@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

:root {
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --bg-gradient: linear-gradient(135deg, #0f0c29 0%, #302b63 50%, #24243e 100%);
    --card-bg: rgba(255, 255, 255, 0.05);
    --card-border: rgba(255, 255, 255, 0.1);
    --text-primary: #ffffff;
    --text-secondary: #b8b9c9;
    --accent-purple: #667eea;
    --accent-green: #00b09b;

    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;

    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;

    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.3);
    --transition: 0.3s ease;
    --transition-fast: 0.2s ease;
}

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

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg-gradient);
    background-attachment: fixed;
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    scrollbar-width: thin;
    scrollbar-color: #667eea #0f0c29;
}

body::-webkit-scrollbar,
html::-webkit-scrollbar {
    display: block !important;
    width: 8px;
}

body::-webkit-scrollbar-track,
html::-webkit-scrollbar-track {
    background: #0f0c29;
}

body::-webkit-scrollbar-thumb,
html::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 4px;
}

body::-webkit-scrollbar-thumb:hover,
html::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, #764ba2 0%, #667eea 100%);
}

.nav-container {
    padding: var(--spacing-lg) 0;
    border-bottom: 1px solid var(--card-border);
    background: rgba(15, 12, 41, 0.8);
    backdrop-filter: blur(10px);
}

nav {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
}

.language-selector {
    justify-self: start;
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.05);
    padding: 4px 12px;
    border-radius: 20px;
    border: 1px solid var(--card-border);
}

.lang-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    padding: 2px 4px;
    transition: var(--transition-fast);
}

.lang-btn:hover {
    color: var(--text-primary);
}

.lang-btn.active {
    color: var(--accent-purple);
    text-shadow: 0 0 10px rgba(102, 126, 234, 0.4);
}

.lang-divider {
    color: var(--card-border);
    font-size: 0.8rem;
}

.logo {
    justify-self: center;
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    cursor: pointer;
    text-decoration: none;
    letter-spacing: -0.5px;
    transition: var(--transition);
}

.logo:hover {
    transform: scale(1.25);
}

.back-link {
    justify-self: end;
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.back-link:hover {
    color: var(--text-primary);
}

main.container {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-lg);
    flex: 1;
    width: 100%;
}

.header-section {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.icon-wrapper {
    display: inline-flex;
    background: rgba(255, 255, 255, 0.1);
    width: 60px;
    height: 60px;
    border-radius: 50%;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
    box-shadow: 0 0 20px rgba(102, 126, 234, 0.3);
}

.header-icon {
    font-size: 2rem;
}

h1 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-sm);
    background: linear-gradient(135deg, #fff 0%, #b8b9c9 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

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

.tool-card {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
}


.tabs {
    display: flex;
    background: rgba(0, 0, 0, 0.2);
    padding: 6px;
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-lg);
}

.tab-btn {
    flex: 1;
    background: none;
    border: none;
    color: var(--text-secondary);
    padding: 10px;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
}

.tab-btn:hover {
    color: var(--text-primary);
}

.tab-btn.active {
    background: var(--card-bg);
    color: var(--text-primary);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}


.controls-section {
    margin-bottom: var(--spacing-xl);
}

.control-group {
    margin-bottom: var(--spacing-lg);
}

.label-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
}

#lengthVal {
    font-weight: 700;
    color: var(--accent-purple);
    font-size: 1.1rem;
}

.slider {
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: rgba(255, 255, 255, 0.1);
    outline: none;
    transition: var(--transition);
}

.slider::-webkit-slider-thumb {
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--accent-purple);
    cursor: pointer;
    box-shadow: 0 0 10px rgba(102, 126, 234, 0.5);
    transition: var(--transition);
}

.slider::-webkit-slider-thumb:hover {
    transform: scale(1.1);
}

.options-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.toggle-wrapper {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-secondary);
}


.switch {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 24px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider-round {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(255, 255, 255, 0.1);
    transition: .4s;
    border-radius: 24px;
}

.slider-round:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
}

input:checked+.slider-round {
    background-color: var(--accent-purple);
}

input:checked+.slider-round:before {
    transform: translateX(20px);
}


.output-group {
    background: rgba(0, 0, 0, 0.3);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--card-border);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.input-wrapper {
    display: flex;
    gap: var(--spacing-md);
}

#passwordOutput {
    flex: 1;
    background: none;
    border: none;
    color: var(--accent-green);
    font-size: 1.25rem;
    font-family: 'Inter', monospace;
    font-weight: 600;
    outline: none;
    letter-spacing: 1px;
    min-width: 0;
    width: 100%;
}

#refreshBtn {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    transition: var(--transition);
}

#refreshBtn:hover {
    transform: rotate(180deg);
}

#copyBtn {
    width: 100%;
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border: none;
    background: var(--primary-gradient);
    color: white;
    font-weight: 600;
    cursor: pointer;
    font-size: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
    transition: var(--transition);
}

#copyBtn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.6);
}

.info-card {
    margin-top: var(--spacing-xl);
    background: rgba(102, 126, 234, 0.05);
    border-left: 4px solid var(--accent-purple);
    padding: var(--spacing-lg);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.info-card h3 {
    margin-bottom: var(--spacing-md);
}

.info-card ul {
    padding-left: var(--spacing-lg);
    color: var(--text-secondary);
}

.info-card li {
    margin-bottom: var(--spacing-sm);
}

footer {
    text-align: center;
    padding: var(--spacing-lg);
    color: var(--text-secondary);
    border-top: 1px solid var(--card-border);
    margin-top: auto;
}

@media (max-width: 600px) {
    .options-grid {
        grid-template-columns: 1fr;
    }

    .nav-container {
        padding: var(--spacing-md);
    }

    h1 {
        font-size: 2rem;
    }
}