:root {
    --page-bg: #ffffff;
    --card-bg: #F5F5F5;
    --input-bg: #FFFFFF;
    --text-primary: #464646;
    --btn-black: #1C1C1C;
    --placeholder: #C1C1C1;
    --border-color: #E0E0E0;
    
    --radius-mobile-card: 61px 61px 0px 0px;
    --radius-input: 63px;
    --radius-btn: 54px;
    --radius-card: 24px;
    
    --input-h: 69px;
    --btn-h: 65px;
    --mobile-input-w: 319px;
}

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

body {
    font-family: 'Plus Jakarta Sans', sans-serif;
    color: var(--text-primary);
    background-color: var(--page-bg);
    min-height: 100vh;
}

/* Layout Containers */
.main-wrapper {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    max-width: 1440px;
    margin: 0 auto;
}

.brand-side {
    display: none; /* Hidden on mobile/tablet */
}

.form-side {
    width: 100%;
    flex: 1;
    display: flex;
    flex-direction: column;
}

/* Mobile Styling */
.signup-auth-card {
    background-color: var(--card-bg);
    margin-top: 120px;
    border-radius: var(--radius-mobile-card);
    padding: 24px;
    /* min-height: 753px; */
    display: flex;
    flex-direction: column;
}

.back-navigation {
    margin-bottom: 24px;
}

.back-link {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 15px;
    color: var(--text-primary);
    margin-left: 14px;
}

.back-icon {
    width: 12px;
    transform: rotate(-180);
}

.auth-title {
    font-size: 25px;
    font-weight: 600;
    margin: 0 0 16px 16px;
    text-align: left;
}

/* Form & Inputs */
.auth-form {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.input-group {
    position: relative;
    margin: 16px 0;
    width: var(--mobile-input-w);
}

.form-input {
    width: 100%;
    height: var(--input-h);
    padding: 0 12px 0 50px;
    background-color: var(--input-bg);
    border: 0.5px solid var(--border-color);
    border-radius: var(--radius-input);
    font-size: 16px;
    outline: none;
}

.form-input::placeholder {
    color: var(--placeholder);
}

.input-icon {
    position: absolute;
    left: 24px;
    top: 50%;
    transform: translateY(-50%);
    width: 17px;
    height: 19px;
    pointer-events: none;
}

.btn-primary {
    width: var(--mobile-input-w);
    height: var(--btn-h);
    margin-top: 16px;
    background-color: var(--btn-black);
    color: white;
    font-weight: 600;
    border-radius: var(--radius-btn);
    border: none;
    cursor: pointer;
    transition: opacity 0.2s;
}

.btn-primary:hover {
    opacity: 0.9;
}

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-primary.loading {
    opacity: 0.8;
    cursor: wait;
}

/* Message Styles */
.error-message, .success-message {
    width: var(--mobile-input-w);
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    margin: 12px 0;
    text-align: center;
    animation: slideIn 0.3s ease;
}

.error-message {
    background-color: #fee;
    color: #d33;
    border: 1px solid #fcc;
}

.success-message {
    background-color: #efe;
    color: #3a3;
    border: 1px solid #cfc;
}

.btn-loader {
    font-size: 14px;
}

/* Input Validation Styles */
.form-input.error {
    border-color: #d33;
    background-color: #fee;
}

.form-input.error:focus {
    border-color: #d33;
    box-shadow: 0 0 0 2px rgba(211, 51, 51, 0.1);
}

.form-input:focus {
    border-color: var(--btn-black);
    box-shadow: 0 0 0 2px rgba(28, 28, 28, 0.1);
}

/* Animations */
@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.7;
    }
}

.btn-primary.loading .btn-loader {
    animation: pulse 1.5s infinite;
}

/* Desktop Styles (Media Queries) */
@media (min-width: 768px) {
    body { background-color: var(--card-bg); }
    
    .signup-auth-card {
        background-color: white;
        margin: 48px auto;
        border-radius: var(--radius-card);
        min-height: 0;
        box-shadow: 0 10px 15px rgba(0,0,0,0.1);
        max-width: 600px;
        padding: 48px;
    }
    
    .auth-title { 
        margin-left: 0; 
        text-align: center; 
        font-size: 32px; 
    }
    
    .input-group, .btn-primary { 
        width: 100%; 
        max-width: 400px; 
    }
    
    .error-message, .success-message {
        width: 100%;
        max-width: 400px;
    }
}

@media (min-width: 1280px) {
    body { background-color: white; overflow-x: hidden; }
    
    .main-wrapper {
        flex-direction: row;
        height: 100vh;
        align-items: center;
        padding: 0 48px;
        gap: 80px;
    }

    .brand-side {
        display: flex;
        flex: 1;
        height: 600px;
        background-color: #F0F0F0;
        border-radius: 24px;
        align-items: center;
        justify-content: center;
    }

    .brand-text {
        font-size: 48px;
        font-weight: 700;
        color: #CCCCCC;
    }

    .form-side {
        max-width: 500px;
    }

    .signup-auth-card{
        box-shadow: none;
        padding: 0;
        margin: 0;
        background: transparent;
    }

    .auth-title {
        text-align: left;
        font-size: 40px;
        margin-bottom: 32px;
    }

    .auth-form { align-items: flex-start; }
    
    .input-group, .btn-primary { 
        max-width: 100%; 
    }
}