/* ==========================================================================
   Portfolio styles
   - Warm palette, sans-serif, 8px spacing rhythm
   - Edit the variables in :root to retheme the whole site
   ========================================================================== */

:root {
  /* Color */
  --color-bg: #F6F0E8;          /* cream background */
  --color-surface: #EEE5D9;     /* slightly darker cream for cards, tags, placeholders */
  --color-border: #E2D6C8;
  --color-text: #2B2622;        /* warm charcoal */
  --color-text-muted: #6B625A;  /* secondary text (5.3:1 on bg, 4.8:1 on surface) */
  --color-accent: #C1673B;      /* terracotta — decorative use: rules, hovers, highlights */
  --color-accent-strong: #A4522B; /* darker terracotta — used for link text & buttons so they pass WCAG AA (4.9:1) */

  /* Type */
  --font-sans: "DM Sans", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif; /* body & UI */
  --font-serif: "Fraunces", Georgia, "Times New Roman", serif; /* page titles & section headings */
  --text-sm: 14px;
  --text-base: 16px;
  --text-lg: 22px;   /* subheads */
  --text-xl: 28px;   /* section headings */
  --text-2xl: 40px;  /* hero / page title */
  --leading-tight: 1.2;
  --leading-body: 1.6;

  /* Spacing — multiples of 8px */
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-5: 40px;
  --space-6: 48px;
  --space-8: 64px;
  --space-12: 96px;

  /* Layout */
  --width-text: 720px;   /* single column: headings, images */
  --measure: 36em;       /* max line length for running text (~75 characters) */
  --width-wide: 1120px;  /* grids, header, footer */
  --radius: 8px;

  /* Motion */
  --duration: 200ms;
  --ease: ease;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1); /* soft landing for the scroll reveal */
}

/* Reset-ish
   ========================================================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  scrollbar-color: var(--color-border) transparent;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  -webkit-font-smoothing: antialiased;
}

p,
li,
dd,
figcaption {
  text-wrap: pretty;
}

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

h1, h2, h3, p, ul, ol, figure, dl, dd {
  margin: 0;
}

h1, h2, h3 {
  line-height: var(--leading-tight);
  text-wrap: balance;
  font-weight: 600;
  letter-spacing: -0.01em;
}

/* Serif for the big titles; h3 and below stay sans */
h1,
h2 {
  font-family: var(--font-serif);
  font-weight: 500;
}

/* Tracking tightens as size grows */
h1 { font-size: var(--text-2xl); letter-spacing: -0.025em; }
h2 { font-size: var(--text-xl); letter-spacing: -0.015em; }
h3 { font-size: var(--text-lg); }

a {
  color: var(--color-accent-strong);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition:
    color var(--duration) var(--ease),
    text-decoration-color var(--duration) var(--ease);
}

a:hover {
  color: var(--color-text);
  text-decoration-color: var(--color-accent);
}

/* Focus: warm accent ring, keyboard only (mouse clicks don't show it) */
:focus-visible {
  outline: 2px solid var(--color-accent-strong);
  outline-offset: 3px;
  border-radius: 2px;
}

::selection {
  background: #F1D5C4;
  color: var(--color-text);
}

/* Accessibility helpers
   ========================================================================== */

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.skip-link {
  position: absolute;
  left: var(--space-2);
  top: -100px;
  padding: var(--space-1) var(--space-2);
  background: var(--color-text);
  color: var(--color-bg);
  border-radius: var(--radius);
  z-index: 10;
}

.skip-link:focus {
  top: var(--space-2);
  color: var(--color-bg);
}

/* Layout containers
   ========================================================================== */

.container {
  width: 100%;
  max-width: var(--width-wide);
  margin: 0 auto;
  padding: 0 var(--space-3);
}

.container--text {
  max-width: calc(var(--width-text) + var(--space-3) * 2);
}

.section {
  padding: var(--space-8) 0;
}

/* Header / nav
   ========================================================================== */

.site-header {
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-border);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.site-name {
  font-weight: 600;
  color: var(--color-text);
  text-decoration: none;
}

