/* ============================================================
   CSS CUSTOM PROPERTIES
   ============================================================ */
:root {
  /* DARK theme — default */
  --bg: #0d0d0d;
  --bg-alt: #141414;
  --surface: #191919;
  --text: #ede9e3;
  --text-muted: rgba(237, 233, 227, .52);
  --text-light: rgba(237, 233, 227, .28);
  --accent: #3ddc84;
  --accent-hover: #2bc972;
  --border: rgba(237, 233, 227, .1);
  --header-scrolled: rgba(13, 13, 13, .92);

  --font: 'Inter', system-ui, -apple-system, sans-serif;
  --fs-xs: 0.75rem;
  --fs-sm: 0.875rem;
  --fs-base: 1rem;
  --fs-lg: 1.125rem;
  --fs-xl: 1.25rem;
  --fs-2xl: 1.5rem;
  --fs-3xl: 2rem;
  --fs-4xl: 3rem;

  --space-xs: .5rem;
  --space-sm: 1rem;
  --space-md: 1.75rem;
  --space-lg: 3rem;
  --space-xl: 5rem;
  --space-2xl: 8rem;

  --radius: .5rem;
  --radius-sm: .35rem;
  --radius-full: 999px;
  --transition: .22s ease;
  --max-w: 1060px;
  --narrow-w: 680px;
  --header-h: 64px;
}

/* LIGHT theme override */
body.light-mode {
  --bg: #faf9f7;
  --bg-alt: #f2f0ec;
  --surface: #ffffff;
  --text: #1a1a1a;
  --text-muted: #6b6b6b;
  --text-light: #9a9a9a;
  --accent: #16a34a;
  --accent-hover: #15803d;
  --border: #e4e1db;
  --header-scrolled: rgba(250, 249, 247, .93);
}

/* ============================================================
   SKIP LINK (keyboard accessibility)
   ============================================================ */
.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  z-index: 10000;
  background: var(--accent);
  color: var(--bg);
  padding: .5rem 1.25rem;
  border-radius: var(--radius);
  font-size: var(--fs-sm);
  font-weight: 600;
  text-decoration: none;
  transition: top .15s ease;
}

.skip-link:focus {
  top: 1rem;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font);
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  transition: background-color .3s ease, color .3s ease;
}

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

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

ul {
  list-style: none;
}

/* Inner pages entrance animation */
.page-inner main {
  animation: pageFadeIn .4s ease both;
}

@keyframes pageFadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============================================================
   LAYOUT
   ============================================================ */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: var(--space-md);
}

.section-inner {
  max-width: var(--narrow-w);
}

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

.site-header.scrolled {
  background-color: var(--header-scrolled);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom-color: var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.logo {
  font-size: var(--fs-base);
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--text);
  transition: color var(--transition);
}

.logo:hover {
  color: var(--accent);
}

/* Nav links */
.main-nav ul {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.main-nav a {
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--text-muted);
  position: relative;
  transition: color var(--transition);
}

.main-nav a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -3px;
  width: 0;
  height: 1px;
  background: var(--text);
  transition: width var(--transition);
}

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

.main-nav a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}

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

/* ============================================================
   LANGUAGE SWITCHER
   ============================================================ */
.lang-switcher {
  display: flex;
  align-items: center;
  gap: .25rem;
}

.lang-btn {
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--font);
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--text-muted);
  padding: 2px 6px;
  position: relative;
  transition: color var(--transition);
  min-height: 44px;
}

.lang-btn::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 1.5px;
  background: var(--text);
  transition: width var(--transition);
}

.lang-btn[aria-pressed="true"] {
  color: var(--text);
}

.lang-btn[aria-pressed="true"]::after {
  width: 100%;
}

.lang-btn:hover {
  color: var(--text);
}

.lang-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}

.lang-sep {
  font-size: var(--fs-xs);
  color: var(--border);
  user-select: none;
}

