/**
 * layout.css
 * Structural layout and section-level composition.
 */

:root {
  --content-max-width: 1440px;
}

main,
.site-main {
  width: 100%;
}

/* ── Copy / Selection restriction on main landing page ────────────────
   Prevent casual text selection. Form inputs are excluded so
   users can still paste into the contact form.
   Admin page loads admin.css instead of layout.css — unaffected.
   ─────────────────────────────────────────────────────────────── */
body {
  -webkit-user-select: none;
  -moz-user-select:    none;
  -ms-user-select:     none;
  user-select:         none;
}

input,
textarea,
[contenteditable="true"] {
  -webkit-user-select: text;
  -moz-user-select:    text;
  -ms-user-select:     text;
  user-select:         text;
}

.section,
section[id] {
  position: relative;
  width: 100%;
  padding-block: clamp(4rem, 8vw, 10rem);
}

.section.is-empty-compact,
section[id].is-empty-compact {
  padding-block: clamp(1.25rem, 2.8vw, 2.25rem);
}

.section-empty-badge {
  margin-left: var(--sp-3);
}

.container,
.layout-container {
  width: min(100% - clamp(1.5rem, 4vw, 4rem), var(--content-max-width));
  margin-inline: auto;
}

#hero {
  min-height: 100dvh;
  display: grid;
  align-items: end;
  padding-block-start: clamp(6rem, 12vw, 12rem);
  padding-block-end: clamp(3rem, 6vw, 6rem);
  position: relative;   /* needed so scroll-indicator positions against hero */
}

/* Scroll indicator — anchored to hero bottom-center, unobtrusive */
.hero-scroll-indicator {
  position: absolute;
  bottom: clamp(1.25rem, 3vw, 2rem);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  opacity: 0.35;
  color: var(--text-secondary);
  pointer-events: none;
  transition: opacity var(--dur-normal, 340ms) ease;
  will-change: opacity;
}

.hero-scroll-indicator span {
  font-family: var(--font-mono, monospace);
  font-size: 0.6rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.hero-scroll-indicator svg {
  width: 12px;
  height: 18px;
  display: block;
}

/* Fade to invisible once page is scrolled */
.hero-scroll-indicator.is-hidden {
  opacity: 0;
}

/* Subtle dot bounce — draws attention without being obtrusive */
@keyframes scroll-dot-bounce {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(3px); }
}

.hero-scroll-dot {
  animation: scroll-dot-bounce 1.8s ease-in-out infinite;
}

@media (prefers-reduced-motion: reduce) {
  .hero-scroll-dot { animation: none; }
}

#projects,
#experience,
#awards,
#contact {
  min-height: min(100dvh, 980px);
}

/* About: no min-height forced — content determines height */
#about {
  min-height: 0;
}

/* Tech stack + Blog: compact when collapsed, full height when open */
#tech-stack,
#blog {
  min-height: 0;
  padding-block: clamp(1.5rem, 3vw, 2.5rem);
  transition: padding-block 0.4s ease;
}

#tech-stack.is-open,
#blog.is-open {
  padding-block: clamp(4rem, 8vw, 10rem);
}

@media (max-width: 1024px) {
  .section,
  section[id] {
    padding-block: clamp(3rem, 8vw, 6rem);
  }

  #hero {
    min-height: auto;
  }

  /* Keep tech/blog compact when collapsed on tablet/mobile too */
  #tech-stack,
  #blog {
    padding-block: clamp(1.25rem, 2.5vw, 2rem);
  }

  #tech-stack.is-open,
  #blog.is-open {
    padding-block: clamp(3rem, 8vw, 6rem);
  }
}

/* ═══════════════════════════════════════════════════════════════
   HERO COLUMN LAYOUT
   Mobile: stacked single-column (text above canvas)
   Desktop (≥1024px): 40% text / 60% canvas side-by-side
   ═══════════════════════════════════════════════════════════════ */

/* Horizontal padding adapts so content never exceeds --content-max on ultra-wide screens.
   Formula: when viewport > --content-max, padding grows to center the content grid.
   At 1920px → max(5rem, (1920-1440)/2 = 240px) → 1920−480 = 1440px content.
   At 1440px → max(5rem, 0) → no change.
   At  768px → max(3.5rem, negative) → normal clamp value. */
#hero {
  padding-inline: max(var(--section-pad-h), calc((100% - var(--content-max)) / 2));
  /* Prevent .section.is-full { place-items: center } from shrink-wrapping grid cells */
  justify-items: stretch;
}

/* Text column — flex column so gap between typed/CTA stays consistent */
.hero-text {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: var(--sp-4);
  position: relative;
  z-index: 1;
}

