/* ============================================================
   DESIGN TOKENS
   ============================================================ */
:root {
  /* Colors */
  --color-bg:            #0F172A;
  --color-surface:       #1E293B;
  --color-surface-hover: #263448;
  --color-border:        #334155;
  --color-text:          #F1F5F9;
  --color-muted:         #94A3B8;
  --color-accent:        #38BDF8;
  --color-accent-hover:  #7DD3FC;
  --color-tag-bg:        #0D2137;
  --color-tag-text:      #38BDF8;
  --color-nav-bg:        transparent;
  --color-nav-scrolled:  #0F172A;
  --color-status:        #4ADE80;

  /* Typography */
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  --text-xs:   0.75rem;
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-lg:   1.125rem;
  --text-xl:   1.25rem;
  --text-2xl:  1.5rem;
  --text-3xl:  1.875rem;
  --text-4xl:  2.25rem;
  --text-hero: clamp(2.5rem, 6vw, 4.5rem);

  --leading-tight:   1.25;
  --leading-normal:  1.6;

  --weight-normal:   400;
  --weight-medium:   500;
  --weight-semibold: 600;

  /* Spacing */
  --space-1:   0.25rem;
  --space-2:   0.5rem;
  --space-3:   0.75rem;
  --space-4:   1rem;
  --space-6:   1.5rem;
  --space-8:   2rem;
  --space-12:  3rem;
  --space-16:  4rem;
  --space-24:  6rem;
  --space-32:  8rem;

  --section-padding-y:        6.25rem;
  --section-padding-y-mobile: 3.75rem;
  --content-max-width:        1100px;
  --nav-height:               70px;

  /* Components */
  --radius-sm:   4px;
  --radius-md:   8px;
  --radius-lg:   12px;
  --radius-full: 9999px;

  --shadow-card:       0 4px 24px rgba(0, 0, 0, 0.4);
  --shadow-card-hover: 0 8px 32px rgba(0, 0, 0, 0.5);

  --transition-fast:   150ms ease;
  --transition-normal: 200ms ease;
  --transition-slow:   600ms ease;

  --border-width: 1px;
  --border:       var(--border-width) solid var(--color-border);
}

/* ============================================================
   BASE RESET & GLOBALS
   ============================================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* Lenis owns smooth scrolling — scroll-behavior: smooth intentionally omitted */
html {
  scroll-padding-top: var(--nav-height);
}

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

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

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

ul, ol {
  list-style: none;
}

/* Prevent orphaned single-word line breaks on headings */
h1, h2, h3, h4 {
  text-wrap: balance;
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* ============================================================
   SKIP LINK
   ============================================================ */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  background: var(--color-accent);
  color: var(--color-bg);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  z-index: 9999;
  font-weight: var(--weight-medium);
  font-size: var(--text-sm);
}
.skip-link:focus {
  top: var(--space-4);
}

/* ============================================================
   VIEW TRANSITIONS
   ============================================================ */
@keyframes fade-in  { from { opacity: 0; } to { opacity: 1; } }
@keyframes fade-out { from { opacity: 1; } to { opacity: 0; } }

::view-transition-old(root) {
  animation: 200ms ease fade-out;
}
::view-transition-new(root) {
  animation: 300ms ease fade-in;
}

/* ============================================================
   NAVIGATION
   ============================================================ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  background: var(--color-nav-bg);
  border-bottom: 1px solid transparent;
  transition: background var(--transition-normal), border-color var(--transition-normal);
}

.site-header.scrolled {
  background: rgba(15, 23, 42, 0.95);
  border-bottom-color: var(--color-border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.nav-inner {
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-accent);
  letter-spacing: 0.05em;
  transition: color var(--transition-fast);
}
.nav-brand:hover {
  color: var(--color-accent-hover);
}

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

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  list-style: none;
}

.nav-links a {
  font-size: var(--text-sm);
  color: var(--color-muted);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  transition: color var(--transition-fast);
  display: flex;
  align-items: center;
  gap: var(--space-1);
}
.nav-links a:hover,
.nav-links a.active {
  color: var(--color-accent);
}

.nav-num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-accent);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
  z-index: 1001;
}

.hamburger-bar {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition-normal), opacity var(--transition-normal);
}

