:root {
    --color-primary: #374151; /* Slate Gray */
    --color-bg: #FFFFFF;
    --color-accent: #1E40AF; /* Deep Blue */
    --color-accent-warm: #F97316; /* Warm Orange */
    --color-text: #1F2937;
    --color-border: #E5E7EB;
    --color-bg-light: #F3F4F6; /* Light Gray */
    --radius-lg: 0.5rem;
    --radius-md: 0.375rem;
    --shadow-soft: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --container: 64rem;
    --gutter: 1.5rem;
    --space-1: 0.5rem;
    --space-2: 0.75rem;
    --space-3: 1rem;
    --space-4: 1.5rem;
    --space-5: 2rem;
    --space-6: 3rem;
    --space-7: 4rem;
}

* {
    box-sizing: border-box;
}

html, body {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: 'Inter', 'Lato', 'Helvetica Neue', Arial, sans-serif;
    color: var(--color-text);
    line-height: 1.6;
}

h1, h2, h3 {
    color: var(--color-primary);
    line-height: 1.2;
}

h1 {
    font-size: 3rem;
    margin-bottom: var(--space-4);
}

h2 {
    font-size: 2rem;
    margin-top: 0;
    margin-bottom: 1rem;
}

.tagline {
    font-size: 1.5rem;
    font-weight: 300;
    color: var(--color-accent);
    margin-bottom: var(--space-4);
}

.intro {
    font-size: 1.25rem;
    max-width: 40rem;
}

.btn-primary {
    display: inline-block;
    background-color: var(--color-accent-warm);
    color: var(--color-white);
    padding: var(--space-3) var(--space-5);
    border-radius: var(--radius-md);
    border: none;
    font-weight: bold;
    cursor: pointer;
    text-decoration: none;
    transition: background-color 0.2s;
}

.btn-primary:hover {
    background-color: #ea580c; /* darker orange */
    text-decoration: none;
}

/* Form Styles */
.newsletter-signup {
    clear: both;
    background-color: var(--color-bg-light);
    display: flex;
    align-items: center;
    justify-content: center;
    padding-block: 4rem;
}

.register-form {
    max-width: 30rem;
    margin: 0 auto;
    background: var(--color-bg);
    padding: var(--space-5);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
}

.form-row {
    display: flex;
    gap: var(--space-4);
}

@media (max-width: 480px) {
    .form-row {
        flex-direction: column;
        gap: 0;
    }
}

.form-row .form-group {
    flex: 1;
}

.form-group {
    margin-bottom: var(--space-4);
}

.form-group label {
    display: block;
    margin-bottom: var(--space-1);
    font-weight: bold;
}

.form-group input[type="text"],
.form-group input[type="email"] {
    width: 100%;
    padding: var(--space-2);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
}

.checkbox-group {
    display: flex;
    align-items: flex-start;
    gap: var(--space-2);
}

.checkbox-group input {
    margin-top: 0.25rem;
}

.checkbox-group label {
    font-weight: normal;
    font-size: 0.9rem;
}

/* Post Meta */
.post-meta {
    font-size: 0.9rem;
    color: #6b7280;
    margin-bottom: var(--space-2);
}

/* Blog Teasers */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(18rem, 1fr));
    gap: var(--space-5);
    margin-top: var(--space-5);
}

.blog-teaser {
    background: var(--color-bg);
    padding: var(--space-5);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
    display: flex;
    flex-direction: column;
}

.blog-teaser h3 {
    font-size: 1.25rem;
    margin-bottom: var(--space-1);
}

.blog-teaser h3 a {
    color: var(--color-primary);
    text-decoration: none;
}

.blog-teaser h3 a:hover {
    color: var(--color-accent);
    text-decoration: underline;
}

.blog-teaser p {
    font-size: 1rem;
    margin-bottom: var(--space-4);
    flex-grow: 1;
}

.read-more {
    color: var(--color-accent-warm);
    font-weight: bold;
    text-decoration: none;
}