/* ── Hero CTA button row ──────────────────────────────────────
   Issue 1: Inconsistent gap + mobile misalignment
   Fix: flex-col gap-3 on mobile → flex-row gap-4 on ≥640px     */
.hero-cta {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--sp-3);          /* 12px — consistent on all mobile sizes */
  margin-top: var(--sp-6);
}

@media (min-width: 640px) {
  .hero-cta {
    flex-direction: row;
    align-items: center;
    flex-wrap: wrap;           /* allow wrap if viewport narrow */
    gap: var(--sp-4);          /* 16px — breathing room on tablet+ */
  }
}

/* Canvas wrapper — holds Three.js canvas + tsParticles fallback + CSS blueprint decoration.
   On mobile it collapses to a short decorative strip below the text; on desktop it fills
   the full right column of the two-column hero grid. */
.hero-canvas-wrapper {
  position: relative;
  pointer-events: none;
  overflow: hidden;
  /* Short strip on mobile — decorative, not critical content */
  min-height: clamp(200px, 42vw, 460px);
}

/* Blueprint / coordinate-grid backdrop drawn purely in CSS.
   Fine 32px grid + coarse 96px grid, vignetted toward the center.
   Visible while JS canvas loads or when WebGL is unavailable. */
.hero-canvas-wrapper::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  /* Fine seam lines every --sp-8 (32px), coarse axis lines every --sp-24 (96px) */
  background-image:
    linear-gradient(to right,  var(--border, rgba(0, 212, 255, 0.07)) 1px, transparent 1px),
    linear-gradient(to bottom, var(--border, rgba(0, 212, 255, 0.07)) 1px, transparent 1px),
    linear-gradient(to right,  var(--border, rgba(0, 212, 255, 0.14)) 1px, transparent 1px),
    linear-gradient(to bottom, var(--border, rgba(0, 212, 255, 0.14)) 1px, transparent 1px);
  background-size:
    var(--sp-8)  var(--sp-8),
    var(--sp-8)  var(--sp-8),
    var(--sp-24) var(--sp-24),
    var(--sp-24) var(--sp-24);
  /* Radial vignette: grid fades out toward all edges — not harsh, not overdesigned */
  -webkit-mask-image: radial-gradient(ellipse 80% 75% at 55% 48%,
                       rgba(0,0,0,0.6) 25%, transparent 72%);
          mask-image: radial-gradient(ellipse 80% 75% at 55% 48%,
                       rgba(0,0,0,0.6) 25%, transparent 72%);
}

/* Spline 3D canvas — primary canvas, above Three.js and blueprint grid.
   pointer-events: auto  → mouse/touch interactions reach Spline objects.
   touch-action: pan-y   → vertical scroll still works when touching empty space.
   background: transparent → shows dark theme behind transparent model areas.   */
.hero-spline-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  z-index: 3;
  background: transparent;
  pointer-events: auto;
  touch-action: pan-y;
  opacity: 0;
  transition: opacity 0.6s ease;
  /* mix-blend-mode: screen makes pure black invisible on dark backgrounds.
     Spline WebGL renderers often can't expose alpha, so this is the reliable
     fallback: black (the Spline bg) becomes transparent, the model shows through. */
  mix-blend-mode: screen;
}

/* Light theme: use multiply instead — white bg becomes transparent, dark objects stay visible */
[data-theme="light-minimal"] .hero-spline-canvas {
  mix-blend-mode: multiply;
}

.hero-spline-canvas.is-loaded {
  opacity: 1;
}

/* Hide Spline "Built with Spline" watermark — injected into document.body */
a[href*="spline.design"],
div:has(> a[href*="spline.design"]) {
  display: none !important;
  pointer-events: none !important;
}

/* Three.js canvas fills the wrapper absolutely */
.hero-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  z-index: 1;          /* above blueprint grid */
}

/* tsParticles fallback — same stack position as canvas */
.hero-particles {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

/* Mobile: reduce canvas height so it doesn't dominate the viewport.
   Spline canvas keeps pointer-events so pinch/rotate interactions work, but
   touch-action: pan-y ensures the page is still scrollable by swiping up. */
@media (max-width: 768px) {
  .hero-spline-canvas {
    touch-action: pan-y;
  }
}

/* Desktop two-column split */
@media (min-width: 1024px) {
  #hero {
    grid-template-columns: 40% 60%;
    grid-template-areas:
      "text  canvas"
      "scroll scroll";
    column-gap: 0;
    align-items: center;
  }

  .hero-text {
    grid-area: text;
    padding-right: var(--sp-12);
  }

  .hero-canvas-wrapper {
    grid-area: canvas;
    height: 100%;
    min-height: 0;   /* mobile min-height no longer needed — height = grid row = 100dvh */
  }

