/* 模態框樣式 */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal);
    opacity: 0;
    visibility: hidden;
    /* 分離 opacity 和 visibility 的 transition，避免影響子元素 */
    transition: opacity var(--duration-normal) var(--ease-out),
                visibility 0s linear var(--duration-normal);
}

.modal-overlay.show {
    opacity: 1;
    visibility: visible;
    /* 顯示時立即可見，無延遲 */
    transition: opacity var(--duration-normal) var(--ease-out),
                visibility 0s linear 0s;
}

.modal-content {
    background: var(--card-bg);
    border-radius: var(--modal-radius);
    box-shadow: var(--shadow-xl);
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow: hidden; /* 保持圓角剪裁 */
    transform: translateY(-20px);
    /* 統一 transform 和 opacity 動畫，確保內容和背景同步 */
    transition: transform var(--duration-normal) var(--ease-out),
                opacity var(--duration-normal) var(--ease-out);
}

/* 允許下拉選單溢出到 Modal 外部 */
.modal-content:has(.dataset-dropdown-modal[style*="display: block"]) {
    overflow: visible;
}

.modal-overlay.show .modal-content {
    transform: translateY(0);
}

/* Modal 關閉時 - 停用所有子元素的 transition，確保同步消失 */
/* 使用 > * 通配：涵蓋 .modal-content、.user-settings-modal、.feedback-modal 等所有內容容器 */
.modal-overlay:not(.show) > * *,
.modal-overlay:not(.show) > * *::before,
.modal-overlay:not(.show) > * *::after {
    transition: none !important;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--modal-padding);
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    margin: 0;
    font-size: var(--text-xl);
    font-weight: 600;
    color: var(--text-primary);
}

.modal-close {
    background: none;
    border: none;
    padding: 8px;
    cursor: pointer;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    transition: all var(--duration-fast) var(--ease-out);
    /* 🔧 修復：確保按鈕可點擊 */
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close:hover {
    background: var(--neutral-100);
    color: var(--text-primary);
}

/* 🔧 修復：防止 Feather Icons SVG 阻擋按鈕點擊 */
.modal-close svg,
.modal-close i {
    pointer-events: none;
}

.modal-body {
    padding: var(--modal-padding);
    max-height: 60vh;
    overflow-y: auto;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: var(--space-md);
    padding: var(--modal-padding);
    border-top: 1px solid var(--border-color);
    background: var(--neutral-50);
}

/* 表單樣式 */
.form-group {
    margin-bottom: var(--modal-padding);
}

.form-label {
    display: block;
    margin-bottom: var(--space-sm);
    font-weight: var(--font-semibold);
    color: var(--text-primary);
    font-size: var(--text-sm);
}

.form-input {
    width: 100%;
    padding: var(--input-padding-y) var(--input-padding-x);
    border: var(--input-border);
    border-radius: var(--input-radius);
    font-size: var(--text-sm);
    transition: all var(--duration-fast) var(--ease-out);
    background: var(--input-bg);
    color: var(--text-primary);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: var(--input-focus-ring);
}

.form-input::placeholder {
    color: var(--text-tertiary);
}

textarea.form-input {
    resize: vertical;
    min-height: 80px;
}

/* 危險操作模態框樣式 */
.modal-content.modal-danger .modal-header {
    background: var(--bg-error);
    color: white;
}

.modal-content.modal-danger .modal-header h3 {
    color: white;
}

.modal-content.modal-danger .modal-close {
    color: rgba(255, 255, 255, 0.8);
}

.modal-content.modal-danger .modal-close:hover {
    background: rgba(255, 255, 255, 0.1);
    color: white;
}

/* 警告內容樣式 */
.warning-content {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
}

.warning-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-warning);
    color: var(--text-warning);
    border-radius: var(--radius-full);
}

.warning-text {
    flex: 1;
}

.warning-text h4 {
    margin: 0 0 16px 0;
    font-size: var(--text-lg);
    font-weight: 600;
    color: var(--text-primary);
}

.warning-text p {
    margin: 0 0 8px 0;
    color: var(--text-secondary);
    line-height: 1.5;
}

.warning-text ul {
    margin: 8px 0;
    padding-left: 24px;
    color: var(--text-secondary);
}

.warning-text li {
    margin: 4px 0;
}

.warning-note {
    padding: var(--input-padding-y);
    background: var(--bg-error-subtle);
    border: 1px solid var(--border-error);
    border-radius: var(--input-radius);
    margin-top: var(--space-md) !important;
    color: var(--text-error) !important;
    font-size: var(--text-sm);
}

/* 確認輸入框樣式 */
.confirmation-input {
    margin-top: var(--modal-padding);
    padding: var(--space-md);
    background: var(--neutral-50);
    border: 1px solid var(--border-color);
    border-radius: var(--input-radius);
}

.confirmation-input .form-label {
    color: var(--text-primary);
    font-weight: 600;
}

.confirmation-input .form-label strong {
    color: var(--primary);
    font-weight: 600;
}

/* ========== Modal Loading 狀態 ========== */

/* Modal 載入中狀態 */
.modal-content.is-loading {
    position: relative;
    pointer-events: none;
}

.modal-content.is-loading::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.6);
    z-index: 10;
    border-radius: inherit;
}

/* 頂部流動線條 */
.modal-loading-bar {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    overflow: hidden;
    background: var(--primary-alpha-10);
    z-index: 11;
    border-radius: var(--modal-radius) var(--modal-radius) 0 0;
}

.modal-loading-bar-line {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 40%;
    background: var(--primary);
    border-radius: 2px;
    animation: modal-loading-flow 1.6s ease-in-out infinite;
}

@keyframes modal-loading-flow {
    0%   { left: -40%; width: 40%; }
    50%  { left: 30%;  width: 50%; }
    100% { left: 100%; width: 20%; }
}

/* 無障礙 — reduced-motion */
@media (prefers-reduced-motion: reduce) {
    .modal-loading-bar-line {
        animation: none;
        width: 100%;
        left: 0;
    }
}

/* 響應式設計 */
@media (max-width: 768px) {
    .modal-overlay {
        align-items: stretch;
    }

    .modal-content {
        width: 100%;
        max-width: 100%;
        height: var(--app-height);
        max-height: var(--app-height);
        margin: 0;
        border-radius: 0;
        display: flex;
        flex-direction: column;
    }

    .modal-header,
    .modal-footer {
        padding: 16px;
        flex-shrink: 0;
    }

    .modal-body {
        padding: 16px;
        flex: 1;
        max-height: none;
        overflow-y: auto;
    }

    .modal-footer {
        flex-direction: column;
    }

    .modal-footer .btn {
        width: 100%;
        justify-content: center;
    }

    .warning-content {
        flex-direction: column;
        text-align: center;
    }

    .warning-icon {
        margin: 0 auto;
    }
}