/* * Professional Dark Theme Styles for Trading Platform Login
 * Focused on Centering and Vertical Compactness (vh optimization)
 */

/* 1. Define Professional Color Variables */
:root {
    --dark-primary: #0d1117; 
    --dark-secondary: #161b22; 
    --dark-tertiary: #21262d; 
    --border-color: #30363d; 
    
    --green-accent: #00ff73; 
    --error-bg: #2e1717; /* Dark reddish background for error */
    --error-border: #7c1a1a; /* Red border for error */
    --error-text: #ffb8b8; /* Light red text for error */

    --text-light: #c9d1d9; 
    --text-secondary-light: #8b949e; 
}

/* 2. Global Body & Typography (Centering Logic) */
html, body {
    /* Critical for centering on the screen */
    height: 100%;
    min-height: 100vh; 
    margin: 0;
}

body {
    display: flex;
    /* Centers horizontally */
    justify-content: center; 
    /* Centers vertically */
    align-items: center; 
    background-color: var(--dark-primary); 
    font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
}

/* 3. Login Container Styling */
.login-container {
    background-color: var(--dark-secondary); 
    border-radius: 12px; 
    padding: 20px 30px; /* Maintained for compactness */
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.7); 
    max-width: 350px; 
    width: 90%;
    
    /* --- UPDATED STYLES: Removed max-height and overflow-y --- */
    /* Container now auto-sizes to content and is centered by the body's flex properties. */
    
    border: 1px solid var(--border-color); 
    transition: box-shadow 0.3s ease;
}

.login-container:hover {
    box-shadow: 0 0 20px rgba(0, 255, 115, 0.1);
}

/* 4. Headings & Text (Reduced vertical margins) */
.login-container h5 {
    color: var(--text-secondary-light);
    font-weight: 500;
    margin-bottom: 5px;
    text-align: center;
    font-size: 1rem;
    letter-spacing: 0.1em; 
    text-transform: uppercase;
    margin-top: 5px; 
}

.login-container h6 {
    color: var(--green-accent);
    font-weight: 800; 
    margin-bottom: 20px; 
    text-align: center;
    font-size: 2rem; 
    line-height: 1;
}

.form-label {
    color: var(--text-light);
    font-weight: 500;
    font-size: 0.9rem;
    margin-bottom: 3px; 
}

/* 5. Form Controls (Input Fields) */
.form-control {
    background-color: var(--dark-tertiary); 
    border: 1px solid var(--border-color);
    color: var(--text-light);
    padding: 10px 12px; 
    border-radius: 8px;
    font-size: 0.95rem; 
    font-family: 'Inter', sans-serif; 
}

/* Placeholder styling to ensure visibility in dark mode */
.form-control::placeholder {
    color: var(--text-secondary-light);
    opacity: 0.5; /* Slightly faded */
}

.form-control:focus {
    background-color: var(--dark-tertiary); 
    border-color: var(--green-accent); 
    box-shadow: 0 0 0 1px var(--green-accent), 0 0 5px rgba(0, 255, 115, 0.3); 
    color: var(--text-light);
}

/* 6. Professional Inline Error Message Styling */
.alert-error-custom {
    background-color: var(--error-bg); 
    border: 1px solid var(--error-border); 
    color: var(--error-text); 
    padding: 10px 15px;
    border-radius: 8px;
    font-size: 0.9rem;
}

.alert-error-custom i {
    color: var(--error-border); /* Icon color matches border for intensity */
}

/* 7. Login Button (High Contrast Accent) */
.btn-login {
    background-color: var(--green-accent) !important; 
    border-color: var(--green-accent) !important;
    color: var(--dark-primary) !important; 
    font-weight: 700;
    padding: 10px 20px; 
    border-radius: 50px; 
    font-size: 1rem; 
    transition: background-color 0.3s ease, transform 0.2s ease, box-shadow 0.3s ease;
    width: 100%;
    margin-top: 15px; 
    box-shadow: 0 5px 20px rgba(0, 255, 115, 0.4);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.btn-login:hover {
    background-color: #38ff91 !important; 
    border-color: #38ff91 !important;
    transform: translateY(-1px);
    box-shadow: 0 8px 25px rgba(0, 255, 115, 0.6);
}

/* 8. Links and Footer Text */
.text-link, .text-center.mt-4 p, .form-check-label {
    color: var(--text-secondary-light);
    font-size: 0.85rem; 
    font-family: 'Inter', sans-serif; 
}

.text-link:hover {
    color: var(--green-accent);
}

/* Responsive adjustments for smaller screens */
@media (max-width: 576px) {
    .login-container {
        padding: 15px; /* Further reduction on tiny screens */
    }
}