  /* hero-scroll-indicator is absolute so it auto-escapes the grid */
}

/* ═══════════════════════════════════════════════════════════════
   HERO TYPOGRAPHY & INTERNALS
   ═══════════════════════════════════════════════════════════════ */

/* Metadata line — "Hongik Univ. · Seoul, KR · Open to Opportunities" */
.hero-meta {
  font-family: var(--font-mono);
  font-size: var(--text-meta);
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  color: var(--accent);
  opacity: 0.75;
  margin: 0;
}

/* Giant display title — PRD: "must dominate", 10vw fluid */
.hero-title {
  font-family: var(--font-display);
  font-size: var(--text-display);   /* clamp(3rem, 10vw, 9rem) */
  font-weight: 700;
  letter-spacing: var(--tracking-tight);
  line-height: 0.93;                /* very tight — intentional display-type compression */
  color: var(--text-primary);
  margin: 0;
  font-feature-settings: var(--font-features-display);
  -webkit-font-smoothing: antialiased;
  /* Override the global h1 overflow-wrap:break-word reset — that rule was the root
     cause of "Conte\xt" / "Engine\er" mid-word breaks on desktop. */
  overflow-wrap: normal;
  word-break: keep-all;             /* allow breaks between words, never inside them */
}

/* Each title span is block — natural wrapping within the column */
.hero-title-line {
  display: block;
  word-break: keep-all;             /* redundant safety: keep-all on the span too */
}

/* Second line: intentionally offset to the right → PRD asymmetric depth aesthetic */
.hero-title-line--offset {
  padding-left: clamp(var(--sp-6), 5vw, var(--sp-20));
  color: var(--text-secondary);     /* subtly dimmed → visual depth separation */
}

/* Typed.js subtitle wrapper */
.hero-typed-wrapper {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0 var(--sp-2);
  min-height: 1.8em;                /* prevent layout shift while strings cycle */
  color: var(--text-secondary);
  font-size: var(--text-small);
}

.hero-typed-prefix {
  color: var(--text-tertiary);
}

.hero-typed {
  color: var(--accent);
}

/* Blinking cursor — step-end for crisp terminal blink, not smooth fade */
.hero-typed-cursor {
  color: var(--accent);
  animation: typed-cursor-blink 0.9s step-end infinite;
}

@keyframes typed-cursor-blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .hero-typed-cursor { animation: none; opacity: 1; }
}

/* ═══════════════════════════════════════════════════════════════
   SECTION HEADERS
   Issue 2 (partial): shared heading + divider layout
   ═══════════════════════════════════════════════════════════════ */

.section-header {
  margin-bottom: var(--sp-10);
}

.section-header h2,
.section-header h3 {
  font-size: var(--text-h1);
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: var(--tracking-tight);
  color: var(--text-primary);
  margin: 0;
  line-height: 1.2;
}

/* Split variant: heading left, CTA right */
.section-header--split {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--sp-4);
}

/* ═══════════════════════════════════════════════════════════════
   TECH STACK + BLOG — CLICK TOGGLE ACCORDION
   Collapsed by default; .is-open toggled via JS on click.
   ═══════════════════════════════════════════════════════════════ */

/* Compact banner header row */
.tech-hover-header {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  padding-bottom: var(--sp-4);
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  transition: border-color 0.25s ease;
  margin-bottom: 0;
  user-select: none;
}

#tech-stack.is-open .tech-hover-header {
  border-color: var(--accent);
}

.tech-tags-preview {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-family: var(--font-mono);
  font-size: clamp(0.7rem, 1vw, 0.8rem);
  color: var(--text-secondary);
  letter-spacing: 0.04em;
  opacity: 0.75;
}

.toggle-hint {
  flex-shrink: 0;
  color: var(--accent);
  font-size: 0.7rem;
  transition: transform 0.35s ease;
}

#tech-stack.is-open .toggle-hint {
  transform: rotate(180deg);
}

/* Collapsible body — collapsed by default */
.tech-collapsible-body {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height 0.45s cubic-bezier(0.4, 0, 0.2, 1),
              opacity 0.3s ease,
              padding-top 0.35s ease;
  padding-top: 0;
}

#tech-stack.is-open .tech-collapsible-body {
  max-height: 1200px;
  opacity: 1;
  padding-top: var(--sp-8);
}

/* Blog click header */
.blog-hover-header {
  margin-bottom: 0;
  cursor: pointer;
  user-select: none;
}

.blog-header-left {
  display: flex;
  align-items: baseline;
  gap: var(--sp-3);
}

