/* =========================================================
   Hrishikesh Kini — Portfolio Design System
   Modern static site: CSS variables for dark/light theming,
   glass cards, timeline, project grid, 3D hero.
   ========================================================= */

/* ---------- Design tokens ---------- */
:root {
  /* Typography */
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-display: "Space Grotesk", "Inter", sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", Consolas, monospace;

  /* Spacing scale */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;
  --space-9: 6rem;

  /* Radii & shadows */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-pill: 999px;
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.12);
  --shadow-lift: 0 16px 48px rgba(0, 0, 0, 0.22);

  /* Layout */
  --container: 1160px;
  --nav-height: 68px;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---------- Dark theme (default) ---------- */
:root,
[data-theme="dark"] {
  --bg: #070b14;
  --bg-soft: #0c1220;
  --bg-card: rgba(255, 255, 255, 0.045);
  --bg-card-hover: rgba(255, 255, 255, 0.08);
  --bg-glass: rgba(10, 16, 30, 0.72);
  --border: rgba(255, 255, 255, 0.09);
  --border-strong: rgba(255, 255, 255, 0.18);

  --text: #e8edf5;
  --text-muted: #94a3b8;
  --text-faint: #64748b;

  --accent: #4f8cff;
  --accent-2: #a855f7;
  --accent-grad: linear-gradient(135deg, #4f8cff 0%, #a855f7 100%);
  --accent-soft: rgba(79, 140, 255, 0.14);
  --accent-text-on: #ffffff;

  --glow: radial-gradient(ellipse 60% 50% at 50% -10%, rgba(79, 140, 255, 0.22), transparent 70%);

  --canvas-hero: #070b14;
  --particle: #6ea8ff;
  --particle-alt: #c084fc;

  --scrollbar-track: #0a0f1a;
  --scrollbar-thumb: #243045;
  --scrollbar-thumb-hover: #334562;
}

/* ---------- Light theme ---------- */
[data-theme="light"] {
  --bg: #f6f8fc;
  --bg-soft: #eef2f9;
  --bg-card: rgba(15, 23, 42, 0.035);
  --bg-card-hover: rgba(15, 23, 42, 0.07);
  --bg-glass: rgba(255, 255, 255, 0.82);
  --border: rgba(15, 23, 42, 0.1);
  --border-strong: rgba(15, 23, 42, 0.2);

  --text: #101828;
  --text-muted: #475569;
  --text-faint: #667085;

  --accent: #2f6bff;
  --accent-2: #7c3aed;
  --accent-grad: linear-gradient(135deg, #2f6bff 0%, #7c3aed 100%);
  --accent-soft: rgba(47, 107, 255, 0.1);
  --accent-text-on: #ffffff;

  --glow: radial-gradient(ellipse 60% 50% at 50% -10%, rgba(47, 107, 255, 0.12), transparent 70%);

  --canvas-hero: #f6f8fc;
  --particle: #2f6bff;
  --particle-alt: #7c3aed;

  --scrollbar-track: #eef1f7;
  --scrollbar-thumb: #c6cfdd;
  --scrollbar-thumb-hover: #9aa7ba;
}

/* ---------- Reset & base ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-height) + 12px);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  font-size: 16px;
  overflow-x: hidden;
  transition: background var(--transition), color var(--transition);
}

body::before {
  /* Ambient top glow behind hero */
  content: "";
  position: fixed;
  inset: 0;
  background: var(--glow);
  pointer-events: none;
  z-index: 0;
}

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

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--accent-2);
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  line-height: 1.2;
  letter-spacing: -0.02em;
  font-weight: 700;
}

ul {
  list-style: none;
}

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

/* Scrollbar */
::-webkit-scrollbar {
  width: 10px;
}
::-webkit-scrollbar-track {
  background: var(--scrollbar-track);
}
::-webkit-scrollbar-thumb {
  background: var(--scrollbar-thumb);
  border-radius: 6px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--scrollbar-thumb-hover);
}

/* Focus visibility */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- Utility classes ---------- */
.container {
  width: min(var(--container), 100% - 3rem);
  margin-inline: auto;
}

.section {
  position: relative;
  padding-block: var(--space-9);
  z-index: 1;
}

.section--soft {
  background: var(--bg-soft);
  transition: background var(--transition);
}

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  margin-bottom: var(--space-3);
}

.section-title .gradient-text {
  background: var(--accent-grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.section-kicker {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-3);
}