/* ============================================================
   THEME TOGGLE
   ============================================================ */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  padding: 4px;
  border-radius: var(--radius-sm);
  transition: color var(--transition);
  flex-shrink: 0;
  min-width: 44px;
  min-height: 44px;
}

.theme-toggle:hover {
  color: var(--text);
}

.theme-toggle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* Icon visibility: dark mode shows sun, light mode shows moon */
.icon-sun {
  display: flex;
}

.icon-moon {
  display: none;
}

body.light-mode .icon-sun {
  display: none;
}

body.light-mode .icon-moon {
  display: flex;
}

/* ============================================================
   HAMBURGER (mobile)
   ============================================================ */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  min-width: 44px;
  min-height: 44px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--text);
  border-radius: 2px;
  transition: transform .28s, opacity .28s;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* ============================================================
   HERO  (index.html)
   ============================================================ */
.hero-home {
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--header-h) var(--space-md) var(--space-lg);
  position: relative;
  overflow: hidden;
}

.hero-home::before {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(ellipse 900px 700px at 50% 35%,
      rgba(61, 220, 132, .06) 0%, transparent 68%);
}

body.light-mode .hero-home::before {
  background: radial-gradient(ellipse 900px 700px at 50% 35%,
      rgba(22, 163, 74, .05) 0%, transparent 68%);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 640px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero-eyebrow {
  font-size: var(--fs-base);
  font-weight: 400;
  font-style: italic;
  color: var(--text-muted);
  margin-bottom: .35rem;
}

.hero-name {
  font-size: clamp(4rem, 16vw, 8.5rem);
  font-weight: 800;
  letter-spacing: -.045em;
  line-height: 1;
  color: var(--text);
  margin-bottom: .4rem;
}

.hero-name-accent {
  display: block;
  width: 48px;
  height: 3px;
  background: var(--accent);
  border-radius: 2px;
  margin: 0 auto 1.4rem;
}

.hero-role {
  font-size: var(--fs-xl);
  font-weight: 600;
  color: var(--text);
  letter-spacing: -.01em;
  margin-bottom: .75rem;
}

.hero-tagline {
  font-size: var(--fs-base);
  color: var(--text-muted);
  line-height: 1.75;
  max-width: 440px;
  margin-bottom: 2.25rem;
}

.hero-btns {
  display: flex;
  flex-wrap: wrap;
  gap: .85rem;
  justify-content: center;
}

.home-btn {
  display: inline-flex;
  align-items: center;
  padding: .75rem 2rem;
  border-radius: var(--radius-full);
  border: 1.5px solid var(--text);
  font-family: var(--font);
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--text);
  letter-spacing: .025em;
  cursor: pointer;
  transition: background var(--transition), color var(--transition),
    border-color var(--transition), transform var(--transition);
}

.home-btn:hover {
  background: var(--text);
  color: var(--bg);
  transform: translateY(-2px);
}

.home-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* ============================================================
   INNER PAGES — shared section layout
   ============================================================ */
.page-section {
  padding-block: var(--space-xl);
  padding-top: calc(var(--header-h) + var(--space-xl));
}

.section-label {
  display: inline-block;
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-xs);
}

.section-title {
  font-size: var(--fs-3xl);
  font-weight: 800;
  letter-spacing: -.03em;
  line-height: 1.1;
  color: var(--text);
  margin-bottom: var(--space-md);
}

/* ============================================================
   ABOUT
   ============================================================ */
.about-story {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.about-story p {
  font-size: var(--fs-lg);
  color: var(--text-muted);
  line-height: 1.8;
}

.about-facts {
  display: flex;
  flex-direction: column;
  gap: .55rem;
  padding: var(--space-md) 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.about-facts li {
  display: flex;
  gap: 1.25rem;
  font-size: var(--fs-sm);
}

.fact-key {
  min-width: 110px;
  font-weight: 600;
  color: var(--text);
  flex-shrink: 0;
}

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

.text-link {
  display: inline-block;
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--accent);
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
  transition: border-color var(--transition);
}

