/*
 * Portfolio stylesheet
 * Tokens and base styles → components → language rules → responsive layouts → motion.
 * Keep component defaults together; reduced-motion overrides remain last.
 */

/* 1. Design tokens — shared colors, spacing, typography, and motion */
:root {
  /* Colors */
  --color-canvas: #f7f7f7;
  --color-surface: #fff;
  --color-surface-subtle: #f0f0f0;
  --color-text: #1a1a1a;
  --color-text-secondary: #545454;
  --color-text-muted: #6b6b6b;
  --color-border: #e3e3e3;
  --color-border-control: #858585;
  --color-action: #1a1a1a;
  --color-action-hover: #303030;
  --color-on-action: #fff;
  --color-focus: #1a1a1a;
  --color-error: #b42318;
  --color-success: #216e39;

  /* Spacing */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;
  --space-24: 96px;
  --space-32: 128px;

  /* Shape and elevation */
  --radius-small: 12px;
  --radius-card: 24px;
  --radius-pill: 999px;
  --shadow-soft: 0 8px 24px rgb(0 0 0 / 6%);
  --shadow-control: 0 4px 12px rgb(0 0 0 / 8%);
  --shadow-hover: 0 12px 28px rgb(0 0 0 / 10%);

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-arabic: "Thmanyah Sans", sans-serif;
  --font-hero: clamp(4rem, 8vw, 7rem);
  --font-heading: clamp(2rem, 4vw, 3.25rem);
  --font-card: clamp(1.375rem, 2vw, 1.5rem);
  --font-lead: clamp(1.125rem, 2vw, 1.375rem);
  --font-body: clamp(1rem, 1.4vw, 1.125rem);
  --font-meta: 0.875rem;

  /* Layout */
  --content-max: 1120px;
  --reading-max: 720px;
  --gutter: 24px;
  --section-space: 48px;

  /* Motion and layers */
  --duration-fast: 160ms;
  --duration-ui: 200ms;
  --duration-reveal: 400ms;
  --ease-ui: cubic-bezier(0.2, 0.8, 0.2, 1);
  --z-header: 20;
  --z-status: 60;
}

/* 2. Local fonts */
@font-face {
  font-family: "Thmanyah Sans";
  src: url("../assets/font/thmanyahsans/woff2/thmanyahsans-Regular.woff2")
    format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Thmanyah Sans";
  src: url("../assets/font/thmanyahsans/woff2/thmanyahsans-Medium.woff2")
    format("woff2");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Thmanyah Sans";
  src: url("../assets/font/thmanyahsans/woff2/thmanyahsans-Bold.woff2")
    format("woff2");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

/* 3. Base elements and accessibility */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 112px;
}

body {
  margin: 0;
  background: var(--color-canvas);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: var(--font-body);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

:lang(ar) {
  font-family: var(--font-arabic);
  letter-spacing: normal;
}

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

h1,
h2,
h3 {
  line-height: 1.5;
  font-weight: 700;
}

h2 {
  font-size: var(--font-heading);
  letter-spacing: -0.045em;
}

h3 {
  font-size: var(--font-card);
  letter-spacing: -0.025em;
}

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

button,
input,
textarea {
  font: inherit;
}

button,
summary {
  cursor: pointer;
}

button {
  color: inherit;
}

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

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

:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 4px;
}

[hidden] {
  display: none !important;
}

/* 4. Layout and shared utilities */
.container {
  width: min(calc(100% - var(--gutter) * 2), var(--content-max));
  margin-inline: auto;
}

.section {
  padding-block: var(--section-space);
  scroll-margin-top: var(--space-8);
}

.section-bordered {
  border-top: 1px solid var(--color-border);
}

.metadata {
  font-size: var(--font-meta);
  color: var(--color-text-muted);
  line-height: 1.6;
}

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

.skip-link {
  position: fixed;
  top: var(--space-3);
  left: var(--space-4);
  z-index: var(--z-status);
  padding: var(--space-3) var(--space-6);
  background: var(--color-text);
  color: var(--color-surface);
  transform: translateY(-200%);
  border-radius: var(--radius-pill);
}

.skip-link:focus {
  transform: translateY(0);
}

.page-frame {
  max-width: 1280px;
  margin-inline: auto;
  border-inline: 1px solid var(--color-border);
}

/* Allow the shared disclosure height animation to collapse fully. */
details > div {
  min-height: 0;
}