/* ============================================================
   SECTION WRAPPERS & HEADINGS
   ============================================================ */
.section {
  padding: var(--section-padding-y) 0;
}

.section-inner {
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

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

.section-label {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-accent);
  margin-bottom: var(--space-2);
}

.section-title {
  font-size: var(--text-3xl);
  font-weight: var(--weight-semibold);
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: var(--space-4);
  white-space: nowrap;
}

.section-line {
  display: block;
  height: 1px;
  background: var(--color-border);
  flex: 1;
  max-width: 300px;
}

.section-intro {
  color: var(--color-muted);
  margin-top: var(--space-3);
  font-size: var(--text-base);
}

/* ============================================================
   TECH TAG PATTERN
   ============================================================ */
.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  list-style: none;
  padding: 0;
}

.tag-list li {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-tag-text);
  background: var(--color-tag-bg);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  border: 1px solid rgba(56, 189, 248, 0.2);
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  font-family: var(--font-mono);
  letter-spacing: 0.03em;
  transition: var(--transition-normal);
  cursor: pointer;
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-bg);
  border: 1px solid var(--color-accent);
}
.btn-primary:hover {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
}

.btn-outline {
  background: transparent;
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
}
.btn-outline:hover {
  background: rgba(56, 189, 248, 0.08);
}

.btn-resume {
  background: transparent;
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
}
.btn-resume:hover {
  background: rgba(56, 189, 248, 0.08);
}

/* ============================================================
   SCROLL REVEAL
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
   CARD SPOTLIGHT EFFECT
   ============================================================ */
.other-project-card,
.research-card {
  position: relative;
  overflow: hidden;
}

.other-project-card::before,
.research-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(
    500px circle at var(--mouse-x, 50%) var(--mouse-y, 50%),
    rgba(56, 189, 248, 0.07),
    transparent 60%
  );
  opacity: 0;
  transition: opacity 300ms ease;
  pointer-events: none;
  z-index: 0;
}

.other-project-card:hover::before,
.research-card:hover::before {
  opacity: 1;
}

.other-project-card > *,
.research-card > * {
  position: relative;
  z-index: 1;
}

/* ============================================================
   HERO SECTION
   ============================================================ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--nav-height);
}

.hero-inner {
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: var(--space-16) var(--space-6);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--space-16);
  align-items: center;
  width: 100%;
}

/* Availability badge */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
  padding: var(--space-2) var(--space-3);
  background: rgba(74, 222, 128, 0.08);
  border: 1px solid rgba(74, 222, 128, 0.25);
  border-radius: var(--radius-full);
  width: fit-content;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  background: var(--color-status);
  flex-shrink: 0;
  animation: status-pulse 2.5s ease infinite;
}

@keyframes status-pulse {
  0%   { box-shadow: 0 0 0 0 rgba(74, 222, 128, 0.45); }
  60%  { box-shadow: 0 0 0 7px rgba(74, 222, 128, 0); }
  100% { box-shadow: 0 0 0 0 rgba(74, 222, 128, 0); }
}

.status-text {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-status);
  letter-spacing: 0.02em;
}

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-accent);
  margin-bottom: var(--space-3);
}

.hero-name {
  font-size: var(--text-hero);
  font-weight: var(--weight-semibold);
  color: var(--color-text);
  line-height: var(--leading-tight);
  margin-bottom: var(--space-4);
}

.hero-tagline {
  font-size: var(--text-2xl);
  color: var(--color-muted);
  line-height: var(--leading-normal);
  max-width: 600px;
  margin-bottom: var(--space-6);
}

.hero-bio {
  font-size: var(--text-base);
  color: var(--color-muted);
  max-width: 520px;
  margin-bottom: var(--space-8);
  line-height: var(--leading-normal);
}

.hero-actions {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}

/* Social proof stats strip */
.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-6);
  list-style: none;
  padding: 0;
}

.hero-stat {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-muted);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  padding: var(--space-1) var(--space-3);
}

/* Hero photo */
.hero-photo-wrap {
  position: relative;
  flex-shrink: 0;
}

.hero-photo {
  width: 560px;
  height: 560px;
  border-radius: var(--radius-full);
  object-fit: cover;
  position: relative;
  z-index: 1;
  border: 3px solid var(--color-accent);
  filter: grayscale(20%);
  transition: filter var(--transition-normal);
}
.hero-photo:hover {
  filter: grayscale(0%);
}