.text-link:hover {
  border-color: var(--accent);
}

/* ============================================================
   PROJECTS
   ============================================================ */
.projects-intro {
  font-size: var(--fs-lg);
  color: var(--text-muted);
  margin-bottom: var(--space-lg);
  max-width: var(--narrow-w);
  line-height: 1.8;
}

.projects-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  max-width: var(--max-w);
}

.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: .75rem;
  transition: border-color var(--transition), transform var(--transition);
}

.project-card:hover {
  border-color: var(--text-light);
  transform: translateY(-3px);
}

.project-name {
  font-size: var(--fs-xl);
  font-weight: 700;
  letter-spacing: -.02em;
  line-height: 1.25;
  color: var(--text);
}

.project-desc {
  font-size: var(--fs-sm);
  color: var(--text-muted);
  line-height: 1.75;
  flex: 1;
}

.project-stack {
  font-size: var(--fs-xs);
  color: var(--text-light);
  letter-spacing: .01em;
}

.project-link {
  display: inline-block;
  align-self: flex-start;
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--accent);
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
  transition: border-color var(--transition);
}

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

/* ============================================================
   SKILLS
   ============================================================ */
.skills-block {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  max-width: var(--max-w);
}

.skill-group {
  display: flex;
  flex-direction: column;
  gap: .65rem;
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--border);
}

.skill-group:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.skill-cat {
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.badges {
  display: flex;
  flex-wrap: wrap;
  gap: .45rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  font-size: var(--fs-xs);
  font-weight: 500;
  color: var(--text);
  background-color: var(--bg-alt);
  border: 1px solid var(--border);
  padding: .3rem .8rem;
  border-radius: var(--radius-sm);
  letter-spacing: .01em;
  transition: border-color var(--transition), transform var(--transition);
}

.badge:hover {
  border-color: var(--text-light);
  transform: translateY(-1px);
}

/* ============================================================
   CONTACT
   ============================================================ */
.contact-sub {
  font-size: var(--fs-lg);
  color: var(--text-muted);
  margin-bottom: var(--space-md);
  line-height: 1.75;
}

.contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: .85rem;
}

.contact-btn {
  display: inline-flex;
  align-items: center;
  font-family: var(--font);
  font-size: var(--fs-sm);
  font-weight: 600;
  border-radius: var(--radius-sm);
  padding: .65rem 1.4rem;
  cursor: pointer;
  border: 1.5px solid transparent;
  transition: background var(--transition), color var(--transition), border-color var(--transition), transform var(--transition);
}

.contact-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.contact-btn-primary {
  background-color: var(--text);
  color: var(--bg);
  border-color: var(--text);
}

.contact-btn-primary:hover {
  background-color: var(--accent);
  border-color: var(--accent);
  transform: translateY(-2px);
}

.contact-btn-ghost {
  background-color: transparent;
  color: var(--text);
  border-color: var(--border);
}

.contact-btn-ghost:hover {
  border-color: var(--text-muted);
  background-color: var(--bg-alt);
  transform: translateY(-2px);
}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  border-top: 1px solid var(--border);
  padding-block: var(--space-md);
  background: var(--bg);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-xs);
}

.footer-inner p {
  font-size: var(--fs-xs);
  color: var(--text-muted);
}

.back-top {
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--text-muted);
  transition: color var(--transition);
}

.back-top:hover {
  color: var(--text);
}

/* ============================================================
   SCROLL REVEAL
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .4s ease, transform .4s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-stagger>* {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .35s ease, transform .35s ease;
}

.reveal-stagger.visible>* {
  opacity: 1;
  transform: translateY(0);
}

.reveal-stagger.visible>*:nth-child(1) {
  transition-delay: .05s;
}

.reveal-stagger.visible>*:nth-child(2) {
  transition-delay: .15s;
}

.reveal-stagger.visible>*:nth-child(3) {
  transition-delay: .25s;
}

.reveal-stagger.visible>*:nth-child(4) {
  transition-delay: .35s;
}

.reveal-stagger.visible>*:nth-child(5) {
  transition-delay: .45s;
}

/* ============================================================
   HERO STATS
   ============================================================ */
.hero-stats {
  display: flex;
  gap: 2.5rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 2rem;
}

