:root{
    --accent: cyan;
    --bg-dark: rgb(8, 8, 8);
    --card-bg: rgb(22, 22, 22);
    --text: #e0e0e0;
    --border: var(--accent);
}

*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
    color: var(--text);
}

body{
    background-color: var(--bg-dark);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

form{
    display: flex;
    flex-direction: column;
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 15px;
    padding: 30px 25px;
    width: 100%;
    max-width: 380px;
}

h1{
    text-align: center;
    margin-bottom: 20px;
    color: var(--accent);
    font-weight: 700;
    font-size: 1.8rem;
}

label{
    margin-top: 16px;
    margin-bottom: 6px;
    font-size: 0.95rem;
    font-weight: 500;
    display: block;
}

.input{
    padding: 12px 14px;
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(0, 255, 255, 0.3);
    border-radius: 10px;
    color: white;
    font-size: 1rem;
    outline: none;
}

.input:focus{
    border-color: var(--accent);
}

.input::placeholder{
    color: rgba(255, 255, 255, 0.4);
}

.checkbox-container{
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 16px;
    font-size: 0.9rem;
    line-height: 1.4;
}

.checkbox-container input[type="checkbox"]{
    accent-color: var(--accent);
    width: 18px;
    height: 18px;
    margin: 0;
    flex-shrink: 0;
}

.checkbox-container a{
    color: var(--accent);
    text-decoration: underline;
}

button{
    margin-top: 24px;
    padding: 14px;
    background-color: black;
    color: var(--accent);
    border: 1px solid var(--accent);
    border-radius: 10px;
    font-weight: 600;
    font-size: 1.1rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

button:hover{
    background-color: var(--accent);
    color: black;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 255, 255, 0.3);
}

button:active{
    transform: translateY(0);
    box-shadow: 0 2px 6px rgba(0, 255, 255, 0.2);
}

p{
    text-align: center;
    margin-top: 2vh;
}

.error{
    color: #ff6b6b;
    font-size: 0.85rem;
    margin-top: 6px;
    min-height: 20px;
    opacity: 0;
    transition: opacity 0.2s ease;
}

.error.active{
    opacity: 1;
}

.input.invalid,
.checkbox.invalid{
    border-color: #ff6b6b !important;
    box-shadow: 0 0 8px rgba(255, 107, 107, 0.3);
}

button:disabled{
    opacity: 0.7;
    cursor: not-allowed;
    transform: none !important;
}

@media (max-width: 480px){
    form{
        padding: 25px 20px;
    }

    h1{
        font-size: 1.6rem;
    }
}