/* ==============================================
   FORMS & BUTTONS STYLING
   ============================================== */

/* BUTTONS */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 0.5rem;
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.3s ease;
  gap: 0.5rem;
  text-decoration: none;
  white-space: nowrap;
  user-select: none;
  vertical-align: middle;
}

.btn:focus-visible {
  outline: 2px solid #6366f1;
  outline-offset: 2px;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none !important;
}

/* Button Variants */

.btn-primary {
  background-color: #6366f1;
  color: white;
}

.btn-primary:hover:not(:disabled) {
  background-color: #4f46e5;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.btn-primary:active:not(:disabled) {
  transform: translateY(0);
}

.btn-secondary {
  background-color: #ec4899;
  color: white;
}

.btn-secondary:hover:not(:disabled) {
  background-color: #db2777;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(236, 72, 153, 0.3);
}

.btn-success {
  background-color: #10b981;
  color: white;
}

.btn-success:hover:not(:disabled) {
  background-color: #059669;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.btn-warning {
  background-color: #f59e0b;
  color: white;
}

.btn-warning:hover:not(:disabled) {
  background-color: #d97706;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(245, 158, 11, 0.3);
}

.btn-error {
  background-color: #ef4444;
  color: white;
}

.btn-error:hover:not(:disabled) {
  background-color: #dc2626;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}

.btn-outline {
  background-color: transparent;
  color: #6366f1;
  border: 2px solid #6366f1;
}

.btn-outline:hover:not(:disabled) {
  background-color: rgba(99, 102, 241, 0.1);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.2);
}

@media (prefers-color-scheme: dark) {
  .btn-outline {
    color: #818cf8;
    border-color: #818cf8;
  }

  .btn-outline:hover:not(:disabled) {
    background-color: rgba(129, 140, 248, 0.15);
  }
}

.btn-ghost {
  background-color: transparent;
  color: #6366f1;
  border: none;
}

.btn-ghost:hover:not(:disabled) {
  background-color: rgba(99, 102, 241, 0.1);
  color: #4f46e5;
}

/* Button Sizes */

.btn-sm {
  padding: 0.4rem 1rem;
  font-size: 0.875rem;
}

.btn-lg {
  padding: 1rem 2rem;
  font-size: 1.125rem;
}

.btn-xl {
  padding: 1.2rem 2.5rem;
  font-size: 1.25rem;
}

.btn-full {
  width: 100%;
}

/* Button Groups */

.btn-group {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

@media (max-width: 639px) {
  .btn-group {
    flex-direction: column;
  }

  .btn-group .btn {
    width: 100%;
  }
}

/* FORMS */

.form-group {
  margin-bottom: 1.5rem;
}

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

.form-label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: #1e293b;
  font-size: 0.95rem;
}

@media (prefers-color-scheme: dark) {
  .form-label {
    color: #f1f5f9;
  }
}

.form-label.required::after {
  content: ' *';
  color: #ef4444;
}

/* INPUT FIELDS */

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="tel"],
input[type="url"],
input[type="date"],
input[type="time"],
input[type="search"],
textarea,
select {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 2px solid #e2e8f0;
  border-radius: 0.5rem;
  font-family: 'Inter', sans-serif;
  font-size: 1rem;
  color: #1e293b;
  background-color: white;
  transition: all 0.3s ease;
}

@media (prefers-color-scheme: dark) {
  input[type="text"],
  input[type="email"],
  input[type="password"],
  input[type="number"],
  input[type="tel"],
  input[type="url"],
  input[type="date"],
  input[type="time"],
  input[type="search"],
  textarea,
  select {
    background-color: #1f2937;
    color: #f1f5f9;
    border-color: #334155;
  }
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"]:focus,
input[type="number"]:focus,
input[type="tel"]:focus,
input[type="url"]:focus,
input[type="date"]:focus,
input[type="time"]:focus,
input[type="search"]:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: #6366f1;
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

input[type="text"]::placeholder,
input[type="email"]::placeholder,
input[type="password"]::placeholder,
input[type="number"]::placeholder,
input[type="tel"]::placeholder,
input[type="url"]::placeholder,
input[type="search"]::placeholder,
textarea::placeholder {
  color: #9ca3af;
}

