/* ==========================================================================
   Julian Burnley Portfolio
   ========================================================================== */

:root {
  --color-bg: #f7f8fb;
  --color-surface: #ffffff;
  --color-surface-muted: #eef1f6;
  --color-text: #171a22;
  --color-text-muted: #626a78;
  --color-border: #dce1e9;
  --color-primary: #3157d5;
  --color-primary-dark: #203c9e;
  --color-accent: #60d5c8;
  --color-dark: #111722;
  --color-dark-muted: #aeb7c7;
  --color-white: #ffffff;

  --font-body: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", Consolas, monospace;

  --shadow-sm: 0 12px 30px rgba(25, 35, 58, 0.08);
  --shadow-lg: 0 24px 70px rgba(20, 30, 50, 0.14);

  --radius-sm: 0.75rem;
  --radius-md: 1.25rem;
  --radius-lg: 2rem;

  --container: 72rem;
  --section-space: clamp(4.5rem, 9vw, 8rem);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}

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

button,
input,
textarea,
select {
  font: inherit;
}

a {
  color: inherit;
}

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

h1,
h2,
h3 {
  line-height: 1.08;
  letter-spacing: -0.035em;
}

h1 {
  max-width: 12ch;
  margin-bottom: 1.5rem;
  font-size: clamp(3rem, 8vw, 6.75rem);
}

h2 {
  margin-bottom: 1.25rem;
  font-size: clamp(2.15rem, 5vw, 4.25rem);
}

h3 {
  margin-bottom: 0.75rem;
  font-size: clamp(1.2rem, 2vw, 1.65rem);
}

ul {
  margin: 0;
  padding: 0;
}

.container {
  width: min(calc(100% - 2rem), var(--container));
  margin-inline: auto;
}

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

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

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

.section-kicker,
.eyebrow,
.panel-label,
.project-type,
.timeline-label {
  margin-bottom: 1rem;
  color: var(--color-primary);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.section-dark .section-kicker,
.section-dark .project-type {
  color: var(--color-accent);
}

.skip-link {
  position: fixed;
  top: 1rem;
  left: 1rem;
  z-index: 999;
  transform: translateY(-180%);
  padding: 0.75rem 1rem;
  border-radius: 0.5rem;
  background: var(--color-dark);
  color: var(--color-white);
  text-decoration: none;
}

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

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

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid rgba(220, 225, 233, 0.8);
  background: rgba(247, 248, 251, 0.88);
  backdrop-filter: blur(18px);
}

.nav-wrapper {
  min-height: 5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 800;
  text-decoration: none;
}

.brand-mark {
  width: 2.5rem;
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--color-primary);
  color: var(--color-white);
  font-family: var(--font-mono);
  font-size: 0.82rem;
}

.primary-nav ul {
  display: flex;
  align-items: center;
  gap: 1.65rem;
  list-style: none;
}

.primary-nav a {
  color: var(--color-text-muted);
  font-size: 0.93rem;
  font-weight: 600;
  text-decoration: none;
}

.primary-nav a:hover,
.primary-nav a:focus-visible {
  color: var(--color-primary);
}

.primary-nav .nav-cta {
  padding: 0.7rem 1rem;
  border-radius: 999px;
  background: var(--color-text);
  color: var(--color-white);
}

.primary-nav .nav-cta:hover,
.primary-nav .nav-cta:focus-visible {
  background: var(--color-primary);
  color: var(--color-white);
}

.nav-toggle {
  display: none;
  width: 2.75rem;
  height: 2.75rem;
  padding: 0.6rem;
  border: 1px solid var(--color-border);
  border-radius: 0.7rem;
  background: var(--color-surface);
}

.nav-toggle span:not(.sr-only) {
  display: block;
  height: 2px;
  margin-block: 4px;
  background: var(--color-text);
}

/* Hero */
.hero {
  min-height: calc(100vh - 5rem);
  display: grid;
  align-items: center;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(20rem, 0.65fr);
  gap: clamp(3rem, 8vw, 8rem);
  align-items: center;
}

.hero-intro {
  max-width: 42rem;
  color: var(--color-text-muted);
  font-size: clamp(1.05rem, 2vw, 1.3rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-block: 2rem;
}

.button {
  display: inline-flex;
  min-height: 3.15rem;
  align-items: center;
  justify-content: center;
  padding: 0.8rem 1.35rem;
  border: 1px solid transparent;
  border-radius: 999px;
  font-weight: 700;
  text-decoration: none;
  transition: transform 160ms ease, background-color 160ms ease, border-color 160ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

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

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

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

.button-light {
  background: var(--color-white);
  color: var(--color-dark);
}

.hero-details {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 1.5rem;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  list-style: none;
}

.hero-details li {
  position: relative;
}

.hero-details li:not(:last-child)::after {
  content: "•";
  position: absolute;
  right: -0.9rem;
}

.hero-panel {
  padding: clamp(1.5rem, 4vw, 2.5rem);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  box-shadow: var(--shadow-lg);
}

.hero-panel h2 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
}

.focus-list {
  display: grid;
  gap: 1rem;
  list-style: none;
}

.focus-list li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
}

.focus-list li > span,
.ai-process article > span {
  color: var(--color-primary);
  font-family: var(--font-mono);
  font-size: 0.78rem;
}

.focus-list p,
.ai-process p {
  margin: 0.35rem 0 0;
  color: var(--color-text-muted);
  font-size: 0.92rem;
}

