/* General layout */
*,
*::before,
*::after {
    box-sizing: border-box;
}

body,
html {
    height: 100%;
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
    overflow-x: hidden;
}

/* Particles background */
#particles-js {
    position: fixed;
    width: 100%;
    height: 100%;
    background-color: #fe5b5b;
    background-image: linear-gradient(135deg, #fc8181 0%, #150000 100%);
    z-index: -1;
}

/* Center content */
.content-container {
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

/* Login box */
.login-box {
    width: 100%;
    max-width: 440px;
    padding: 50px;
    background: rgba(0, 0, 0, 0.7);
    border-radius: 12px;
    color: #fff;
    box-shadow: 0 0 40px rgba(255, 255, 255, 0.55);
}

/* Input group container */
.input-group {
    position: relative;
    margin-bottom: 20px;
}

.input-group i {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 18px;
    color: #ea8798;
}

.input-group input {
    width: 100%;
    padding: 12px 12px 12px 40px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid #ea8798;
    color: white;
    border-radius: 6px;
    font-size: 17px;
}

.input-group input::placeholder {
    color: #eeb9c3;
}

/* Button */
button {
    width: 100%;
    padding: 12px;
    background: #ea8798;
    border: none;
    border-radius: 6px;
    color: #fff;
    font-weight: bold;
    font-size: 17px;
    cursor: pointer;
    transition: 0.3s;
}

button:hover {
    background: #b67a7a;
}

/* Signup link */
a {
    color: #FFD700;
    text-decoration: none;
    margin-top: 12px;
    display: inline-block;
}

/* ==============================
   📱 RESPONSIVE DESIGN
================================*/

/* Tablets */
@media (max-width: 768px) {
    .content-container {
        padding: 15px;
    }

    .login-box {
        max-width: 380px;
        padding: 40px 35px;
    }

    h2 {
        font-size: 26px;
        margin-bottom: 25px;
    }

    .input-group input {
        font-size: 16px;
        padding: 14px 14px 14px 42px;
    }

    button {
        font-size: 16px;
        padding: 14px;
    }
}

/* Small phones */
@media (max-width: 480px) {
    .content-container {
        padding: 10px;
    }

    .login-box {
        max-width: 100%;
        padding: 30px 25px;
    }

    h2 {
        font-size: 22px;
        margin-bottom: 20px;
    }

    .input-group {
        margin-bottom: 16px;
    }

    .input-group input {
        padding: 12px 12px 12px 38px;
        font-size: 15px;
    }

    .input-group i {
        font-size: 16px;
        left: 10px;
    }

    button {
        font-size: 15px;
        padding: 12px;
    }

    a {
        font-size: 14px;
        margin-top: 15px;
    }
}

/* Mini phones (very small screens) */
@media (max-width: 350px) {
    .login-box {
        padding: 25px 18px;
    }

    h2 {
        font-size: 20px;
    }

    .input-group input {
        font-size: 14px;
        padding: 10px 10px 10px 35px;
    }

    .input-group i {
        font-size: 14px;
    }

    button {
        font-size: 14px;
        padding: 10px;
    }

    a {
        font-size: 13px;
    }
}