:root {
    --primary-color: #FACC15; /* Gold/Yellow Accent */
    --background-color: #0c0a24; /* Deep, dark blue/purple */
    --card-background: rgba(255, 255, 255, 0.05);
    --text-primary: #FFFFFF;
    --text-secondary: #E5E7EB; /* Light Gray */
    --border-color: rgba(255, 255, 255, 0.2);
    --font-family: 'Inter', sans-serif;
}
* { 
    margin: 0; 
    padding: 0; 
    box-sizing: border-box; 
}
body {
    font-family: var(--font-family);
    background-color: var(--background-color);
    background-image:
        radial-gradient(at 80% 20%, hsla(284, 70%, 25%, 1) 0px, transparent 50%),
        radial-gradient(at 20% 90%, hsla(220, 70%, 35%, 1) 0px, transparent 50%);
    color: var(--text-primary);
    max-width: 480px;
    margin: 0 auto;
    min-height: 100vh;
}
#app-content { 
    padding-bottom: 70px; 
}
.bottom-nav { 
    position: fixed; 
    bottom: 0; 
    left: 50%; 
    transform: translateX(-50%); 
    width: 100%; 
    max-width: 480px; 
    height: 70px; 
    background-color: rgba(0, 0, 0, 0.3); 
    backdrop-filter: blur(10px); 
    -webkit-backdrop-filter: blur(10px);
    border-top: 1px solid var(--border-color); 
    display: flex; 
    justify-content: space-around; 
    align-items: center; 
}
.nav-link { 
    display: flex; 
    flex-direction: column; 
    align-items: center; 
    justify-content: center; 
    color: var(--text-secondary); 
    text-decoration: none; 
    font-size: 0.75rem; 
    flex-grow: 1; 
}
.nav-link i { 
    font-size: 1.5rem; 
    margin-bottom: 4px; 
}
.nav-link.active { 
    color: var(--primary-color); 
}
.auth-container { 
    padding: 2rem; 
    text-align: center; 
    height: 100vh; 
    display: flex; 
    flex-direction: column; 
    justify-content: center; 
}
.auth-logo { 
    font-family: 'Inter', sans-serif; 
    font-weight: 700; 
    font-size: 2.5rem; 
    margin-bottom: 1rem; 
    color: var(--primary-color); 
}
.auth-container h2 { 
    font-size: 1.8rem; 
    margin-bottom: 0.5rem; 
    font-weight: 600; 
}
.auth-container p { 
    color: var(--text-secondary); 
    margin-bottom: 2rem; 
}
.form-group { 
    text-align: left; 
    margin-bottom: 1.5rem; 
}
.form-group label { 
    display: block; 
    margin-bottom: 0.5rem; 
    font-weight: 500; 
}
.form-group input { 
    width: 100%; 
    padding: 1rem; 
    border: 1px solid var(--border-color); 
    background: var(--card-background); 
    border-radius: 0.5rem; 
    color: var(--text-primary); 
    font-size: 1rem; 
}
.auth-link { 
    margin-top: 1.5rem; 
}
.auth-link a { 
    font-weight: 600; 
    cursor: pointer; 
}
.btn-auth { 
    width: 100%; 
    padding: 1rem; 
    border: none; 
    border-radius: 0.5rem; 
    background: var(--primary-color); 
    color: #1E40AF; 
    font-size: 1.1rem; 
    font-weight: 700; 
    cursor: pointer; 
    margin-top: 1rem; 
}
.btn-cta {
    background-color: var(--primary-color);
    color: var(--background-color);
    padding: 12px 28px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    display: inline-block;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    cursor: pointer;
}
.btn-cta:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(224, 197, 110, 0.2);
}

/* --- MODAL STYLES --- */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}
.modal-content {
    background: linear-gradient(135deg, #1e40af, #4c1d95);
    padding: 2rem;
    border-radius: 1rem;
    text-align: center;
    width: 90%;
    max-width: 350px;
    border: 1px solid var(--border-color);
    box-shadow: 0 10px 30px rgba(0,0,0,0.4);
}
.modal-icon {
    font-size: 4rem;
    color: #4ade80; /* Success green */
    margin-bottom: 1rem;
}
.modal-content h2 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}
.modal-content p {
    color: var(--text-secondary);
    margin-bottom: 2rem;
}
#closeModalBtn {
    width: 100%;
}