:root {
    --bg-color: #121212;
    --card-bg: #1e1e1e;
    --text-primary: #ffffff;
    --text-secondary: #b3b3b3;
    --accent-color: #f0a500; /* Gold/Gear color */
    --accent-hover: #d18f00;
    --button-text: #121212;
    --success-color: #4caf50;
}

body {
    margin: 0;
    padding: 0;
    font-family: 'Noto Sans SC', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    display: flex;
    justify-content: center;
    min-height: 100vh;
}

.container {
    width: 100%;
    max-width: 600px;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

header {
    text-align: center;
    margin-bottom: 1rem;
}

header h1 {
    font-size: 2.5rem;
    margin: 0;
    color: var(--accent-color);
    text-transform: uppercase;
    letter-spacing: 2px;
}

header .subtitle {
    color: var(--text-secondary);
    margin-top: 0.5rem;
    font-size: 1.2rem;
}

.card {
    background-color: var(--card-bg);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
    border: 1px solid #333;
}

h2 {
    margin-top: 0;
    margin-bottom: 1rem;
    font-size: 1.25rem;
    border-bottom: 2px solid var(--accent-color);
    padding-bottom: 0.5rem;
    display: inline-block;
}

.address-box {
    background-color: #2a2a2a;
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    cursor: pointer;
    transition: background-color 0.2s;
    display: flex;
    flex-direction: column;
    position: relative;
}

.address-box:hover {
    background-color: #333;
}

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

.address-box .label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
}

.address-box code {
    font-family: 'Consolas', monospace;
    font-size: 1.1rem;
    color: var(--accent-color);
}

.address-box .copy-hint {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: 0.8rem;
    color: var(--text-secondary);
    opacity: 0.6;
}

.download-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid #333;
}

.download-item:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.download-item .info h3 {
    margin: 0;
    font-size: 1.1rem;
}

.download-item .info p {
    margin: 0.25rem 0 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

button, .button {
    background-color: var(--accent-color);
    color: var(--button-text);
    border: none;
    padding: 0.6rem 1.2rem;
    border-radius: 6px;
    font-weight: bold;
    cursor: pointer;
    text-decoration: none;
    font-size: 0.95rem;
    transition: transform 0.1s, background-color 0.2s;
    display: inline-block;
    text-align: center;
}

button:hover, .button:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
}

button:active, .button:active {
    transform: translateY(0);
}

footer {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.8rem;
    margin-top: auto;
}

/* Toast Notification */
.toast {
    visibility: hidden;
    min-width: 200px;
    background-color: var(--success-color);
    color: #fff;
    text-align: center;
    border-radius: 4px;
    padding: 12px;
    position: fixed;
    z-index: 1;
    left: 50%;
    bottom: 30px;
    transform: translateX(-50%);
    font-size: 1rem;
    box-shadow: 0 4px 8px rgba(0,0,0,0.3);
}

.toast.show {
    visibility: visible;
    animation: fadein 0.5s, fadeout 0.5s 2.5s;
}

@keyframes fadein {
    from {bottom: 0; opacity: 0;}
    to {bottom: 30px; opacity: 1;}
}

@keyframes fadeout {
    from {bottom: 30px; opacity: 1;}
    to {bottom: 0; opacity: 0;}
}

@media (max-width: 480px) {
    .container {
        padding: 1rem;
    }
    
    .download-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .download-item button, .download-item .button {
        width: 100%;
        box-sizing: border-box;
    }
}