.section-sub {
  color: var(--text-muted);
  max-width: 640px;
  margin-bottom: var(--space-7);
}

.gradient-text {
  background: var(--accent-grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------- Navigation ---------- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 100;
  display: flex;
  align-items: center;
  background: transparent;
  transition: background var(--transition), box-shadow var(--transition), backdrop-filter var(--transition);
}

.nav.is-scrolled {
  background: var(--bg-glass);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 1px 0 var(--border);
}

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

.nav-logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text);
  letter-spacing: -0.03em;
}

.nav-logo .gradient-text {
  font-size: inherit;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-5);
}

.nav-links a {
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 500;
  padding: var(--space-2) 0;
  position: relative;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  height: 2px;
  width: 0;
  background: var(--accent-grad);
  border-radius: 2px;
  transition: width var(--transition);
}

.nav-links a:hover,
.nav-links a.is-active {
  color: var(--text);
}

.nav-links a:hover::after,
.nav-links a.is-active::after {
  width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* Theme toggle button */
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text);
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
}

.theme-toggle:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-strong);
  transform: translateY(-1px);
}

.theme-toggle .icon-sun,
.theme-toggle .icon-moon {
  display: none;
}

[data-theme="dark"] .theme-toggle .icon-sun {
  display: block;
}
[data-theme="dark"] .theme-toggle .icon-moon {
  display: none;
}

[data-theme="light"] .theme-toggle .icon-sun {
  display: none;
}
[data-theme="light"] .theme-toggle .icon-moon {
  display: block;
}

/* Mobile nav toggle */
.nav-burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
}

.nav-burger span {
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

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

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding-top: var(--nav-height);
  overflow: hidden;
  z-index: 1;
}

.hero-canvas {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-canvas canvas {
  display: block;
  width: 100%;
  height: 100%;
}

/* Static monogram shown until/unless the 3D particle logo takes over */
.logo-fallback {
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(5rem, 14vw, 10rem);
  letter-spacing: -0.04em;
  line-height: 1;
  margin-bottom: var(--space-4);
  user-select: none;
}

body.logo3d-active .logo-fallback {
  display: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-5);
  padding-block: var(--space-8);
  pointer-events: none;
}

.hero-content > * {
  pointer-events: auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-pill);
  background: var(--bg-card);
  border: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--text-muted);
  backdrop-filter: blur(8px);
}

.hero-badge .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #34d399;
  box-shadow: 0 0 8px #34d399;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.4;
  }
}

.hero-title {
  font-size: clamp(2.4rem, 6vw, 4.5rem);
  letter-spacing: -0.04em;
}

.hero-subtitle {
  font-size: clamp(1.05rem, 2vw, 1.35rem);
  color: var(--text-muted);
  max-width: 680px;
}

.hero-cta {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
  justify-content: center;
  margin-top: var(--space-2);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.8rem 1.6rem;
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition),
    background var(--transition), border-color var(--transition);
}

.btn:active {
  transform: translateY(1px);
}

.btn--primary {
  background: var(--accent-grad);
  color: var(--accent-text-on);
  box-shadow: 0 8px 24px var(--accent-soft);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px var(--accent-soft);
  color: var(--accent-text-on);
}

.btn--ghost {
  background: var(--bg-card);
  border-color: var(--border);
  color: var(--text);
}

.btn--ghost:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-strong);
  transform: translateY(-2px);
}

/* ---------- Social icons row ---------- */
.social-row {
  display: flex;
  gap: var(--space-3);
  justify-content: center;
}

.social-row a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: var(--radius-pill);
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-muted);
  transition: transform var(--transition), color var(--transition),
    border-color var(--transition), background var(--transition);
}

.social-row a:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-soft);
  transform: translateY(-3px);
}

.social-row svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

/* ---------- Glass card base ---------- */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: background var(--transition), border-color var(--transition),
    transform var(--transition), box-shadow var(--transition);
}

.card--hover:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-strong);
  transform: translateY(-6px);
  box-shadow: var(--shadow-lift);
}

/* ---------- About section ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--space-8);
  align-items: start;
}

.about-photo {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--bg-card);
}

.about-photo img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
}

.about-photo::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(7, 11, 20, 0.55) 100%);
}

.about-text p {
  color: var(--text-muted);
  margin-bottom: var(--space-4);
}

.about-text strong,
.about-text b {
  color: var(--text);
}

/* Skill chips */
.chip-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-5);
}

