* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    background: #0b0b0b;
    font-family: system-ui, -apple-system, BlinkMacSystemFont;
    color: #f5f5f5;
    display: flex;
    align-items: center;
    justify-content: center;
}

.card {
    width: 420px;
    background: #111;
    padding: 30px;
    border-radius: 14px;
    border: 1px solid #222;
    box-shadow: 0 0 40px rgba(255, 204, 0, 0.08);
    text-align: center;
}

h1 {
    margin-bottom: 6px;
    font-size: 26px;
}

.subtitle {
    font-size: 13px;
    color: #aaa;
    margin-bottom: 25px;
}

.upload-box {
    display: block;
    padding: 14px;
    border: 2px dashed #ffcc00;
    border-radius: 10px;
    cursor: pointer;
    color: #ffcc00;
    margin-bottom: 18px;
}

.upload-box input {
    display: none;
}

.btn {
    width: 100%;
    padding: 12px;
    background: #ffcc00;
    color: #000;
    border: none;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
}

.btn:hover {
    background: #ffd633;
}

.result {
    margin-top: 25px;
    border-top: 1px solid #222;
    padding-top: 20px;
}

.preview {
    width: 100%;
    border-radius: 10px;
    border: 1px solid #333;
    margin-bottom: 15px;
}

.yellow {
    color: #ffcc00;
}


.preview-container {
    margin-bottom: 20px;
    padding: 10px;
    border-radius: 12px;
    border: 1px solid #222;
    background: #0e0e0e;
}

.preview-container img {
    width: 100%;
    border-radius: 10px;
    border: 1px solid #333;
}

.hidden {
    display: none;
}

button:disabled {
    background: #444;
    color: #999;
    cursor: not-allowed;
}