/* ========== Base Styles & Variables ========== */
:root {
    /* Color System */
    --color-primary: #2C3338;      /* Deep charcoal */
    --color-secondary: #8B7355;    /* Warm taupe */
    --color-background: #F5F5F0;   /* Soft ivory */
    --color-text: #1A1A1A;         /* Rich black */
    --color-accent: #9BA17F;       /* Sage green */
    
    /* Additional Colors */
    --color-white: #FFFFFF;
    --color-light-gray: #E8E8E0;
    --color-mid-gray: #BFBFBF;
    --color-dark-gray: #5A5A5A;
    --color-danger: #A54E4E;
    --color-success: #6B8E6B;
    --color-warning: #C7A156;
    --color-info: #5E7D9A;
    
    /* Typography */
    --font-serif: 'Libre Baskerville', Georgia, serif; /* Alternative to Freight Text Pro */
    --font-sans: 'Work Sans', Helvetica, Arial, sans-serif; /* Alternative to Matter */
    --font-punjabi: 'Noto Sans Gurmukhi', 'Gurmukhi MT', sans-serif; /* Punjabi font */
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-xxl: 5rem;
    
    /* Other */
    --border-radius-sm: 0.25rem;
    --border-radius-md: 0.5rem;
    --border-radius-lg: 1rem;
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease;
    --transition-slow: 0.5s ease;
    --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    --max-width: 1200px;
}

/* Reset */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    font-weight: 400;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-background);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover, a:focus {
    color: var(--color-secondary);
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-serif);
    font-weight: 400;
    line-height: 1.25;
    margin-bottom: var(--space-md);
}

h1 {
    font-size: 2.5rem;
    margin-bottom: var(--space-lg);
}

h2 {
    font-size: 2rem;
    margin-bottom: var(--space-md);
}

h3 {
    font-size: 1.5rem;
    margin-bottom: var(--space-md);
}

p {
    margin-bottom: var(--space-md);
}

ul, ol {
    margin: 0 0 var(--space-md) var(--space-lg);
}

button {
    background: none;
    border: none;
    font-family: inherit;
    font-size: inherit;
    cursor: pointer;
}

/* ========== Layout & Containers ========== */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-md);
}

section {
    padding: var(--space-xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.section-header h2 {
    font-weight: 400;
    margin-bottom: var(--space-sm);
}

.section-header p {
    color: var(--color-dark-gray);
    font-size: 1.125rem;
}

.section-footer {
    text-align: center;
    margin-top: var(--space-xl);
}

/* ========== Authentication Forms ========== */
.auth-section {
    padding: 5rem 0;
    background-color: var(--color-background);
}

.auth-container {
    max-width: 500px;
    margin: 0 auto;
    background-color: var(--color-white);
    padding: 2.5rem;
    border-radius: var(--border-radius);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
}

.auth-form {
    margin-top: 1.5rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-row {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.form-row .form-group {
    margin-bottom: 0;
    flex: 1;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--color-text-dark);
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    border: 1px solid var(--color-light-gray);
    border-radius: var(--border-radius-sm);
    background-color: var(--color-white);
    transition: border-color var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--color-primary);
}

.form-error {
    display: block;
    color: var(--color-error);
    margin-top: 0.5rem;
    font-size: 0.875rem;
}

.checkbox-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.checkbox-group label {
    margin-bottom: 0;
    cursor: pointer;
}

.checkbox {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.form-actions {
    margin-top: 2rem;
}

.form-actions .btn {
    width: 100%;
}

.auth-footer {
    margin-top: 2rem;
    text-align: center;
    padding-top: 1.5rem;
    border-top: 1px solid var(--color-light-gray);
}

.auth-footer a {
    color: var(--color-primary);
    font-weight: 500;
}

.auth-footer a:hover {
    text-decoration: underline;
}

.alert {
    padding: 1rem;
    border-radius: var(--border-radius-sm);
    margin-bottom: 1.5rem;
}

.alert-success {
    background-color: #e8f5e9;
    color: #2e7d32;
    border: 1px solid #c8e6c9;
}

.alert-error {
    background-color: #ffebee;
    color: #c62828;
    border: 1px solid #ffcdd2;
}

.alert-info {
    background-color: #e3f2fd;
    color: #1565c0;
    border: 1px solid #bbdefb;
}

.alert-warning {
    background-color: #fff8e1;
    color: #f57f17;
    border: 1px solid #ffecb3;
}

/* ========== Footer ========== */
.site-footer {
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: var(--space-xl) 0;
    margin-top: var(--space-xxl);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
}

.footer-section h3 {
    color: var(--color-white);
    margin-bottom: var(--space-md);
    font-family: var(--font-sans);
    font-weight: 600;
    font-size: 1.25rem;
}

.footer-section p {
    color: var(--color-light-gray);
}

.footer-section ul {
    list-style: none;
    margin: 0;
}

.footer-section li {
    margin-bottom: var(--space-sm);
}

.footer-section a {
    color: var(--color-light-gray);
    transition: color var(--transition-fast);
}

.footer-section a:hover {
    color: var(--color-white);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--space-lg);
    text-align: center;
    font-size: 0.875rem;
    color: var(--color-mid-gray);
}

/* ========== Buttons ========== */
.btn {
    display: inline-block;
    padding: var(--space-sm) var(--space-lg);
    border: 1px solid transparent;
    border-radius: var(--border-radius-sm);
    font-weight: 500;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 1rem;
}

.btn-block {
    display: block;
    width: 100%;
}

.btn-primary {
    background-color: var(--color-primary);
    color: var(--color-white);
    border-color: var(--color-primary);
}

.btn-primary:hover, .btn-primary:focus {
    background-color: var(--color-text);
    color: var(--color-white);
    border-color: var(--color-text);
}

.btn-secondary {
    background-color: var(--color-secondary);
    color: var(--color-white);
    border-color: var(--color-secondary);
}

.btn-secondary:hover, .btn-secondary:focus {
    background-color: #7A644A;
    color: var(--color-white);
    border-color: #7A644A;
}

.btn-outline {
    background-color: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.btn-outline:hover, .btn-outline:focus {
    background-color: var(--color-primary);
    color: var(--color-white);
}

.btn-text {
    padding: var(--space-sm);
    color: var(--color-dark-gray);
    background: transparent;
    border: none;
}

.btn-text:hover, .btn-text:focus {
    color: var(--color-primary);
    background: transparent;
}

.btn-small {
    padding: var(--space-xs) var(--space-md);
    font-size: 0.875rem;
}

.btn-danger {
    background-color: var(--color-danger);
    color: var(--color-white);
    border-color: var(--color-danger);
}

.btn-danger:hover, .btn-danger:focus {
    background-color: #8B3A3A;
    color: var(--color-white);
    border-color: #8B3A3A;
}

/* Book cover aspect-ratio box (2 : 3) */
.book-cover {
    position: relative;
    width: 100%;
    padding-top: 150%;      /*  150% = 2:3 ratio  */
    overflow: hidden;
    background: var(--color-light-gray);
}

.book-cover img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-medium);
}