/* 5. Header, navigation, and language switch */
.site-header {
  position: fixed;
  z-index: var(--z-header);
  top: var(--space-6);
  left: 50%;
  transform: translateX(-50%);
  width: min(calc(100% - var(--gutter) * 2), 784px);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.header-bar {
  position: relative;
  flex: 1;
  min-width: 0;
  padding: var(--space-2);
  padding-inline-start: var(--space-3);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  background: rgb(255 255 255 / 96%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-soft);
}

.identity {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  min-height: 44px;
  padding-inline-end: var(--space-3);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.brand-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  flex: 0 0 40px;
  overflow: hidden;
  background: var(--color-text);
  border-radius: var(--radius-small);
}

/* Transparent margins in the supplied PNGs require a larger image canvas. */
.brand-mark img {
  width: 72px;
  height: 72px;
  max-width: none;
  flex-shrink: 0;
}

.brand-mark-light {
  background: transparent;
}

nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

nav a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  min-height: 44px;
  padding: var(--space-2) var(--space-5);
  border-radius: var(--radius-pill);
  font-size: var(--font-meta);
  font-weight: 500;
  transition: background var(--duration-fast);
}

nav a:hover,
nav a[aria-current="location"] {
  background: var(--color-surface-subtle);
}

nav .nav-contact {
  background: var(--color-text);
  color: var(--color-surface);
  margin-inline-start: var(--space-2);
}

nav .nav-contact:hover,
nav .nav-contact[aria-current="location"] {
  background: var(--color-action-hover);
}

.menu-toggle {
  border: 0;
  background: var(--color-surface-subtle);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-pill);
  min-height: 44px;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--font-meta);
}

.menu-lines,
.menu-lines::after {
  display: block;
  width: 16px;
  height: 1px;
  background: currentColor;
}

.menu-lines::after {
  content: "";
  transform: translateY(5px);
}

.language-switch {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  flex: 0 0 52px;
  border: 1px solid var(--color-border);
  border-radius: 50%;
  background: var(--color-surface);
  box-shadow: var(--shadow-soft);
  font-size: 16px;
  font-weight: 500;
  line-height: 1;
  transition:
    background var(--duration-ui),
    box-shadow var(--duration-ui);
}

.language-switch:hover {
  background: var(--color-surface-subtle);
}

/* 6. Hero and action buttons */
.hero {
  position: relative;
  isolation: isolate;
  text-align: center;
  padding-top: calc(var(--space-32) + var(--space-10));
  padding-bottom: var(--space-8);
  border-bottom: 1px solid var(--color-border);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0 calc(-1 * var(--gutter));
  background-image: radial-gradient(
    var(--color-border-control) 0.6px,
    transparent 0.6px
  );
  background-size: 18px 18px;
  opacity: 0.16;
  mask-image: linear-gradient(transparent, #000 28%, transparent 90%);
  pointer-events: none;
  z-index: -1;
}

h1 {
  font-size: var(--font-hero);
  letter-spacing: -0.065em;
  line-height: 1.4;
  margin-top: var(--space-3);
}

.hero-role {
  font-size: var(--font-lead);
  letter-spacing: -0.025em;
}

.hero-description {
  max-width: var(--reading-max);
  margin: var(--space-4) auto 0;
  color: var(--color-text-secondary);
}

.action-group {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-3);
  margin-top: var(--space-8);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-6);
  min-height: 52px;
  padding: var(--space-3) var(--space-6);
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.4;
  transition:
    transform var(--duration-ui) var(--ease-ui),
    background var(--duration-ui),
    box-shadow var(--duration-ui);
}

.button-primary {
  color: var(--color-on-action);
  background: var(--color-action);
  box-shadow:
    var(--shadow-control),
    inset 0 1px 0 rgb(255 255 255 / 15%);
}

.button-primary:hover {
  background: var(--color-action-hover);
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.button-secondary {
  background: var(--color-surface);
  border-color: var(--color-border);
}

.button-secondary:hover {
  background: var(--color-surface-subtle);
  transform: translateY(-2px);
}

.button:active {
  transform: translateY(0);
  box-shadow: none;
}

.button:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-3);
  margin-top: var(--space-6);
  color: var(--color-text-muted);
  font-size: 12px;
}

.scroll-cue {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-3);
  margin: var(--space-10) auto 0;
  width: fit-content;
  min-height: 44px;
  font-size: 12px;
  color: var(--color-text-muted);
}

.scroll-line {
  width: 24px;
  height: 1px;
  background: var(--color-border-control);
}