.hero-photo-bg {
  position: absolute;
  top: 16px;
  left: 16px;
  width: 560px;
  height: 560px;
  border-radius: var(--radius-full);
  border: 2px solid var(--color-accent);
  z-index: 0;
  transition: top var(--transition-normal), left var(--transition-normal);
}
.hero-photo-wrap:hover .hero-photo-bg {
  top: 10px;
  left: 10px;
}

/* ============================================================
   ABOUT SECTION
   ============================================================ */
.about-grid {
  display: grid;
  grid-template-columns: 3fr 2fr;
  gap: var(--space-16);
  margin-top: var(--space-12);
}

.about-text {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.about-text p {
  color: var(--color-muted);
  line-height: var(--leading-normal);
}

.about-stack-label {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-accent);
  margin-bottom: var(--space-4);
}

.about-stack-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  list-style: none;
}

.about-stack-list li {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-muted);
  padding-left: var(--space-4);
  position: relative;
}

.about-stack-list li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--color-accent);
}

/* ============================================================
   EXPERIENCE SECTION
   ============================================================ */
.experience-tabs {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 0;
  margin-top: var(--space-12);
}

.experience-tab-list {
  display: flex;
  flex-direction: column;
  border-left: 2px solid var(--color-border);
}

.exp-tab {
  background: none;
  border: none;
  text-align: left;
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-muted);
  cursor: pointer;
  transition: color var(--transition-fast), background var(--transition-fast);
  border-left: 2px solid transparent;
  margin-left: -2px;
  white-space: nowrap;
}
.exp-tab:hover {
  color: var(--color-accent);
  background: rgba(56, 189, 248, 0.05);
}
.exp-tab.active {
  color: var(--color-accent);
  border-left-color: var(--color-accent);
  background: rgba(56, 189, 248, 0.08);
}

.experience-panels {
  padding-left: var(--space-8);
}

.exp-panel { display: block; }
.exp-panel[hidden] { display: none; }

.exp-role {
  font-size: var(--text-xl);
  font-weight: var(--weight-semibold);
  margin-bottom: var(--space-2);
  color: var(--color-text);
}
.exp-company {
  color: var(--color-accent);
}

.exp-meta {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-muted);
  margin-bottom: var(--space-6);
}

.exp-bullets {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  list-style: none;
  padding: 0;
}

.exp-bullets li {
  color: var(--color-muted);
  padding-left: var(--space-6);
  position: relative;
  line-height: var(--leading-normal);
}
.exp-bullets li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-size: var(--text-sm);
}

/* ============================================================
   PROJECTS SECTION
   ============================================================ */

/* Featured projects */
.featured-projects {
  margin-top: var(--space-16);
  display: flex;
  flex-direction: column;
  gap: var(--space-32);
}

.featured-project {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
  align-items: center;
  position: relative;
}

.featured-project--reverse {
  direction: rtl;
}
.featured-project--reverse > * {
  direction: ltr;
}

.featured-project-image {
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--color-surface);
  aspect-ratio: 16/10;
}
.featured-project-image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  transition: filter var(--transition-normal);
  filter: grayscale(20%) brightness(0.9);
}
.featured-project-image:hover img {
  filter: grayscale(0%) brightness(1);
}

/* Placeholder for missing screenshots */
.featured-project-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-surface);
  aspect-ratio: 16/10;
  border-radius: var(--radius-md);
}
.featured-project-placeholder span {
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  color: var(--color-muted);
  letter-spacing: 0.05em;
}

.featured-project-num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-accent);
  margin-bottom: var(--space-2);
}

.featured-project-title {
  font-size: var(--text-2xl);
  font-weight: var(--weight-semibold);
  margin-bottom: var(--space-1);
}
.featured-project-title a {
  color: var(--color-text);
  transition: color var(--transition-fast);
}
.featured-project-title a:hover {
  color: var(--color-accent);
}

.featured-project-subtitle {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-muted);
  margin-bottom: var(--space-4);
}

.featured-project-desc {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  margin-bottom: var(--space-4);
  box-shadow: var(--shadow-card);
}
.featured-project-desc p {
  color: var(--color-muted);
  font-size: var(--text-sm);
  line-height: var(--leading-normal);
}