/* TEXTAREA */

textarea {
  resize: vertical;
  min-height: 120px;
  font-family: 'Inter', sans-serif;
}

/* CHECKBOXES & RADIO BUTTONS */

input[type="checkbox"],
input[type="radio"] {
  width: 1.2rem;
  height: 1.2rem;
  cursor: pointer;
  accent-color: #6366f1;
}

.checkbox-group,
.radio-group {
  display: flex;
  gap: 1rem;
  flex-direction: column;
}

.checkbox-item,
.radio-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
}

.checkbox-item label,
.radio-item label {
  cursor: pointer;
  margin: 0;
  color: #1e293b;
}

@media (prefers-color-scheme: dark) {
  .checkbox-item label,
  .radio-item label {
    color: #f1f5f9;
  }
}

/* SELECT DROPDOWN */

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='%236366f1' d='M10.293 3.293L6 7.586 1.707 3.293A1 1 0 00.293 4.707l5 5a1 1 0 001.414 0l5-5a1 1 0 10-1.414-1.414z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  padding-right: 2.5rem;
  cursor: pointer;
}

/* FORM VALIDATION */

input:invalid,
textarea:invalid,
select:invalid {
  border-color: #ef4444;
}

input:invalid:focus,
textarea:invalid:focus,
select:invalid:focus {
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

input:valid,
textarea:valid,
select:valid {
  border-color: #10b981;
}

input:valid:focus,
textarea:valid:focus,
select:valid:focus {
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
}

/* ERROR & HELP TEXT */

.form-error {
  color: #ef4444;
  font-size: 0.875rem;
  margin-top: 0.25rem;
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.form-help {
  color: #6b7280;
  font-size: 0.875rem;
  margin-top: 0.25rem;
}

@media (prefers-color-scheme: dark) {
  .form-help {
    color: #9ca3af;
  }
}

/* FORM LAYOUTS */

.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
}

@media (max-width: 639px) {
  .form-row {
    grid-template-columns: 1fr;
  }
}

.form-section {
  margin-bottom: 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid #e2e8f0;
}

@media (prefers-color-scheme: dark) {
  .form-section {
    border-bottom-color: #334155;
  }
}

.form-section:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

/* FORM ACTIONS */

.form-actions {
  display: flex;
  gap: 1rem;
  margin-top: 2rem;
  justify-content: flex-end;
  flex-wrap: wrap;
}

@media (max-width: 639px) {
  .form-actions {
    justify-content: stretch;
  }

  .form-actions .btn {
    width: 100%;
  }
}

/* LOADING STATE */

.btn.loading {
  pointer-events: none;
  opacity: 0.7;
}

.btn.loading::after {
  content: '';
  display: inline-block;
  width: 1rem;
  height: 1rem;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: white;
  animation: spin 0.8s linear infinite;
}

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

/* SWITCH/TOGGLE */

.switch {
  display: inline-flex;
  align-items: center;
  cursor: pointer;
  gap: 0.5rem;
}

.switch-input {
  width: 50px;
  height: 28px;
  appearance: none;
  background-color: #e2e8f0;
  border-radius: 14px;
  cursor: pointer;
  transition: all 0.3s ease;
  border: none;
  position: relative;
}

@media (prefers-color-scheme: dark) {
  .switch-input {
    background-color: #334155;
  }
}

.switch-input::before {
  content: '';
  position: absolute;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background-color: white;
  top: 2px;
  left: 2px;
  transition: all 0.3s ease;
}

.switch-input:checked {
  background-color: #6366f1;
}

.switch-input:checked::before {
  left: 24px;
}

.switch-label {
  font-size: 0.95rem;
  cursor: pointer;
  user-select: none;
}

/* RANGE SLIDER */

input[type="range"] {
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: linear-gradient(to right, #6366f1 0%, #6366f1 50%, #e2e8f0 50%, #e2e8f0 100%);
  outline: none;
  -webkit-appearance: none;
  appearance: none;
  cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background-color: #6366f1;
  cursor: pointer;
  box-shadow: 0 2px 4px rgba(99, 102, 241, 0.3);
}

input[type="range"]::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background-color: #6366f1;
  cursor: pointer;
  border: none;
  box-shadow: 0 2px 4px rgba(99, 102, 241, 0.3);
}