.frame-cross {
  position: absolute;
  bottom: -15px;
  color: var(--color-border-control);
  font-size: 20px;
  font-weight: 300;
}

.frame-cross-start {
  inset-inline-start: -6px;
}

.frame-cross-end {
  inset-inline-end: -6px;
}

.section-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-8);
  margin-bottom: var(--space-12);
}

/* 7. Project cards and disclosures */
.project-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-10);
}

.project {
  min-width: 0;
}

.project-cover {
  position: relative;
  display: block;
  aspect-ratio: 4 / 3;
  border-radius: var(--radius-card);
  overflow: hidden;
  background: var(--color-surface-subtle);
  isolation: isolate;
}

.project-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--duration-reveal) var(--ease-ui);
}

.project-cover:hover img {
  transform: scale(1.02);
}

.project-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-8);
  color: var(--color-on-action);
  background: linear-gradient(transparent 40%, rgb(0 0 0 / 85%) 100%);
}

.project-overlay h3 {
  margin-top: var(--space-1);
}

.project-caption {
  padding-block: var(--space-6) var(--space-5);
}

.project-caption > p {
  color: var(--color-text-secondary);
  font-size: 16px;
  line-height: 1.8;
}

.project-details {
  border-top: 1px solid var(--color-border);
  font-size: var(--font-meta);
  scroll-margin-top: 120px;
}

.project-details summary {
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-3);
  min-height: 52px;
  font-weight: 500;
}

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

.project-details summary span {
  font-size: 22px;
  transition: transform var(--duration-ui);
}

.project-details[open] summary span {
  transform: rotate(45deg);
}

.project-details > div {
  padding: 0;
  color: var(--color-text-secondary);
}

.project-details p + p {
  margin-top: var(--space-3);
}

/* Pseudo-elements preserve inner spacing without padding the animated panel. */
.project-details > div::before {
  content: "";
  display: block;
  height: var(--space-2);
}

.project-details > div::after {
  content: "";
  display: block;
  height: var(--space-4);
}

.project-details.is-closing summary span {
  transform: rotate(0);
}

/* 8. Shared technology and skill tags */
.tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  list-style: none;
  padding: 0;
  margin: var(--space-4) 0 0;
}

.tags li {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  padding: var(--space-1) var(--space-3);
  font-size: var(--font-meta);
  color: var(--color-text-secondary);
  line-height: 1.6;
  position: relative;
  overflow: hidden;
  isolation: isolate;
  transition:
    color var(--duration-ui),
    background var(--duration-ui),
    border-color var(--duration-ui),
    box-shadow var(--duration-ui),
    transform var(--duration-ui) var(--ease-ui);
}

.tags li::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    110deg,
    transparent 25%,
    rgb(255 255 255 / 22%) 50%,
    transparent 75%
  );
  transform: translateX(-140%);
  pointer-events: none;
}

.tags-large li {
  padding: var(--space-2) var(--space-4);
}

/* 9. Text links */
.text-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  min-height: 44px;
  font-size: var(--font-meta);
  font-weight: 500;
}

.text-link:hover {
  text-decoration: underline;
  text-underline-offset: 5px;
}

/* 10. About, experience, and skills */
.about-grid,
.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-10);
}

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

.lead {
  font-size: var(--font-lead);
  line-height: 1.7;
  color: var(--color-text);
  letter-spacing: -0.025em;
  margin-bottom: var(--space-4);
}

.education {
  border-block: 1px solid var(--color-border);
  padding-block: var(--space-6);
  margin-block: var(--space-8);
}

.education > p {
  font-weight: 500;
  color: var(--color-text);
}

.skills h3 {
  font-size: 16px;
  letter-spacing: 0;
  color: var(--color-text);
}

.about-link {
  margin-top: var(--space-5);
}

.about-portrait {
  width: 100%;
  max-width: 360px;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  object-position: center;
  border-radius: var(--radius-card);
  margin-top: var(--space-8);
  background: var(--color-surface-subtle);
}

.about-block {
  margin-top: var(--space-16);
}

.about-block > h3 {
  margin-bottom: var(--space-8);
}

.experience-row {
  display: grid;
  gap: var(--space-4);
  padding-block: var(--space-6);
  border-top: 1px solid var(--color-border);
}

.experience-row h4,
.skill-group h4 {
  margin: 0 0 var(--space-2);
  font-size: var(--font-body);
  line-height: 1.6;
}

