:root {
    --bg-color: #0f0c29;
    --bg-gradient: linear-gradient(to right, #24243e, #302b63, #0f0c29);
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --primary-color: #a770ef;
    --secondary-color: #cf8bf3;
    --accent-color: #fdb99b;
    --text-color: #ffffff;
    --text-muted: #b3b3b3;
    --success-color: #00b894;
    --warning-color: #fdcb6e;
    --danger-color: #d63031;
}

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

body {
    background: var(--bg-gradient);
    color: var(--text-color);
    font-family: 'Outfit', sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    overflow: hidden;
}

.container {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    padding: 2rem;
    width: 90%;
    max-width: 450px;
    border-radius: 16px;
    transition: transform 0.3s ease;
}

.container:hover {
    transform: translateY(-5px);
}

header {
    text-align: center;
    margin-bottom: 1.5rem;
}

header h1 {
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
    background: linear-gradient(to right, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

header p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.result-container {
    background: rgba(0, 0, 0, 0.3);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    position: relative;
    border: 1px solid var(--glass-border);
}

.result-container span {
    word-break: break-all;
    font-family: 'Courier New', Courier, monospace;
    font-size: 1.2rem;
    letter-spacing: 1px;
}

.btn {
    border: none;
    background: none;
    color: var(--text-color);
    font-size: 1.2rem;
    cursor: pointer;
    transition: color 0.2s ease, transform 0.1s ease;
}

.btn:hover {
    color: var(--accent-color);
}

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

.btn-large {
    display: block;
    width: 100%;
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    color: #fff;
    padding: 1rem;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 600;
    margin-top: 1.5rem;
    box-shadow: 0 4px 15px rgba(167, 112, 239, 0.4);
}

.btn-large:hover {
    opacity: 0.9;
    box-shadow: 0 6px 20px rgba(167, 112, 239, 0.6);
}

.settings {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.setting {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.setting label {
    color: var(--text-muted);
    font-size: 0.95rem;
}

.length-control {
    display: flex;
    align-items: center;
    gap: 10px;
}

input[type="number"] {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--glass-border);
    color: var(--text-color);
    padding: 5px;
    border-radius: 4px;
    width: 50px;
    text-align: center;
    font-family: 'Outfit', sans-serif;
}

input[type="range"] {
    -webkit-appearance: none;
    width: 100px;
    height: 6px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 5px;
    outline: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent-color);
    cursor: pointer;
    transition: background .15s ease-in-out;
}

input[type="range"]::-moz-range-thumb {
    width: 16px;
    height: 16px;
    border: 0;
    border-radius: 50%;
    background: var(--accent-color);
    cursor: pointer;
    transition: background .15s ease-in-out;
}

input[type="checkbox"] {
    appearance: none;
    background-color: rgba(0, 0, 0, 0.3);
    margin: 0;
    font: inherit;
    color: var(--accent-color);
    width: 1.15em;
    height: 1.15em;
    border: 1px solid var(--glass-border);
    border-radius: 0.15em;
    display: grid;
    place-content: center;
    cursor: pointer;
}

input[type="checkbox"]::before {
    content: "";
    width: 0.65em;
    height: 0.65em;
    transform: scale(0);
    transition: 120ms transform ease-in-out;
    box-shadow: inset 1em 1em var(--accent-color);
    transform-origin: center;
    clip-path: polygon(14% 44%, 0 65%, 50% 100%, 100% 16%, 80% 0%, 43% 62%);
}

input[type="checkbox"]:checked::before {
    transform: scale(1);
}

.strength-container {
    margin-top: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.strength-bar {
    height: 6px;
    width: 100%;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
    position: relative;
    overflow: hidden;
}

.strength-bar::after {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 0%;
    background: var(--danger-color);
    transition: width 0.3s ease, background 0.3s ease;
}

.strength-bar.weak::after {
    width: 33%;
    background: var(--danger-color);
}

.strength-bar.medium::after {
    width: 66%;
    background: var(--warning-color);
}

.strength-bar.strong::after {
    width: 100%;
    background: var(--success-color);
}

#strength-text {
    font-size: 0.8rem;
    text-align: right;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

@media (max-width: 500px) {
    .container {
        width: 95%;
        padding: 1.5rem;
    }
}