.blog-post-count {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-secondary);
  padding: 2px 8px;
  border: 1px solid var(--border);
  border-radius: 4px;
  letter-spacing: 0.04em;
  transition: border-color 0.25s ease, color 0.25s ease;
}

#blog.is-open .blog-post-count {
  border-color: var(--accent);
  color: var(--accent);
}

.blog-collapsible-body {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height 0.45s cubic-bezier(0.4, 0, 0.2, 1),
              opacity 0.3s ease,
              padding-top 0.35s ease;
  padding-top: 0;
}

#blog.is-open .blog-collapsible-body {
  max-height: 800px;
  opacity: 1;
  padding-top: var(--sp-8);
}

/* ═══════════════════════════════════════════════════════════════
   ABOUT SECTION GRID
   ═══════════════════════════════════════════════════════════════ */

.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-12);
}

@media (min-width: 768px) {
  .about-grid {
    grid-template-columns: 42% 1fr;
    gap: clamp(var(--sp-10), 4vw, var(--sp-16));
    align-items: start;
  }
}

.about-photo-wrapper {
  position: relative;
  /* overflow: hidden removed — allows drop-shadow filter to bleed outside box */
  margin: 0 auto;
  max-width: 320px;
}

/* Photo — transparent PNG, sized by image natural ratio */
#about-photo {
  width: 100%;
  max-width: 320px;
  display: block;
  margin: 0 auto;
  background: transparent;
  transition: filter 0.4s ease;
}

/* Per-theme glow/tint filters -------------------------------------------- */
[data-theme="dark-cyber"] #about-photo {
  filter: contrast(1.05) brightness(0.92)
          drop-shadow(0 0 18px rgba(0, 212, 255, 0.25));
}
[data-theme="dark-cyber"] #about-photo:hover {
  filter: contrast(1.05) brightness(1.0)
          drop-shadow(0 0 28px rgba(0, 212, 255, 0.45));
}

[data-theme="terminal-green"] #about-photo {
  filter: contrast(1.05) brightness(0.88)
          drop-shadow(0 0 16px rgba(0, 200, 83, 0.2));
}
[data-theme="terminal-green"] #about-photo:hover {
  filter: contrast(1.05) brightness(0.98)
          drop-shadow(0 0 24px rgba(0, 200, 83, 0.4));
}

[data-theme="midnight-purple"] #about-photo {
  filter: contrast(1.05) brightness(0.88)
          drop-shadow(0 0 18px rgba(191, 95, 255, 0.25));
}
[data-theme="midnight-purple"] #about-photo:hover {
  filter: contrast(1.05) brightness(1.0)
          drop-shadow(0 0 28px rgba(191, 95, 255, 0.45));
}

[data-theme="light-minimal"] #about-photo {
  filter: drop-shadow(0 2px 12px rgba(0, 0, 0, 0.12));
}
[data-theme="light-minimal"] #about-photo:hover {
  filter: drop-shadow(0 4px 20px rgba(0, 0, 0, 0.2));
}

.about-pull-quote {
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 2.5vw, 2rem);
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-primary);
  letter-spacing: var(--tracking-tight);
  margin: 0 0 var(--sp-6);
  padding: 0;
}

/* Left-column intro text — collapsible on mobile, shown tablet+ */
.about-left-text {
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--text-secondary);
  white-space: pre-line;
  margin: 0;

  /* Mobile: collapsed by default */
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  padding-top: 0;
  transition:
    max-height  0.6s cubic-bezier(0.22, 1, 0.36, 1),
    opacity     0.5s cubic-bezier(0.22, 1, 0.36, 1),
    padding-top 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}

/* Expanded state on mobile */
.about-left-text.is-expanded {
  max-height: 2000px;
  opacity: 1;
  padding-top: var(--sp-4);
}

/* "Read story" toggle — mobile only */
.about-read-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-bottom: var(--sp-4);
  padding: var(--sp-2) var(--sp-3);
  font-family: var(--font-mono);
  font-size: var(--text-meta);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--accent);
  background: none;
  border: 1px solid var(--accent);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background 0.3s ease, color 0.3s ease, opacity 0.3s ease;
  -webkit-tap-highlight-color: transparent;
}

.about-read-toggle:hover {
  background: var(--accent);
  color: var(--bg-base);
}

.about-read-toggle:active {
  opacity: 0.7;
}

.about-read-toggle .toggle-chevron {
  display: inline-block;
  width: 14px;
  height: 14px;
  transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}

.about-read-toggle.is-open .toggle-chevron {
  transform: rotate(180deg);
}

@media (min-width: 768px) {
  .about-left-text {
    max-height: none;
    opacity: 1;
    overflow: visible;
    padding-top: 0;
    font-size: clamp(0.875rem, 1.2vw, 1rem);
  }

