/* ===== DESIGN TOKENS ===== */

:root {
    /* Colors */
    --color-ink: #2b2b2b;
    --color-sun: #ffdb80;
    --color-mist: #a5b8b8;
    --color-paper: #ffffff;
    --color-border: rgba(43, 43, 43, 0.12);
    --color-border-strong: rgba(43, 43, 43, 0.2);
    --color-divider: rgba(43, 43, 43, 0.08);
    --color-success: #2e7d32;
    --color-warning: #b26a00;
    --color-danger: #b00020;
    --color-info: #1f5fbf;

    /* Typography */
    --font-display: "Plus Jakarta Sans", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --font-body: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

    /* Spacing */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 24px;
    --space-6: 32px;
    --space-7: 40px;
    --space-8: 48px;
    --space-9: 64px;
    --space-10: 80px;
    --space-11: 96px;

    /* Radii */
    --radius-sm: 10px;
    --radius-md: 16px;
    --radius-lg: 24px;

    /* Shadows */
    --shadow-soft: 0 8px 24px rgba(43, 43, 43, 0.08);
    --shadow-lift: 0 2px 10px rgba(43, 43, 43, 0.06);

    /* Layout */
    --container-max: 1120px;
    --container-narrow: 760px;

    /* Motion */
    --ease-standard: cubic-bezier(0.2, 0.8, 0.2, 1);
    --dur-fast: 150ms;
    --dur-med: 220ms;
}


/* ===== RESET ===== */

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


/* ===== BASE ===== */

body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background: var(--color-paper);
    color: var(--color-ink);
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

#main-content {
    flex: 1;
}

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

a {
    color: var(--color-ink);
    text-decoration-thickness: 1px;
    text-underline-offset: 2px;
    transition: opacity var(--dur-fast) var(--ease-standard);
}

a:hover {
    opacity: 0.7;
}


/* ===== TYPOGRAPHY ===== */

h1, h2, h3 {
    font-family: var(--font-display);
    font-weight: 700;
    letter-spacing: -0.01em;
}

h1 {
    font-size: clamp(1.9rem, 2.4vw, 2.5rem);
    line-height: 1.15;
}

h2 {
    font-size: clamp(1.5rem, 1.8vw, 1.9rem);
    line-height: 1.2;
    margin-bottom: var(--space-4);
}

h3 {
    font-size: 1.25rem;
    line-height: 1.25;
    margin-bottom: var(--space-3);
}

p {
    max-width: 70ch;
    margin-bottom: var(--space-4);
}

p:last-child {
    margin-bottom: 0;
}

small, .text-sm {
    font-size: 0.925rem;
    line-height: 1.5;
}

.text-center {
    text-align: center;
}

.text-center p {
    margin-left: auto;
    margin-right: auto;
}


/* ===== LAYOUT ===== */

.container {
    width: 100%;
    max-width: var(--container-max);
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--space-5);
    padding-right: var(--space-5);
}

.container-narrow {
    width: 100%;
    max-width: var(--container-narrow);
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--space-5);
    padding-right: var(--space-5);
}

.section {
    padding-top: var(--space-10);
    padding-bottom: var(--space-10);
}

.section-mist {
    background: rgba(165, 184, 184, 0.1);
}

.section-actions {
    display: flex;
    gap: var(--space-3);
    justify-content: center;
    flex-wrap: wrap;
    margin-top: var(--space-6);
}


/* ===== HEADER ===== */

.site-header {
    padding: var(--space-4) 0;
    border-bottom: 1px solid var(--color-divider);
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.site-logo {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.125rem;
    text-decoration: none;
    color: var(--color-ink);
}

.site-logo:hover {
    opacity: 1;
}

.site-nav {
    display: flex;
    align-items: center;
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-2);
    color: var(--color-ink);
}

.nav-list {
    display: flex;
    align-items: center;
    gap: var(--space-5);
    list-style: none;
}

.nav-list a {
    font-size: 0.925rem;
    font-weight: 500;
    text-decoration: none;
}

.nav-list a:hover {
    opacity: 0.7;
}

.site-nav-minimal {
    display: flex;
    align-items: center;
}


/* ===== FOOTER ===== */

.site-footer {
    padding-top: var(--space-9);
    padding-bottom: var(--space-6);
    border-top: 1px solid var(--color-divider);
    margin-top: auto;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--space-8);
    margin-bottom: var(--space-8);
}

