/*
 * Colors sampled directly from the book cover (assets/images/cover-light.png):
 * the navy title, the coral Laravel-mark red, and the schematic blue used
 * for the circuit-line illustration. Reusing them is what makes the site
 * read as the same object as the cover, not a generic template.
 */
:root {
    --navy: #1c2f52;
    --navy-dark: #101d38;
    --coral: #e2543f;
    --coral-dark: #c23f2c;
    --circuit: #3d5a8a;
    --paper: #faf8f6;
    --ink: #252525;
    --muted: #606c76;
    --white: #ffffff;

    --font-serif: "Libertine", "Iowan Old Style", "Palatino Linotype", Georgia, serif;
    --font-display: "Archivo Black", "Arial Black", sans-serif;

    --max-width: 72rem;
}

/*
 * Linux Libertine is the same body typeface used to typeset the book
 * itself (see laravel-in-production/assets/fonts) - reusing it here keeps
 * the site and the book feeling like the same object.
 */
@font-face {
    font-family: "Libertine";
    src: url("../assets/fonts/LinLibertine_R.ttf") format("truetype");
    font-weight: 400;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: "Libertine";
    src: url("../assets/fonts/LinLibertine_RB.ttf") format("truetype");
    font-weight: 700;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: "Libertine";
    src: url("../assets/fonts/LinLibertine_RI.ttf") format("truetype");
    font-weight: 400;
    font-style: italic;
    font-display: swap;
}

@font-face {
    font-family: "Libertine";
    src: url("../assets/fonts/LinLibertine_RBI.ttf") format("truetype");
    font-weight: 700;
    font-style: italic;
    font-display: swap;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: var(--font-serif);
    background-color: var(--paper);
    color: var(--ink);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

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

a {
    color: inherit;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

.display {
    font-family: var(--font-display);
    letter-spacing: 0.01em;
    color: var(--navy);
}

.eyebrow {
    display: inline-block;
    font-family: var(--font-display);
    font-size: 0.7rem;
    letter-spacing: 0.08em;
    color: var(--coral);
}

/* ---------- Buttons ---------- */

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    border-radius: 999px;
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    font-family: var(--font-serif);
    text-decoration: none;
    border: 1px solid transparent;
    cursor: pointer;
    transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

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

.btn-primary:hover {
    background-color: var(--coral-dark);
}

.btn-secondary {
    background-color: var(--white);
    border-color: rgba(28, 47, 82, 0.2);
    color: var(--navy);
}

.btn-secondary:hover {
    border-color: rgba(28, 47, 82, 0.45);
}

.btn-dark {
    background-color: var(--navy);
    color: var(--white);
}

.btn-dark:hover {
    background-color: var(--navy-dark);
}

/* ---------- Nav ---------- */

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background-color: rgba(250, 248, 246, 0.92);
    backdrop-filter: blur(6px);
    border-bottom: 1px solid rgba(28, 47, 82, 0.1);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 1rem;
    padding-bottom: 1rem;
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    text-decoration: none;
}

.brand span {
    font-family: var(--font-display);
    font-size: 0.85rem;
    color: var(--navy);
    letter-spacing: 0.02em;
}

.nav-links {
    display: none;
    align-items: center;
    gap: 1.75rem;
    font-size: 0.9rem;
    font-weight: 600;
    color: rgba(28, 47, 82, 0.8);
}

.nav-links a {
    text-decoration: none;
}

.nav-links a:hover {
    color: var(--coral);
}

/* Mobile dropdown panel, toggled open by .nav-toggle via js/main.js */
.nav-links.is-open {
    display: flex;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background-color: var(--paper);
    border-bottom: 1px solid rgba(28, 47, 82, 0.1);
    box-shadow: 0 12px 24px -16px rgba(28, 47, 82, 0.3);
    padding: 0.25rem 1.5rem 1rem;
}

.nav-links.is-open a {
    padding: 0.85rem 0;
    border-bottom: 1px solid rgba(28, 47, 82, 0.08);
}

