/* ==========================================================================
   AUTHENTICATION MODULE (LOGIN & SIGNUP)
   Premium White Theme
   ========================================================================== */

/* --- Main Container --- */
#auth-section { 
    height: 100vh; 
    display: flex; 
    flex-direction: column; 
    justify-content: center; 
    align-items: center; 
    background: #ffffff; /* Pure White Background */
    z-index: 1000; 
    position: absolute; 
    width: 100%; 
    top: 0; 
}

/* --- Auth Card (3D Board Style) --- */
.auth-card { 
    background: #ffffff; 
    padding: 2.5rem; 
    border-radius: 35px; 
    width: 90%; 
    max-width: 380px; 
    border: 1px solid #e2e8f0; 
    text-align: center; 
    box-shadow: 0 20px 40px rgba(0,0,0,0.08), 0 1px 3px rgba(0,0,0,0.05); 
}

/* --- Typography --- */
.logo-text { 
    font-size: 2.2rem; 
    font-weight: 800; 
    background: linear-gradient(135deg, #10002b, #ff006e); 
    -webkit-background-clip: text; 
    -webkit-text-fill-color: transparent; 
    margin-bottom: 2rem; 
    letter-spacing: -1px; 
}

.auth-switch { 
    margin-top: 1.5rem; 
    color: #64748b; 
    font-size: 0.9rem; 
    cursor: pointer; 
    font-weight: 600; 
    transition: color 0.2s ease;
}

.auth-switch:active {
    color: var(--primary);
}

/* --- Input Fields --- */
.input-group { 
    position: relative; 
    margin-bottom: 1rem; 
}

.input-group input { 
    width: 100%; 
    padding: 16px; 
    background: #f1f5f9; 
    border: 2px solid #e2e8f0; 
    border-radius: 16px; 
    color: #1a1a1a; 
    outline: none; 
    transition: 0.3s; 
    font-size: 1rem; 
}

.input-group input:focus { 
    border-color: #ff006e; 
    background: #ffffff; 
    box-shadow: 0 0 0 4px rgba(255, 0, 110, 0.1); 
}

/* --- Status Icons (Checkmark/Cross in Inputs) --- */
.username-status { 
    position: absolute; 
    right: 15px; 
    top: 50%; 
    transform: translateY(-50%); 
    font-size: 1.1rem; 
}

.status-valid { color: var(--success); }
.status-invalid { color: var(--danger); }
#login-user-icon { color: #94a3b8 !important; }

/* --- Auth Action Button --- */
#auth-section .btn-primary { 
    width: 100%; 
    padding: 16px; 
    background: linear-gradient(135deg, #ff006e, #8338ec); 
    border: none; 
    border-radius: 16px; 
    color: white; 
    font-weight: 700; 
    font-size: 1rem; 
    cursor: pointer; 
    transition: 0.2s; 
    box-shadow: 0 8px 20px rgba(255, 0, 110, 0.3); 
}

#auth-section .btn-primary:active {
    transform: scale(0.96);
}

#auth-section .btn-primary:disabled { 
    background: #cbd5e1; 
    cursor: not-allowed; 
    box-shadow: none; 
}

/* --- Instagram Support Link in Auth --- */
.auth-help-section {
    margin-top: 20px; 
    cursor: pointer; 
    animation: fadeIn 0.8s;
}

.auth-help-section p {
    color: #64748b; /* Updated for white theme */
    font-size: 0.85rem; 
    margin-bottom: 5px;
    font-weight: 500;
}

.insta-auth-link { 
    display: inline-flex; 
    align-items: center; 
    gap: 8px; 
    background: #fdf2f8; 
    padding: 8px 18px; 
    border-radius: 20px; 
    color: #ff006e; 
    font-weight: 700; 
    font-size: 0.9rem; 
    border: 1px solid rgba(255, 0, 110, 0.3); 
    transition: 0.3s; 
    box-shadow: 0 4px 10px rgba(255, 0, 110, 0.1); 
}

.insta-auth-link i { 
    font-size: 1.2rem; 
    background: linear-gradient(45deg, #f09433, #dc2743, #bc1888); 
    -webkit-background-clip: text; 
    -webkit-text-fill-color: transparent; 
}

.insta-auth-link:active { 
    transform: scale(0.95); 
    background: rgba(255, 0, 110, 0.1); 
}

/* --- JS Error Shake Animation --- */
@keyframes inputShake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

.input-error-shake {
    animation: inputShake 0.3s ease-in-out;
    border-color: var(--danger) !important;
}