/* ============================================================
   CSS 变量
   ============================================================ */
:root {
    --color-primary: #00cd96;
    --color-primary-light: #e6faf4;
    --color-danger: #a600cf;
    --color-danger-light: #f5e6fa;
    --color-download: #3b82f6;
    --color-download-light: #eff6ff;
    --color-bg: #f8f9fa;
    --color-card: #ffffff;
    --color-text: #1a1a2e;
    --color-text-secondary: #6b7280;
    --color-border: #e5e7eb;
    --color-border-light: #f0f0f0;
    --radius: 10px;
    --radius-sm: 6px;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-hover: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-modal: 0 20px 60px rgba(0, 0, 0, 0.3);
    --transition: all 0.25s ease;
}

/* ============================================================
   基础样式重置
   ============================================================ */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body, input, textarea, button {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue',
                 Arial, sans-serif, 'Microsoft YaHei', 'PingFang SC';
    font-size: 15px;
    color: var(--color-text);
}

body {
    background: var(--color-bg);
    line-height: 1.6;
    min-height: 100vh;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    text-decoration: underline;
}

/* ============================================================
   主容器
   ============================================================ */
#main_frame {
    width: 95%;
    max-width: 800px;
    margin: 0 auto;
    padding: 0 15px 30px;
}

/* ============================================================
   标题
   ============================================================ */
.title {
    font-size: 1.75em;
    font-weight: 700;
    text-align: center;
    margin: 24px 0 20px;
    color: var(--color-text);
    letter-spacing: -0.02em;
}

/* ============================================================
   输入区域
   ============================================================ */
.input_frame_1 {
    width: 100%;
    margin-bottom: 24px;
    background: var(--color-card);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow);
    border: 1px solid var(--color-border-light);
}

.input_form {
    width: 100%;
}

.input_table {
    display: flex;
    flex-direction: column;
    gap: 12px;
    width: 100%;
}

.input_table_area {
    flex: 1;
}

.input_area {
    width: 100%;
    height: 8em;
    padding: 12px 14px;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-sm);
    resize: vertical;
    font-family: inherit;
    font-size: 15px;
    line-height: 1.6;
    transition: var(--transition);
    background: var(--color-bg);
    color: var(--color-text);
}

.input_area:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 205, 150, 0.15);
    background: #fff;
}

.input_area::placeholder {
    color: var(--color-text-secondary);
    opacity: 0.6;
}

/* ============================================================
   按钮容器
   ============================================================ */
.input_table_buttons {
    display: flex;
    gap: 8px;
    justify-content: flex-start;
    flex-wrap: wrap;
}

/* ============================================================
   按钮通用样式
   ============================================================ */
.input_button_submit,
.input_button_upload_img,
.input_button_upload_file,
.input_button_clear {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 5em;
    padding: 8px 18px;
    background: transparent;
    border-radius: var(--radius-sm);
    border: 1.5px solid;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
    white-space: nowrap;
}

.input_button_submit {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background: var(--color-primary-light);
}
.input_button_submit:hover {
    background: var(--color-primary);
    color: #fff;
    box-shadow: 0 2px 8px rgba(0, 205, 150, 0.3);
}

.input_button_upload_img {
    border-color: var(--color-download);
    color: var(--color-download);
    background: var(--color-download-light);
}
.input_button_upload_img:hover {
    background: var(--color-download);
    color: #fff;
    box-shadow: 0 2px 8px rgba(59, 130, 246, 0.3);
}

.input_button_upload_file {
    border-color: #f59e0b;
    color: #d97706;
    background: #fffbeb;
}
.input_button_upload_file:hover {
    background: #f59e0b;
    color: #fff;
    box-shadow: 0 2px 8px rgba(245, 158, 11, 0.3);
}

.input_button_clear {
    border-color: var(--color-danger);
    color: var(--color-danger);
    background: var(--color-danger-light);
}
.input_button_clear:hover {
    background: var(--color-danger);
    color: #fff;
    box-shadow: 0 2px 8px rgba(166, 0, 207, 0.3);
}