.nav-links.is-open a:last-child {
    border-bottom: none;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Tightened CTA so it stays on one line alongside the hamburger on narrow
   screens; reverts to the normal .btn sizing once the hamburger disappears. */
@media (max-width: 767px) {
    .nav-right .btn {
        white-space: nowrap;
        padding: 0.6rem 1rem;
        font-size: 0.85rem;
    }
}

/* Three-line hamburger icon; morphs into an X via .nav-toggle[aria-expanded="true"] */
.nav-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 2.25rem;
    height: 2.25rem;
    padding: 0;
    border: none;
    background: none;
    cursor: pointer;
}

.nav-toggle span {
    display: block;
    width: 1.25rem;
    height: 2px;
    background-color: var(--navy);
    border-radius: 2px;
    transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
    opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

@media (min-width: 768px) {
    .nav-links {
        display: flex;
    }

    .nav-toggle {
        display: none;
    }
}

/* ---------- Hero ---------- */

.hero {
    position: relative;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(var(--circuit) 1px, transparent 1px),
        linear-gradient(90deg, var(--circuit) 1px, transparent 1px);
    background-size: 48px 48px;
    opacity: 0.06;
}

.hero-inner {
    position: relative;
    display: grid;
    gap: 3rem;
    padding-top: 4rem;
    padding-bottom: 5rem;
    align-items: center;
}

@media (min-width: 1024px) {
    .hero-inner {
        grid-template-columns: 1fr 1fr;
        padding-top: 6rem;
        padding-bottom: 7rem;
    }
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    border: 1px solid rgba(226, 84, 63, 0.3);
    background-color: rgba(226, 84, 63, 0.1);
    color: var(--coral-dark);
    border-radius: 999px;
    padding: 0.4rem 1rem;
    font-size: 0.75rem;
    font-weight: 600;
}

.hero h1 {
    font-size: 2.5rem;
    line-height: 1.1;
    margin: 1.25rem 0 0;
}

@media (min-width: 640px) {
    .hero h1 {
        font-size: 3rem;
    }
}

.hero .subtitle {
    margin: 0.75rem 0 0;
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--muted);
}

.hero p.lede {
    margin: 1.5rem 0 0;
    max-width: 32rem;
    font-size: 1.15rem;
}

.hero .byline {
    margin: 1rem 0 0;
    font-size: 0.9rem;
    color: var(--muted);
}

.hero .format-pills {
    margin-top: 1rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.format-pill {
    display: inline-flex;
    align-items: center;
    border: 1px solid rgba(28, 47, 82, 0.15);
    background-color: rgba(28, 47, 82, 0.04);
    color: var(--navy);
    border-radius: 999px;
    padding: 0.3rem 0.85rem;
    font-size: 0.7rem;
    font-weight: 600;
}

.hero .cta-row {
    margin-top: 1.5rem;
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.hero-cover {
    position: relative;
    max-width: 24rem;
    margin: 0 auto;
}

.hero-cover::before {
    content: "";
    position: absolute;
    inset: -1.5rem;
    z-index: -1;
    border-radius: 2rem;
    background-color: rgba(28, 47, 82, 0.06);
    filter: blur(24px);
}

/*
 * The book's trim size is US Letter (8.5in x 11in - see the `document` and
 * `cover.dimensions` settings in laravel-in-production/ibis.php), which is
 * very slightly different from cover-light.png's own pixel dimensions.
 * Forcing this exact 8.5:11 ratio (rather than the image's native ratio)
 * keeps the cover on the site the same shape as the actual printed/PDF
 * cover; object-fit: cover absorbs the tiny difference as an imperceptible
 * center-crop instead of a visible stretch.
 */
.hero-cover img {
    width: 100%;
    height: auto;
    aspect-ratio: 8.5 / 11;
    object-fit: cover;
    border-radius: 0.5rem;
    box-shadow: 0 25px 50px -12px rgba(16, 29, 56, 0.35);
    border: 1px solid rgba(28, 47, 82, 0.1);
}

/* ---------- Generic sections ---------- */

section {
    border-top: 1px solid rgba(28, 47, 82, 0.1);
}

.section-white {
    background-color: var(--white);
}

.section-navy {
    background-color: var(--navy);
    color: rgba(255, 255, 255, 0.85);
}