/* Shared layouts */
.two-column,
.ai-grid,
.resume-grid {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: clamp(2rem, 8vw, 7rem);
}

.prose {
  max-width: 46rem;
  color: var(--color-text-muted);
  font-size: 1.08rem;
}

.section-heading {
  display: grid;
  grid-template-columns: 1fr minmax(16rem, 30rem);
  gap: 2rem;
  align-items: end;
  margin-bottom: 3rem;
}

.section-heading > p {
  color: var(--color-text-muted);
}

.section-dark .section-heading > p {
  color: var(--color-dark-muted);
}

/* Skills */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

.skill-card {
  min-height: 20rem;
  padding: 1.5rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  box-shadow: var(--shadow-sm);
}

.skill-number {
  margin-bottom: 4rem;
  color: var(--color-primary);
  font-family: var(--font-mono);
  font-size: 0.78rem;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
}

.tag-list li {
  padding: 0.4rem 0.65rem;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  color: var(--color-text-muted);
  font-size: 0.8rem;
}

.section-dark .tag-list li {
  border-color: #354052;
  color: var(--color-dark-muted);
}

/* Projects */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.project-card {
  overflow: hidden;
  border: 1px solid #2a3444;
  border-radius: var(--radius-md);
  background: #171f2c;
}

.project-featured {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
}

.project-visual {
  min-height: 16rem;
  display: grid;
  place-items: end start;
  padding: 1.5rem;
  background:
    linear-gradient(135deg, rgba(49, 87, 213, 0.9), rgba(96, 213, 200, 0.55)),
    radial-gradient(circle at 80% 15%, rgba(255,255,255,0.5), transparent 30%);
}

.project-visual span {
  max-width: 8ch;
  color: var(--color-white);
  font-size: clamp(2rem, 5vw, 4.5rem);
  font-weight: 800;
  letter-spacing: -0.05em;
  line-height: 0.92;
}

.visual-library {
  background: linear-gradient(145deg, #813bea, #3157d5);
}

.visual-commerce {
  background: linear-gradient(145deg, #d66b46, #f4bc54);
}

.visual-ai {
  background: linear-gradient(145deg, #1b8293, #60d5c8);
}

.project-content {
  padding: clamp(1.5rem, 4vw, 2.25rem);
}

.project-content > p:not(.project-type) {
  color: var(--color-dark-muted);
}

.project-links {
  display: flex;
  gap: 1.25rem;
  margin-top: 1.5rem;
}

.project-links a {
  color: var(--color-white);
  font-weight: 700;
  text-underline-offset: 0.3rem;
}

/* AI */
.ai-intro {
  max-width: 38rem;
  color: var(--color-text-muted);
  font-size: 1.1rem;
}

.ai-process {
  display: grid;
}

.ai-process article {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  padding-block: 1.5rem;
  border-top: 1px solid var(--color-border);
}

/* Resume */
.resume-grid .button {
  margin-top: 1rem;
}

.timeline {
  display: grid;
}

.timeline article {
  padding: 0 0 2rem 2rem;
  border-left: 1px solid var(--color-border);
  position: relative;
}

.timeline article::before {
  content: "";
  position: absolute;
  top: 0.25rem;
  left: -0.38rem;
  width: 0.7rem;
  aspect-ratio: 1;
  border-radius: 50%;
  background: var(--color-primary);
}

.timeline article p:last-child {
  color: var(--color-text-muted);
}

/* Contact */
.contact-section {
  background: var(--color-primary);
}

.contact-card {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 3rem;
  align-items: end;
  color: var(--color-white);
}

.contact-card .section-kicker {
  color: var(--color-accent);
}

.contact-card h2 {
  max-width: 12ch;
}

.contact-card p {
  max-width: 42rem;
  color: rgba(255,255,255,0.8);
}

.contact-actions {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1rem;
}

.text-link {
  color: var(--color-white);
  font-weight: 700;
  text-decoration: none;
}

/* Footer */
.site-footer {
  padding-block: 2rem;
  background: var(--color-dark);
  color: var(--color-white);
}

.footer-grid {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 2rem;
}

.footer-brand {
  margin-bottom: 0.75rem;
}

.site-footer p,
.site-footer a {
  color: var(--color-dark-muted);
}

.footer-meta {
  text-align: right;
}

/* Focus */
:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 4px;
}

/* Responsive */
@media (max-width: 900px) {
  .nav-toggle {
    display: block;
  }

  .primary-nav {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 1rem;
    left: 1rem;
    display: none;
    padding: 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-surface);
    box-shadow: var(--shadow-lg);
  }

  .primary-nav.is-open {
    display: block;
  }

  .primary-nav ul {
    flex-direction: column;
    align-items: stretch;
  }

  .primary-nav a {
    display: block;
    padding: 0.65rem;
  }

  .hero {
    min-height: auto;
  }

  .hero-grid,
  .two-column,
  .ai-grid,
  .resume-grid,
  .contact-card {
    grid-template-columns: 1fr;
  }

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

  .project-featured {
    display: block;
  }
}

@media (max-width: 640px) {
  .section-heading {
    grid-template-columns: 1fr;
  }

  .skills-grid,
  .projects-grid {
    grid-template-columns: 1fr;
  }

  .project-featured {
    grid-column: auto;
  }

  .hero-details {
    display: grid;
  }

  .hero-details li::after {
    display: none;
  }

  .footer-grid {
    display: grid;
  }

  .footer-meta {
    text-align: left;
  }
}

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