.featured-project-links {
  display: flex;
  gap: var(--space-4);
  margin-top: var(--space-4);
}
.featured-link {
  color: var(--color-muted);
  transition: color var(--transition-fast);
  display: inline-flex;
  align-items: center;
}
.featured-link:hover {
  color: var(--color-accent);
}

/* Other projects */
.other-projects-heading {
  font-size: var(--text-xl);
  font-weight: var(--weight-semibold);
  color: var(--color-text);
  text-align: center;
  margin-top: var(--space-32);
  margin-bottom: var(--space-8);
}

.other-projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
}

.other-project-card {
  background: var(--color-surface);
  border: var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
}
.other-project-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
  border-color: var(--color-accent);
}
.other-project-card--placeholder {
  opacity: 0.5;
  pointer-events: none;
}

.other-project-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--space-2);
}
.other-project-folder {
  color: var(--color-accent);
}
.other-project-links {
  display: flex;
  gap: var(--space-3);
}
.other-project-links a {
  color: var(--color-muted);
  transition: color var(--transition-fast);
  display: inline-flex;
  align-items: center;
}
.other-project-links a:hover {
  color: var(--color-accent);
}

.other-project-title {
  font-size: var(--text-lg);
  font-weight: var(--weight-semibold);
  color: var(--color-text);
}

.other-project-desc {
  font-size: var(--text-sm);
  color: var(--color-muted);
  line-height: var(--leading-normal);
  flex: 1;
}

/* ============================================================
   RESEARCH SECTION
   ============================================================ */
.research-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  margin-top: var(--space-12);
}

.research-card {
  background: var(--color-surface);
  border: var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-8);
  transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
}
.research-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-card);
}

.research-card-header {
  margin-bottom: var(--space-6);
}

.research-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.research-tag {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-muted);
  background: rgba(255, 255, 255, 0.05);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
}

.research-tag--highlight {
  color: var(--color-accent);
  background: var(--color-tag-bg);
  border-color: rgba(56, 189, 248, 0.3);
}

.research-title {
  font-size: var(--text-xl);
  font-weight: var(--weight-semibold);
  color: var(--color-text);
  line-height: var(--leading-tight);
}

/* ============================================================
   CONTACT SECTION
   ============================================================ */
.section--contact {
  text-align: center;
}

.contact-content {
  max-width: 600px;
  margin: 0 auto;
}

.contact-overline {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-accent);
  margin-bottom: var(--space-3);
}

.contact-heading {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: var(--weight-semibold);
  color: var(--color-text);
  margin-bottom: var(--space-6);
}

.contact-body {
  color: var(--color-muted);
  font-size: var(--text-lg);
  line-height: var(--leading-normal);
  margin-bottom: var(--space-8);
}

.contact-cta {
  font-size: var(--text-base);
  padding: var(--space-4) var(--space-8);
  margin-bottom: var(--space-8);
  display: inline-flex;
}

.contact-social {
  display: flex;
  justify-content: center;
  gap: var(--space-6);
}

.contact-social-link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-muted);
  font-size: var(--text-sm);
  transition: color var(--transition-fast);
}
.contact-social-link:hover {
  color: var(--color-accent);
}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  border-top: var(--border);
  padding: var(--space-6) 0;
}

.footer-inner {
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-copy {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-muted);
}
.footer-copy a {
  color: var(--color-accent);
  transition: color var(--transition-fast);
}
.footer-copy a:hover {
  color: var(--color-accent-hover);
}

.footer-year {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-muted);
}

/* ============================================================
   PROJECT PAGES
   ============================================================ */

/* Reading progress bar — CSS Scroll-Driven Animations */
@keyframes reading-progress {
  from { width: 0%; }
  to   { width: 100%; }
}

.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: var(--color-accent);
  z-index: 2000;
  animation: reading-progress linear;
  animation-timeline: scroll(root block);
  width: 0%;
}

@supports not (animation-timeline: scroll()) {
  .progress-bar { display: none; }
}

.project-page {
  padding-top: calc(var(--nav-height) + var(--space-16));
  padding-bottom: var(--space-32);
}

.project-page-inner {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.back-link {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-accent);
  margin-bottom: var(--space-12);
  transition: gap var(--transition-fast);
  gap: var(--space-2);
}
.back-link:hover {
  gap: var(--space-3);
}

