/**
 * 📋 Enhanced Form Styles
 * Modern form styling with validation states, animations, and accessibility
 */

/* ==========================================================================
   Base Form Styles
   ========================================================================== */

.form-container {
    max-width: 600px;
    margin: 0 auto;
    padding: 2rem;
    background: var(--card-bg);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    transition: var(--transition-smooth);
}

.form-header {
    text-align: center;
    margin-bottom: 2rem;
}

.form-header h2 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    font-size: 2rem;
    font-weight: 700;
}

.form-header p {
    color: var(--text-muted);
    font-size: 1.1rem;
}

/* ==========================================================================
   Form Groups and Fields
   ========================================================================== */

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

.form-row {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.form-row .form-group {
    flex: 1;
    margin-bottom: 0;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-label.required::after {
    content: ' *';
    color: var(--error-color);
    font-weight: 700;
}

/* ==========================================================================
   Input Styles
   ========================================================================== */

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-family: inherit;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: var(--transition-base);
    outline: none;
    box-sizing: border-box;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    border-color: var(--accent-mint, #53eeae);
    box-shadow: 0 0 0 3px rgba(83, 238, 174, 0.2);
    transform: translateY(-1px);
}

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

.form-select {
    cursor: pointer;
    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='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
    background-position: right 1rem center;
    background-repeat: no-repeat;
    background-size: 1rem;
    padding-right: 3rem;
    appearance: none;
}

/* Placeholder Styling */
.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--text-muted);
    opacity: 1;
}

/* ==========================================================================
   Validation States
   ========================================================================== */

/* Valid State */
.form-input.field-valid,
.form-textarea.field-valid,
.form-select.field-valid {
    border-color: var(--success-color);
    background-color: rgba(var(--success-rgb), 0.02);
}

.form-input.field-valid:focus,
.form-textarea.field-valid:focus,
.form-select.field-valid:focus {
    border-color: var(--success-color);
    box-shadow: 0 0 0 3px rgba(var(--success-rgb), 0.1);
}

/* Invalid State */
.form-input.field-invalid,
.form-textarea.field-invalid,
.form-select.field-invalid {
    border-color: var(--error-color);
    background-color: rgba(var(--error-rgb), 0.02);
    animation: shake 0.5s ease-in-out;
}

.form-input.field-invalid:focus,
.form-textarea.field-invalid:focus,
.form-select.field-invalid:focus {
    border-color: var(--error-color);
    box-shadow: 0 0 0 3px rgba(var(--error-rgb), 0.1);
}

/* Shake Animation for Errors */
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-3px); }
    20%, 40%, 60%, 80% { transform: translateX(3px); }
}

/* Field Error Messages */
.field-error {
    color: var(--error-color);
    font-size: 0.85rem;
    font-weight: 500;
    margin-top: 0.5rem;
    padding: 0.5rem 0.75rem;
    background-color: rgba(var(--error-rgb), 0.1);
    border-radius: var(--border-radius);
    border-left: 3px solid var(--error-color);
    animation: slideDown 0.3s ease-out;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==========================================================================
   Submit Button
   ========================================================================== */

.form-submit {
    width: 100%;
    padding: 1rem 2rem;
    background: var(--primary-color);
    color: white;
    border: 1px solid var(--primary-color);
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    text-transform: none;
    letter-spacing: 0;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    margin-top: 1rem;
    box-shadow: 0 4px 12px rgba(139, 126, 247, 0.2);
}

.form-submit:hover:not(:disabled) {
    background: var(--accent-mint, #53eeae);
    border-color: var(--accent-mint, #53eeae);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(83, 238, 174, 0.3);
}

.form-submit:active:not(:disabled) {
    transform: translateY(0);
}

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

/* Loading State */
.form-submit.loading {
    color: transparent;
    cursor: not-allowed;
}

.form-submit.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 24px;
    height: 24px;
    margin: -12px 0 0 -12px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
}

/* Loading Spinner */
.loading-spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
    margin-right: 0.5rem;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ==========================================================================
   Form Messages
   ========================================================================== */

.form-message {
    padding: 1rem 1.25rem;
    border-radius: var(--border-radius);
    font-weight: 500;
    margin-bottom: 1.5rem;
    border-left: 4px solid;
    animation: slideDown 0.3s ease-out;
}

.form-message.success {
    background-color: rgba(var(--success-rgb), 0.1);
    color: var(--success-color);
    border-left-color: var(--success-color);
}

.form-message.error {
    background-color: rgba(var(--error-rgb), 0.1);
    color: var(--error-color);
    border-left-color: var(--error-color);
}

.form-message.info {
    background-color: rgba(var(--primary-rgb), 0.1);
    color: var(--primary-color);
    border-left-color: var(--primary-color);
}

.form-message.warning {
    background-color: rgba(255, 193, 7, 0.1);
    color: #d4910a;
    border-left-color: #d4910a;
}

/* ==========================================================================
   Checkbox and Radio Styles
   ========================================================================== */