  .about-read-toggle {
    display: none;
  }
}

.about-section-label {
  font-family: var(--font-mono);
  font-size: var(--text-label);
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--sp-4);
}

.about-bio {
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: var(--sp-6);
}

.about-name-display {
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 2.5vw, 1.75rem);
  font-weight: 700;
  color: var(--text-primary);
  text-align: center;
  max-width: 320px;
  margin: var(--sp-4) auto var(--sp-6);
  letter-spacing: 0.02em;
}

.about-education {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  margin-bottom: var(--sp-6);
  color: var(--text-secondary);
}

/* Consecutive education entries — tighten vertical gap */
.about-education + .about-education {
  margin-top: calc(var(--sp-6) * -1 + var(--sp-2));
}

/* ═══════════════════════════════════════════════════════════════
   PROJECTS GRID
   Issue 4: Missing layout → cards collapse / stack incorrectly
   1-col mobile → 2-col tablet+ with aspect-ratio enforced by card
   ═══════════════════════════════════════════════════════════════ */

.projects-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-6);
}

@media (min-width: 640px) {
  .projects-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .projects-grid {
    gap: var(--sp-8);        /* Issue 4: gap-6 md:gap-8 equivalent */
  }
}

/* GitHub compact variant: 3rd column on desktop */
.projects-grid.is-compact {
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .projects-grid.is-compact {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .projects-grid.is-compact {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--sp-6);
  }
}

/* Load-more button centered */
.projects-load-more {
  display: flex;
  justify-content: center;
  gap: var(--sp-3);
  flex-wrap: wrap;
  margin-top: var(--sp-10);
}

/* ═══════════════════════════════════════════════════════════════
   CAREER SECTION — same as experience, uses is-surface background
   ═══════════════════════════════════════════════════════════════ */
.section-career .section-inner {
  max-width: var(--content-max, 72rem);
}

/* ═══════════════════════════════════════════════════════════════
   EXPERIENCE / ACCORDION
   Compact accordion list — top 3 open by default, rest collapsed.
   Single-column on all breakpoints; no alternating layout.
   ═══════════════════════════════════════════════════════════════ */

/* Container */
.exp-accordion {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--border, rgba(0, 212, 255, 0.15));
}

/* Row */
.exp-item {
  border-bottom: 1px solid var(--border, rgba(0, 212, 255, 0.15));
}

/* Clickable header — full-width button */
.exp-header {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
  padding: 1rem 0;
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  color: inherit;
  transition: color var(--dur-fast, 0.15s) ease;
}

.exp-header:hover .exp-title {
  color: var(--accent);
}

.exp-header:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 2px;
}

/* Date badge */
.exp-date {
  font-family: var(--font-mono);
  font-size: var(--text-small, 0.75rem);
  letter-spacing: var(--tracking-label, 0.08em);
  color: var(--accent);
  white-space: nowrap;
  flex-shrink: 0;
  min-width: 7.5rem;
}

/* Title + org group */
.exp-title-group {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  min-width: 0;
}

.exp-title {
  font-family: var(--font-display);
  font-size: var(--text-h3, 1.1rem);
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
  line-height: 1.2;
  transition: color var(--dur-fast, 0.15s) ease;
}

.exp-org {
  font-family: var(--font-mono);
  font-size: var(--text-small, 0.75rem);
  letter-spacing: var(--tracking-label, 0.05em);
  color: var(--text-secondary);
}

/* Animated chevron */
.exp-chevron {
  font-size: 0.6rem;
  color: var(--accent);
  flex-shrink: 0;
  display: inline-block;
  transition: transform 0.3s var(--ease-out-expo, ease);
  opacity: 0.7;
}

.exp-item--open .exp-chevron {
  transform: rotate(180deg);
}

/* Detail panel — max-height accordion transition */
.exp-detail {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s var(--ease-out-expo, cubic-bezier(0.16,1,0.3,1));
}

.exp-item--open .exp-detail {
  max-height: 3000px;
}

.exp-detail-inner {
  padding: 0 0 1.25rem 0;
}

.exp-content {
  display: grid;
  grid-template-columns: minmax(180px, 280px) minmax(0, 1fr);
  gap: var(--sp-4);
  align-items: start;
}

.exp-text {
  min-width: 0;
}

.exp-media {
  width: 100%;
}

.exp-media-image {
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-md);
  display: block;
}

.exp-media-video {
  width: 100%;
  height: auto;
  max-height: 320px;
  object-fit: cover;
  border-radius: var(--radius-md);
  display: block;
  background: var(--bg-overlay);
}