.hero-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .2rem;
}

.stat-value {
  font-size: var(--fs-2xl);
  font-weight: 800;
  color: var(--text);
  letter-spacing: -.02em;
  line-height: 1;
}

.stat-label {
  font-size: var(--fs-xs);
  color: var(--text-muted);
  letter-spacing: .06em;
  text-transform: uppercase;
}

/* ============================================================
   SCROLL INDICATOR
   ============================================================ */
.scroll-indicator {
  position: absolute;
  bottom: 2.25rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .3rem;
  color: var(--text-light);
  animation: scrollBounce 2.2s ease-in-out infinite;
  cursor: default;
  user-select: none;
}

.scroll-indicator span {
  font-size: var(--fs-xs);
  letter-spacing: .1em;
  text-transform: uppercase;
}

@keyframes scrollBounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%       { transform: translateX(-50%) translateY(7px); }
}

/* ============================================================
   AVATAR + ABOUT LAYOUT
   ============================================================ */
.about-layout {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-lg);
  align-items: start;
}

.avatar-col {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
}

.avatar-photo {
  width: 80px;
  height: 104px;
  border-radius: 6px;
  border: 2px solid var(--accent);
  object-fit: cover;
  object-position: center top;
  flex-shrink: 0;
}

.avatar-available {
  display: flex;
  align-items: center;
  gap: .4rem;
  font-size: var(--fs-xs);
  color: var(--accent);
  font-weight: 600;
  white-space: nowrap;
}

.avail-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: .5; transform: scale(.85); }
}

.cv-downloads {
  display: flex;
  gap: var(--space-sm);
  margin-top: var(--space-md);
  flex-wrap: wrap;
}

.btn-cv {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .45rem .9rem;
  border: 1.5px solid var(--accent);
  border-radius: 6px;
  color: var(--accent);
  font-size: var(--fs-sm);
  font-weight: 600;
  text-decoration: none;
  transition: background .2s, color .2s;
}

.btn-cv:hover {
  background: var(--accent);
  color: var(--bg);
}

@media (max-width: 640px) {
  .about-layout {
    grid-template-columns: 1fr;
  }
  .avatar-col {
    flex-direction: row;
    justify-content: flex-start;
  }
  .avatar-photo {
    width: 60px;
    height: 78px;
  }
}

/* ============================================================
   EXPERIENCE TIMELINE
   ============================================================ */
.section-subtitle {
  font-size: var(--fs-xl);
  font-weight: 700;
  letter-spacing: -.02em;
  color: var(--text);
  margin-bottom: var(--space-md);
  margin-top: var(--space-lg);
}

.experience-timeline {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.timeline-item {
  display: grid;
  grid-template-columns: 14px 1fr;
  gap: 0 1.25rem;
  position: relative;
  padding-bottom: var(--space-md);
}

.timeline-item:not(:last-child) .timeline-dot::after {
  content: '';
  position: absolute;
  left: 6px;
  top: 14px;
  bottom: 0;
  width: 2px;
  background: var(--border);
}

.timeline-dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 2px solid var(--accent);
  background: var(--bg);
  flex-shrink: 0;
  margin-top: 3px;
  position: relative;
  z-index: 1;
}

.timeline-period {
  display: block;
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: .05em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: .2rem;
}

.timeline-role {
  font-size: var(--fs-lg);
  font-weight: 700;
  color: var(--text);
  letter-spacing: -.01em;
  margin-bottom: .15rem;
}

.timeline-place {
  font-size: var(--fs-sm);
  color: var(--text-muted);
  margin-bottom: .5rem;
}

.timeline-desc {
  font-size: var(--fs-sm);
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: .65rem;
}

