.password-input-group {
    display: flex;
    align-items: stretch;
    margin: 15px 0;
    border-radius: 6px;
    overflow: hidden;
    box-shadow: var(--shadow);
    position: relative;
    min-width: 150px;
    clear: both;
    width: fit-content;
}

#downloadPassword {
    width: calc(12ch + 30px);
    min-width: 120px;
    padding: 12px 15px;
    border: none;
    background: var(--card-bg);
    color: var(--text-color);
    font-size: 1rem;
    transition: width 0.2s ease;
    box-sizing: border-box;
}

.copy-btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 0 20px;
    cursor: pointer;
    transition: var(--transition);
    height: auto;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 0 6px 6px 0;
}

.copy-btn:hover {
    background-color: #2980b9;
}

.message {
    position: fixed;
    background: var(--primary-color);
    color: white;
    padding: 6px 12px;
    border-radius: 4px;
    font-size: 0.9rem;
    white-space: nowrap;
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 1000;
    pointer-events: none;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

@media (prefers-color-scheme: dark) {
    .message {
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
    }
}

.password-input-group {
    position: relative;
    overflow: visible;
}

.copy-btn {
    position: relative;
    z-index: 2;
}

.message.success {
    background: #27ae60;
}

.message.error {
    background: #e74c3c;
}

.message.show {
    opacity: 1;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Misa', 'Microsoft YaHei', 'PingFang SC', 'HarmonyOS Sans SC', sans-serif;
}

:root {
    --primary-color: #3498db;
    --secondary-color: #2c3e50;
    --accent-color: #e74c3c;
    --light-color: #ecf0f1;
    --dark-color: #34495e;
    --text-color: #333;
    --bg-color: #f5f7fa;
    --card-bg: #ffffff;
    --header-bg: #2c3e50;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

[data-theme="dark"] {
    --text-color: #e0e0e0;
    --bg-color: #1f2b38;
    --card-bg: #2a3849;
    --header-bg: #1f2b38;
    --secondary-color: #8ba9ce;
    --primary-color: #41a3ff;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

body {
    background: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    min-height: 100vh;
    padding-bottom: 40px;
    transition: var(--transition);
}

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

header {
    background-color: var(--header-bg);
    color: white;
    padding: 1.5rem 0;
    box-shadow: var(--shadow);
    margin-bottom: 40px;
    transition: var(--transition);
}

.header-content {
    text-align: center;
}

.title {
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: 2px;
    margin-bottom: 15px;
}

.download-card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 30px;
    box-shadow: var(--shadow);
    margin-bottom: 30px;
}

.download-card h1 {
    color: var(--primary-color);
    margin-bottom: 20px;
    font-size: 2rem;
}

.download-card h2 {
    color: var(--primary-color);
    margin: 20px 0 15px;
    font-size: 1.5rem;
}

.download-card p {
    margin-bottom: 15px;
    color: var(--text-color);
}

.download-option {
    background: var(--card-bg);
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: var(--shadow);
}

.download-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background-color: var(--primary-color);
    color: white;
    text-decoration: none;
    padding: 12px 25px;
    border-radius: 6px;
    font-weight: 600;
    transition: var(--transition);
    margin-top: 10px;
    border: none;
    cursor: pointer;
    position: relative;
}

.download-link:hover:not(:disabled) {
    background-color: #2980b9;
    transform: translateY(-2px);
}

.download-link:disabled,
.download-link.disabled {
    background-color: #95a5a6;
    cursor: not-allowed;
    transform: none !important;
}

.download-link i {
    margin-left: 8px;
    transition: opacity 0.3s;
}

.fa-spinner {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

footer {
    text-align: center;
    color: #777;
    padding-top: 30px;
    font-size: 1rem;
}

@media (max-width: 768px) {
    .title {
        font-size: 2rem;
    }
    
    .download-card h1 {
        font-size: 1.8rem;
    }
    
    .download-card h2 {
        font-size: 1.3rem;
    }
}