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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-image: url('background_developer_center.png');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    background-repeat: no-repeat;
    min-height: 100vh;
}

.background-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: -1;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
}

header {
    text-align: center;
    margin-bottom: 50px;
    background: rgba(255, 255, 255, 0.95);
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

header h1 {
    font-size: 2.5em;
    color: #e30613;
    margin-bottom: 10px;
    font-weight: 700;
}

.subtitle {
    font-size: 1.2em;
    color: #555;
    font-weight: 300;
}

main {
    background: rgba(255, 255, 255, 0.97);
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.intro {
    font-size: 1.1em;
    margin-bottom: 40px;
    padding: 20px;
    background: #f8f8f8;
    border-left: 4px solid #e30613;
    border-radius: 5px;
}

.recovery-option {
    margin-bottom: 50px;
}

.recovery-option h2 {
    font-size: 2em;
    color: #e30613;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 3px solid #e30613;
}

.recovery-option > p {
    font-size: 1.05em;
    margin-bottom: 20px;
    color: #444;
}

.step-box {
    background: #fff3cd;
    border: 1px solid #ffc107;
    border-radius: 5px;
    padding: 20px;
    margin: 20px 0;
}

.step-box p {
    margin-bottom: 10px;
}

.step-box p:last-child {
    margin-bottom: 0;
}

.warning-box {
    background: #fff3cd;
    border: 2px solid #ff6b6b;
    border-left: 6px solid #e30613;
    border-radius: 5px;
    padding: 20px;
    margin: 20px 0;
}

.warning-box h4 {
    color: #e30613;
    font-size: 1.2em;
    margin-bottom: 15px;
    font-weight: 700;
}

.warning-box ul {
    margin-left: 0;
    list-style: none;
}

.warning-box ul li {
    margin-bottom: 10px;
    padding-left: 20px;
    position: relative;
}

.warning-box ul li:before {
    content: "•";
    color: #e30613;
    font-weight: bold;
    position: absolute;
    left: 0;
}

.sub-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.option-card {
    background: linear-gradient(135deg, #f5f5f5 0%, #e8e8e8 100%);
    border: 2px solid #ddd;
    border-radius: 8px;
    padding: 25px;
    transition: transform 0.2s, box-shadow 0.2s;
}

.option-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 16px rgba(227, 6, 19, 0.2);
    border-color: #e30613;
}

.option-card h3 {
    color: #e30613;
    font-size: 1.5em;
    margin-bottom: 15px;
}

.sub-section {
    margin: 30px 0;
    padding: 25px;
    background: #f9f9f9;
    border-radius: 8px;
    border: 1px solid #ddd;
}

.sub-section h3 {
    color: #333;
    font-size: 1.6em;
    margin-bottom: 15px;
}

.requirements-box,
.instructions-box {
    background: white;
    padding: 20px;
    border-radius: 5px;
    margin-top: 15px;
    border-left: 4px solid #e30613;
}

.requirements-box h4,
.instructions-box h4 {
    color: #e30613;
    font-size: 1.2em;
    margin-bottom: 15px;
}

ol, ul {
    margin-left: 25px;
    margin-top: 10px;
}

ol li, ul li {
    margin-bottom: 12px;
    line-height: 1.8;
}

.screenshot {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    margin: 15px auto;
    display: block;
    border: 2px solid #ddd;
}

kbd {
    background-color: #333;
    color: white;
    padding: 3px 8px;
    border-radius: 3px;
    font-family: monospace;
    font-size: 0.9em;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.url-box {
    background: #f4f4f4;
    padding: 15px;
    border-radius: 5px;
    margin: 10px 0;
    border: 1px solid #ddd;
    overflow-x: auto;
    display: flex;
    align-items: center;
    gap: 15px;
    flex-wrap: wrap;
}

.url-box code {
    color: #e30613;
    font-family: 'Courier New', monospace;
    font-size: 0.95em;
    word-break: break-all;
    flex: 1;
    min-width: 200px;
}

.copy-btn {
    background: #e30613;
    color: white;
    border: none;
    padding: 8px 20px;
    border-radius: 5px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.95em;
    transition: all 0.3s ease;
    white-space: nowrap;
    box-shadow: 0 2px 4px rgba(227, 6, 19, 0.3);
}

.copy-btn:hover {
    background: #b30510;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(227, 6, 19, 0.4);
}

.copy-btn:active {
    transform: translateY(0);
    box-shadow: 0 1px 2px rgba(227, 6, 19, 0.3);
}

.copy-btn.copied {
    background: #28a745;
    animation: pulse 0.3s ease;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

a {
    color: #e30613;
    text-decoration: none;
    font-weight: 600;
    transition: color 0.2s;
}

a:hover {
    color: #b30510;
    text-decoration: underline;
}

strong {
    color: #222;
    font-weight: 800;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    border: 1px solid #e30613;
}

table th,
table td {
    border: 1px solid #e30613;
    padding: 14px 28px;
    text-align: left;
    vertical-align: top;
}

table th {
    background: #e30613;
    color: #fff;
    font-weight: 600;
}

table td:first-child {
    white-space: nowrap;
    font-weight: 600;
    color: #222;
}

table tr:nth-child(even) td {
    background: #faf2f2;
}

footer {
    text-align: center;
    margin-top: 50px;
    padding: 20px;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 10px;
    color: #666;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

@media (max-width: 768px) {
    header h1 {
        font-size: 1.8em;
    }

    .subtitle {
        font-size: 1em;
    }

    .recovery-option h2 {
        font-size: 1.5em;
    }

    main {
        padding: 20px;
    }

    .sub-options {
        grid-template-columns: 1fr;
    }
}