:root {
    --primary-color: #477495;
    --primary-dark: #232b5d;
    --secondary-color: #92ABB1;
    --accent-color: #CC6058;
    --text-primary: #51395B;
    --text-secondary: #92ABB1;
    /* Social Colors */
    --google-color: #ea4335;
    --github-color: #333;
    --facebook-color: #1877f2;
    --bg-white: #fff;
}

* {
    margin: 0;
    padding: 0;

}

body {
    font-family: 'Inter', sans-serif;
    background: linear-gradient(135deg, #63A3B4 0%, #477495 100%);
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.login-wrapper {
    width: 100%;
    max-width: 480px;
    background: #fafdff;
    padding: 50px 40px;
    border-radius: 25px;
    box-shadow: 0 12px 50px rgba(71, 116, 149, 0.10);
    text-align: center;
    border: 1px solid #92ABB1;
}

/* Logo Circle với animation */
.logo-circle {
    width: 90px;
    height: 90px;
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 0 auto 25px;
    box-shadow: 0 4px 20px rgba(76, 163, 180, 0.18);
}

.logo-circle i {
    font-size: 36px;
    color: white;
}

/* Bounce animation */
.animated-logo {
    animation: bounceUpDown 2.5s infinite ease-in-out;
}

@keyframes bounceUpDown {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

/* Heading & Subtext */
.login-box h2 {
    color: var(--primary-color);
    font-weight: 700;
    margin-bottom: 10px;
    font-size: 24px;
    background: linear-gradient(135deg, #477495 0%, #8B4263 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.login-box p {
    color: var(--text-secondary);
    font-size: 15px;
    margin-bottom: 30px;
}

/* OAuth Buttons */
.oauth-buttons {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.btn-oauth {
    /*display: flex;*/
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 20px 100px;
    border-radius: 12px;
    font-weight: 500;
    font-size: 15px;
    border: 1px solid;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    background: #fafdff;
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-oauth i {
    font-size: 20px;
}

/* Google */
.btn-google {
    width: 90%;
    color: var(--google-color);
    border-color: var(--google-color);
    background: var(--bg-white);
}
.btn-google:hover {
    background: var(--google-color);
    color: var(--bg-white);
}

/* GitHub */
.btn-github {
    width: 90%;
    color: var(--github-color);
    border-color: var(--github-color);
    background: var(--bg-white);
}
.btn-github:hover {
    background: var(--github-color);
    color: var(--bg-white);
}

/* Facebook */
.btn-facebook {
    width: 90%;
    color: var(--facebook-color);
    border-color: var(--facebook-color);
    background: var(--bg-white);
}
.btn-facebook:hover {
    background: var(--facebook-color);
    color: var(--bg-white);
}

/* Disabled buttons */
.btn-oauth:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    background: #f5f5f5;
    color: #999;
    border-color: #ddd;
}
.btn-oauth:disabled:hover {
    background: #f5f5f5;
    color: #999;
    border-color: #ddd;
}

/* Responsive */
@media (max-width: 480px) {
    .login-wrapper {
        padding: 30px 20px;
    }

    .btn-oauth {
        font-size: 14px;
        padding: 12px;
    }

    .logo-circle {
        width: 70px;
        height: 70px;
    }
}