/**
 * Simplified assignment interface styles for students.
 *
 * @package    local_simpleassign
 * @copyright  2024
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

/* Hide standard assignment interface for students */
.simple-assign-wrapper-hidden {
    display: none !important;
}

/* Simplified assignment interface container */
.simple-assign-container {
    max-width: 800px;
    margin: 40px auto;
    padding: 20px;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

/* Main upload area */
.simple-assign-upload-area {
    background: #ffffff;
    border: 3px dashed #d1d5db;
    border-radius: 12px;
    padding: 60px 40px;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    min-height: 300px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.simple-assign-upload-area:hover {
    border-color: #3b82f6;
    background: #f0f9ff;
}

.simple-assign-upload-area.drag-over {
    border-color: #10b981;
    background: #ecfdf5;
    transform: scale(1.02);
}

.simple-assign-upload-area.has-file {
    border-color: #10b981;
    background: #f0fdf4;
}

/* Upload icon */
.simple-assign-upload-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    color: #6b7280;
    transition: color 0.3s ease;
}

.simple-assign-upload-area:hover .simple-assign-upload-icon,
.simple-assign-upload-area.drag-over .simple-assign-upload-icon {
    color: #3b82f6;
}

.simple-assign-upload-area.has-file .simple-assign-upload-icon {
    color: #10b981;
}

/* Upload text */
.simple-assign-upload-text {
    font-size: 18px;
    color: #374151;
    margin-bottom: 10px;
    font-weight: 500;
}

.simple-assign-upload-hint {
    font-size: 14px;
    color: #6b7280;
    margin-top: 8px;
}

/* File input (hidden) */
.simple-assign-file-input {
    display: none;
}

/* File info display */
.simple-assign-file-info {
    margin-top: 30px;
    padding: 20px;
    background: #ffffff;
    border-radius: 8px;
    border: 1px solid #e5e7eb;
    display: none;
}

.simple-assign-file-info.show {
    display: block;
}

.simple-assign-file-name {
    font-size: 16px;
    color: #111827;
    font-weight: 500;
    margin-bottom: 8px;
    word-break: break-word;
}

.simple-assign-file-size {
    font-size: 14px;
    color: #6b7280;
}

/* Submit button */
.simple-assign-submit-btn {
    margin-top: 30px;
    padding: 16px 48px;
    font-size: 18px;
    font-weight: 600;
    color: #ffffff;
    background: #10b981;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: none;
    min-width: 200px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.simple-assign-submit-btn.show {
    display: inline-block;
}

.simple-assign-submit-btn:hover:not(:disabled) {
    background: #059669;
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

.simple-assign-submit-btn:active:not(:disabled) {
    transform: translateY(0);
}

.simple-assign-submit-btn:disabled {
    background: #9ca3af;
    cursor: not-allowed;
    opacity: 0.7;
}

/* Success message */
.simple-assign-success {
    display: none;
    text-align: center;
    padding: 60px 40px;
    background: #ffffff;
    border-radius: 12px;
    border: 2px solid #10b981;
}

.simple-assign-success.show {
    display: block;
}

.simple-assign-success-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    color: #10b981;
}

.simple-assign-success-message {
    font-size: 24px;
    color: #111827;
    font-weight: 600;
    margin-top: 20px;
}

/* Loading state */
.simple-assign-loading {
    display: none;
    text-align: center;
    padding: 20px;
}

.simple-assign-loading.show {
    display: block;
}

.simple-assign-spinner {
    border: 4px solid #f3f4f6;
    border-top: 4px solid #3b82f6;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 0 auto;
}

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

/* Error message */
.simple-assign-error {
    display: none;
    margin-top: 20px;
    padding: 16px;
    background: #fef2f2;
    border: 1px solid #fecaca;
    border-radius: 8px;
    color: #991b1b;
    font-size: 14px;
}

.simple-assign-error.show {
    display: block;
}

/* Mobile responsiveness */
@media (max-width: 768px) {
    .simple-assign-container {
        margin: 20px auto;
        padding: 15px;
    }

    .simple-assign-upload-area {
        padding: 40px 20px;
        min-height: 250px;
    }

    .simple-assign-upload-icon {
        width: 60px;
        height: 60px;
    }

    .simple-assign-upload-text {
        font-size: 16px;
    }

    .simple-assign-submit-btn {
        width: 100%;
        padding: 14px 24px;
        font-size: 16px;
    }

    .simple-assign-success-message {
        font-size: 20px;
    }
}

/* Accessibility improvements */
.simple-assign-upload-area:focus {
    outline: 3px solid #3b82f6;
    outline-offset: 2px;
}

.simple-assign-submit-btn:focus {
    outline: 3px solid #3b82f6;
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .simple-assign-upload-area {
        border-width: 4px;
    }

    .simple-assign-submit-btn {
        border: 2px solid #ffffff;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    .simple-assign-upload-area,
    .simple-assign-submit-btn,
    .simple-assign-spinner {
        transition: none;
        animation: none;
    }
}