.chip {
  display: inline-flex;
  align-items: center;
  padding: 0.4rem 0.9rem;
  border-radius: var(--radius-pill);
  font-size: 0.83rem;
  font-weight: 500;
  font-family: var(--font-mono);
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-muted);
  transition: color var(--transition), border-color var(--transition),
    background var(--transition), transform var(--transition);
}

.chip:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-soft);
  transform: translateY(-2px);
}

/* Skill category blocks */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-5);
}

.skill-card {
  padding: var(--space-5);
}

.skill-card h3 {
  font-size: 1.05rem;
  margin-bottom: var(--space-3);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.skill-card h3::before {
  content: "";
  width: 10px;
  height: 10px;
  border-radius: 3px;
  background: var(--accent-grad);
  flex-shrink: 0;
}

/* ---------- Experience timeline ---------- */
.timeline {
  position: relative;
  padding-left: 2rem;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: linear-gradient(180deg, var(--accent), var(--accent-2));
  opacity: 0.5;
  border-radius: 2px;
}

.timeline-item {
  position: relative;
  padding-bottom: var(--space-7);
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -2rem;
  top: 6px;
  width: 12px;
  height: 12px;
  margin-left: -5px;
  border-radius: 50%;
  background: var(--bg);
  border: 3px solid var(--accent);
  box-shadow: 0 0 12px var(--accent-soft);
}

.timeline-card {
  padding: var(--space-6);
}

.timeline-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
}

.timeline-head h3 {
  font-size: 1.3rem;
}

.timeline-company {
  color: var(--accent);
  font-weight: 600;
}

.timeline-meta {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-faint);
  margin-bottom: var(--space-4);
}

.timeline-card ul {
  display: grid;
  gap: var(--space-2);
}

.timeline-card li {
  color: var(--text-muted);
  padding-left: 1.2rem;
  position: relative;
  font-size: 0.95rem;
}

.timeline-card li::before {
  content: "▹";
  position: absolute;
  left: 0;
  color: var(--accent);
}

/* ---------- Projects grid ---------- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
}

.filter-btn {
  padding: 0.45rem 1.1rem;
  border-radius: var(--radius-pill);
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.88rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
}

.filter-btn:hover {
  color: var(--text);
  border-color: var(--border-strong);
}

.filter-btn.is-active {
  background: var(--accent-grad);
  color: var(--accent-text-on);
  border-color: transparent;
  box-shadow: 0 6px 18px var(--accent-soft);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--space-5);
}

.project-card {
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.project-card.is-hidden {
  display: none;
}

.project-thumb {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--bg-soft);
}

.project-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.45s ease;
}

.project-card:hover .project-thumb img {
  transform: scale(1.06);
}

.project-thumb .thumb-fallback {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--text-faint);
  background: var(--accent-grad);
  opacity: 0.85;
  -webkit-background-clip: unset;
  background-clip: unset;
  color: rgba(255, 255, 255, 0.85);
}

.project-body {
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  flex: 1;
}

.project-body h3 {
  font-size: 1.12rem;
}

.project-body h3 a {
  color: var(--text);
}

.project-body h3 a:hover {
  color: var(--accent);
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: auto;
}

.project-tags .chip {
  font-size: 0.72rem;
  padding: 0.25rem 0.65rem;
}

/* ---------- Education ---------- */
.edu-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-5);
}

.edu-card {
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.edu-card h3 {
  font-size: 1.08rem;
}

.edu-card .edu-meta {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-faint);
}

.edu-card p {
  color: var(--text-muted);
  font-size: 0.92rem;
}

/* ---------- Contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-5);
}

.contact-card {
  padding: var(--space-5);
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
}

.contact-icon {
  flex-shrink: 0;
  width: 46px;
  height: 46px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-soft);
  color: var(--accent);
}

.contact-icon svg {
  width: 22px;
  height: 22px;
  fill: currentColor;
}

.contact-card h3 {
  font-size: 0.95rem;
  margin-bottom: var(--space-1);
}

.contact-card a,
.contact-card span {
  color: var(--text-muted);
  font-size: 0.92rem;
  word-break: break-word;
}

.contact-card a:hover {
  color: var(--accent);
}

/* ---------- Footer ---------- */
.footer {
  padding: var(--space-6) 0;
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--text-faint);
  font-size: 0.88rem;
  position: relative;
  z-index: 1;
}

