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

:root {
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --secondary-color: #8b5cf6;
    --success-color: #10b981;
    --error-color: #ef4444;
    --warning-color: #f59e0b;
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --border-color: #334155;
    --shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 10px 10px -5px rgba(0, 0, 0, 0.3);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 900px;
    margin: 0 auto;
}

header {
    text-align: center;
    margin-bottom: 40px;
    padding: 40px 20px;
}

header h1 {
    font-size: 3rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 10px;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
    background: var(--card-bg);
    padding: 10px;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.tab-button {
    flex: 1;
    padding: 15px 20px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    border-radius: 8px;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.tab-button .icon {
    font-size: 1.2rem;
}

.tab-button:hover {
    background: rgba(99, 102, 241, 0.1);
    color: var(--text-primary);
}

.tab-button.active {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    box-shadow: 0 4px 6px rgba(99, 102, 241, 0.3);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.card {
    background: var(--card-bg);
    border-radius: 16px;
    padding: 40px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
}

.card h2 {
    font-size: 1.8rem;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.info {
    color: var(--text-secondary);
    margin-bottom: 30px;
    font-size: 0.95rem;
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-primary);
}

.form-group textarea,
.form-group input[type="password"],
.form-group input[type="text"] {
    width: 100%;
    padding: 14px 16px;
    background: var(--bg-color);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 1rem;
    font-family: 'Courier New', monospace;
    transition: all 0.3s ease;
    resize: vertical;
}

.form-group textarea:focus,
.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.password-input {
    position: relative;
    display: flex;
    align-items: center;
}

.password-input input {
    padding-right: 50px;
}

.toggle-password {
    position: absolute;
    right: 10px;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.2rem;
    padding: 5px 10px;
    opacity: 0.6;
    transition: opacity 0.2s;
}

.toggle-password:hover {
    opacity: 1;
}

.hint {
    display: block;
    margin-top: 6px;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.btn {
    padding: 14px 28px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    justify-content: center;
}

.btn .icon {
    font-size: 1.2rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    box-shadow: 0 4px 6px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(99, 102, 241, 0.4);
}

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

.btn-secondary {
    background: var(--bg-color);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.btn-secondary:hover {
    border-color: var(--primary-color);
    background: rgba(99, 102, 241, 0.1);
}

.result {
    margin-top: 30px;
    padding-top: 30px;
    border-top: 2px solid var(--border-color);
    animation: fadeIn 0.3s ease;
}

.result h3 {
    margin-bottom: 15px;
    color: var(--success-color);
}

.output-box {
    background: var(--bg-color);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 15px;
    max-height: 300px;
    overflow-y: auto;
}

.output-box code,
.output-box pre {
    color: var(--text-primary);
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    word-break: break-all;
    white-space: pre-wrap;
}

.security-note {
    display: block;
    margin-top: 15px;
    padding: 12px;
    background: rgba(245, 158, 11, 0.1);
    border-left: 4px solid var(--warning-color);
    color: var(--warning-color);
    border-radius: 4px;
    font-size: 0.9rem;
}

footer {
    margin-top: 60px;
    padding-top: 40px;
    border-top: 1px solid var(--border-color);
}

.security-features {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 12px;
    margin-bottom: 20px;
    border: 1px solid var(--border-color);
}

.security-features h3 {
    margin-bottom: 15px;
    color: var(--primary-color);
}

.security-features ul {
    list-style: none;
}

.security-features li {
    padding: 10px 0;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
}

.security-features li:last-child {
    border-bottom: none;
}

.security-features strong {
    color: var(--text-primary);
}

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

.toast {
    position: fixed;
    bottom: 30px;
    right: 30px;
    padding: 16px 24px;
    border-radius: 8px;
    color: white;
    font-weight: 600;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
    transform: translateY(100px);
    opacity: 0;
    transition: all 0.3s ease;
    z-index: 1000;
    max-width: 400px;
}

.toast.show {
    transform: translateY(0);
    opacity: 1;
}

.toast.success {
    background: var(--success-color);
}

.toast.error {
    background: var(--error-color);
}

.toast.info {
    background: var(--primary-color);
}

@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }

    .card {
        padding: 25px;
    }

    .tabs {
        flex-direction: column;
    }

    .toast {
        left: 20px;
        right: 20px;
        bottom: 20px;
    }
}

@media (max-width: 480px) {
    body {
        padding: 10px;
    }

    header {
        padding: 20px 10px;
    }

    .card {
        padding: 20px;
    }
}

::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-color);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-color);
}