.read-more:hover {
    text-decoration: underline;
}

/* About Author */
.author-profile blockquote {
    border-left: 4px solid var(--color-accent);
    padding-left: var(--space-3);
    font-style: italic;
    margin: var(--space-4) 0;
    clear: both;
}

.author-images {
    display: flex;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
    flex-wrap: wrap;
}

@media (max-width: 480px) {
    .author {
        width: 100%;
    }
}

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

h1 {
    font-size: calc(1rem + 1.5vw);
    margin-bottom: 3rem;
}

a {
    color: var(--color-secondary);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

/* Sections */
section {
    padding-block: var(--space-6);
    padding-inline: var(--gutter);
}

.container {
    width: 100%;
    max-width: var(--container);
    margin-inline: auto;
    padding-inline: var(--gutter);
}

/* Ensure consistent horizontal padding within sections when using .container */
section > .container {
    padding-inline: 0;
}

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(31, 59, 87, 0.65);
    backdrop-filter: blur(0.375rem);
    border-bottom: 0.0625rem solid rgba(229, 229, 229, 0.5);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-3) 0;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 1rem;
    color: var(--color-bg);
}

.brand:hover {
    text-decoration: none;
}

.brand-logo {
    width: 2.25rem;
}

.brand-name {
    font-weight: 700;
    letter-spacing: 0.0125rem;
}

.site-nav .nav-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    gap: 2rem;
}

.site-nav a {
    color: var(--color-white);
}

.site-nav a:hover {
    color: var(--color-white);
}

.hero {
    background-image: linear-gradient(rgba(55, 65, 81, 0.4), rgba(55, 65, 81, 0.4)), url('../images/background-1.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    color: var(--color-white);
    padding-block: var(--space-7);
    text-align: left;
}

.hero h1 {
    color: var(--color-white);
    margin-bottom: var(--space-2);
}

.hero .tagline {
    color: var(--color-white);
    font-size: 1.75rem;
}

.hero .intro {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.25rem;
}


blockquote {
    margin: var(--space-4) 0 0;
    padding-left: var(--space-4);
    border-left: 0.1875rem solid var(--color-primary);
    color: var(--color-primary);
    font-style: italic;
}

.copyright {
    padding: var(--space-4) 0;
    color: var(--color-muted-text);
    border-top: 0.0625rem solid rgba(255, 255, 255, 0.06);
}

.visually-hidden {
    position: absolute !important;
    clip: rect(0.0625rem, 0.0625rem, 0.0625rem, 0.0625rem);
    padding: 0 !important;
    border: 0 !important;
    height: 0.0625rem !important;
    width: 0.0625rem !important;
    overflow: hidden;
}

/* Footer (site footer styles matching brand colors) */
footer {
    background: var(--color-primary);
    color: var(--color-white);
}

footer a {
    color: var(--color-neutral);
}

footer a:hover {
    color: var(--color-neutral);
    text-decoration: underline;
}

footer .footer-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
    padding: var(--space-5) 0 var(--space-4);
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

footer .footer-logo {
    color: var(--color-white);
    line-height: 1.5;
}

footer .social-links {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

footer .social-links li {
    list-style: none;
    margin: 0;
    padding: 0;
}

footer .footer-legal {
    text-align: center;
    font-size: 0.9rem;
    padding: var(--space-3) 0 var(--space-5);
}

footer .footer-legal p {
    color: var(--color-white);
}

@media (max-width: 48rem) {
    footer .footer-content {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-3);
    }
}

.target-audience {
  text-align: center;
  font-size: 1.5rem;
  font-weight: 300;
  max-width: 50rem;
  margin-inline: auto;
  padding-block: 4rem;
}

.book {
    width: 50%;
    float: right;
    padding-left: 2rem;
}

.author {
    height: auto;
    width: calc(33.333% - (var(--space-3) * 2 / 3));
    aspect-ratio: 1 / 1;
    object-fit: cover;
    border-radius: var(--radius-md);
}