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

body {
    font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    margin: 0;
    padding: 20px;
}

#signIn-Up {
    width: 100%;
    display: flex;
    justify-content: center;
}

#signIn-Up-card {
    display: none;
    background: rgba(255,255,255,0.8);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 40px 36px;
    width: 100%;
    max-width: 420px;
    border: 1px solid rgba(255,255,255,0.6);
    transition: transform 0.2s ease;
}

#signIn-Up-card h2 {
    font-size: 28px;
    font-weight: 600;
    color: #0b2b3c;
    margin-bottom: 28px;
    letter-spacing: -0.01em;
    padding-left: 16px;
}

.signIn-Up-group {
    display: flex;
    gap: 16px;
    margin-top: 16px;
    margin-bottom: 24px;
}

.signIn-Up-group button {
    flex: 1;
    padding: 14px 12px;
    border: none;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: 0.15s;
    background: white;
    color: #1c5b73;
    border: 1.5px solid #b8d3df;
    box-shadow: 0 2px 4px rgba(0,0,0,0.01);
}

#signIn-Up-Btn {
    background: white;
    color: #1c5b73;
    border: 1.5px solid #b8d3df;
}

#signIn-Up-Btn:hover {
    background: #ecf3f7;
    border-color: #7fa7b7;
}

#user-card {
    display: none;
    background: rgba(255,255,255,0.8);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 40px 36px;
    width: 100%;
    max-width: 420px;
    border: 1px solid rgba(255,255,255,0.6);
    transition: transform 0.2s ease;
}

#user-message-card h2 {
    font-size: 28px;
    font-weight: 600;
    color: #0b2b3c;
    margin-bottom: 28px;
    letter-spacing: -0.01em;
    padding-left: 16px;
}

#user-message-card label {
    display: block;
    font-size: 18px;
    font-weight: 500;
    color: #1e4a5f;
    margin-bottom: 40px;
    letter-spacing: 0.3px;
}

#user-download-card {
    margin-bottom: 20px;
}

#user-download-text {
    font-size: 18px;
    font-weight: 500;
    color: #000000;
    margin-bottom: 40px;
    letter-spacing: 0.3px;
    margin-bottom: 40px;
}


.download-group {
    display: flex;
    align-items: center;
}

.download-group label {
    flex: 1;
    font-size: 18px;
    font-weight: 500;
    color: #000000;
    margin-bottom: 40px;
    letter-spacing: 0.3px;
}

.download-group button {
    padding: 14px 12px;
    border: none;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: 0.15s;
    background: #1c5b73;
    color: white;
    border: none;
    border: 1.5px solid #1c5b73;
    margin-bottom: 40px;
}

.download-group button:hover {
    background: #134654;
    border-color: #134654;
    box-shadow: 0 8px 14px -8px #0e3a47;
}

.signOut-group {
    display: flex;
    gap: 16px;
    margin-top: 16px;
    margin-bottom: 24px;
}

.signOut-group button {
    flex: 1;
    padding: 14px 12px;
    border: none;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: 0.15s;
    background: white;
    color: #1c5b73;
    border: 1.5px solid #b8d3df;
    box-shadow: 0 2px 4px rgba(0,0,0,0.01);
}

#signOut-Btn {
    background: white;
    color: #1c5b73;
    border: 1.5px solid #b8d3df;
}

#signOut-Btn:hover {
    background: #ecf3f7;
    border-color: #7fa7b7;
}

#overlay {
    display: none;
    place-items: center;   
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5); 
    z-index: 9999;
    justify-content: center;
    align-items: center;
    color: white;
    font-size: 1.5rem;
    flex-direction: column;
    
}

.spinner {
    border: 4px solid rgba(255,255,255,0.3);
    border-top: 4px solid #fff;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin-top: 25%;
    margin-bottom: 10px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}