.project-page-overline {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-3);
}

.project-page-title {
  font-size: var(--text-4xl);
  font-weight: var(--weight-semibold);
  margin-bottom: var(--space-2);
  line-height: var(--leading-tight);
}

.project-page-subtitle {
  font-size: var(--text-xl);
  color: var(--color-muted);
  margin-bottom: var(--space-6);
}

.project-page-links {
  display: flex;
  gap: var(--space-4);
  margin-top: var(--space-6);
  margin-bottom: var(--space-16);
  padding-bottom: var(--space-8);
  border-bottom: var(--border);
  flex-wrap: wrap;
}

.project-page-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-accent);
  border: 1px solid var(--color-border);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), background var(--transition-fast);
}
.project-page-link:hover {
  border-color: var(--color-accent);
  background: rgba(56, 189, 248, 0.06);
}

.project-section {
  margin-bottom: var(--space-12);
}
.project-section h2 {
  font-size: var(--text-xl);
  font-weight: var(--weight-semibold);
  color: var(--color-text);
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-2);
  border-bottom: 1px solid var(--color-border);
}
.project-section p {
  color: var(--color-muted);
  line-height: var(--leading-normal);
  font-size: var(--text-base);
  margin-bottom: var(--space-3);
}
.project-section ul,
.project-section ol {
  padding-left: var(--space-6);
  list-style: disc;
}
.project-section ol {
  list-style: decimal;
}
.project-section li {
  color: var(--color-muted);
  line-height: var(--leading-normal);
  margin-bottom: var(--space-2);
  font-size: var(--text-base);
}
.project-section strong {
  color: var(--color-text);
  font-weight: var(--weight-semibold);
}

/* Tech stack table on project pages */
.stack-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: var(--space-4);
  font-size: var(--text-sm);
}
.stack-table th {
  text-align: left;
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-accent);
  border-bottom: 1px solid var(--color-border);
  font-weight: var(--weight-medium);
}
.stack-table td {
  padding: var(--space-3) var(--space-4);
  color: var(--color-muted);
  border-bottom: 1px solid rgba(51, 65, 85, 0.5);
  vertical-align: top;
  line-height: var(--leading-normal);
}
.stack-table td:first-child {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text);
  white-space: nowrap;
  width: 160px;
}

/* ============================================================
   RESPONSIVE — MOBILE NAVIGATION (< 768px)
   ============================================================ */
@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .nav-toggle.open .hamburger-bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }
  .nav-toggle.open .hamburger-bar:nth-child(2) {
    opacity: 0;
  }
  .nav-toggle.open .hamburger-bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .nav-menu {
    display: none;
    position: fixed;
    inset: 0;
    background: var(--color-bg);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: var(--space-8);
    z-index: 1000;
  }
  .nav-menu.open {
    display: flex;
  }

  .nav-links {
    flex-direction: column;
    align-items: center;
    gap: var(--space-4);
  }
  .nav-links a {
    font-size: var(--text-xl);
  }
}

/* ============================================================
   RESPONSIVE — HERO (< 768px)
   ============================================================ */
@media (max-width: 768px) {
  .hero-inner {
    grid-template-columns: 1fr;
    text-align: center;
    padding: var(--space-12) var(--space-6);
  }
  .hero-photo-wrap {
    order: -1;
    margin: 0 auto var(--space-8);
  }
  .hero-photo,
  .hero-photo-bg {
    width: 300px;
    height: 300px;
  }
  .hero-tagline {
    max-width: 100%;
  }
  .hero-bio {
    max-width: 100%;
  }
  .hero-actions {
    justify-content: center;
  }
  .status-badge {
    margin: 0 auto var(--space-6);
  }
  .hero-stats {
    justify-content: center;
  }
}

/* ============================================================
   RESPONSIVE — ABOUT (< 768px)
   ============================================================ */
@media (max-width: 768px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
}