.footer-brand .site-logo {
    display: inline-block;
    margin-bottom: var(--space-3);
}

.footer-tagline {
    font-size: 0.925rem;
    color: rgba(43, 43, 43, 0.65);
    max-width: 40ch;
}

.footer-heading {
    font-family: var(--font-display);
    font-size: 0.925rem;
    font-weight: 600;
    margin-bottom: var(--space-3);
}

.footer-nav ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.footer-nav a {
    font-size: 0.925rem;
    text-decoration: none;
    color: rgba(43, 43, 43, 0.65);
}

.footer-nav a:hover {
    color: var(--color-ink);
    opacity: 1;
}

.footer-bottom {
    padding-top: var(--space-5);
    border-top: 1px solid var(--color-divider);
}

.footer-bottom p {
    font-size: 0.85rem;
    color: rgba(43, 43, 43, 0.5);
}


/* ===== BUTTONS ===== */

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    height: 44px;
    padding: 0 var(--space-5);
    font-family: var(--font-body);
    font-size: 0.925rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius-md);
    border: 1.5px solid transparent;
    cursor: pointer;
    transition: all var(--dur-fast) var(--ease-standard);
    white-space: nowrap;
}

.btn:hover {
    opacity: 1;
}

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

.btn-primary:hover {
    box-shadow: var(--shadow-lift);
    filter: brightness(0.95);
}

.btn-secondary {
    background: var(--color-paper);
    color: var(--color-ink);
    border-color: var(--color-border-strong);
}

.btn-secondary:hover {
    border-color: var(--color-ink);
}

.btn-tertiary {
    background: transparent;
    color: var(--color-ink);
    border-color: transparent;
    padding: 0 var(--space-3);
}

.btn-tertiary:hover {
    text-decoration: underline;
}

.btn-sm {
    height: 36px;
    padding: 0 var(--space-4);
    font-size: 0.85rem;
}


/* ===== CARDS ===== */

.card {
    background: var(--color-paper);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    transition: box-shadow var(--dur-med) var(--ease-standard);
}

.card-link {
    display: block;
    text-decoration: none;
    color: var(--color-ink);
}

.card-link:hover {
    box-shadow: var(--shadow-soft);
    opacity: 1;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--space-5);
}

.card h3 {
    margin-bottom: var(--space-2);
}

.card p {
    font-size: 0.925rem;
    color: rgba(43, 43, 43, 0.75);
}

.card-meta {
    display: flex;
    gap: var(--space-3);
    font-size: 0.85rem;
    color: rgba(43, 43, 43, 0.5);
    margin-top: var(--space-3);
}


/* ===== HERO ===== */

.hero {
    padding-top: var(--space-11);
    padding-bottom: var(--space-10);
    text-align: center;
}

.hero h1 {
    max-width: 20ch;
    margin-left: auto;
    margin-right: auto;
    margin-bottom: var(--space-4);
}

.hero-sm {
    padding-top: var(--space-10);
    padding-bottom: var(--space-8);
}

.hero-subtitle {
    font-size: 1.125rem;
    color: rgba(43, 43, 43, 0.7);
    max-width: 50ch;
    margin-left: auto;
    margin-right: auto;
}

.hero-actions {
    display: flex;
    gap: var(--space-3);
    justify-content: center;
    flex-wrap: wrap;
    margin-top: var(--space-6);
}


/* ===== BLOG ARTICLE ===== */

.blog-article {
    padding-bottom: var(--space-10);
}

.article-header {
    margin-top: var(--space-8);
    margin-bottom: var(--space-6);
}

.article-header h1 {
    margin-bottom: var(--space-4);
}

.article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    font-size: 0.85rem;
    color: rgba(43, 43, 43, 0.55);
}

.article-intro {
    font-size: 1.0625rem;
    line-height: 1.6;
    margin-bottom: var(--space-8);
    padding-bottom: var(--space-6);
    border-bottom: 1px solid var(--color-divider);
}

.article-section {
    margin-bottom: var(--space-8);
}

.article-section h2 {
    margin-bottom: var(--space-4);
}

.article-section p {
    margin-bottom: var(--space-4);
}

.article-section ul,
.article-section ol {
    margin-bottom: var(--space-4);
    padding-left: var(--space-6);
}

