:root {
    --primary-color: #d62518;          /* Màu đỏ chính (logo) */
    --primary-hover: #b01c11;          /* Màu đỏ đậm khi hover */
    --secondary-color: #15181e;        /* Màu đen nền chính */
    --card-color: #1c1f26;             /* Màu card/khung tối */
    --text-color: #ffffff;             /* Màu chữ chính */
    --text-secondary: #a0a0a0;         /* Màu chữ phụ */
    --success-color: #00b358;          /* Màu xanh lá cho success */
    --warning-color: #f39c12;          /* Màu cam cảnh báo */
    --error-color: #e74c3c;            /* Màu đỏ lỗi */
    --highlight-color: #ff5722;        /* Màu cam highlight (như các nút "MỚI") */
    --border-color: #2c3035;           /* Màu viền */
    --background-color: #0c0e12;       /* Màu nền tối hơn */
    --processing-color: #f39c12;       /* Màu cho thông báo đang xử lý */
}

body {
    font-family: 'Segoe UI', Tahoma, Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--secondary-color);
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
}

.container {
    width: 90%;
    max-width: 700px;
    margin: 2rem auto;
    background-color: var(--card-color);
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    padding: 2rem;
}

.header {
    text-align: left;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    padding-left: 15px;
}

.header svg {
    width: 60px;
    height: 60px;
    margin-right: 15px;
    fill: var(--primary-color);
}

h1 {
    color: var(--text-color);
    font-size: 1.8rem;
    margin: 0;
    font-weight: 600;
}

.file-info {
    background-color: var(--secondary-color);
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-color);
}

.file-info-grid {
    display: grid;
    grid-template-columns: 60px 1fr;
    grid-gap: 1rem;
    align-items: center;
}

.file-icon {
    width: 60px;
    height: 60px;
    background-color: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--text-secondary);
}

.file-details {
    display: flex;
    flex-direction: column;
}

.file-name {
    font-weight: 600;
    font-size: 1.1rem;
    margin-bottom: 0.25rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.file-size {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.action-buttons {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.action-btn {
    width: 100%;
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 1rem;
    font-size: 1rem;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    transition: background-color 0.2s, transform 0.1s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.action-btn:hover {
    background-color: var(--primary-hover);
}

.action-btn:active {
    transform: scale(0.98);
}

.action-btn:disabled {
    background-color: #555555;
    cursor: not-allowed;
    opacity: 0.7;
}

.action-btn svg {
    width: 18px;
    height: 18px;
}

.progress-container {
    display: none;
    background-color: var(--card-color);
    border-radius: 8px;
    padding: 1.5rem;
    margin-top: 1.5rem;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-color);
}

.progress-title {
    font-weight: 600;
    font-size: 1.1rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.progress-title svg {
    width: 20px;
    height: 20px;
    fill: var(--primary-color);
}

.progress-stats {
    margin-bottom: 0.75rem;
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
}

.progress-percentage {
    font-weight: 600;
    color: var(--primary-color);
}

.progress-size {
    color: var(--text-secondary);
}

.progress-bar-container {
    width: 100%;
    height: 8px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 1rem;
}

.progress-bar {
    height: 100%;
    background-color: var(--success-color);
    width: 0%;
    transition: width 0.3s ease;
    border-radius: 4px;
}

.message {
    padding: 1rem;
    margin: 1rem 0;
    border-radius: 8px;
    display: none;
    font-size: 0.95rem;
}

.error {
    background-color: rgba(231, 76, 60, 0.2);
    color: var(--error-color);
    border: 1px solid rgba(231, 76, 60, 0.3);
}

.success {
    background-color: rgba(0, 179, 88, 0.2);
    color: var(--success-color);
    border: 1px solid rgba(0, 179, 88, 0.3);
}

.processing {
    background-color: rgba(243, 156, 18, 0.2);
    color: var(--processing-color);
    font-weight: bold;
    text-align: center;
    display: none;
    border: 1px solid rgba(243, 156, 18, 0.3);
}

.fallback-container {
    display: none;
    margin-top: 1.5rem;
    padding: 1.5rem;
    background-color: rgba(243, 156, 18, 0.1);
    border-radius: 8px;
    color: var(--warning-color);
    border: 1px solid rgba(243, 156, 18, 0.3);
}

.fallback-title {
    font-weight: 600;
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.fallback-links {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 0.5rem;
}

.fallback-link {
    background-color: var(--card-color);
    padding: 0.75rem;
    border-radius: 4px;
    text-decoration: none;
    color: var(--primary-color);
    font-size: 0.9rem;
    border: 1px solid rgba(214, 37, 24, 0.3);
    transition: background-color 0.2s;
    text-align: center;
}

.fallback-link:hover {
    background-color: rgba(214, 37, 24, 0.1);
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-icon {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s linear infinite;
    margin-right: 0.5rem;
}

@media (max-width: 600px) {
    .container {
        width: 100%;
        padding: 1.5rem;
        margin: 0;
        border-radius: 0;
        box-shadow: none;
    }
}

.queue-info {
    background-color: rgba(243, 156, 18, 0.2);
    color: var(--processing-color);
    padding: 1rem;
    margin: 1rem 0;
    border-radius: 8px;
    font-size: 0.95rem;
    border: 1px solid rgba(243, 156, 18, 0.3);
    text-align: center;
    display: none;
}