:root {
    --primary: #4361ee;
    --success: #4cc9f0;
    --danger: #f72585;
    --warning: #f8961e;
    --dark: #212529;
    --light: #f8f9fa;
    --gray: #6c757d;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.container {
    background-color: white;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 500px;
    padding: 30px;
    transition: all 0.3s ease;
}

.container:hover {
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
}

h1 {
    color: var(--dark);
    text-align: center;
    margin-bottom: 25px;
    font-weight: 700;
    font-size: 28px;
}

.logo {
    text-align: center;
    margin-bottom: 20px;
}

.logo i {
    font-size: 50px;
    color: var(--primary);
}

.form-group {
    margin-bottom: 20px;
    position: relative;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--dark);
    font-weight: 500;
}

.input-wrapper {
    position: relative;
}

.form-control {
    width: 100%;
    padding: 12px 15px 12px 40px;
    border: 2px solid #e9ecef;
    border-radius: 8px;
    font-size: 16px;
    transition: all 0.3s;
    outline: none;
}

.form-control:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.2);
}

.input-icon {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray);
}

.toggle-password {
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--gray);
    cursor: pointer;
    font-size: 18px;
}

.strength-meter {
    height: 8px;
    background-color: #e9ecef;
    border-radius: 5px;
    margin-top: 15px;
    overflow: hidden;
    margin-bottom: 5px;
}

.strength-bar {
    height: 100%;
    width: 0%;
    transition: all 0.3s;
}

.strength-text {
    text-align: right;
    font-size: 12px;
    color: var(--gray);
    font-weight: 500;
    margin-bottom: 15px;
}

.requirements {
    margin-top: 25px;
}

.requirements h3 {
    font-size: 16px;
    color: var(--dark);
    margin-bottom: 10px;
}

.requirement-item {
    display: flex;
    align-items: center;
    margin-bottom: 8px;
    color: var(--gray);
    font-size: 14px;
}

.requirement-item i {
    margin-right: 8px;
    font-size: 12px;
}

.valid {
    color: var(--success);
}

.invalid {
    color: var(--danger);
}

.feedback {
    padding: 12px;
    border-radius: 8px;
    margin-top: 20px;
    display: none;
    align-items: center;
}

.feedback i {
    margin-right: 10px;
    font-size: 20px;
}

.success-feedback {
    background-color: rgba(76, 201, 240, 0.1);
    color: var(--success);
    display: flex;
}

.error-feedback {
    background-color: rgba(247, 37, 133, 0.1);
    color: var(--danger);
    display: flex;
}

.generate-btn {
    background: none;
    border: none;
    color: var(--primary);
    font-weight: 500;
    cursor: pointer;
    margin-top: 5px;
    font-size: 14px;
    display: inline-flex;
    align-items: center;
}

.generate-btn i {
    margin-right: 5px;
}

.copy-btn {
    background: none;
    border: none;
    color: var(--primary);
    cursor: pointer;
    position: absolute;
    right: 45px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 18px;
}

.tooltip {
    position: absolute;
    background-color: var(--dark);
    color: white;
    padding: 5px 10px;
    border-radius: 5px;
    font-size: 12px;
    top: -35px;
    left: 50%;
    transform: translateX(-50%);
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
    white-space: nowrap;
}

.copy-btn:hover .tooltip {
    opacity: 1;
}

.time-to-crack {
    margin-top: 20px;
    padding: 12px;
    border-radius: 8px;
    background-color: rgba(248, 150, 30, 0.1);
    color: var(--warning);
    display: flex;
    align-items: center;
}

.time-to-crack i {
    margin-right: 10px;
    font-size: 20px;
}

@media (max-width: 576px) {
    .container {
        padding: 20px;
    }

    h1 {
        font-size: 24px;
    }
}