.experience-row > p {
  color: var(--color-text-secondary);
  font-size: 16px;
}

.experience-row .text-link {
  display: flex;
  width: fit-content;
}

.skills-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-8);
}

.skill-group {
  min-width: 0;
}

.skill-group .tags li {
  overflow-wrap: anywhere;
}

/* 11. Contact and form feedback */
.contact-intro > p {
  margin-top: var(--space-6);
  color: var(--color-text-secondary);
  max-width: 39ch;
}

.email-contact {
  display: flex;
  gap: var(--space-4);
  align-items: center;
  margin-top: var(--space-8);
  font-size: 16px;
}

.email-contact .metadata {
  display: block;
}

.email-contact a {
  overflow-wrap: anywhere;
}

.email-contact a:hover {
  text-decoration: underline;
  text-underline-offset: 4px;
}

.contact-symbol,
.text-link > span[aria-hidden="true"],
.scroll-cue > span:last-child,
.back-top {
  font-family: var(--font-sans);
}

.contact-symbol,
.back-top {
  width: 44px;
  height: 44px;
  flex: 0 0 44px;
  display: grid;
  place-items: center;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 50%;
  font-size: 24px;
}

.form-note {
  font-size: var(--font-meta);
  line-height: 1.7;
}

.form-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-4);
}

.field {
  margin-bottom: var(--space-5);
}

label {
  display: block;
  font-size: var(--font-meta);
  font-weight: 500;
  margin-bottom: var(--space-2);
}

label span {
  color: var(--color-text-muted);
  font-size: 12px;
  font-weight: 400;
}

input,
textarea {
  display: block;
  width: 100%;
  min-width: 0;
  min-height: 52px;
  padding: var(--space-4);
  border: 1px solid var(--color-border-control);
  border-radius: var(--radius-small);
  color: var(--color-text);
  background: var(--color-surface);
  font-size: 16px;
  line-height: 1.5;
  scroll-margin-block: 120px;
}

textarea {
  min-height: 160px;
  resize: vertical;
}

input::placeholder,
  textarea::placeholder {
  color: var(--color-text-muted);
  opacity: 1;
}

[aria-invalid="true"] {
  border-color: var(--color-error);
}

.field-error {
  color: var(--color-error);
  font-size: var(--font-meta);
  line-height: 1.5;
}

.field-error:not(:empty) {
  margin-top: var(--space-2);
}

.form-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
}

.form-bottom .metadata {
  font-size: 12px;
}

.form-status {
  font-size: var(--font-meta);
  line-height: 1.6;
  margin-top: var(--space-4);
}

.form-status[data-state="valid"] {
  color: var(--color-success);
}

.form-status[data-state="invalid"] {
  color: var(--color-error);
}

/* 12. Footer */
.site-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding-block: var(--space-8);
  border-top: 1px solid var(--color-border);
}

.footer-identity {
  gap: var(--space-2);
  min-height: 44px;
  display: flex;
  align-items: center;
  font-size: 20px;
  letter-spacing: -0.05em;
  font-weight: 700;
}

.site-footer p {
  color: var(--color-text-muted);
  font-size: 12px;
}

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

/* 13. Arabic and right-to-left adjustments */
[dir="rtl"] body {
  font-family: var(--font-arabic);
}

[dir="rtl"] :is(h1, h2, h3, .lead, .hero-role, .identity, .footer-identity) {
  letter-spacing: normal;
}

[dir="rtl"] .hero-role {
  max-width: none;
}

[dir="rtl"] :is(.text-link > span[aria-hidden="true"], .contact-symbol) {
  scale: -1 1;
}

[dir="rtl"] .email-contact a {
  display: inline-block;
  unicode-bidi: isolate;
}

[dir="rtl"] .hero h1 {
  line-height: 1.6;
}

[dir="rtl"] .skip-link {
  left: auto;
  right: var(--space-4);
}

/* 14. Mobile layout and navigation without JavaScript */
@media (max-width: 767px) {
  .site-header {
    top: var(--space-4);
  }

  .header-bar {
    gap: var(--space-1);
  }

  .identity {
    font-size: 16px;
    gap: var(--space-2);
    padding-inline-end: 0;
  }

