/* ---------------------------------------------------------------
   photos.craighooper.xyz
   Structure mirrors Foundations: primitives -> semantic -> classes.
   Class names match the Figma text style names.
   --------------------------------------------------------------- */

@font-face {
  font-family: "FT System";
  src: url("assets/fonts/FTSystem-BlankSemiBold.woff2") format("woff2");
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "KMR Melange Grotesk";
  src: url("assets/fonts/KMRMelangeGrotesk-SemiBold.woff2") format("woff2");
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Parabole";
  src: url("assets/fonts/Parabole-Regular.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

/* --- Primitives ------------------------------------------------ */

:root {
  --scale-base-0: 0px;
  --scale-base-2: 2px;
  --scale-base-4: 4px;
  --scale-base-8: 8px;
  --scale-base-12: 12px;
  --scale-base-16: 16px;
  --scale-base-20: 20px;
  --scale-base-24: 24px;
  --scale-base-32: 32px;
  --scale-base-40: 40px;
  --scale-base-48: 48px;
  --scale-base-64: 64px;
  --scale-base-80: 80px;
  --scale-base-96: 96px;
  --scale-base-128: 128px;
  --scale-base-144: 144px;
  --scale-base-192: 192px;
  --scale-base-320: 320px;
  --scale-base-496: 496px;

  --scale-font-size-12: 12px;
  --scale-font-size-14: 14px;
  --scale-font-size-16: 16px;
  --scale-font-size-24: 24px;
  --scale-font-size-32: 32px;

  --scale-line-height-18: 18px;
  --scale-line-height-20: 20px;
  --scale-line-height-22: 22px;
  --scale-line-height-26: 26px;
  --scale-line-height-34: 34px;

  --scale-letter-spacing-0: 0px;
  --scale-letter-spacing-minus-1: -0.5px;   /* same value as craighooper.xyz */

  --colour-neutral-0: #ffffff;
  --colour-neutral-5: #f2f2f2;
  --colour-neutral-10: #f5f5f5;
  --colour-neutral-20: #cccccc;
  --colour-neutral-70: #4d4d4d;
  --colour-neutral-90: #1a1a1a;
  --colour-neutral-95: #0d0d0d;
  --colour-accent-yellow: #fffbc6;
  --colour-link-blue: #0000ee;
  --colour-link-blue-hover: #0000aa;
  --colour-link-blue-mid: #3a6fd8;
  --colour-link-blue-mid-hover: #2b57ae;

  --font-family-ft-system: "FT System";
  --font-family-parabole: "Parabole";
  --font-family-melange: "KMR Melange Grotesk";

  --font-weight-regular: 400;
  --font-weight-blank-semibold: 600;
}

/* --- Semantic -------------------------------------------------- */

:root {
  --space-0: var(--scale-base-0);
  --space-25: var(--scale-base-2);
  --space-50: var(--scale-base-4);
  --space-100: var(--scale-base-8);
  --space-200: var(--scale-base-12);
  --space-300: var(--scale-base-16);
  --space-400: var(--scale-base-20);
  --space-500: var(--scale-base-24);
  --space-600: var(--scale-base-32);
  --space-700: var(--scale-base-40);
  --space-800: var(--scale-base-48);
  --space-900: var(--scale-base-64);
  --space-1000: var(--scale-base-80);
  --space-1100: var(--scale-base-96);
  --space-1200: var(--scale-base-128);
  --space-1300: var(--scale-base-144);
  --space-1400: var(--scale-base-192);
  --space-1500: var(--scale-base-320);
  --space-1600: var(--scale-base-496);

  --surface-page: var(--colour-neutral-0);
  --surface-raised: var(--colour-neutral-5);
  --surface-accent: var(--colour-accent-yellow);

  --text-primary: var(--colour-neutral-90);
  --text-secondary: var(--colour-neutral-70);
  --text-on-accent: var(--colour-neutral-90);
  --text-on-dark: var(--colour-neutral-0);
  --surface-link: var(--colour-link-blue);
  --surface-link-hover: var(--colour-link-blue-hover);

  --radius-sm: var(--scale-base-8);
  --radius-md: var(--scale-base-12);
  --radius-full: 999px;

  --surface-avatar: var(--surface-page);

  --font-family-heading: var(--font-family-melange);   /* matches craighooper.xyz */
  --font-family-body: var(--font-family-parabole);

  --font-style-heading: var(--font-weight-blank-semibold);
  --font-style-display: var(--font-weight-blank-semibold);
  --font-style-body: var(--font-weight-regular);

  --font-size-12: var(--scale-font-size-12);
  --font-size-14: var(--scale-font-size-14);
  --font-size-16: var(--scale-font-size-16);
  --font-size-24: var(--scale-font-size-24);
  --font-size-32: var(--scale-font-size-32);

  --line-height-18: var(--scale-line-height-18);
  --line-height-20: var(--scale-line-height-20);
  --line-height-22: var(--scale-line-height-22);
  --line-height-26: var(--scale-line-height-26);
  --line-height-34: var(--scale-line-height-34);

