body {
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

.container {
    max-width: 900px;
    width: 95%;
    background: rgba(255, 255, 255, 0.95);
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 15px 35px rgba(0,0,0,0.2);
    backdrop-filter: blur(10px);
    position: relative;
    margin: 20px auto;
    overflow-y: auto;
    max-height: calc(100vh - 40px);
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.container::-webkit-scrollbar {
    display: none;
}

h1 {
    color: #2c3e50;
    text-align: center;
    margin-bottom: 30px;
    font-weight: 700;
    font-size: 32px;
    position: relative;
    padding-bottom: 15px;
}

h1::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 2px;
}

.key-list {
    margin-bottom: 30px;
    background: rgba(248, 249, 250, 0.9);
    padding: 25px;
    border-radius: 15px;
    transition: all 0.3s ease;
    border: 1px solid rgba(0,0,0,0.1);
    animation: fadeIn 0.5s ease forwards;
}

.key-list:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

.key-list:nth-child(2) {
    animation-delay: 0.2s;
}

.key-list h2 {
    color: #2c3e50;
    margin-bottom: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1.5em;
    padding-bottom: 10px;
    border-bottom: 2px solid rgba(0,0,0,0.1);
    cursor: pointer;
}

.key-list h2 .toggle-icon {
    margin-right: 10px;
    transition: transform 0.3s ease;
}

.key-list h2 .toggle-icon.collapsed {
    transform: rotate(-90deg);
}

.key-list .key-content {
    transition: all 0.3s ease-out;
    overflow: hidden;
    height: auto;
    opacity: 1;
}

.key-list .key-content.collapsed {
    height: 0;
    opacity: 0;
    padding-top: 0;
    padding-bottom: 0;
}

ul {
    list-style-type: none;
    padding: 0;
    margin: 0;
}

li {
    background: white;
    border: 1px solid rgba(0,0,0,0.1);
    margin-bottom: 12px;
    padding: 15px;
    border-radius: 10px;
    transition: all 0.3s ease;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}

li:hover {
    transform: translateX(5px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.key-info {
    display: flex;
    align-items: center;
    gap: 15px;
    flex: 1;
}

.key-text {
    font-family: 'Roboto Mono', monospace;
    color: #2c3e50;
}

.fail-count {
    background: rgba(231, 76, 60, 0.1);
    color: #e74c3c;
    padding: 4px 10px;
    border-radius: 15px;
    font-size: 0.85em;
    display: flex;
    align-items: center;
    gap: 5px;
}

.fail-count i {
    font-size: 12px;
}

.key-actions {
    display: flex;
    gap: 10px;
    align-items: center;
}

.verify-btn, .copy-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 8px 15px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: bold;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 5px;
}

.verify-btn {
    background: linear-gradient(135deg, #2ecc71, #27ae60);
}

.verify-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(46, 204, 113, 0.3);
}

.verify-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.verify-btn i {
    font-size: 14px;
}

.copy-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(118, 75, 162, 0.3);
}

.copy-btn:active {
    transform: translateY(0);
}

.copy-btn i {
    font-size: 14px;
}

.total {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 15px 25px;
    border-radius: 10px;
    font-weight: bold;
    text-align: center;
    font-size: 1.2em;
    margin-top: 30px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

#copyStatus {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    padding: 15px 30px;
    border-radius: 25px;
    font-weight: bold;
    opacity: 0;
    transition: all 0.3s ease;
    backdrop-filter: blur(5px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
    z-index: 1000;
    text-align: center;
    min-width: 200px;
    color: white;
}

#copyStatus.success {
    background: rgba(39, 174, 96, 0.95);
}

#copyStatus.error {
    background: rgba(231, 76, 60, 0.95);
}

.status-badge {
    padding: 4px 12px;
    border-radius: 15px;
    font-size: 0.9em;
    font-weight: bold;
    margin-right: 10px;
}

.status-valid {
    background: rgba(39, 174, 96, 0.1);
    color: #27ae60;
}

.status-invalid {
    background: rgba(231, 76, 60, 0.1);
    color: #e74c3c;
}

.scroll-buttons {
    position: fixed;
    right: 20px;
    bottom: 20px;
    display: none;
    flex-direction: column;
    gap: 10px;
    z-index: 1000;
}

.scroll-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    width: 40px;
    height: 40px;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    transition: all 0.3s ease;
    backdrop-filter: blur(5px);
    box-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.scroll-btn:hover {
    background: linear-gradient(135deg, #764ba2 0%, #667eea 100%);
    transform: scale(1.1);
}

.scroll-btn:active {
    transform: scale(0.95);
}

.refresh-btn {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    border: none;
    padding: 10px 20px;
    border-radius: 25px;
    cursor: pointer;
    font-size: 14px;
    font-weight: bold;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.refresh-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 20px rgba(118, 75, 162, 0.3);
    background: linear-gradient(135deg, #764ba2 0%, #667eea 100%);
}

.refresh-btn:active {
    transform: scale(0.95);
}

.refresh-btn i {
    transition: transform 0.5s ease;
}

.refresh-btn.loading i {
    animation: spin 1s linear infinite;
}

.copyright {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.9);
    padding: 10px 0;
    text-align: center;
    font-size: 14px;
    color: #2c3e50;
    backdrop-filter: blur(5px);
    border-top: 1px solid rgba(0,0,0,0.1);
}

.copyright a {
    color: #764ba2;
    text-decoration: none;
    transition: color 0.3s ease;
}

.copyright a:hover {
    color: #667eea;
}

.copyright img {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    vertical-align: middle;
    margin-right: 5px;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

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

@media (max-width: 768px) {
    .container {
        width: 100%;
        padding: 20px;
        margin: 10px auto;
    }
    body {
        padding: 10px;
    }
    h1 {
        font-size: 24px;
    }
    .key-list h2 {
        font-size: 1.2em;
        flex-direction: column;
        gap: 10px;
        align-items: flex-start;
    }
    .key-info {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }
    li {
        flex-direction: column;
        gap: 10px;
    }
    .key-actions {
        width: 100%;
        flex-direction: column;
    }

    .verify-btn, .copy-btn {
        width: 100%;
        justify-content: center;
    }
    .key-text {
        word-break: break-all;
    }
    .scroll-buttons {
        right: 10px;
        bottom: 10px;
    }
    .scroll-btn {
        width: 35px;
        height: 35px;
        font-size: 16px;
    }
    .refresh-btn {
        top: 10px;
        right: 10px;
        padding: 8px 16px;
        font-size: 12px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 15px;
    }
    h1 {
        font-size: 20px;
    }
    .key-list {
        padding: 15px;
    }
    .status-badge {
        padding: 3px 8px;
        font-size: 0.8em;
    }
    .fail-count {
        font-size: 0.8em;
    }
    .total {
        font-size: 1em;
        padding: 12px 20px;
    }
}