.exp-desc {
  color: var(--text-secondary);
  line-height: 1.7;
  margin: 0 0 var(--sp-3, 0.75rem) 0;
  font-size: 0.925rem;
}

@media (max-width: 900px) {
  .exp-content {
    grid-template-columns: 1fr;
  }
}

/* Skeleton rows */
.exp-item.is-skeleton {
  padding: 1rem 0;
}

/* Fallback error card (keep .timeline-card minimal) */
.timeline-fallback .timeline-card {
  background: var(--bg-surface);
  border: 1px solid var(--border, rgba(0, 212, 255, 0.15));
  border-radius: var(--radius-md);
  padding: var(--sp-6);
}

/* Tablet / large mobile: reduce date width, allow wrapping */
@media (max-width: 767px) {
  .exp-header {
    flex-wrap: wrap;
    gap: var(--sp-2);
  }

  .exp-date {
    min-width: unset;
    order: -1;
    width: 100%;
    font-size: 0.7rem;
  }

  .exp-title {
    font-size: 0.95rem;
  }

  .exp-org {
    font-size: 0.7rem;
  }

  .exp-desc {
    font-size: 0.85rem;
  }
}

/* Small mobile: extra compact */
@media (max-width: 479px) {
  .exp-header {
    padding: 0.75rem 0;
  }

  .exp-title {
    font-size: 0.9rem;
  }
}

/* ═══════════════════════════════════════════════════════════════
   AWARDS GRID
   Issue 5: Missing layout + irregular li spacing
   1 → 2 → 3 columns; featured card spans full row
   ═══════════════════════════════════════════════════════════════ */

.awards-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-4);
}

@media (min-width: 640px) {
  .awards-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .awards-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--sp-6);
  }
}

.award-card {
  background: var(--bg-surface);
  border: 1px solid var(--border, rgba(0, 212, 255, 0.15));
  border-radius: var(--radius-md);
  padding: var(--sp-6);
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  transition:
    box-shadow   var(--dur-normal) var(--ease-out-expo),
    border-color var(--dur-normal) var(--ease-out-expo);
}

.award-card:hover {
  box-shadow: 0 0 0 1px var(--accent);
  border-color: rgba(var(--accent-rgb), 0.5);
}

/* Featured award — spans full row */
.award-card.award-card--featured {
  grid-column: 1 / -1;
  background: var(--bg-elevated, var(--bg-overlay));
  border-color: rgba(var(--accent-rgb), 0.3);
}

.award-date {
  margin: 0 0 var(--sp-1, 0.25rem) 0;
  opacity: 0.85;
}

.award-issuer {
  margin: 0 0 var(--sp-2, 0.5rem) 0;
  opacity: 0.82;
}

.award-text-link {
  display: block;
  color: inherit;
  text-decoration: none;
}

.award-text-link h3,
.award-text-link p {
  transition: color var(--dur-fast) var(--ease-out-expo);
}

.award-text-link:hover h3,
.award-text-link:focus-visible h3 {
  color: var(--accent);
}

.award-link-hint {
  display: block;
  margin-top: var(--sp-2);
  opacity: 0;
  transform: translateY(2px);
  transition: opacity var(--dur-fast) var(--ease-out-expo), transform var(--dur-fast) var(--ease-out-expo);
}

.award-text-link:hover .award-link-hint,
.award-text-link:focus-visible .award-link-hint,
.exp-text-link:hover .award-link-hint,
.exp-text-link:focus-visible .award-link-hint {
  opacity: 0.92;
  transform: translateY(0);
}

.exp-text-link {
  display: inline-block;
  margin: 0 0 var(--sp-3, 0.75rem) 0;
  color: inherit;
  text-decoration: none;
}

.project-text-link {
  display: block;
  color: inherit;
  text-decoration: none;
}

.project-text-link h3,
.project-text-link p {
  transition: color var(--dur-fast) var(--ease-out-expo);
}

.project-text-link:hover h3,
.project-text-link:focus-visible h3 {
  color: var(--accent);
}

.exp-link-cta {
  display: inline-block;
  color: var(--accent);
  text-decoration: underline;
}

/* Issue 5: Remove double margins — normalize all li to mb-4, no mt */
.award-card li,
.awards-grid li {
  margin-bottom: var(--sp-4);
  margin-top: 0;
}

.award-card li:last-child,
.awards-grid li:last-child {
  margin-bottom: 0;
}

/* ═══════════════════════════════════════════════════════════════
   BLOG GRID
   1 → 2 → 3 columns
   ═══════════════════════════════════════════════════════════════ */