.input_button_submit:active,
.input_button_upload_img:active,
.input_button_upload_file:active,
.input_button_clear:active {
    transform: scale(0.97);
}

/* ============================================================
   拖拽上传区域
   ============================================================ */
.drop_zone {
    margin-top: 12px;
    padding: 80px 16px;
    border: 2px dashed var(--color-border);
    border-radius: var(--radius);
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
    background: var(--color-bg);
}

.drop_zone:hover,
.drop_zone.drag_over {
    border-color: var(--color-primary);
    background: var(--color-primary-light);
}

.drop_zone_text {
    font-size: 15px;
    color: var(--color-text-secondary);
    margin-bottom: 4px;
}

.drop_zone_hint {
    font-size: 12px;
    color: var(--color-text-secondary);
    opacity: 0.7;
}

/* ============================================================
   上传进度条
   ============================================================ */
.upload_progress {
    margin-top: 12px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.progress_bar {
    flex: 1;
    height: 8px;
    background: var(--color-border-light);
    border-radius: 4px;
    overflow: hidden;
}

.progress_fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--color-primary), #00e6a8);
    border-radius: 4px;
    transition: width 0.2s ease;
}

.progress_text {
    font-size: 13px;
    color: var(--color-text-secondary);
    min-width: 3em;
    text-align: right;
}

/* ============================================================
   列表区域
   ============================================================ */
#list_table {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.list_loading {
    text-align: center;
    padding: 30px 20px;
    color: var(--color-text-secondary);
    font-size: 14px;
}

.empty-hint {
    text-align: center;
    padding: 40px 20px;
    color: var(--color-text-secondary);
    font-size: 14px;
    opacity: 0.7;
}

/* ============================================================
   列表卡片
   ============================================================ */
.list_row {
    display: flex;
    flex-direction: column;
    background: var(--color-card);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius);
    padding: 16px 16px 16px 20px;
    min-height: 3em;
    transition: var(--transition);
    position: relative;
    box-shadow: var(--shadow);
}

.list_row:hover {
    box-shadow: var(--shadow-hover);
    border-color: var(--color-border);
}

/* 内容区域 */
.left_td {
    flex: 1;
    white-space: pre-wrap;
    word-wrap: break-word;
    word-break: break-word;
    margin-bottom: 10px;
}

.text_p {
    width: 100%;
    word-wrap: break-word;
    word-break: break-word;
    margin: 0;
    padding: 0;
    line-height: 1.7;
    font-size: 15px;
}

/* 时间戳 */
.item_time {
    display: block;
    font-size: 12px;
    color: var(--color-text-secondary);
    opacity: 0.6;
    margin-top: 6px;
}

/* ============================================================
   颜色指示器
   ============================================================ */
.list_even, .list_odd {
    width: 4px;
    height: 100%;
    position: absolute;
    left: 0;
    top: 0;
    border-radius: var(--radius) 0 0 var(--radius);
}

.list_even {
    background: linear-gradient(180deg, var(--color-primary), #00e6a8);
}

.list_odd {
    background: linear-gradient(180deg, var(--color-danger), #d946ef);
}

/* ============================================================
   图片预览
   ============================================================ */
.image_preview {
    margin-bottom: 8px;
}

.preview_img {
    max-width: 100%;
    max-height: 300px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    object-fit: contain;
    display: block;
}

.preview_img:hover {
    opacity: 0.9;
    box-shadow: var(--shadow-hover);
}

/* ============================================================
   文件卡片
   ============================================================ */
.file_card {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 0;
}

.file_icon {
    font-size: 28px;
    line-height: 1;
}

.file_detail {
    flex: 1;
    min-width: 0;
}

.file_name {
    font-size: 14px;
    font-weight: 500;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.file_info {
    font-size: 13px;
    color: var(--color-text-secondary);
    margin-top: 4px;
}

.file_size {
    font-size: 12px;
    color: var(--color-text-secondary);
    opacity: 0.7;
    margin-left: 8px;
}

