:root {
    --color-text-light: #fafafe;
    --color-text-dark: #2d2e37;
    --color-primary: #1e40af;
    --color-background: radial-gradient(circle at center, #0a0f35, #000517);
    --color-error: red;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background: var(--color-background);
}

.container {
    background: white;
    padding: 40px;
    border-radius: 16px;
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4);
    width: 400px;
    text-align: center;
    transition: 0.3s ease-in-out;
}

.container:hover {
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.5);
}

.container h2 {
    margin-bottom: 25px;
    font-size: 28px;
    font-weight: 600;
    color: var(--color-text-dark);
}

.input-group {
    margin-bottom: 20px;
    text-align: left;
}

.input-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
    color: var(--color-text-dark);
}

.input-group input {
    width: 100%;
    padding: 14px;
    border: 2px solid #ccc;
    border-radius: 10px;
    font-size: 17px;
    background: #f7f9fc;
    transition: border 0.3s, box-shadow 0.3s;
}

.input-group input:focus {
    border-color: var(--color-primary);
    outline: none;
    box-shadow: 0 0 10px rgba(30, 64, 175, 0.5);
}

.error-message {
    display: none;
    color: var(--color-error);
    font-size: 15px;
    margin-top: 6px;
}

.action-buttons {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-top: 25px;
}

.btn {
    width: 100%;
    padding: 15px;
    border: none;
    border-radius: 10px;
    background: var(--color-primary);
    color: white;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    transition: 0.3s;
}

.btn:hover {
    background: #15307d;
    transform: translateY(-2px);
}

.lock-icon {
    font-size: 40px;
    color: var(--color-primary);
    margin-bottom: 15px;
}