.section-pad {
    padding-top: 4rem;
    padding-bottom: 4rem;
}

@media (min-width: 640px) {
    .section-pad {
        padding-top: 5rem;
        padding-bottom: 5rem;
    }
}

.section-heading {
    max-width: 40rem;
}

.section-heading h2 {
    font-size: 1.5rem;
    margin: 0.5rem 0 0;
}

@media (min-width: 640px) {
    .section-heading h2 {
        font-size: 1.875rem;
    }
}

.section-heading p {
    margin-top: 1rem;
    color: var(--muted);
}

.section-navy .section-heading p,
.section-navy .eyebrow {
    color: rgba(255, 255, 255, 0.7);
}

.section-navy .section-heading h2 {
    color: var(--white);
}

.section-navy .eyebrow {
    color: rgba(255, 255, 255, 0.6);
}

/* ---------- "Not a tutorial" comparison ---------- */

.compare-grid {
    display: grid;
    gap: 2rem;
    margin-top: 2.5rem;
}

@media (min-width: 640px) {
    .compare-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.compare-card {
    border-radius: 1rem;
    padding: 1.5rem;
    border: 1px solid rgba(28, 47, 82, 0.1);
}

.compare-card.accent {
    border-color: rgba(226, 84, 63, 0.2);
    background-color: rgba(226, 84, 63, 0.05);
}

.compare-card p.label {
    font-family: var(--font-display);
    font-size: 0.7rem;
    letter-spacing: 0.06em;
    color: var(--muted);
    margin: 0;
}

.compare-card.accent p.label {
    color: var(--coral-dark);
}

.compare-card ul {
    margin: 1rem 0 0;
    padding: 0;
    list-style: none;
    font-size: 0.9rem;
    color: var(--muted);
}

.compare-card.accent ul {
    color: var(--ink);
}

.compare-card li {
    margin-bottom: 0.65rem;
}

/* ---------- Part cards ---------- */

.parts-grid {
    display: grid;
    gap: 1.25rem;
    margin-top: 2.5rem;
}

@media (min-width: 640px) {
    .parts-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (min-width: 1024px) {
    .parts-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.part-card {
    display: flex;
    flex-direction: column;
    border-radius: 1rem;
    border: 1px solid rgba(28, 47, 82, 0.1);
    background-color: var(--white);
    padding: 1.5rem;
    box-shadow: 0 1px 2px rgba(16, 29, 56, 0.04);
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.part-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(16, 29, 56, 0.08);
}

.part-card .part-top {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 0.75rem;
}

.part-card .part-number {
    font-family: var(--font-display);
    font-size: 0.7rem;
    color: var(--coral);
}

.part-card .part-chapters {
    border-radius: 999px;
    background-color: rgba(28, 47, 82, 0.05);
    padding: 0.25rem 0.65rem;
    font-size: 0.7rem;
    font-weight: 600;
    color: rgba(28, 47, 82, 0.6);
    white-space: nowrap;
}

.part-card h3 {
    margin: 0.75rem 0 0;
    font-size: 1.1rem;
    color: var(--navy);
}

.part-card .part-subtitle {
    margin: 0.15rem 0 0;
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--muted);
}

.part-card p.desc {
    margin-top: 0.75rem;
    font-size: 0.9rem;
    line-height: 1.55;
    color: var(--muted);
}

/* ---------- Table of contents ---------- */

.toc-grid {
    display: grid;
    gap: 2rem 3rem;
    margin-top: 2.5rem;
}

@media (min-width: 768px) {
    .toc-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.toc-part {
    align-self: start;
}

.toc-part summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    list-style: none;
    cursor: pointer;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--coral);
    user-select: none;
}

.toc-part summary::-webkit-details-marker {
    display: none;
}

.toc-part summary::after {
    content: "+";
    flex-shrink: 0;
    width: 1.5rem;
    height: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background-color: rgba(28, 47, 82, 0.06);
    color: var(--navy);
    font-size: 1rem;
    font-weight: 700;
    line-height: 1;
    transition: transform 0.15s ease, background-color 0.15s ease;
}

