/* 留言板样式 */
.message-board-section {
    padding: 80px 20px;
    background: linear-gradient(135deg, #f8f9fa 0%, #e4e7f1 100%);
    position: relative;
}

.message-board-section .container {
    max-width: 800px;
    margin: 0 auto;
}

.message-board-section h2 {
    text-align: center;
    color: var(--accent-color);
    font-size: 2.5rem;
    margin-bottom: 10px;
}

.section-subtitle {
    text-align: center;
    color: var(--text-color);
    font-size: 1.1rem;
    margin-bottom: 40px;
}

/* 留言表单样式 */
.message-form {
    background: white;
    padding: 30px;
    border-radius: 15px;
    box-shadow: var(--shadow);
    margin-bottom: 40px;
}

.message-form .form-group {
    margin-bottom: 20px;
}

.message-form label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-color);
    font-weight: bold;
}

.message-form .input-with-icon {
    position: relative;
}

.message-form .input-with-icon i {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--secondary-color);
    z-index: 1;
}

.message-form input,
.message-form textarea {
    width: 100%;
    padding: 12px 12px 12px 40px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 16px;
    transition: border-color 0.3s;
    font-family: inherit;
}

.message-form textarea {
    min-height: 120px;
    resize: vertical;
}

.message-form input:focus,
.message-form textarea:focus {
    outline: none;
    border-color: var(--accent-color);
}

.char-count {
    text-align: right;
    font-size: 0.9rem;
    color: #666;
    margin-top: 5px;
}

.message-form .submit-btn {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: white;
    border: none;
    padding: 12px 30px;
    border-radius: 25px;
    font-size: 16px;
    cursor: pointer;
    transition: transform 0.3s, box-shadow 0.3s;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.message-form .submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

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

/* 留言列表样式 */
.message-list-container {
    background: white;
    padding: 30px;
    border-radius: 15px;
    box-shadow: var(--shadow);
}

.message-list-container h3 {
    color: var(--accent-color);
    margin-bottom: 20px;
    font-size: 1.5rem;
}

.message-list {
    max-height: 600px;
    overflow-y: auto;
    margin-bottom: 20px;
}

.message-item {
    border-bottom: 1px solid #eee;
    padding: 20px 0;
    animation: fadeIn 0.5s ease;
}

.message-item:last-child {
    border-bottom: none;
}

.message-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.message-user {
    font-weight: bold;
    color: var(--accent-color);
    display: flex;
    align-items: center;
    gap: 8px;
}

.message-time {
    color: #666;
    font-size: 0.9rem;
}

.message-content {
    color: var(--text-color);
    line-height: 1.6;
    margin-bottom: 10px;
}

.message-actions {
    display: flex;
    gap: 10px;
}

.delete-btn {
    background: #ff6b6b;
    color: white;
    border: none;
    padding: 5px 10px;
    border-radius: 3px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: background 0.3s;
}

.delete-btn:hover {
    background: #ff5252;
}

.loading-message,
.error-message,
.no-messages {
    text-align: center;
    padding: 40px 20px;
    color: #666;
    font-style: italic;
}

.error-message {
    color: #ff6b6b;
}

.message-list-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 20px;
}

.load-more-btn {
    background: var(--secondary-color);
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 5px;
    cursor: pointer;
    transition: background 0.3s;
}

.load-more-btn:hover {
    background: #8ab3b4;
}

.load-more-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.pagination-info {
    color: #666;
    font-size: 0.9rem;
}

/* 动画 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .message-board-section {
        padding: 60px 15px;
    }

    .message-form,
    .message-list-container {
        padding: 20px;
    }

    .message-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 5px;
    }

    .message-list-controls {
        flex-direction: column;
        gap: 10px;
        align-items: stretch;
    }

    .load-more-btn {
        order: 2;
    }

    .pagination-info {
        order: 1;
        text-align: center;
    }
}

/* Toast消息样式 */
@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

@keyframes slideOut {
    from { transform: translateX(0); opacity: 1; }
    to { transform: translateX(100%); opacity: 0; }
}

.custom-toast {
    font-family: inherit;
}

.toast-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.toast-close {
    background: none;
    border: none;
    color: white;
    font-size: 18px;
    cursor: pointer;
    margin-left: 10px;
}

/* 输入验证样式 */
.input-error {
    border-color: #e74c3c !important;
    box-shadow: 0 0 5px rgba(231, 76, 60, 0.3) !important;
}

.char-count-warning {
    color: #e74c3c !important;
    font-weight: bold;
}

/* 加载状态 */
.submit-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.icon-loading {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid transparent;
    border-top: 2px solid currentColor;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-right: 5px;
}

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