.blog-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-6);
}

@media (min-width: 640px) {
  .blog-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .blog-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--sp-8);
  }
}

/* ═══════════════════════════════════════════════════════════════
   RESPONSIVE CARD & TECH CARD PADDING
   Issue 3 (tech) + Issue 4 (project cards): reduce padding on mobile
   ═══════════════════════════════════════════════════════════════ */

@media (max-width: 639px) {
  /* Issue 4: cards too tall with excessive padding on mobile */
  .card-body {
    padding: var(--sp-4);
  }

  .card-footer {
    padding: var(--sp-3) var(--sp-4);
  }

  /* Issue 3: tech category cards — tighter on small screens */
  .tech-category-card {
    padding: var(--sp-4);
  }
}

/* ═══════════════════════════════════════════════════════════════
   CONTACT SECTION
   Left: editorial statement.
   Right: LinkedIn card, GitHub, email copy, contact form.
   ═══════════════════════════════════════════════════════════════ */

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.25fr;
  gap: var(--sp-16);
  align-items: start;
}

@media (max-width: 900px) {
  .contact-grid {
    grid-template-columns: 1fr;
    gap: var(--sp-8);
  }
}

.contact-statement-col .accent-divider {
  display: block;
  margin-bottom: var(--sp-6);
}

.contact-statement {
  font-size: var(--text-display-sm);
  line-height: 1.15;
  color: var(--text-primary);
}

/* ── Right column ── */
.contact-right-col {
  display: flex;
  flex-direction: column;
  gap: var(--sp-5);
}

/* ── LinkedIn card ── */
.contact-linkedin-card {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  padding: var(--sp-4) var(--sp-5);
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition:
    box-shadow   var(--dur-normal) var(--ease-out-expo),
    border-color var(--dur-normal) var(--ease-out-expo);
}

.contact-linkedin-card:hover {
  box-shadow: 0 0 0 1px var(--accent);
  border-color: rgba(var(--accent-rgb), 0.4);
}

.contact-linkedin-photo-wrapper {
  flex-shrink: 0;
  position: relative;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  border: 2px solid var(--border);
  background: var(--bg-elevated);
  overflow: hidden;
  /* Initials fallback rendered via pseudo-element */
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1rem;
  color: var(--accent);
}

.contact-linkedin-photo-wrapper::before {
  content: 'JK';
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.contact-linkedin-photo-wrapper img {
  display: block;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  position: relative;
  z-index: 1;           /* covers the ::before initials once loaded */
  background: transparent;
}

/* When img src is empty, hide the broken icon but show ::before initials */
.contact-linkedin-photo-wrapper img[src=""] {
  opacity: 0;
}

.contact-linkedin-info {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.contact-name {
  font-family: var(--font-display);
  font-size: var(--text-body);
  font-weight: 700;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.contact-title {
  font-family: var(--font-mono);
  font-size: var(--text-meta);
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: var(--tracking-label);
}

/* LinkedIn CTA button */
.linkedin-link {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-2) var(--sp-4);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: var(--text-small);
  text-decoration: none;
  white-space: nowrap;
  flex-shrink: 0;
  transition:
    border-color var(--dur-fast) var(--ease-out-expo),
    color        var(--dur-fast) var(--ease-out-expo),
    background   var(--dur-fast) var(--ease-out-expo);
}

.linkedin-link:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-glow-bg);
}

@media (max-width: 480px) {
  .contact-linkedin-card {
    flex-wrap: wrap;
    gap: var(--sp-3);
  }
  .linkedin-link {
    width: 100%;
    justify-content: center;
  }
}

/* ── GitHub / Email rows ── */
.contact-github,
.contact-email {
  display: flex;
  align-items: center;
}

.contact-email-copy {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-3);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--sp-2) var(--sp-4);
  color: var(--text-secondary);
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: var(--text-small);
  transition:
    border-color var(--dur-fast),
    color        var(--dur-fast);
}

.contact-email-copy:hover {
  border-color: var(--accent);
  color: var(--text-primary);
}

.contact-copy-feedback {
  font-size: var(--text-meta);
  color: var(--accent);
  min-width: 4ch;
}

/* ── Contact form ── */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 0;
}

/* ════════════════════════════════════════════════
   FORM FIELDS — used by both contact form & admin
   (admin.css defines its own .form-input; these
    apply only to pages that load layout.css)
   ════════════════════════════════════════════════ */

.form-field {
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
  margin-bottom: var(--sp-4);
}

.form-field:last-of-type {
  margin-bottom: 0;
}

.form-label {
  font-family: var(--font-mono);
  font-size: var(--text-meta);
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: var(--tracking-label);
}

