:root { 
    --brand-navy: #0D3A63; 
    --brand-navy-light: #16538c; 
    --brand-green: #76f0b7; 
    --brand-green-dark: #4ade80;
    --brand-teal: #12828C; 
    
    --bg-gradient-start: #0D3A63;
    --bg-gradient-end: #071b2f;
    
    --card-bg: #ffffff; 
    --text-main: #0f172a; 
    --text-muted: #64748b; 
    --input-bg: #f8fafc;
    --input-border: #cbd5e1;
}

body { 
    /* Premium dark background gradient */
    background: linear-gradient(135deg, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 100%);
    font-family: 'Inter', sans-serif; 
    min-height: 100vh; 
    display: flex; 
    align-items: center; 
    justify-content: center; 
    margin: 0; 
    padding: 20px;
    color: var(--text-main);
    position: relative;
}

/* Subtle abstract background pattern */
body::before {
    content: "";
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background-image: radial-gradient(circle at 2px 2px, rgba(255, 255, 255, 0.05) 1px, transparent 0);
    background-size: 32px 32px;
    pointer-events: none;
    z-index: 0;
}

/* Modern Centered Floating Card */
.login-wrapper { 
    display: flex; 
    flex-direction: column;
    width: 100%; 
    max-width: 480px; 
    background: var(--card-bg); 
    border-radius: 24px; 
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5); 
    overflow: hidden; 
    z-index: 10; 
    padding: 40px 50px;
    position: relative;
}

/* Top Branding Area */
.brand-header { 
    text-align: center; 
    margin-bottom: 40px; 
}

.brand-logo-container { 
    margin-bottom: 20px; 
}

.brand-logo { 
    max-width: 220px; 
    height: auto; 
}

.brand-header h2 { 
    font-weight: 800; 
    letter-spacing: -0.5px; 
    font-size: 1.5rem; 
    color: var(--brand-navy); 
    margin-bottom: 8px;
}

.brand-header p { 
    color: var(--text-muted); 
    font-size: 0.9rem; 
    line-height: 1.5; 
    margin: 0;
}

/* Input Styling - Clean Light Mode */
.form-label { 
    font-size: 0.8rem; 
    font-weight: 700; 
    color: var(--brand-navy); 
    letter-spacing: 0.3px; 
} 

.auth-link { 
    color: var(--brand-teal); 
    font-weight: 600; 
    font-size: 0.8rem; 
    text-decoration: none; 
    transition: color 0.2s; 
}
.auth-link:hover { color: var(--brand-navy); text-decoration: underline; }

.input-group { 
    border-radius: 12px; 
    overflow: hidden; 
    border: 1.5px solid var(--input-border); 
    background-color: var(--input-bg); 
    transition: all 0.3s ease; 
}

.input-group:focus-within { 
    border-color: var(--brand-teal); 
    box-shadow: 0 0 0 4px rgba(18, 130, 140, 0.1); 
    background-color: #ffffff; 
}

.input-group-text { 
    background: transparent; 
    border: none; 
    color: #94a3b8; 
    padding-left: 18px; 
}

.form-control { 
    border: none; 
    background: transparent; 
    padding: 14px 12px; 
    color: var(--text-main); 
    font-weight: 500; 
    font-size: 1rem; 
}
.form-control::placeholder { color: #94a3b8; font-weight: 400; }
.form-control:focus { background: transparent; box-shadow: none; outline: none; }

.toggle-password-btn { 
    background: transparent; 
    border: none; 
    color: #94a3b8; 
    padding-right: 18px; 
    cursor: pointer; 
    transition: color 0.2s; 
}
.toggle-password-btn:hover { color: var(--brand-teal); }

/* Button Styling */
.btn-login { 
    background-color: var(--brand-green); 
    color: #0f172a; /* Dark text for contrast against light green */
    padding: 16px; 
    font-size: 1rem;
    font-weight: 800; 
    border-radius: 12px; 
    border: none; 
    width: 100%;
    transition: all 0.3s ease; 
    box-shadow: 0 4px 15px rgba(118, 240, 183, 0.3);
    letter-spacing: 0.5px;
    margin-top: 10px;
}

.btn-login:hover:not(:disabled) { 
    background-color: var(--brand-green-dark); 
    transform: translateY(-2px); 
    box-shadow: 0 8px 20px rgba(118, 240, 183, 0.4); 
}

.btn-login:disabled { 
    background-color: #e2e8f0; 
    color: #94a3b8; 
    cursor: not-allowed; 
    box-shadow: none; 
}

.footer-text { 
    text-align: center;
    color: #94a3b8; 
    font-size: 0.8rem; 
    font-weight: 500; 
    margin-top: 30px;
}

/* Modal Overrides for Light Theme */
.modal-content { 
    background-color: #ffffff !important; 
    color: var(--text-main); 
    border: none !important; 
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}
.modal-header { 
    background-color: #f8fafc !important; 
    border-bottom: 1px solid #e2e8f0 !important; 
}
.modal-footer {
    border-top: 1px solid #e2e8f0 !important;
}
.modal-title { color: var(--brand-navy) !important; }
.modal-title i { color: var(--brand-teal) !important; }

/* Warning Info Box */
.info-box {
    background-color: #f1f5f9;
    border-left: 3px solid var(--brand-teal);
    border-radius: 6px;
    padding: 10px 15px;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 15px;
}

@media (max-width: 576px) { 
    .login-wrapper { padding: 30px 20px; border-radius: 16px; } 
}