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

.btn-accent {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  background: var(--gradient-accent);
  color: var(--color-bg-primary);
  font-family: var(--font-heading);
  font-weight: 700;
  border: none;
  border-radius: var(--radius-full);
  padding: 0.85rem 2rem;
  font-size: var(--text-base);
  cursor: pointer;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  position: relative;
  overflow: hidden;
}

.btn-accent::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
  transition: left 0.5s;
}

.btn-accent:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-accent);
}

.btn-accent:hover::before {
  left: 100%;
}

.btn-accent:active {
  transform: translateY(0);
}

.btn-sm {
  padding: 0.5rem 1.25rem;
  font-size: var(--text-sm);
}

.btn-lg {
  padding: 1rem 2.5rem;
  font-size: var(--text-lg);
}

/* Submit button states */
.btn-submit {
  width: 100%;
  position: relative;
}

.btn-submit .btn-loader {
  display: none;
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-bg-primary);
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

.btn-submit.loading .btn-text {
  opacity: 0;
}

.btn-submit.loading .btn-loader {
  display: block;
  position: absolute;
}

.btn-submit:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none;
}

.btn-submit.success {
  background: linear-gradient(135deg, #22c55e, #4ADE80);
  animation: success-pulse 0.5s cubic-bezier(0.16, 1, 0.3, 1);
  opacity: 1;
  cursor: default;
}

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

/* ===== GLASS CARD ===== */

.glass-card {
  background: var(--gradient-glass);
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  transition: border-color var(--transition-base), transform var(--transition-base);
}

.glass-card:hover {
  border-color: var(--color-border-hover);
}

/* ===== FORM ELEMENTS ===== */

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

.form-group label,
.form-group legend {
  display: block;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xs);
  letter-spacing: 0.02em;
}

.form-group legend {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--space-sm);
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="tel"],
.form-group textarea {
  width: 100%;
  padding: 0.8rem 1rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-primary);
  font-size: var(--text-base);
  transition: border-color var(--transition-base), background var(--transition-base), box-shadow var(--transition-base);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  background: rgba(255, 255, 255, 0.08);
  box-shadow: 0 0 0 3px rgba(215, 210, 203, 0.08), 0 0 20px rgba(215, 210, 203, 0.04);
}

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

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

/* Input error state */
.form-group input.input-error,
.form-group textarea.input-error {
  border-color: var(--color-error);
}

/* Form row (side-by-side) */
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}

.form-row-3 {
  grid-template-columns: 1fr 1fr 1fr;
}

/* ===== SELECT ALL BUTTON ===== */

.btn-select-all {
  display: inline-block;
  padding: 0.5rem 1rem;
  margin-bottom: var(--space-sm);
  border: 1px solid var(--color-border-hover);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-accent);
  background: transparent;
  cursor: pointer;
  transition: all var(--transition-base);
}

.btn-select-all:hover {
  background: rgba(215, 210, 203, 0.08);
  border-color: var(--color-accent);
}

.btn-select-all.all-selected {
  background: rgba(215, 210, 203, 0.1);
  border-color: var(--color-accent);
  color: var(--color-accent-light);
}

/* ===== SIZE FIELDS ===== */

.size-fields {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: var(--space-md);
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height 0.5s cubic-bezier(0.16, 1, 0.3, 1),
              opacity 0.4s ease,
              margin-top 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.size-fields.has-visible {
  max-height: 120px;
  opacity: 1;
}

.size-field {
  overflow: hidden;
}

.size-field[hidden] {
  display: none;
}

/* ===== CHECKBOXES ===== */

.checkbox-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-sm);
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  cursor: pointer;
  padding: 0.6rem 0.8rem;
  border-radius: var(--radius-sm);
  transition: background var(--transition-base);
  font-size: var(--text-base);
}

.checkbox-label:hover {
  background: rgba(255, 255, 255, 0.05);
}

.checkbox-label input[type="checkbox"] {
  display: none;
}

.checkbox-custom {
  width: 22px;
  height: 22px;
  border: 2px solid var(--color-border-hover);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all var(--transition-base);
}

.checkbox-custom::after {
  content: '';
  width: 12px;
  height: 12px;
  border-radius: 2px;
  background: var(--gradient-accent);
  transform: scale(0);
  transition: transform var(--transition-base);
}

.checkbox-label input:checked + .checkbox-custom {
  border-color: var(--color-accent);
  animation: check-pop 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

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

.radio-group {
  display: flex;
  gap: var(--space-md);
}

.radio-label {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  cursor: pointer;
  padding: 0.6rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: all var(--transition-base);
  font-size: var(--text-base);
}

.radio-label:hover {
  border-color: var(--color-border-hover);
  background: rgba(255, 255, 255, 0.03);
}

.radio-label input[type="radio"] {
  display: none;
}

.radio-custom {
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-border-hover);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all var(--transition-base);
}

.radio-custom::after {
  content: '';
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--gradient-accent);
  transform: scale(0);
  transition: transform var(--transition-base);
}

.radio-label input:checked + .radio-custom {
  border-color: var(--color-accent);
}

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

.radio-label:has(input:checked) {
  border-color: var(--color-accent-dark);
  background: rgba(215, 210, 203, 0.06);
}

/* ===== FORM ACTIONS & FEEDBACK ===== */

.form-actions {
  margin-top: var(--space-md);
}

.form-feedback {
  margin-top: var(--space-sm);
  padding: 0;
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  text-align: center;
  transition: all var(--transition-base);
}

.form-feedback:empty {
  display: none;
}

.feedback-success {
  padding: var(--space-sm);
  background: rgba(74, 222, 128, 0.1);
  border: 1px solid rgba(74, 222, 128, 0.3);
  color: var(--color-success);
  animation: feedback-in 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.feedback-error {
  padding: var(--space-sm);
  background: rgba(248, 113, 113, 0.1);
  border: 1px solid rgba(248, 113, 113, 0.3);
  color: var(--color-error);
  animation: feedback-in 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

/* ===== NAV ===== */

.main-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  transition: background var(--transition-base), backdrop-filter var(--transition-base);
}

.main-nav.scrolled {
  background: rgba(14, 27, 22, 0.85);
  backdrop-filter: var(--blur-nav);
  -webkit-backdrop-filter: var(--blur-nav);
  border-bottom: 1px solid var(--color-border);
}

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: var(--space-sm) var(--space-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--text-lg);
}

.nav-logo-img {
  border-radius: 50%;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.nav-links a {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: color var(--transition-base);
}

.nav-links a:hover {
  color: var(--color-text-primary);
}

.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}

.nav-hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text-primary);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.nav-hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translateY(5px) translateX(5px);
}

.nav-hamburger.active span:nth-child(2) {
  opacity: 0;
}

.nav-hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translateY(-5px) translateX(5px);
}