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

:root {
    --primary-red: #E04E5F;
    --primary-red-dark: #C93040;
    --secondary-blue: #2c3e50;
    --text-dark: #333;
    --text-light: #eee;
    --border-grey: #ddd;
    --background-grey: #f6f5f7;
}

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

body {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    font-family: 'Montserrat', sans-serif;
    height: 100vh;
    background-image: url('https://picsum.photos/1920/1080?image=993&blur=5'), linear-gradient(to right, rgba(224, 78, 95, 0.8), rgba(44, 62, 80, 0.8));
    background-blend-mode: overlay;
    background-size: cover;
    background-position: center;
}

h1 {
    font-weight: bold;
    margin: 0;
    color: var(--secondary-blue);
    font-size: 2em;
}

p {
    font-size: 14px;
    font-weight: 100;
    line-height: 20px;
    letter-spacing: 0.5px;
    margin: 20px 0 30px;
}

span {
    font-size: 12px;
    color: #555;
    margin-bottom: 15px;
}

a {
    color: #333;
    font-size: 14px;
    text-decoration: none;
    margin: 5px 0;
    transition: color 0.2s ease-in-out;
}

a:hover {
    color: var(--primary-red);
}

button {
    border-radius: 20px;
    border: 1px solid var(--primary-red);
    background-color: var(--primary-red);
    color: #FFFFFF;
    font-size: 12px;
    font-weight: bold;
    padding: 12px 45px;
    letter-spacing: 1px;
    text-transform: uppercase;
    transition: transform 80ms ease-in, background-color 0.3s ease, color 0.3s ease;
    cursor: pointer;
}

button:active {
    transform: scale(0.95);
}

button:focus {
    outline: none;
}

button.ghost {
    background-color: transparent;
    border-color: #FFFFFF;
}

button:disabled {
    background-color: #ccc;
    border-color: #ccc;
    cursor: not-allowed;
}

form {
    background-color: rgba(255, 255, 255, 0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    padding: 0 50px;
    height: 100%;
    text-align: center;
}

.container {
    background-color: #fff;
    border-radius: 10px;
    box-shadow: 0 14px 28px rgba(0,0,0,0.25), 0 10px 10px rgba(0,0,0,0.22);
    position: relative;
    overflow: hidden;
    width: 768px;
    max-width: 100%;
    min-height: 580px;
}

.form-container {
    position: absolute;
    top: 0;
    height: 100%;
    transition: all 0.6s ease-in-out;
}

.sign-in-container {
    left: 0;
    width: 50%;
    z-index: 2;
}

.sign-up-container {
    left: 0;
    width: 50%;
    opacity: 0;
    z-index: 1;
}

.input-group {
    position: relative;
    margin: 8px 0;
    width: 100%;
}

.input-group input {
    background-color: transparent;
    border: none;
    border-bottom: 2px solid #ccc;
    padding: 12px 10px 12px 5px;
    width: 100%;
    font-size: 14px;
    color: #333;
    z-index: 1;
}

.input-group input:focus,
.input-group input:valid {
    outline: none;
    border-bottom: 2px solid var(--primary-red);
}

.input-group label {
    position: absolute;
    top: 12px;
    left: 5px;
    color: #999;
    font-size: 14px;
    transition: all 0.3s ease;
    pointer-events: none;
}

.input-group input:focus + label,
.input-group input:valid + label {
    top: -10px;
    left: 0;
    font-size: 12px;
    color: var(--primary-red);
    font-weight: 500;
}

#password-message {
    font-size: 12px;
    margin-top: 5px;
    text-align: left;
    display: block;
    height: 15px;
}
#password-message.match { color: green; }
#password-message.no-match { color: red; }

.sub-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    margin: 15px 0;
    font-size: 14px;
}
.remember-me {
    display: flex;
    align-items: center;
    gap: 5px;
    cursor: pointer;
}

.social-container {
    margin: 20px 0;
}

.social-container a {
    border: 1px solid #DDDDDD;
    border-radius: 50%;
    display: inline-flex;
    justify-content: center;
    align-items: center;
    margin: 0 5px;
    height: 40px;
    width: 40px;
    transition: all 0.3s ease;
}

.social-container a:hover {
    background: var(--primary-red-light);
    border-color: var(--primary-red);
}