.timeline-tags {
  display: flex;
  flex-wrap: wrap;
  gap: .35rem;
}

.timeline-tag {
  font-size: var(--fs-xs);
  font-weight: 500;
  color: var(--text-muted);
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: .15rem .5rem;
}

/* ============================================================
   LANGUAGES (about)
   ============================================================ */
.lang-grid {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.lang-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: .75rem 1.25rem;
  min-width: 150px;
}

.lang-name {
  font-size: var(--fs-base);
  font-weight: 700;
  color: var(--text);
  margin-bottom: .2rem;
}

.lang-level {
  font-size: var(--fs-xs);
  color: var(--accent);
  font-weight: 600;
  letter-spacing: .04em;
}

.lang-sub {
  font-size: var(--fs-xs);
  color: var(--text-light);
  margin-top: .1rem;
}

/* ============================================================
   SKILL PROFICIENCY DOTS
   ============================================================ */
.badge.lvl-3::after { content: '●●●'; color: var(--accent); font-size: 6px; margin-left: 5px; vertical-align: middle; opacity: .9; }
.badge.lvl-2::after { content: '●●○'; color: var(--accent); font-size: 6px; margin-left: 5px; vertical-align: middle; opacity: .9; }
.badge.lvl-1::after { content: '●○○'; color: var(--accent); font-size: 6px; margin-left: 5px; vertical-align: middle; opacity: .9; }

.badge .skill-icon {
  width: 14px;
  height: 14px;
  object-fit: contain;
  margin-right: 4px;
  vertical-align: middle;
  position: relative;
  top: -1px;
}

/* ============================================================
   CONTACT — availability + cards
   ============================================================ */
.contact-availability {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  padding: .4rem 1rem;
  margin-bottom: var(--space-md);
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--accent);
}

.contact-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin-top: var(--space-md);
}

.contact-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem var(--space-md);
  display: flex;
  flex-direction: column;
  gap: .35rem;
  transition: border-color var(--transition), transform var(--transition);
  text-decoration: none;
}

.contact-card:hover {
  border-color: var(--text-light);
  transform: translateY(-3px);
}

.contact-card:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.contact-card-label {
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.contact-card-value {
  font-size: var(--fs-base);
  font-weight: 600;
  color: var(--text);
  word-break: break-all;
}

.contact-card-sub {
  font-size: var(--fs-xs);
  color: var(--text-light);
}

/* ============================================================
   GRAPH SECTION HEADER (projects page)
   ============================================================ */
.graph-section-header {
  padding-block: var(--space-md);
  border-top: 1px solid var(--border);
}

.graph-subtitle-text {
  font-size: var(--fs-sm);
  color: var(--text-muted);
  margin-top: .35rem;
}

/* ============================================================
   INTRO OVERLAY
   ============================================================ */
#intro-overlay {
  position: fixed;
  inset: 0;
  background: #000;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 1;
  transition: opacity 0.45s ease;
}

#intro-overlay.intro-out {
  opacity: 0;
  pointer-events: none;
}

.intro-logo-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
}

.intro-logo {
  width: 140px;
  height: 140px;
  object-fit: contain;
  animation: introLogoAnim 2.8s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
}

@keyframes introLogoAnim {
  0% {
    opacity: 0;
    transform: scale(0.82);
    filter: drop-shadow(0 0 0px #00ff41);
  }
  28% {
    opacity: 1;
    transform: scale(1);
    filter: drop-shadow(0 0 16px #00ff41) drop-shadow(0 0 36px rgba(0, 255, 65, 0.45));
  }
  62% {
    opacity: 1;
    transform: scale(1.01);
    filter: drop-shadow(0 0 26px #00ff41)
            drop-shadow(0 0 55px rgba(0, 255, 65, 0.55))
            drop-shadow(0 0 80px rgba(0, 255, 65, 0.25));
  }
  85% {
    opacity: 1;
    transform: scale(1.04);
    filter: drop-shadow(0 0 20px #00ff41) drop-shadow(0 0 42px rgba(0, 255, 65, 0.5));
  }
  100% {
    opacity: 0;
    transform: scale(1.1);
    filter: drop-shadow(0 0 0px #00ff41);
  }
}