.form-input {
  width: 100%;
  box-sizing: border-box;
  padding: var(--sp-3) var(--sp-4);
  background: var(--bg-elevated, var(--bg-surface));
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: var(--text-small);
  line-height: 1.5;
  outline: none;
  -webkit-appearance: none;
  appearance: none;
  transition:
    border-color var(--dur-fast) var(--ease-out-expo),
    box-shadow   var(--dur-fast) var(--ease-out-expo);
}

.form-input::placeholder {
  color: var(--text-tertiary);
  opacity: 1;
}

.form-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(var(--accent-rgb), 0.12);
}

.form-input[aria-invalid="true"] {
  border-color: var(--accent-alt);
}

.form-textarea {
  resize: vertical;
  min-height: 130px;
}

.form-field-footer {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--sp-3);
  margin-top: var(--sp-1);
}

.field-error {
  font-family: var(--font-mono);
  font-size: var(--text-meta);
  color: var(--accent-alt);
  margin: 0;
}

.form-char-count {
  font-family: var(--font-mono);
  font-size: var(--text-meta);
  color: var(--text-tertiary);
  flex-shrink: 0;
  text-align: right;
}

.form-submit {
  margin-top: var(--sp-5);
  align-self: flex-start;
}

.form-status {
  margin-top: var(--sp-4);
  font-family: var(--font-mono);
  font-size: var(--text-small);
  padding: var(--sp-3) var(--sp-4);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg-surface);
}

/* ═══════════════════════════════════════════════════════════════
   CONTACT SECTION HEADING
   ═══════════════════════════════════════════════════════════════ */

.contact-section-header {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  margin-bottom: var(--sp-10);
}

.contact-section-title {
  font-size: var(--text-h2);
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  color: var(--text-primary);
  line-height: 1;
}

/* remove the old accent-divider from left statement col — heading now owns it */
.contact-section-header .accent-divider {
  flex-shrink: 0;
  width: 3rem;
  display: block;
  margin-bottom: 0;
}

/* ═══════════════════════════════════════════════════════════════
   SITE FOOTER
   Row 1 (top): copyright left ←→ social icons right
   Row 2 (bottom): centered — privacy · THEME swatches
   ═══════════════════════════════════════════════════════════════ */

.site-footer {
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  padding-block: var(--sp-6) var(--sp-5);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
}

/* ── Row 1 ── */
.footer-row-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
  flex-wrap: wrap;
}

.footer-copy {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  margin: 0;
}

/* ── Social icon cluster ── */
.footer-icons {
  display: flex;
  align-items: center;
  gap: var(--sp-1);
}

.footer-icon-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  background: transparent;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  text-decoration: none;
  transition:
    color      160ms var(--ease-out-expo),
    background 160ms var(--ease-out-expo);
}

.footer-icon-link:hover {
  color: #00bcd4;
  background: rgba(0, 188, 212, 0.10);
}

.footer-icon-link:focus-visible {
  outline: var(--focus-ring);
  outline-offset: var(--focus-ring-offset);
}

/* ── Row 2 ── */
.footer-row-bottom {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-5);
  flex-wrap: wrap;
}

.footer-meta-link {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-tertiary);
  text-decoration: none;
  letter-spacing: 0.06em;
  transition: color 160ms;
}

.footer-meta-link:hover {
  color: var(--text-secondary);
}

.footer-meta-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-tertiary);
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  pointer-events: none;
  user-select: none;
}

/* Footer theme swatches — smaller than navbar swatches */
.footer-theme-selector {
  display: flex;
  align-items: center;
  gap: 6px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-theme-selector .theme-swatch {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 1px solid var(--border);
  padding: 0;
  cursor: pointer;
  transition:
    border-color 160ms,
    transform    160ms,
    box-shadow   160ms;
}

.footer-theme-selector .theme-swatch[data-theme-target="dark-cyber"]        { background: #07090f; }
.footer-theme-selector .theme-swatch[data-theme-target="terminal-green"]     { background: #061006; }
.footer-theme-selector .theme-swatch[data-theme-target="midnight-purple"]    { background: #0e0820; }
.footer-theme-selector .theme-swatch[data-theme-target="light-minimal"]      { background: #ffffff; }

.footer-theme-selector .theme-swatch:hover,
.footer-theme-selector .theme-swatch.is-active {
  border-color: var(--accent);
  transform: scale(1.25);
  box-shadow: 0 0 0 2px rgba(var(--accent-rgb), 0.3);
}

/* ── Mobile: stack everything centered ── */
@media (max-width: 600px) {
  .footer-row-top {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: var(--sp-3);
  }

  .footer-row-bottom {
    gap: var(--sp-3);
  }
}