  .menu-toggle:not([hidden]) {
    display: flex;
  }

  .site-header nav {
    position: absolute;
    transform-origin: top center;
    top: calc(100% + var(--space-2));
    inset-inline: 0;
    padding: var(--space-3);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-soft);
    flex-direction: column;
    align-items: stretch;
  }

  nav .nav-contact {
    margin: 0;
  }

  .hero {
    padding-top: calc(var(--space-20) + var(--space-16));
  }

  h1 {
    font-size: clamp(2.75rem, 10vw, 4rem);
  }

  .hero-role {
    max-width: 26ch;
    margin-inline: auto;
  }

  .hero-description {
    font-size: 16px;
  }

  .desktop-break {
    display: none;
  }

  .action-group {
    gap: var(--space-2);
  }

  .action-group .button {
    padding-inline: var(--space-5);
    gap: var(--space-3);
  }

  .section-heading {
    display: block;
    margin-bottom: var(--space-8);
  }

  .section-heading > a {
    margin-top: var(--space-3);
  }

  .project-overlay {
    padding: var(--space-6);
  }

  .site-footer p {
    flex-basis: 100%;
    order: 3;
  }

  .site-header:not(.is-enhanced) {
    position: relative;
    top: var(--space-4);
    flex-wrap: nowrap;
    border-radius: var(--radius-card);
  }

  .site-header:not(.is-enhanced) nav {
    position: static;
    width: 100%;
    box-shadow: none;
    border: 0;
  }

  .site-header:not(.is-enhanced) + main .hero {
    padding-top: var(--space-16);
  }

  .menu-toggle {
    font-size: 0;
    width: 44px;
    flex: 0 0 44px;
    padding: var(--space-3);
    justify-content: center;
    gap: 0;
  }

  .language-switch {
    width: 44px;
    height: 44px;
    flex-basis: 44px;
  }

  .site-header:not(.is-enhanced) .header-bar {
    flex-wrap: wrap;
    border-radius: var(--radius-card);
  }
}

/* 15. Tablet layout — subgrid keeps neighboring project rows aligned */
@media (min-width: 768px) {
  :root {
    --gutter: 32px;
    --section-space: 64px;
  }

  .project-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-6);
  }

  .project {
    display: grid;
    grid-row: span 4;
    grid-template-rows: subgrid;
    row-gap: 0;
  }

  .project-caption {
    display: grid;
    grid-row: span 2;
    grid-template-rows: subgrid;
    row-gap: 0;
  }

  .project-caption .tags {
    align-content: start;
    align-items: start;
  }

  .about-grid,
  .contact-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-12);
  }

  .about-content {
    padding-top: var(--space-10);
  }

  .experience-row {
    grid-template-columns: minmax(0, 1fr) minmax(0, 2fr);
    gap: var(--space-10);
  }

  .skills-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* 16. Desktop layout */
@media (min-width: 1024px) {
  :root {
    --gutter: 40px;
    --section-space: 96px;
  }

  .form-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .about-grid,
  .contact-grid {
    gap: var(--space-20);
  }
}

/* 17. Animation keyframes — content is visible before JavaScript runs */
@keyframes enter-page {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes scroll-nudge {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(5px);
  }
}

@media (prefers-reduced-motion: no-preference) {
  .motion-ready
    .hero
    > :is(h1, .hero-role, .hero-description, .action-group, .hero-meta) {
    animation: enter-page 700ms var(--ease-ui) both;
  }

  .motion-ready .hero > .hero-role {
    animation-delay: 80ms;
  }

  .motion-ready .hero > .hero-description {
    animation-delay: 160ms;
  }

  .motion-ready .hero > .action-group {
    animation-delay: 240ms;
  }

  .motion-ready .hero > .hero-meta {
    animation-delay: 320ms;
  }

  .motion-ready .scroll-cue > span:last-child {
    animation: scroll-nudge 1.8s var(--ease-ui) 3;
  }

  .text-link > span {
    transition: transform var(--duration-ui) var(--ease-ui);
  }

  .text-link:hover > span {
    transform: translate(2px, -2px);
  }

  .about-portrait {
    transition:
      transform var(--duration-reveal) var(--ease-ui),
      box-shadow var(--duration-reveal);
  }

  .about-portrait:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
  }
}

@media (hover: hover) and (pointer: fine) {
  .tags li:hover {
    background: var(--color-action);
    color: var(--color-on-action);
    border-color: var(--color-action);
    box-shadow: var(--shadow-control);
  }
}

@media (hover: hover) and (pointer: fine) and (prefers-reduced-motion: no-preference) {
  .tags li:hover {
    transform: translateY(-3px);
  }

  .tags li:hover::after {
    transform: translateX(140%);
    transition: transform 550ms var(--ease-ui);
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }

  .button:hover,
  .project-cover:hover img {
    transform: none;
  }
}