.article-section li {
    margin-bottom: var(--space-2);
}


/* ===== BREADCRUMBS ===== */

.breadcrumbs {
    padding-top: var(--space-5);
}

.breadcrumbs ol {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    list-style: none;
    font-size: 0.85rem;
    color: rgba(43, 43, 43, 0.55);
}

.breadcrumbs li:not(:last-child)::after {
    content: "/";
    margin-left: var(--space-2);
    color: rgba(43, 43, 43, 0.3);
}

.breadcrumbs a {
    color: rgba(43, 43, 43, 0.55);
    text-decoration: none;
}

.breadcrumbs a:hover {
    color: var(--color-ink);
    opacity: 1;
}


/* ===== TABLE OF CONTENTS ===== */

.toc {
    background: rgba(165, 184, 184, 0.1);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-5);
    margin-bottom: var(--space-8);
}

.toc-heading {
    font-size: 0.925rem;
    font-weight: 600;
    margin-bottom: var(--space-3);
}

.toc ol {
    list-style: decimal;
    padding-left: var(--space-5);
}

.toc li {
    margin-bottom: var(--space-2);
    font-size: 0.925rem;
}

.toc a {
    color: rgba(43, 43, 43, 0.7);
    text-decoration: none;
}

.toc a:hover {
    color: var(--color-ink);
    opacity: 1;
}


/* ===== CALLOUTS ===== */

.callout {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-4) var(--space-5);
    margin-bottom: var(--space-5);
}

.callout-label {
    display: block;
    font-weight: 600;
    font-size: 0.85rem;
    margin-bottom: var(--space-2);
}

.callout p {
    font-size: 0.925rem;
    margin-bottom: 0;
}

.callout-tip {
    border-color: rgba(46, 125, 50, 0.25);
    background: rgba(46, 125, 50, 0.04);
}

.callout-tip .callout-label { color: var(--color-success); }

.callout-info {
    border-color: rgba(31, 95, 191, 0.25);
    background: rgba(31, 95, 191, 0.04);
}

.callout-info .callout-label { color: var(--color-info); }

.callout-warning {
    border-color: rgba(178, 106, 0, 0.25);
    background: rgba(178, 106, 0, 0.04);
}

.callout-warning .callout-label { color: var(--color-warning); }

.callout-quote {
    border-left: 3px solid var(--color-sun);
    background: rgba(255, 219, 128, 0.06);
}

.callout-quote p {
    font-style: italic;
}


/* ===== CTA BLOCK ===== */

.cta-block {
    background: rgba(255, 219, 128, 0.1);
    border: 1px solid rgba(255, 219, 128, 0.4);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    margin-top: var(--space-8);
    margin-bottom: var(--space-8);
    text-align: center;
}

.cta-block h3 {
    margin-bottom: var(--space-3);
}

.cta-block p {
    max-width: 50ch;
    margin-left: auto;
    margin-right: auto;
    margin-bottom: var(--space-5);
    color: rgba(43, 43, 43, 0.75);
}

.cta-block .btn {
    margin-top: var(--space-2);
}


/* ===== FAQ ===== */

.faq-section {
    margin-top: var(--space-8);
    padding-top: var(--space-8);
    border-top: 1px solid var(--color-divider);
}

.faq-section h2 {
    margin-bottom: var(--space-5);
}

.faq-item {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-3);
    overflow: hidden;
}

.faq-item summary {
    padding: var(--space-4) var(--space-5);
    font-weight: 600;
    font-size: 0.925rem;
    cursor: pointer;
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.faq-item summary::-webkit-details-marker {
    display: none;
}

.faq-item summary::after {
    content: "+";
    font-size: 1.25rem;
    font-weight: 400;
    color: rgba(43, 43, 43, 0.4);
    transition: transform var(--dur-fast) var(--ease-standard);
}

.faq-item[open] summary::after {
    content: "−";
}

.faq-answer {
    padding: 0 var(--space-5) var(--space-5);
    font-size: 0.925rem;
    color: rgba(43, 43, 43, 0.75);
}

.faq-answer p {
    margin-bottom: var(--space-3);
}


/* ===== POST NAVIGATION ===== */

.post-nav {
    border-top: 1px solid var(--color-divider);
    padding: var(--space-6) 0;
}