.form-checkbox,
.form-radio {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
    cursor: pointer;
}

.form-checkbox input,
.form-radio input {
    width: 20px;
    height: 20px;
    cursor: pointer;
    accent-color: var(--accent-mint, #53eeae);
}

.form-checkbox label,
.form-radio label {
    cursor: pointer;
    margin: 0;
    font-weight: 400;
    text-transform: none;
    letter-spacing: normal;
}

/* ==========================================================================
   File Input Styling
   ========================================================================== */

.form-file {
    position: relative;
    display: inline-block;
    width: 100%;
}

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

.form-file-label {
    display: block;
    padding: 1rem;
    border: 2px dashed var(--border-color);
    border-radius: var(--border-radius);
    text-align: center;
    background-color: var(--bg-primary);
    color: var(--text-muted);
    cursor: pointer;
    transition: var(--transition-base);
}

.form-file:hover .form-file-label {
    border-color: var(--primary-color);
    background-color: rgba(var(--primary-rgb), 0.05);
}

.form-file input:focus + .form-file-label {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(var(--primary-rgb), 0.1);
}

/* ==========================================================================
   Input Groups
   ========================================================================== */

.input-group {
    display: flex;
    position: relative;
}

.input-group .form-input {
    border-radius: var(--border-radius) 0 0 var(--border-radius);
    border-right: none;
}

.input-group-append {
    display: flex;
    align-items: center;
    padding: 0 1rem;
    background-color: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-left: none;
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
    color: var(--text-muted);
}

/* ==========================================================================
   Form Progress Indicator
   ========================================================================== */

.form-progress {
    margin-bottom: 2rem;
}

.form-progress-bar {
    width: 100%;
    height: 6px;
    background-color: var(--bg-secondary);
    border-radius: 3px;
    overflow: hidden;
}

.form-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    transition: width 0.3s ease;
    border-radius: 3px;
}

/* ==========================================================================
   Floating Labels (Optional Enhancement)
   ========================================================================== */

.form-floating {
    position: relative;
}

.form-floating .form-input,
.form-floating .form-textarea {
    padding: 1.5rem 1rem 0.5rem;
}

.form-floating .form-label {
    position: absolute;
    top: 1rem;
    left: 1rem;
    color: var(--text-muted);
    transition: var(--transition-base);
    pointer-events: none;
    margin-bottom: 0;
    text-transform: none;
    letter-spacing: normal;
}

.form-floating .form-input:focus ~ .form-label,
.form-floating .form-input:not(:placeholder-shown) ~ .form-label,
.form-floating .form-textarea:focus ~ .form-label,
.form-floating .form-textarea:not(:placeholder-shown) ~ .form-label {
    transform: translateY(-0.5rem) scale(0.8);
    color: var(--primary-color);
}

/* ==========================================================================
   Responsive Design
   ========================================================================== */

@media (max-width: 768px) {
    .form-container {
        padding: 1.5rem;
        margin: 0 1rem;
    }
    
    .form-row {
        flex-direction: column;
        gap: 0;
    }
    
    .form-row .form-group {
        margin-bottom: 1.5rem;
    }
    
    .form-header h2 {
        font-size: 1.75rem;
    }
    
    .input-group {
        flex-direction: column;
    }
    
    .input-group .form-input {
        border-radius: var(--border-radius) var(--border-radius) 0 0;
        border-right: 2px solid var(--border-color);
        border-bottom: none;
    }
    
    .input-group-append {
        border-left: 2px solid var(--border-color);
        border-top: none;
        border-radius: 0 0 var(--border-radius) var(--border-radius);
        justify-content: center;
    }
}

/* ==========================================================================
   Dark Mode Enhancements
   ========================================================================== */

@media (prefers-color-scheme: dark) {
    .form-select {
        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='%9ca3af' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
    }
}

[data-theme="dark"] .form-select {
    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='%9ca3af' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
}

/* ==========================================================================
   Accessibility Enhancements
   ========================================================================== */

/* High contrast mode support */
@media (prefers-contrast: high) {
    .form-input,
    .form-textarea,
    .form-select {
        border-width: 3px;
    }
    
    .form-input:focus,
    .form-textarea:focus,
    .form-select:focus {
        box-shadow: 0 0 0 4px rgba(var(--primary-rgb), 0.3);
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    .form-input,
    .form-textarea,
    .form-select,
    .form-submit,
    .field-error,
    .form-message {
        transition: none;
        animation: none;
    }
}

/* Focus indicators for keyboard navigation */
.form-input:focus-visible,
.form-textarea:focus-visible,
.form-select:focus-visible,
.form-submit:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* ==========================================================================
   Print Styles
   ========================================================================== */

@media print {
    .form-container {
        box-shadow: none;
        border: 1px solid #ccc;
    }
    
    .form-submit {
        display: none;
    }
    
    .form-message.error,
    .field-error {
        color: #000;
        background: #f0f0f0;
    }
}