body {
    font-family: 'Segoe UI', 'Microsoft YaHei', Arial, sans-serif;
    background: linear-gradient(135deg, #e0e7ff 0%, #f8fafc 100%);
    margin: 0;
    min-height: 100vh;
    width: 100vw;
    box-sizing: border-box;
}
.container {
    width: 90vw;
    min-height: 80vh;
    margin: 4vh auto 0 auto;
    background: #fff;
    border-radius: 22px;
    box-shadow: 0 10px 40px #7b8cff22, 0 1.5px 8px #0001;
    padding: 56px 0 40px 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    max-width: 1100px;
    transition: box-shadow 0.3s;
}
h2 {
    text-align: center;
    margin-bottom: 36px;
    font-size: 2.5rem;
    color: #2d3a4a;
    letter-spacing: 2px;
    font-weight: 700;
    text-shadow: 0 2px 8px #7b8cff22;
}
.form-row {
    margin-bottom: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
}
.form-row label {
    margin-right: 12px;
    font-weight: 500;
    color: #3b4252;
}
#fileInput {
    display: none;
}
.drop-zone {
    border: 2.5px dashed #7b8cff;
    border-radius: 14px;
    padding: 48px 0;
    text-align: center;
    color: #5a5a5a;
    background: #f4f7ff;
    cursor: pointer;
    margin-bottom: 20px;
    font-size: 1.15rem;
    transition: background 0.2s, border-color 0.2s;
    width: 96%;
    min-width: 320px;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 120px;
    box-sizing: border-box;
    box-shadow: 0 2px 12px #7b8cff11;
}
.drop-zone.dragover {
    background: #e0eaff;
    border-color: #3b82f6;
}
#resultArea {
    margin-top: 32px;
    width: 90%;
    max-width: 900px;
}
.download-row {
    display: flex;
    justify-content: flex-end;
    margin-top: 8px;
    width: 90%;
    max-width: 900px;
}
.result-block, #previewArea {
    display: flex;
    align-items: flex-start;
    gap: 18px;
}
.ocr-image-preview {
    max-width: 320px;
    max-height: 220px;
    border-radius: 8px;
    box-shadow: 0 1px 8px #0002;
    background: #fff;
    margin-right: 8px;
}
.ocr-text-content {
    flex: 1;
    min-width: 0;
    max-height: 220px;
    overflow-y: auto;
    background: #f7faff;
    border-radius: 8px;
    padding: 12px 16px;
    box-sizing: border-box;
    box-shadow: 0 1px 4px #0001;
    display: flex;
    flex-direction: column;
    position: relative;
}
.copy-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 2px;
    margin-left: 8px;
    border-radius: 4px;
    transition: background 0.2s;
    display: flex;
    align-items: center;
}
.copy-btn:hover {
    background: #e0eaff;
}
.copy-btn svg {
    display: block;
}
.result-block {
    background: #f7faff;
    border-radius: 8px;
    padding: 0;
    margin-bottom: 14px;
    border-left: 4px solid #7b8cff;
    box-shadow: 0 1px 4px #0001;
}
.ocr-text-content pre {
    white-space: pre-wrap;
    word-break: break-all;
    font-size: 1.01rem;
    color: #2d3a4a;
    margin: 0;
}
#downloadBtn {
    margin-top: 22px;
    display: none;
    background: linear-gradient(90deg, #7b8cff 0%, #3b82f6 100%);
    color: #fff;
    border: none;
    border-radius: 6px;
    padding: 10px 28px;
    font-size: 1.08rem;
    cursor: pointer;
    box-shadow: 0 2px 8px #7b8cff22;
    transition: background 0.2s;
}
#downloadBtn:hover {
    background: linear-gradient(90deg, #3b82f6 0%, #7b8cff 100%);
}
#loading {
    display: none;
    text-align: center;
    margin-top: 20px;
    color: #3b82f6;
    font-size: 1.1rem;
}
#fileList {
    margin: 0;
    padding: 0 0 0 20px;
    color: #444;
    font-size: 15px;
    min-height: 24px;
}
#clearBtn {
    margin-left: 18px;
    background: #f3f4f6;
    color: #3b4252;
    border: 1.5px solid #d1d5db;
    border-radius: 6px;
    padding: 7px 18px;
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.2s, border-color 0.2s;
}
#clearBtn:hover {
    background: #e0eaff;
    border-color: #7b8cff;
}
button[type="submit"] {
    background: linear-gradient(90deg, #7b8cff 0%, #3b82f6 100%);
    color: #fff;
    border: none;
    border-radius: 6px;
    padding: 10px 32px;
    font-size: 1.08rem;
    cursor: pointer;
    box-shadow: 0 2px 8px #7b8cff22;
    transition: background 0.2s;
    display: block;
    margin: 0 auto;
}
button[type="submit"]:hover {
    background: linear-gradient(90deg, #3b82f6 0%, #7b8cff 100%);
}
select {
    border-radius: 6px;
    border: 1.5px solid #d1d5db;
    padding: 7px 16px;
    font-size: 1rem;
    background: #f9fafb;
    color: #2d3a4a;
    outline: none;
    transition: border-color 0.2s;
}
select:focus {
    border-color: #7b8cff;
}
#progressArea {
    width: 80%;
    margin: 32px 0 0 0;
    display: none;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}
.progress-bar-bg {
    width: 80%;
    height: 16px;
    background: #e0eaff;
    border-radius: 8px;
    overflow: hidden;
    margin-bottom: 4px;
}
.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, #7b8cff 0%, #3b82f6 100%);
    border-radius: 8px;
    width: 0%;
    transition: width 0.3s;
}
#progressText {
    color: #3b4252;
    font-size: 1rem;
    margin-bottom: 2px;
}
#elapsedTime {
    color: #888;
    font-size: 0.98rem;
    margin-top: 2px;
}
@media (max-width: 900px) {
    .container {
        width: 98vw;
        min-height: 90vh;
        padding: 18px 0 18px 0;
        border-radius: 0;
        box-shadow: none;
    }
    .drop-zone {
        width: 96vw;
        min-width: 0;
        max-width: 100vw;
    }
}
@media (max-width: 600px) {
    .container {
        width: 100vw;
        min-height: 100vh;
        padding: 0;
        border-radius: 0;
        box-shadow: none;
    }
    h2 {
        font-size: 1.3rem;
    }
    .form-row {
        flex-direction: column;
        align-items: stretch;
        width: 100%;
    }
    .form-row label {
        margin-bottom: 6px;
    }
    .drop-zone {
        width: 98vw;
        min-width: 0;
        max-width: 100vw;
        padding: 28px 0;
        min-height: 60px;
        font-size: 1rem;
    }
    #downloadBtn, button[type="submit"] {
        width: 100%;
        margin-left: 0;
        margin-top: 10px;
    }
    #clearBtn {
        width: 100%;
        min-width: 0;
        max-width: 100vw;
        font-size: 0.98rem;
        padding: 7px 10px;
        margin-top: 10px;
        margin-left: 0;
        align-self: stretch;
    }
    #resultArea, .download-row {
        width: 98vw;
        max-width: 100vw;
    }
}