/* ============================================================
   操作按钮区域
   ============================================================ */
.right_td {
    display: flex;
    gap: 8px;
    justify-content: flex-end;
    flex-wrap: wrap;
}

.tdbutton {
    display: inline-block;
    min-width: 4em;
    /* padding: 4px 14px; */
    background: transparent;
    border-radius: var(--radius-sm);
    border: 1.5px solid;
    cursor: pointer;
    font-size: 13px;
    font-weight: 500;
    transition: var(--transition);
    text-decoration: none;
    text-align: center;
    line-height: 1.6;
    vertical-align: middle;
}

.cpbt {
    border-color: var(--color-primary);
    color: var(--color-primary);
}
.cpbt:hover {
    background: var(--color-primary);
    color: #fff;
}

.delbt {
    border-color: var(--color-danger);
    color: var(--color-danger);
}
.delbt:hover {
    background: var(--color-danger);
    color: #fff;
}

.dlbt {
    border-color: var(--color-download);
    color: var(--color-download);
}
.dlbt:hover {
    background: var(--color-download);
    color: #fff;
    text-decoration: none;
}

.tdbutton:active {
    transform: scale(0.95);
}

/* ============================================================
   通知提示
   ============================================================ */
#notice {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.9);
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 14px 28px;
    border-radius: var(--radius);
    z-index: 2000;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease, transform 0.3s ease;
    backdrop-filter: blur(8px);
}

#notice.notice-show {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
}

#notice_inner {
    font-size: 15px;
    white-space: nowrap;
}

/* ============================================================
   图片大图弹窗
   ============================================================ */
.image_modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 3000;
}

.image_modal.modal_show {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal_overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
}

.modal_content {
    position: relative;
    z-index: 1;
    max-width: 90vw;
    max-height: 90vh;
}

.modal_content img {
    max-width: 90vw;
    max-height: 85vh;
    object-fit: contain;
    border-radius: var(--radius);
    box-shadow: var(--shadow-modal);
}

.modal_close {
    position: absolute;
    top: -12px;
    right: -12px;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.3);
    font-size: 16px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    line-height: 1;
}

.modal_close:hover {
    background: rgba(0, 0, 0, 0.9);
    transform: scale(1.1);
}

/* ============================================================
   页脚
   ============================================================ */
#footer {
    text-align: center;
    width: 100%;
    margin: 10px auto 0;
    padding: 16px 0;
    border-top: 1px solid var(--color-border-light);
    color: var(--color-text-secondary);
    font-size: 13px;
}

/* ============================================================
   响应式 - 移动端 (<=768px)
   ============================================================ */
@media screen and (max-width: 768px) {
    body {
        font-size: 15px;
    }

    #main_frame {
        width: 100%;
        padding: 0 12px 20px;
    }

    .title {
        font-size: 1.4em;
        margin: 16px 0 14px;
    }

    .input_frame_1 {
        padding: 14px;
        border-radius: var(--radius-sm);
    }

    .input_table_buttons {
        justify-content: center;
    }

    .input_button_submit,
    .input_button_upload_img,
    .input_button_upload_file,
    .input_button_clear {
        flex: 1;
        min-width: 0;
        padding: 8px 10px;
        font-size: 13px;
    }

    .right_td {
        justify-content: center;
    }

    .tdbutton {
        flex: 1;
        min-width: 0;
        font-size: 13px;
    }

    .list_row {
        padding: 12px 12px 12px 16px;
        border-radius: var(--radius-sm);
    }

    .drop_zone {
        padding: 18px 12px;
    }
}

/* ============================================================
   响应式 - 大屏幕 (>=900px)
   ============================================================ */
@media screen and (min-width: 900px) {
    .list_row {
        flex-direction: row;
        align-items: flex-start;
    }

    .left_td {
        margin-bottom: 0;
        margin-right: 16px;
    }

    .right_td {
        flex-shrink: 0;
        align-self: center;
    }
}