.post-nav .container {
    display: flex;
    justify-content: space-between;
}

.post-nav-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    font-size: 0.925rem;
    font-weight: 500;
    text-decoration: none;
}

.post-nav-next {
    margin-left: auto;
}


/* ===== RELATED POSTS ===== */

.related-posts {
    padding-top: var(--space-9);
    padding-bottom: var(--space-8);
    background: rgba(165, 184, 184, 0.06);
    border-top: 1px solid var(--color-divider);
}

.related-posts h2 {
    margin-bottom: var(--space-5);
}


/* ===== LANDING PAGE ===== */

.landing-page .lp-section {
    padding-top: var(--space-10);
    padding-bottom: var(--space-10);
}

.landing-page .lp-hero {
    padding-top: var(--space-11);
    padding-bottom: var(--space-10);
    text-align: center;
}

.landing-page .lp-hero h1 {
    max-width: 20ch;
    margin-left: auto;
    margin-right: auto;
    margin-bottom: var(--space-4);
}


/* ===== FORMS ===== */

.contact-form {
    margin-top: var(--space-5);
}

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

.form-group label {
    display: block;
    font-weight: 500;
    font-size: 0.925rem;
    margin-bottom: var(--space-2);
}

.form-group input,
.form-group textarea {
    width: 100%;
    height: 44px;
    padding: var(--space-3) var(--space-4);
    font-family: var(--font-body);
    font-size: 1rem;
    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius-sm);
    background: var(--color-paper);
    color: var(--color-ink);
    transition: border-color var(--dur-fast) var(--ease-standard),
                box-shadow var(--dur-fast) var(--ease-standard);
}

.form-group textarea {
    height: auto;
    resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-sun);
    box-shadow: 0 0 0 3px rgba(255, 219, 128, 0.3);
}

.contact-form .btn {
    margin-top: var(--space-3);
}


/* ===== ALERTS ===== */

.alert {
    border-radius: var(--radius-md);
    padding: var(--space-4) var(--space-5);
    margin-bottom: var(--space-5);
}

.alert p {
    margin-bottom: var(--space-2);
    font-size: 0.925rem;
}

.alert p:last-child {
    margin-bottom: 0;
}

.alert-success {
    background: rgba(46, 125, 50, 0.06);
    border: 1px solid rgba(46, 125, 50, 0.25);
    color: var(--color-success);
}

.alert-error {
    background: rgba(176, 0, 32, 0.06);
    border: 1px solid rgba(176, 0, 32, 0.25);
    color: var(--color-danger);
}


/* ===== EMPTY STATE ===== */

.empty-state {
    text-align: center;
    padding: var(--space-10) var(--space-5);
    color: rgba(43, 43, 43, 0.5);
}


/* ===== CHIPS ===== */

.chip {
    display: inline-block;
    padding: var(--space-1) var(--space-3);
    font-size: 0.85rem;
    background: rgba(165, 184, 184, 0.25);
    color: var(--color-ink);
    border: 1px solid var(--color-border);
    border-radius: 999px;
}


/* ===== ACCESSIBILITY ===== */

:focus-visible {
    outline: 2px solid var(--color-sun);
    outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}


/* ===== RESPONSIVE ===== */

@media (max-width: 768px) {
    .hero {
        padding-top: var(--space-9);
        padding-bottom: var(--space-8);
    }

    .hero-sm {
        padding-top: var(--space-8);
        padding-bottom: var(--space-6);
    }

    .section {
        padding-top: var(--space-8);
        padding-bottom: var(--space-8);
    }

    .nav-toggle {
        display: block;
    }

    .nav-list {
        display: none;
        position: absolute;
        top: 100%;
        right: 0;
        left: 0;
        flex-direction: column;
        background: var(--color-paper);
        border-bottom: 1px solid var(--color-border);
        padding: var(--space-4) var(--space-5);
        gap: var(--space-3);
    }

    .nav-list.is-open {
        display: flex;
    }

    .site-header {
        position: relative;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--space-6);
    }

    .card-grid {
        grid-template-columns: 1fr;
    }

    .post-nav .container {
        flex-direction: column;
        gap: var(--space-4);
    }

    .post-nav-next {
        margin-left: 0;
    }

    .landing-page .lp-section {
        padding-top: var(--space-8);
        padding-bottom: var(--space-8);
    }
}