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

::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #151518;
}

::-webkit-scrollbar-thumb {
    background: #2a2a2a;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #333;
}

* {
    scrollbar-width: thin;
    scrollbar-color: #2a2a2a #151518;
}

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: #0f0f12;
    color: #eaeaea;
    min-height: 100vh;
    padding: 24px;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    background: #151518;
    border-radius: 14px;
    border: 1px solid #222;
}

.header {
    padding: 28px 32px;
    border-bottom: 1px solid #222;
}

.header h1 {
    font-size: 1.6rem;
    font-weight: 600;
}

.header p {
    margin-top: 6px;
    color: #9a9a9a;
    font-size: 0.95rem;
}

.main {
    padding: 32px;
}

.tabs {
    display: flex;
    gap: 12px;
    border-bottom: 1px solid #222;
    margin-bottom: 24px;
}

.tab {
    background: none;
    border: none;
    color: #9a9a9a;
    padding: 12px 4px;
    cursor: pointer;
    font-size: 0.95rem;
    border-bottom: 2px solid transparent;
}

.tab.active {
    color: #fff;
    border-bottom-color: #fff;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

textarea,
input {
    width: 100%;
    background: #0f0f12;
    border: 1px solid #2a2a2a;
    border-radius: 10px;
    padding: 14px;
    color: #fff;
    font-size: 0.95rem;
}

textarea:focus,
input:focus {
    outline: none;
    border-color: #444;
}

.drop-zone {
    border: 1px dashed #333;
    border-radius: 12px;
    padding: 40px;
    text-align: center;
    color: #9a9a9a;
    cursor: pointer;
}

.drop-zone.dragover {
    border-color: #666;
    background: #101014;
}

.format-section {
    margin-top: 32px;
}

.format-title {
    font-size: 1rem;
    margin-bottom: 14px;
}

.format-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(90px, 1fr));
    gap: 10px;
}

.format-btn {
    background: #0f0f12;
    border: 1px solid #2a2a2a;
    border-radius: 10px;
    padding: 12px;
    color: #ccc;
    cursor: pointer;
    font-size: 0.9rem;
}

.format-btn.selected {
    background: #fff;
    color: #000;
    border-color: #fff;
}

.convert-btn {
    margin-top: 32px;
    width: 100%;
    padding: 14px;
    background: #fff;
    color: #000;
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    cursor: pointer;
}

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

.message {
    margin-bottom: 20px;
    padding: 12px;
    border-radius: 10px;
    font-size: 0.9rem;
}

.message.error {
    background: #2a1212;
    color: #ff9b9b;
}

.message.success {
    background: #132a1a;
    color: #9bffb5;
}

.loading {
    margin-top: 24px;
    color: #9a9a9a;
}

.preview {
    margin-top: 40px;
}

.preview-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 24px;
}

.preview-item {
    width: 260px;
    flex-shrink: 0;
}

.preview-item img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 10px;
    border: 1px solid #222;
}

.download-btn {
    display: block;
    margin-top: 10px;
    font-size: 0.9rem;
    font-weight: bold;
    color: #fff;
    text-decoration: none;
    text-align: center;
}

.download-all-btn {
    display: block;
    margin: 0 auto;
    padding: 12px 24px;
    background: #fff;
    color: #000;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
}