.site-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  padding: 0;
  list-style: none;
}

.site-nav a {
  color: var(--color-text);
  text-decoration: none;
  font-size: var(--text-sm);
}

.site-nav a:hover,
.site-nav a[aria-current] {
  color: var(--color-accent-strong);
  text-decoration: underline;
}

/* Buttons
   ========================================================================== */

.button {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  border: 1px solid var(--color-accent-strong);
  border-radius: var(--radius);
  background: var(--color-accent-strong);
  color: #FFFFFF;
  font-size: var(--text-sm);
  font-weight: 500;
  text-decoration: none;
  transition:
    background-color var(--duration) var(--ease),
    border-color var(--duration) var(--ease),
    color var(--duration) var(--ease);
}

.button:hover {
  background: var(--color-text);
  border-color: var(--color-text);
  color: #FFFFFF;
}

/* Home: intro
   ========================================================================== */

.intro {
  padding: var(--space-12) 0 var(--space-8);
}

.intro .container {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.intro__photo {
  flex-shrink: 0;
  width: 160px;
  height: 160px;
  border-radius: 50%;
  object-fit: cover;
  background: var(--color-surface);
}

.intro__statement {
  max-width: 640px;
  margin-top: var(--space-2);
  color: var(--color-text-muted);
  font-size: var(--text-lg);
  line-height: 1.4;
}

.intro__availability {
  margin-top: var(--space-2);
  color: var(--color-text);
  font-weight: 500;
}

/* Home: project grid
   ========================================================================== */

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

.project-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
  padding: 0;
  list-style: none;
}

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.card__image {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: var(--radius);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  transition:
    transform var(--duration) var(--ease),
    border-color var(--duration) var(--ease);
}

.card__body {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding-top: var(--space-2);
}

.card__title {
  font-size: var(--text-lg);
}

/* Whole card is clickable via the title link's pseudo-element */
.card__title a {
  color: var(--color-text);
  text-decoration: none;
}

.card__title a::after {
  content: "";
  position: absolute;
  inset: 0;
}

.card:hover .card__title a {
  color: var(--color-accent-strong);
}

/* Only the image scales, so the text below stays crisp */
.card:hover .card__image {
  transform: scale(1.02);
  border-color: var(--color-accent);
}

/* Keyboard focus rings the whole card, not just the title text */
@supports selector(:has(*)) {
  .card__title a:focus-visible {
    outline: none;
  }

  .card:has(.card__title a:focus-visible) {
    outline: 2px solid var(--color-accent-strong);
    outline-offset: var(--space-1);
    border-radius: var(--radius);
  }

  .card:has(.card__title a:focus-visible) .card__image {
    transform: scale(1.02);
    border-color: var(--color-accent);
  }
}

.card__desc {
  color: var(--color-text-muted);
}

/* Tags
   ========================================================================== */

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  padding: 0;
  margin-top: var(--space-1);
  list-style: none;
}

.tag {
  padding: 0 var(--space-1);
  border-radius: 4px;
  background: var(--color-surface);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  line-height: 24px;
}

/* Home: about
   ========================================================================== */

.about p + p {
  margin-top: var(--space-2);
}

.about .section__title {
  margin-bottom: var(--space-3);
}

/* Case study
   ========================================================================== */

.cs-header {
  padding: var(--space-12) 0 var(--space-6);
}

.cs-header__summary {
  margin-top: var(--space-2);
  color: var(--color-text-muted);
  font-size: var(--text-lg);
  line-height: 1.4;
}

.cs-meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: var(--space-3);
  margin-top: var(--space-5);
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-border);
}

.cs-meta dt {
  margin-bottom: 4px;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

.cs-header__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2) var(--space-3);
  margin-top: var(--space-4);
}

.cs-hero {
  max-width: var(--width-wide);
  margin: 0 auto;
  padding: 0 var(--space-3);
}

.cs-hero img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: var(--radius);
  background: var(--color-surface);
}

