@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700;800&display=swap');

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

html, body {
    height: 100%;
    font-family: 'Poppins', sans-serif;
}

body {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    overflow: hidden;
}

body::before {
    content: '';
    position: absolute;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1), transparent);
    top: -200px;
    right: -200px;
    border-radius: 50%;
    animation: float 6s ease-in-out infinite;
}

body::after {
    content: '';
    position: absolute;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1), transparent);
    bottom: -150px;
    left: -150px;
    border-radius: 50%;
    animation: float 8s ease-in-out infinite;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    50% {
        transform: translateY(-20px) rotate(5deg);
    }
}

.login-container {
    position: relative;
    z-index: 1;
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.login-box {
    width: 100%;
    max-width: 450px;
    padding: 50px 40px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 25px 45px rgba(0, 0, 0, 0.3);
    border-radius: 20px;
    animation: slideUp 0.8s ease;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.icon-container i {
    font-size: 4rem;
    color: #fff;
    background: linear-gradient(135deg, #667eea, #764ba2);
    padding: 20px;
    border-radius: 50%;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
}

.login-box h2 {
    margin: 0 0 10px;
    padding: 0;
    color: #fff;
    text-align: center;
    font-size: 2rem;
    font-weight: 700;
}

.subtitle {
    text-align: center;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 30px;
    font-size: 0.95rem;
}

.user-box {
    position: relative;
    margin-bottom: 35px;
}

.user-box input {
    width: 100%;
    padding: 12px 15px 12px 45px;
    font-size: 16px;
    color: #fff;
    border: none;
    border-bottom: 2px solid rgba(255, 255, 255, 0.3);
    outline: none;
    background: transparent;
    transition: all 0.3s ease;
}

.user-box input:focus {
    border-bottom-color: #fff;
    background: rgba(255, 255, 255, 0.05);
}

.user-box > i {
    position: absolute;
    left: 10px;
    top: 12px;
    color: rgba(255, 255, 255, 0.6);
    font-size: 1.2rem;
}

.user-box input:focus ~ i {
    color: #fff;
}

.user-box label {
    position: absolute;
    top: 12px;
    left: 45px;
    padding: 0;
    font-size: 16px;
    color: rgba(255, 255, 255, 0.6);
    pointer-events: none;
    transition: 0.3s ease;
}

.user-box input:focus ~ label,
.user-box input:valid ~ label {
    top: -20px;
    left: 0;
    color: #fff;
    font-size: 12px;
    font-weight: 600;
}

.remember-forgot {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    font-size: 0.9rem;
}

.remember-me {
    display: flex;
    align-items: center;
    color: rgba(255, 255, 255, 0.8);
    cursor: pointer;
}

.remember-me input[type="checkbox"] {
    margin-right: 8px;
    cursor: pointer;
}

.forgot-password {
    color: #fff;
    text-decoration: none;
    transition: all 0.3s ease;
}

.forgot-password:hover {
    color: #667eea;
}

.submit-btn {
    position: relative;
    display: block;
    width: 100%;
    padding: 14px 20px;
    color: #fff;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    text-transform: uppercase;
    overflow: hidden;
    transition: all 0.5s ease;
    letter-spacing: 2px;
    border: none;
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-radius: 50px;
    cursor: pointer;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

.submit-btn:hover {
    background: linear-gradient(135deg, #764ba2, #667eea);
    box-shadow: 0 0 10px rgba(102, 126, 234, 0.8),
                0 0 20px rgba(102, 126, 234, 0.6),
                0 0 30px rgba(102, 126, 234, 0.4);
    transform: translateY(-2px);
}

.submit-btn:active {
    transform: translateY(0);
}

.submit-btn span {
    position: absolute;
    display: block;
}

.submit-btn span:nth-child(1) {
    top: 0;
    left: -100%;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.8));
    animation: btn-anim1 1.5s linear infinite;
}

@keyframes btn-anim1 {
    0% {
        left: -100%;
    }
    50%, 100% {
        left: 100%;
    }
}

.submit-btn span:nth-child(2) {
    top: -100%;
    right: 0;
    width: 2px;
    height: 100%;
    background: linear-gradient(180deg, transparent, rgba(255, 255, 255, 0.8));
    animation: btn-anim2 1.5s linear infinite;
    animation-delay: 0.375s;
}

@keyframes btn-anim2 {
    0% {
        top: -100%;
    }
    50%, 100% {
        top: 100%;
    }
}

.submit-btn span:nth-child(3) {
    bottom: 0;
    right: -100%;
    width: 100%;
    height: 2px;
    background: linear-gradient(270deg, transparent, rgba(255, 255, 255, 0.8));
    animation: btn-anim3 1.5s linear infinite;
    animation-delay: 0.75s;
}

@keyframes btn-anim3 {
    0% {
        right: -100%;
    }
    50%, 100% {
        right: 100%;
    }
}

.submit-btn span:nth-child(4) {
    bottom: -100%;
    left: 0;
    width: 2px;
    height: 100%;
    background: linear-gradient(360deg, transparent, rgba(255, 255, 255, 0.8));
    animation: btn-anim4 1.5s linear infinite;
    animation-delay: 1.125s;
}

@keyframes btn-anim4 {
    0% {
        bottom: -100%;
    }
    50%, 100% {
        bottom: 100%;
    }
}

.signup-link {
    text-align: center;
    margin-top: 25px;
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.95rem;
}

.signup-link a {
    color: #fff;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
}

.signup-link a:hover {
    color: #667eea;
}

.social-login {
    margin-top: 30px;
    padding-top: 25px;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.social-login p {
    text-align: center;
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9rem;
    margin-bottom: 15px;
}

.social-buttons {
    display: flex;
    justify-content: center;
    gap: 15px;
}

.social-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    color: #fff;
    font-size: 1.3rem;
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-btn:hover {
    background: #fff;
    color: #667eea;
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

.back-home {
    position: fixed;
    top: 30px;
    left: 30px;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 25px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50px;
    color: #fff;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    z-index: 10;
}

.back-home:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateX(-5px);
}

/* Responsive */
@media (max-width: 768px) {
    .login-box {
        padding: 40px 30px;
    }
    
    .icon-container i {
        font-size: 3rem;
        padding: 15px;
    }
    
    .login-box h2 {
        font-size: 1.6rem;
    }
    
    .back-home {
        top: 20px;
        left: 20px;
        padding: 10px 20px;
        font-size: 0.9rem;
    }
    
    .remember-forgot {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
}

@media (max-width: 480px) {
    .login-box {
        padding: 30px 20px;
    }
    
    body::before,
    body::after {
        display: none;
    }
}