  --letter-spacing-display: var(--scale-letter-spacing-minus-1);
  --letter-spacing-body: var(--scale-letter-spacing-0);

  /* Layout, from the desktop artboard */
  --page-margin: var(--space-1100);
  --page-top: var(--space-1100);
  --intro-gap: var(--space-200);
  --section-gap: var(--space-900);
  --grid-col-gap: var(--space-1200);
  --grid-row-gap: var(--space-1200);
  --grid-btn-gap: var(--space-800);
  --btn-pad-y: var(--space-300);
  --btn-pad-x: var(--space-600);
  --btn-radius: var(--radius-md);
  --tile-width-portrait: 270px;
  --tile-width-landscape: 370px;
  --tile-width-square: var(--scale-base-320);
}

/* Dark mode follows the computer's setting, same as craighooper.xyz. */
@media (prefers-color-scheme: dark) {
  :root {
    --surface-page: var(--colour-neutral-90);
    --surface-raised: var(--colour-neutral-95);
    --surface-avatar: var(--colour-neutral-90);
    --text-primary: var(--colour-neutral-10);
    --text-secondary: var(--colour-neutral-20);
    --surface-link: var(--colour-link-blue-mid);
    --surface-link-hover: var(--colour-link-blue-mid-hover);
  }

  /* the avatar is black line art on a transparent background; flip it to white */
  .avatar-btn img {
    filter: invert(1);
  }
}

@media (max-width: 820px) {
  :root {
    --page-margin: var(--space-500);
    --page-top: var(--space-1000);
    --intro-gap: var(--space-100);
    --section-gap: var(--space-600);
    --grid-row-gap: var(--space-600);
    --grid-btn-gap: var(--space-600);
    --btn-pad-y: var(--space-200);
    --btn-pad-x: var(--space-500);
    --btn-radius: var(--radius-sm);
  }
}

/* --- Reset ----------------------------------------------------- */

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

html {
  -webkit-text-size-adjust: 100%;
  color-scheme: light dark;
  background: var(--surface-page);
}

body {
  margin: 0;
  position: relative;
  background: var(--surface-page);
  color: var(--text-primary);
  font-family: var(--font-family-body), system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
p,
ul {
  margin: 0;
}

ul {
  padding: 0;
  list-style: none;
}

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

a {
  color: inherit;
  text-decoration: none;
}

/* --- Text styles ----------------------------------------------- */
/* Class names match the Figma text style names. */

.h1 {
  font-feature-settings: "salt" 1;
  font-family: var(--font-family-heading), "Helvetica Neue", Arial, sans-serif;
  font-weight: var(--font-style-display);
  font-size: var(--font-size-32);
  line-height: var(--line-height-34);
  letter-spacing: var(--letter-spacing-display);
  color: var(--text-primary);
}

.body-md {
  font-family: var(--font-family-body), system-ui, sans-serif;
  font-weight: var(--font-style-body);
  font-size: var(--font-size-16);
  line-height: var(--line-height-22);
  letter-spacing: var(--letter-spacing-body);
}

.body-sm {
  font-family: var(--font-family-body), system-ui, sans-serif;
  font-weight: var(--font-style-body);
  font-size: var(--font-size-14);
  line-height: var(--line-height-20);
  letter-spacing: var(--letter-spacing-body);
}

.body-xs {
  font-family: var(--font-family-body), system-ui, sans-serif;
  font-weight: var(--font-style-body);
  font-size: var(--font-size-12);
  line-height: var(--line-height-18);
  letter-spacing: var(--letter-spacing-body);
}

.secondary {
  color: var(--text-secondary);
}

@media (max-width: 820px) {
  .h1 {
    font-size: var(--font-size-24);
    line-height: var(--line-height-26);
  }

  .body-md {
    font-size: var(--font-size-14);
    line-height: var(--line-height-20);
  }

  .body-sm {
    font-size: var(--font-size-12);
    line-height: var(--line-height-18);
  }
}

/* --- Page ------------------------------------------------------ */

.page {
  padding: var(--page-top) var(--page-margin);
  display: flex;
  flex-direction: column;
  gap: var(--section-gap);
  align-items: flex-start;
}

.intro {
  display: flex;
  flex-direction: column;
  gap: var(--intro-gap);
  max-width: var(--tile-width-landscape);
}

.grid-and-button {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: var(--grid-btn-gap);
  align-items: center;
}

/* --- Grid ------------------------------------------------------ */

.grid {
  width: 100%;
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: flex-start;
  column-gap: var(--grid-col-gap);
  row-gap: var(--grid-row-gap);
}

.tile {
  display: flex;
}

.tile__link {
  display: flex;
  flex-direction: column;
  gap: var(--space-200);
  width: 100%;
}

.tile--portrait {
  width: var(--tile-width-portrait);
}

.tile--landscape {
  width: var(--tile-width-landscape);
}

.tile--square {
  width: var(--tile-width-square);
}

.tile__image {
  width: 100%;
  overflow: hidden;
  background: var(--surface-raised);
}