.footer .social-row {
  margin-bottom: var(--space-4);
}

/* ---------- Scroll reveal animations ---------- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

.reveal-delay-1 {
  transition-delay: 0.08s;
}
.reveal-delay-2 {
  transition-delay: 0.16s;
}
.reveal-delay-3 {
  transition-delay: 0.24s;
}

/* ---------- Project detail pages ---------- */
.project-page {
  padding-top: calc(var(--nav-height) + var(--space-6));
  min-height: 100vh;
}

.project-page .back-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--text-muted);
  font-size: 0.92rem;
  margin-bottom: var(--space-6);
  transition: color var(--transition);
}

.project-page .back-link:hover {
  color: var(--accent);
}

.project-hero {
  margin-bottom: var(--space-7);
}

.project-hero h1 {
  font-size: clamp(1.9rem, 4vw, 2.8rem);
  margin-bottom: var(--space-3);
}

.project-hero .project-tags {
  margin-top: var(--space-4);
  margin-bottom: 0;
}

.project-content {
  max-width: 800px;
}

.project-content h2 {
  font-size: 1.4rem;
  margin: var(--space-7) 0 var(--space-3);
}

.project-content h3 {
  font-size: 1.1rem;
  margin: var(--space-5) 0 var(--space-2);
}

.project-content p {
  color: var(--text-muted);
  margin-bottom: var(--space-4);
}

.project-content ul {
  display: grid;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.project-content li {
  color: var(--text-muted);
  padding-left: 1.3rem;
  position: relative;
}

.project-content li::before {
  content: "▹";
  position: absolute;
  left: 0;
  color: var(--accent);
}

.project-content img {
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  margin-block: var(--space-4);
  width: 100%;
}

.project-content code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.15em 0.45em;
}

.project-content pre {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  overflow-x: auto;
  margin-bottom: var(--space-4);
}

.project-content pre code {
  background: none;
  border: none;
  padding: 0;
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin: var(--space-6) 0;
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .about-photo {
    max-width: 320px;
  }
}

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--bg-glass);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    padding: var(--space-3) var(--space-5) var(--space-5);
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
  }

  .nav-links.is-open {
    opacity: 1;
    visibility: visible;
    transform: none;
  }

  .nav-links a {
    padding: var(--space-3) 0;
    font-size: 1rem;
    border-bottom: 1px solid var(--border);
  }

  .nav-links li:last-child a {
    border-bottom: none;
  }

  .nav-burger {
    display: flex;
  }

  .timeline {
    padding-left: 1.6rem;
  }

  .timeline-item::before {
    left: -1.6rem;
  }

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

@media (max-width: 480px) {
  .hero-cta .btn {
    width: 100%;
    justify-content: center;
  }

  .btn-row .btn {
    width: 100%;
    justify-content: center;
  }
}

/* ---------- Project card link icons ---------- */
.project-links {
  display: flex;
  gap: 0.5rem;
  margin-top: var(--space-3);
}

.card-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  background: var(--bg-elev);
  border: 1px solid var(--border);
  transition: background var(--transition), transform var(--transition),
    border-color var(--transition);
}

.card-link svg {
  width: 16px;
  height: 16px;
  fill: var(--text-secondary);
}

.card-link:hover {
  background: var(--bg-accent);
  border-color: var(--accent);
  transform: translateY(-2px);
}

.card-link:hover svg {
  fill: var(--accent);
}

/* ---------- Blog section ---------- */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-5);
  margin-bottom: var(--space-6);
}

.blog-card {
  display: flex;
  flex-direction: column;
  padding: var(--space-5);
}

.blog-date {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-2);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.blog-card h3 {
  font-size: 1.1rem;
  margin-bottom: var(--space-3);
}

.blog-card h3 a {
  color: var(--text-primary);
  text-decoration: none;
}

.blog-card h3 a:hover {
  color: var(--accent);
}

.blog-excerpt {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: var(--space-4);
  flex-grow: 1;
}

.blog-link {
  font-size: 0.9rem;
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
}

.blog-link:hover {
  text-decoration: underline;
}

.blog-fallback {
  text-align: center;
  color: var(--text-secondary);
}

/* ---------- Contact resume CTA ---------- */
.contact-cta {
  margin-top: var(--space-6);
  text-align: center;
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }

  .hero-canvas {
    display: none;
  }
}