* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: #1a1a1a;
    color: #fff;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.container {
    text-align: center;
    padding: 40px;
    width: 100%;
    max-width: 600px;
}

h1 {
    color: #ff6b6b;
    font-size: 28px;
    margin-bottom: 30px;
    letter-spacing: 2px;
}

.upload-area {
    background: #2a2a2a;
    border: 2px dashed #555;
    border-radius: 10px;
    padding: 40px;
    margin-bottom: 20px;
    transition: all 0.3s ease;
    cursor: pointer;
}

.upload-area:hover,
.upload-area.dragover {
    border-color: #ff6b6b;
    background: #333;
}

.upload-box {
    padding: 20px;
}

.filename {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
}

.select-text {
    color: #888;
    font-size: 14px;
}

.upload-btn {
    background: #333;
    color: #fff;
    border: 1px solid #555;
    padding: 12px 30px;
    font-size: 14px;
    cursor: pointer;
    border-radius: 5px;
    transition: all 0.3s ease;
    letter-spacing: 1px;
}

.upload-btn:hover {
    background: #444;
    border-color: #ff6b6b;
}

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

.status {
    margin-top: 20px;
    font-size: 14px;
    color: #888;
}

.status.error {
    color: #ff6b6b;
}

.status.success {
    color: #4ecdc4;
}