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

.cs-section h2 {
  margin-bottom: var(--space-3);
}

.cs-section > p,
.cs-section > ul,
.cs-subsection > p,
.about p {
  max-width: var(--measure);
}

.cs-section p + p,
.cs-section p + ul,
.cs-section ul + p,
.cs-callout + p {
  margin-top: var(--space-2);
}

.cs-section ul {
  padding-left: var(--space-3);
}

.cs-subsection ul {
  max-width: var(--measure);
  margin-top: var(--space-2);
}

.cs-section li + li {
  margin-top: var(--space-1);
}

.cs-subsection {
  margin-top: var(--space-6);
}

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

/* Inline figure — sits in the text column, can break slightly wider on desktop */
.cs-figure {
  margin: var(--space-4) 0;
}

.cs-figure img {
  width: 100%;
  border-radius: var(--radius);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
}

.cs-figure figcaption {
  margin-top: var(--space-1);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

/* Key result / quote: set in the serif, like a pull-quote */
.cs-callout {
  margin: var(--space-4) 0;
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
  border-radius: var(--radius);
  font-family: var(--font-serif);
  font-size: var(--text-lg);
  line-height: 1.4;
  letter-spacing: -0.01em;
}

.cs-footer-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-end;
  gap: var(--space-3);
  margin-top: var(--space-8);
  padding: var(--space-4) 0 var(--space-8);
  border-top: 1px solid var(--color-border);
}

.cs-next {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-left: auto;
  text-align: right;
  text-decoration: none;
}

.cs-next__label {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

.cs-next__title {
  color: var(--color-text);
  font-family: var(--font-serif);
  font-size: var(--text-lg);
  letter-spacing: -0.01em;
  line-height: var(--leading-tight);
  text-decoration: underline;
  text-decoration-color: transparent;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
  transition:
    color var(--duration) var(--ease),
    text-decoration-color var(--duration) var(--ease);
}

.cs-next:hover .cs-next__title {
  color: var(--color-accent-strong);
  text-decoration-color: var(--color-accent);
}

/* Scroll reveal (case study sections)
   Only hidden when <html class="js"> is set AND motion is allowed;
   js/reveal.js adds .is-visible as each section enters the viewport.
   ========================================================================== */

@media (prefers-reduced-motion: no-preference) {
  .js .reveal {
    opacity: 0;
    transform: translateY(var(--space-1));
    transition:
      opacity 600ms var(--ease-out),
      transform 600ms var(--ease-out);
  }

  .js .reveal.is-visible {
    opacity: 1;
    transform: none;
  }
}

/* 404
   ========================================================================== */

.not-found {
  padding: var(--space-12) 0;
}

.not-found p + p {
  margin-top: var(--space-2);
}

.not-found__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  align-items: center;
  margin-top: var(--space-4);
}

/* Footer
   ========================================================================== */

.site-footer {
  margin-top: var(--space-8);
  padding: var(--space-6) 0;
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

.site-footer .container {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-2);
}

.site-footer ul {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  padding: 0;
  list-style: none;
}

/* Responsive
   ========================================================================== */

@media (max-width: 900px) {
  .project-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  :root {
    --text-2xl: 32px;
    --text-xl: 24px;
    --text-lg: 20px;
  }

  .container {
    padding: 0 var(--space-2);
  }

  .cs-hero {
    padding: 0 var(--space-2);
  }

  .intro {
    padding: var(--space-8) 0 var(--space-6);
  }

  .intro .container {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
  }

  .intro__photo {
    width: 112px;
    height: 112px;
  }

  .project-grid {
    grid-template-columns: 1fr;
    gap: var(--space-5);
  }

  .section {
    padding: var(--space-6) 0;
  }

  .cs-header {
    padding: var(--space-8) 0 var(--space-4);
  }

  .cs-section {
    padding-top: var(--space-6);
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    scroll-behavior: auto !important;
    transition: none !important;
  }

  /* Keep the color change on hover, drop the movement */
  .card:hover .card__image,
  .card:has(.card__title a:focus-visible) .card__image {
    transform: none;
  }
}