.toc-part[open] summary::after {
    content: "\2212";
}

.toc-part summary:hover::after {
    background-color: rgba(28, 47, 82, 0.12);
}

.toc-part-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--navy);
}

.toc-part-count {
    flex: 1 1 auto;
    text-align: right;
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--muted);
}

.toc-part ol {
    list-style: none;
    margin: 0.25rem 0 0;
    padding: 0;
}

.toc-part li {
    display: flex;
    align-items: baseline;
    gap: 0.75rem;
    padding: 0.5rem 0;
    border-bottom: 1px solid rgba(28, 47, 82, 0.08);
    font-size: 0.9rem;
    line-height: 1.4;
    color: var(--ink);
}

.toc-part li:last-child {
    border-bottom: none;
}

.toc-num {
    flex-shrink: 0;
    min-width: 1.5rem;
    font-family: var(--font-display);
    font-size: 0.75rem;
    color: var(--coral);
}

/* ---------- Sample section ---------- */

.sample-grid {
    display: grid;
    gap: 2.5rem;
    align-items: center;
}

@media (min-width: 1024px) {
    .sample-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.sample-download-row {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 2rem;
}

.sample-box {
    border-radius: 1rem;
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 1.5rem;
}

.sample-box p.label {
    font-family: var(--font-display);
    font-size: 0.7rem;
    letter-spacing: 0.05em;
    color: rgba(255, 255, 255, 0.5);
    margin: 0;
}

.sample-box ul {
    margin: 1rem 0 0;
    padding: 0;
    list-style: none;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.85);
}

.sample-box li {
    margin-bottom: 0.65rem;
}

/* ---------- Notify / email form ---------- */

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

.notify-section .section-heading {
    margin: 0 auto;
    text-align: center;
}

.notify-form {
    margin-top: 2rem;
    display: flex;
    justify-content: center;
}

/*
 * The Kit form widget itself (injected by the <script> embed in the
 * #notify section of index.html) renders its own markup/styles, so there's
 * little to style here. One exception: Kit's form sets max-width but no
 * width, so as a flex child it shrinks to its content size instead of the
 * comfortable width its own responsive layout assumes - widen it here
 * (the #notify id gives this enough specificity to win over Kit's
 * `.formkit-form[data-uid="..."]` rule regardless of load order). For
 * anything else - colors, copy, fields - use Kit's Form builder instead.
 */
#notify .formkit-form {
    width: 100%;
    max-width: 44rem;
}

/* ---------- About the author ---------- */

.author-grid {
    display: grid;
    gap: 2rem;
    margin-top: 1.5rem;
}

@media (min-width: 1024px) {
    .author-grid {
        grid-template-columns: auto 1fr;
        align-items: flex-start;
    }
}

.author-grid img {
    width: 64px;
    height: 64px;
    border-radius: 999px;
    border: 1px solid rgba(28, 47, 82, 0.1);
}

.author-grid h2 {
    margin: 0;
    font-size: 1.25rem;
    color: var(--navy);
}

.author-grid p {
    margin-top: 0.75rem;
    max-width: 40rem;
    color: var(--muted);
}

.author-grid .author-link {
    display: inline-block;
    margin-top: 1rem;
    font-weight: 700;
    color: var(--coral-dark);
    text-decoration: none;
}

.author-grid .author-link:hover {
    text-decoration: underline;
}

/* ---------- Footer ---------- */

.site-footer {
    background-color: var(--navy);
    color: rgba(255, 255, 255, 0.7);
}

.footer-top {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    align-items: center;
    justify-content: space-between;
    padding-top: 2.5rem;
    padding-bottom: 2.5rem;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.footer-brand p {
    margin: 0;
}

.footer-brand .brand-title {
    font-family: var(--font-display);
    font-size: 0.75rem;
    color: var(--white);
    letter-spacing: 0.02em;
}

.footer-brand .brand-byline {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.5);
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    font-size: 0.9rem;
}

.footer-links a {
    text-decoration: none;
}

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

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    margin: 0;
    padding: 1rem 0;
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.4);
}