--space-3);
  font-size: var(--font-size-xs);
}

.btn-lg {
  padding: var(--space-4) var(--space-6);
  font-size: var(--font-size-md);
}

.btn-xl {
  padding: var(--space-5) var(--space-8);
  font-size: var(--font-size-lg);
}

/* Full width button */
.btn-block {
  width: 100%;
}

/* Icon button */
.btn-icon {
  padding: var(--space-3);
  aspect-ratio: 1;
}

.btn-icon.btn-sm {
  padding: var(--space-2);
}

.btn-icon.btn-lg {
  padding: var(--space-4);
}

/* ============================================
   BUTTON WITH EFFECTS
   ============================================ */

/* Shimmer effect */
.btn-shimmer {
  overflow: hidden;
}

.btn-shimmer::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 50%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.1),
    transparent
  );
  transform: skewX(-20deg);
  transition: left 0.6s var(--ease-out);
}

.btn-shimmer:hover::before {
  left: 150%;
}

/* Glow button */
.btn-glow {
  animation: buttonGlow 2s ease-in-out infinite;
}

@keyframes buttonGlow {
  0%, 100% {
    box-shadow:
      0 0 10px var(--color-accent-subtle),
      var(--glass-shadow-inset);
  }
  50% {
    box-shadow:
      0 0 20px var(--color-accent-muted),
      0 0 40px var(--color-accent-subtle),
      var(--glass-shadow-inset);
  }
}

/* Neon button */
.btn-neon {
  background: transparent;
  border: 2px solid var(--color-accent);
  color: var(--color-accent);
  box-shadow:
    0 0 10px var(--color-accent-muted),
    inset 0 0 10px var(--color-accent-subtle);
  text-shadow: 0 0 8px var(--color-accent);
}

.btn-neon:hover {
  background: var(--color-accent-subtle);
  box-shadow:
    0 0 20px var(--color-accent-muted),
    0 0 40px var(--color-accent-subtle),
    inset 0 0 20px var(--color-accent-subtle);
}

/* Glass button */
.btn-glass {
  background: var(--glass-bg-medium);
  backdrop-filter: blur(var(--glass-blur-md));
  -webkit-backdrop-filter: blur(var(--glass-blur-md));
  border: 1px solid var(--glass-border-medium);
  box-shadow: var(--glass-shadow-sm), var(--glass-shadow-inset);
}

.btn-glass:hover {
  background: var(--glass-bg-strong);
  border-color: var(--glass-border-strong);
  box-shadow: var(--glass-shadow-md), var(--glass-shadow-inset);
}

/* ============================================
   BUTTON GROUPS
   ============================================ */

.btn-group {
  display: inline-flex;
}

.btn-group .btn {
  border-radius: 0;
}

.btn-group .btn:first-child {
  border-radius: var(--radius-md) 0 0 var(--radius-md);
}

.btn-group .btn:last-child {
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.btn-group .btn:not(:last-child) {
  border-right: none;
}

.btn-group .btn:hover,
.btn-group .btn:focus {
  z-index: 1;
}

/* ============================================
   FORM GROUPS & LAYOUTS
   ============================================ */

.form-group {
  margin-bottom: var(--space-5);
}

.form-group:last-child {
  margin-bottom: 0;
}

.form-row {
  display: flex;
  gap: var(--space-4);
}

.form-row > * {
  flex: 1;
}

/* Input with icon */
.input-group {
  position: relative;
  display: flex;
}

.input-group input {
  padding-left: var(--space-10);
}

.input-group-icon {
  position: absolute;
  left: var(--space-3);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-muted);
  pointer-events: none;
}

/* Input with addon */
.input-addon {
  display: flex;
  align-items: center;
  padding: 0 var(--space-3);
  background: var(--glass-bg-medium);
  border: 1px solid var(--color-border-light);
  color: var(--color-text-secondary);
  font-size: var(--font-size-xs);
}

.input-addon:first-child {
  border-right: none;
  border-radius: var(--radius-md) 0 0 var(--radius-md);
}

.input-addon:last-child {
  border-left: none;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.input-group input:not(:first-child):not(:last-child) {
  border-radius: 0;
}

.input-group input:first-child {
  border-radius: var(--radius-md) 0 0 var(--radius-md);
}

.input-group input:last-child {
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

/* ============================================
   FORM FEEDBACK
   ============================================ */

.form-hint {
  display: block;
  margin-top: var(--space-1);
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
}

.form-error {
  display: block;
  margin-top: var(--space-1);
  font-size: var(--font-size-xs);
  color: var(--color-error);
}

.form-success {
  display: block;
  margin-top: var(--space-1);
  font-size: var(--font-size-xs);
  color: var(--color-success);
}

/* Input states */
.input-error,
.input-error:focus {
  border-color: var(--color-error);
}

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

.input-success,
.input-success:focus {
  border-color: var(--color-success);
}

.input-success:focus {
  box-shadow: 0 0 0 3px var(--color-success-subtle);
}

/* ============================================
   FILE INPUT
   ============================================ */

.file-input {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
}

.file-input input[type="file"] {
  position: absolute;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
}

.file-input-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  background: var(--glass-bg-light);
  border: 1px dashed var(--color-border-medium);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  cursor: pointer;
  transition:
    background var(--transition-fast) var(--ease-out),
    border-color var(--transition-fast) var(--ease-out);
}

.file-input:hover .file-input-label {
  background: var(--glass-bg-medium);
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* ============================================
   PROGRESS BAR
   ============================================ */

progress {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 8px;
  border: none;
  border-radius: var(--radius-full);
  background: var(--glass-bg-medium);
  overflow: hidden;
}

progress::-webkit-progress-bar {
  background: var(--glass-bg-medium);
  border-radius: var(--radius-full);
}

progress::-webkit-progress-value {
  background: linear-gradient(
    90deg,
    var(--color-accent) 0%,
    var(--color-secondary) 100%
  );
  border-radius: var(--radius-full);
  box-shadow: 0 0 10px var(--color-accent-muted);
  transition: width var(--transition-slow) var(--ease-out);
}

progress::-moz-progress-bar {
  background: linear-gradient(
    90deg,
    var(--color-accent) 0%,
    var(--color-secondary) 100%
  );
  border-radius: var(--radius-full);
}

/* Custom progress bar */
.progress {
  width: 100%;
  height: 8px;
  background: var(--glass-bg-medium);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background: linear-gradient(
    90deg,
    var(--color-accent) 0%,
    var(--color-secondary) 100%
  );
  background-size: 200% 100%;
  border-radius: var(--radius-full);
  box-shadow: 0 0 10px var(--color-accent-muted);
  transition: width var(--transition-slow) var(--ease-out);
  animation: progressShimmer 2s linear infinite;
}

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

/* Progress variants */
.progress-success .progress-bar {
  background: var(--color-success);
  box-shadow: 0 0 10px var(--color-success-muted);
}

.progress-warning .progress-bar {
  background: var(--color-warning);
  box-shadow: 0 0 10px var(--color-warning-muted);
}

.progress-error .progress-bar {
  background: var(--color-error);
  box-shadow: 0 0 10px var(--color-error-muted);
}