/* ============================================================
   RESPONSIVE — tablet ≥640px
   ============================================================ */
@media (min-width: 640px) {
  .projects-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .projects-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .skills-block {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md) var(--space-lg);
  }

  .skill-group {
    padding-bottom: var(--space-sm);
  }
}

/* ============================================================
   RESPONSIVE — mobile menu <768px
   ============================================================ */
@media (max-width: 767px) {
  /* Header: always solid background on mobile so logo + hamburger are
     visible even before the user scrolls (before .scrolled is applied) */
  .site-header {
    background-color: var(--bg);
    border-bottom-color: var(--border);
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
  }

  .nav-toggle {
    display: flex;
  }

  .main-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: var(--space-md);
    transform: translateY(-130%);
    transition: transform .28s ease;
    z-index: 999;
  }

  .main-nav.open {
    transform: translateY(0);
  }

  .main-nav ul {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-sm);
  }

  .main-nav a {
    font-size: var(--fs-base);
    color: var(--text);
  }

  .hero-btns {
    flex-direction: column;
    align-items: center;
  }

  .home-btn {
    width: 100%;
    max-width: 260px;
    justify-content: center;
  }

  .section-title {
    font-size: var(--fs-2xl);
  }

  .about-story p,
  .contact-sub {
    font-size: var(--fs-base);
  }
}

/* ============================================================
   RESPONSIVE — full mobile improvements
   ============================================================ */

/* Prevent horizontal scroll — applied to main/footer only so the
   fixed header is never clipped by an overflow context */
main,
.site-footer {
  overflow-x: hidden;
}

/* Skills section inside projects.html: it is NOT the first section,
   so it must NOT compensate for the fixed header height */
[data-page="projects"] #skills {
  padding-top: var(--space-xl);
}

/* Reduce section vertical padding on mobile so pages feel tighter */
@media (max-width: 767px) {
  .page-section {
    padding-block: var(--space-lg);
    padding-top: calc(var(--header-h) + var(--space-lg));
  }

  /* Override also the non-first skills section on projects page */
  [data-page="projects"] #skills {
    padding-top: var(--space-lg);
  }

  /* Reduce subtitle top gap */
  .section-subtitle {
    margin-top: var(--space-md);
  }

  /* Reduce intro text size */
  .projects-intro {
    font-size: var(--fs-base);
  }

  /* Tighter stats row */
  .hero-stats {
    gap: 1.5rem;
  }

  /* Graph section header padding */
  .graph-section-header {
    padding-block: var(--space-sm);
  }
}

/* Graph canvas: shorter on phones so it doesn't swallow the screen */
@media (max-width: 640px) {
  .graph-wrapper {
    height: 380px;
  }
}

/* Contact cards and lang cards on small screens */
@media (max-width: 480px) {
  .contact-cards {
    grid-template-columns: 1fr;
  }

  .lang-card {
    min-width: 120px;
    flex: 1;
  }

  /* CV download buttons stack vertically */
  .cv-downloads {
    flex-direction: column;
  }

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

/* Header: keep logo readable on very small screens */
@media (max-width: 380px) {
  .logo {
    font-size: var(--fs-sm);
  }

  .header-right {
    gap: 0.75rem;
  }
}

/* ============================================================
   TOUCH — eliminate 300ms tap delay on interactive elements
   ============================================================ */
button,
a,
[role="button"] {
  touch-action: manipulation;
}

/* ============================================================
   REDUCED MOTION — respect user preference
   ============================================================ */
@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;
  }

  /* Immediately show scroll-reveal elements */
  .reveal,
  .reveal-stagger > * {
    opacity: 1 !important;
    transform: none !important;
  }
}