.overlay-container {
    position: absolute;
    top: 0;
    left: 50%;
    width: 50%;
    height: 100%;
    overflow: hidden;
    transition: transform 0.6s ease-in-out;
    z-index: 100;
}

.overlay {
    background: var(--primary-red);
    background: -webkit-linear-gradient(to right, var(--primary-red-dark), var(--primary-red));
    background: linear-gradient(to right, var(--primary-red-dark), var(--primary-red));
    background-repeat: no-repeat;
    background-size: cover;
    background-position: 0 0;
    color: #FFFFFF;
    position: relative;
    left: -100%;
    height: 100%;
    width: 200%;
    transform: translateX(0);
    transition: transform 0.6s ease-in-out;
}

.overlay-panel {
    position: absolute;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    padding: 0 40px;
    text-align: center;
    top: 0;
    height: 100%;
    width: 50%;
    transform: translateX(0);
    transition: transform 0.6s ease-in-out;
}

.overlay-left {
    transform: translateX(-20%);
}

.overlay-right {
    right: 0;
    transform: translateX(0);
}

.container.right-panel-active .sign-in-container {
    transform: translateX(100%);
}
.container.right-panel-active .sign-up-container {
    transform: translateX(100%);
    opacity: 1;
    z-index: 5;
    animation: show 0.6s;
}
@keyframes show {
    0%, 49.99% {
        opacity: 0;
        z-index: 1;
    }
    50%, 100% {
        opacity: 1;
        z-index: 5;
    }
}
.container.right-panel-active .overlay-container {
    transform: translateX(-100%);
}
.container.right-panel-active .overlay {
    transform: translateX(50%);
}
.container.right-panel-active .overlay-left {
    transform: translateX(0);
}
.container.right-panel-active .overlay-right {
    transform: translateX(20%);
}

.home-link {
    position: absolute;
    top: 20px;
    left: 20px;
    color: white;
    font-size: 16px;
    background: rgba(0,0,0,0.3);
    padding: 10px 15px;
    border-radius: 20px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.home-link:hover {
    background: rgba(0,0,0,0.5);
    color: white;
}

.mobile-toggle {
    display: none; /* Hidden by default */
}


/* ------------------------------------------- */
/* --- NEW: MOBILE RESPONSIVE STYLES --- */
/* ------------------------------------------- */
@media (max-width: 768px) {
    body {
        height: auto;
        padding: 50px 0;
    }

    .container {
        width: 100%;
        max-width: 420px; /* Constrain width on mobile */
        min-height: 0;
        border-radius: 0;
        box-shadow: none;
        overflow: visible;
        background: transparent; /* Make main container transparent */
    }

    .overlay-container {
        display: none; /* Hide the sliding overlay on mobile */
    }

    .form-container {
        position: relative; /* Change from absolute to relative */
        width: 100%;
        background-color: rgba(255, 255, 255, 0.95);
        border-radius: 10px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.2);
    }
    
    .sign-in-container {
        left: 0;
        z-index: 2;
        /* Animation for fade */
        transition: opacity 0.3s ease-in-out, transform 0.3s ease-in-out;
    }

    .sign-up-container {
        left: 0;
        opacity: 1; /* Reset opacity */
        z-index: 1;
        margin-top: 30px; /* Space between forms */
         /* Animation for fade */
         transition: opacity 0.3s ease-in-out, transform 0.3s ease-in-out;
    }

    /* Hide one form at a time */
    .sign-in-container {
        display: flex;
    }
    .sign-up-container {
        display: none;
    }
    .container.right-panel-active .sign-in-container {
        display: none;
    }
    .container.right-panel-active .sign-up-container {
        display: flex;
    }
    
    /* Reset transforms from desktop */
    .container.right-panel-active .sign-up-container,
    .container.right-panel-active .sign-in-container {
        transform: none;
        animation: none;
    }
    
    form {
        padding: 40px 30px;
    }

    h1 {
        font-size: 1.5em;
    }

    .home-link {
        position: relative;
        margin-top: 30px;
        color: white;
        background: rgba(0,0,0,0.4);
    }
    
    .mobile-toggle {
        display: inline-block; /* Show mobile links */
        margin-top: 25px;
        font-weight: bold;
        color: var(--primary-red);
    }
}