/* ============================================================
   RESPONSIVE — EXPERIENCE (< 768px)
   ============================================================ */
@media (max-width: 768px) {
  .experience-tabs {
    grid-template-columns: 1fr;
  }
  .experience-tab-list {
    flex-direction: row;
    border-left: none;
    border-bottom: 2px solid var(--color-border);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }
  .experience-tab-list::-webkit-scrollbar {
    display: none;
  }
  .exp-tab {
    border-left: none;
    border-bottom: 2px solid transparent;
    margin-left: 0;
    margin-bottom: -2px;
    white-space: nowrap;
    flex-shrink: 0;
  }
  .exp-tab.active {
    border-bottom-color: var(--color-accent);
  }
  .experience-panels {
    padding-left: 0;
    padding-top: var(--space-8);
  }
}

/* ============================================================
   RESPONSIVE — PROJECTS (< 768px)
   ============================================================ */
@media (max-width: 768px) {
  .featured-project,
  .featured-project--reverse {
    grid-template-columns: 1fr;
    direction: ltr;
    gap: var(--space-6);
  }
  .featured-project-image {
    order: 0;
  }
  .featured-project-content {
    order: 1;
  }
  .other-projects-grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================================
   RESPONSIVE — PROJECTS (tablet, 768–1024px)
   ============================================================ */
@media (min-width: 768px) and (max-width: 1024px) {
  .featured-project,
  .featured-project--reverse {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-6);
  }
}

/* ============================================================
   RESPONSIVE — GENERAL MOBILE (< 640px)
   ============================================================ */
@media (max-width: 640px) {
  .section {
    padding: var(--section-padding-y-mobile) 0;
  }
  .section-inner {
    padding: 0 var(--space-4);
  }
  .section-title {
    font-size: var(--text-2xl);
  }
  .project-page-title {
    font-size: var(--text-3xl);
  }
}

/* ============================================================
   RESPONSIVE — CONTACT (< 640px)
   ============================================================ */
@media (max-width: 640px) {
  .contact-social {
    flex-direction: column;
    align-items: center;
    gap: var(--space-4);
  }
  .footer-inner {
    flex-direction: column;
    gap: var(--space-2);
    text-align: center;
  }
}

/* ============================================================
   PREFERS-REDUCED-MOTION
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  * {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  .status-dot {
    animation: none;
  }
  .progress-bar {
    display: none;
  }
}

/* ============================================================
   SCREENSHOT GALLERY (project pages)
   ============================================================ */
.gallery-grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-4);
}

.gallery-thumb {
  background: none;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 0;
  cursor: pointer;
  overflow: hidden;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  flex: 0 0 auto;
  width: 160px;
  height: 100px;
}
.gallery-thumb img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: var(--color-surface);
  display: block;
}
.gallery-thumb:hover {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.15);
}
.gallery-thumb:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

/* ============================================================
   SCREENSHOT MODAL
   ============================================================ */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.88);
  z-index: 3000;
  align-items: center;
  justify-content: center;
  padding: var(--space-6);
}
.modal-overlay.open {
  display: flex;
}

.modal-container {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  max-width: 90vw;
  max-height: 90vh;
}

.modal-img {
  max-width: 90vw;
  max-height: 85vh;
  object-fit: contain;
  border-radius: var(--radius-md);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.7);
  display: block;
  user-select: none;
}

.modal-close {
  position: fixed;
  top: var(--space-6);
  right: var(--space-6);
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  color: var(--color-text);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background var(--transition-fast), border-color var(--transition-fast);
  font-size: var(--text-lg);
  line-height: 1;
  backdrop-filter: blur(8px);
}
.modal-close:hover {
  background: var(--color-surface);
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.modal-prev,
.modal-next {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  color: var(--color-text);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background var(--transition-fast), border-color var(--transition-fast);
  backdrop-filter: blur(8px);
}
.modal-prev { left: var(--space-6); }
.modal-next { right: var(--space-6); }
.modal-prev:hover,
.modal-next:hover {
  background: var(--color-surface);
  border-color: var(--color-accent);
  color: var(--color-accent);
}
.modal-prev[hidden],
.modal-next[hidden] {
  display: none;
}

.modal-counter {
  position: fixed;
  bottom: var(--space-6);
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-muted);
  background: rgba(15, 23, 42, 0.7);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  backdrop-filter: blur(8px);
}

@media (max-width: 640px) {
  .modal-prev { left: var(--space-2); }
  .modal-next { right: var(--space-2); }
  .modal-close { top: var(--space-2); right: var(--space-2); }
  .gallery-thumb { width: 120px; height: 80px; }
}