.tile--portrait .tile__image {
  aspect-ratio: 3 / 4;
}

.tile--square .tile__image {
  aspect-ratio: 1 / 1;
}

.tile--landscape .tile__image {
  aspect-ratio: 4 / 3;
}

.tile__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.tile__meta {
  display: flex;
  flex-direction: column;
  gap: var(--space-100);
}

.tile__tags {
  display: flex;
  flex-wrap: wrap;
  column-gap: var(--space-50);
  row-gap: var(--space-50);
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: var(--space-50) var(--space-200);
  border-radius: var(--radius-sm);
  background: var(--surface-raised);
  color: var(--text-secondary);
}

/* --- Load more ------------------------------------------------- */

.load-more {
  border: 0;
  cursor: pointer;
  padding: var(--btn-pad-y) var(--btn-pad-x);
  border-radius: var(--btn-radius);
  background: var(--surface-accent);
  color: var(--text-on-accent);
}

.load-more[hidden] {
  display: none;
}

/* --- Mobile grid ----------------------------------------------- */

@media (max-width: 820px) {
  .load-more {
    width: 100%;
  }

  .grid {
    flex-direction: column;
    align-items: stretch;
  }

  .tile--portrait,
  .tile--landscape,
  .tile--square {
    width: 100%;
  }
}

/* --- Desktop canvas -------------------------------------------- */
/* The page stops scrolling; the photos sit on a plane you drag around.
   The intro floats above it, in the same spot it holds on the grid page. */

.canvas[hidden] {
  display: none;
}

.is-canvas,
.is-canvas body {
  overflow: hidden;
  overscroll-behavior: none;
}

.is-canvas .grid-and-button {
  display: none;
}

.is-canvas .intro {
  position: fixed;
  top: var(--page-top);
  left: var(--page-margin);
  z-index: 2;
}

.canvas {
  position: fixed;
  inset: 0;
  z-index: 1;
  overflow: hidden;
  background: var(--surface-page);
  cursor: grab;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
}

.canvas.is-dragging {
  cursor: grabbing;
}

.canvas.is-dragging .tile__link {
  cursor: grabbing;
}

.canvas__plane {
  position: absolute;
  top: 0;
  left: 0;
  will-change: transform;
}

.canvas .tile {
  position: absolute;
}

/* While dragging, photos don't react to the pointer passing over them. */
.canvas.is-dragging .tile__link:hover .tile__image img {
  transform: none;
}

/* --- Say hello ------------------------------------------------ */
/* Same button as craighooper.xyz, top right. Corners are smoothed into a
   squircle by assets/squircle.js, also copied from the main site. */

.btn-action {
  position: fixed;
  top: var(--space-200);
  right: var(--space-200);
  z-index: 3;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-100);
  padding: var(--space-200) var(--space-400);
  background: var(--surface-link);
  border-radius: var(--radius-md);
  color: var(--text-on-dark);
  font-family: var(--font-family-body), system-ui, sans-serif;
  font-weight: var(--font-style-body);
  font-feature-settings: "salt" 1, "ss08" 1;
  font-size: var(--font-size-14);
  line-height: var(--line-height-20);
  text-decoration: none;
  white-space: nowrap;
  transition: background-color 0.18s cubic-bezier(0.2, 0.7, 0.2, 1);
}

.btn-action:hover {
  background: var(--surface-link-hover);
}

.btn-action:focus-visible {
  outline: 2px solid var(--text-primary);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  .btn-action { transition: none; }
}

@media (max-width: 820px) {
  /* Scrolls away with the page on mobile, like the avatar. */
  .btn-action {
    position: absolute;
    padding: var(--space-100) var(--space-300);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-12);
    line-height: var(--line-height-18);
  }
}

/* --- Avatar ---------------------------------------------------- */
/* Wrapper holds the position, the button holds the spin, so the two
   never fight over one element. Matches craighooper.xyz. */

.avatar-wrap {
  position: absolute;
  top: var(--space-100);
  left: var(--space-100);
  width: 56px;
  height: 56px;
  z-index: 3;
}

.avatar-btn {
  display: grid;
  place-items: center;
  width: 56px;
  height: 56px;
  padding: 0;
  border: 0;
  border-radius: var(--radius-full);
  background: var(--surface-avatar);
  cursor: pointer;
}

.avatar-btn img {
  display: block;
  width: 48px;
  height: 48px;
  object-fit: cover;
}

@media (hover: hover) and (min-width: 821px) {
  .avatar-btn:hover {
    animation: avatar-spin 0.55s cubic-bezier(0.7, 0, 0.3, 1);
  }
}

@keyframes avatar-spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* --- Photo hover ----------------------------------------------- */

.tile__image img {
  transition: transform 0.3s cubic-bezier(0.2, 0, 0.2, 1);
}

@media (hover: hover) {
  .tile__link:hover .tile__image img,
  .tile__link:focus-visible .tile__image img {
    transform: scale(1.05);
  }
}

@media (prefers-reduced-motion: reduce) {
  .avatar-btn:hover { animation: none; }
  .tile__image img { transition: none; }
  .tile__link:hover .tile__image img { transform: none; }
}

/* --- Focus ----------------------------------------------------- */

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--text-primary);
  outline-offset: 3px;
}