/* =========================================================
   VESELIN MARTINOV PORTFOLIO — style.css
   Aesthetic: Light editorial / clean technical
   ========================================================= */

:root {
  --bg:       #f5f4f0;
  --bg2:      #eceae4;
  --bg3:      #e2e0d8;
  --surface:  #d8d6ce;
  --border:   rgba(0,0,0,0.1);
  --accent:   #1a6b3c;      /* deep forest green */
  --accent2:  #1a4f8b;      /* navy blue */
  --accent3:  #c0392b;      /* dark red */
  --text:     #1a1a1a;
  --muted:    #555;
  --font-display: 'Bebas Neue', sans-serif;
  --font-mono:    'Space Mono', monospace;
  --font-body:    'DM Sans', sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-weight: 300;
  line-height: 1.7;
  overflow-x: hidden;
}

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

/* ── LAYOUT ── */
.container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 2rem;
}

.section { padding: 120px 0; }

/* ── NAV ── */
#nav {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 1.2rem 2rem;
  transition: background 0.3s, backdrop-filter 0.3s;
}
#nav.scrolled {
  background: rgba(245,244,240,0.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 1180px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
}
.nav-logo {
  font-family: var(--font-display);
  font-size: 1.8rem; letter-spacing: 0.05em;
}
.nav-links {
  display: flex; gap: 2.5rem; list-style: none;
  font-size: 0.82rem; letter-spacing: 0.12em; text-transform: uppercase;
}
.nav-links a {
  opacity: 0.6; transition: opacity 0.2s;
  font-family: var(--font-mono);
}
.nav-links a:hover { opacity: 1; }
.nav-links .nav-cta {
  opacity: 1;
  color: var(--accent);
  border: 1px solid var(--accent);
  padding: 0.35rem 1rem;
  transition: background 0.2s, color 0.2s;
}
.nav-links .nav-cta:hover { background: var(--accent); color: #fff; }

.hamburger {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 4px;
}
.hamburger span { display: block; width: 24px; height: 1.5px; background: var(--text); transition: 0.3s; }

.mobile-menu {
  display: none; position: fixed; inset: 0; z-index: 999;
  background: var(--bg);
  align-items: center; justify-content: center;
  flex-direction: column;
}
.mobile-menu.open { display: flex; }
.mobile-menu ul { list-style: none; text-align: center; }
.mobile-menu li { margin: 1.5rem 0; }
.mobile-menu a {
  font-family: var(--font-display);
  font-size: 3rem; color: var(--text);
  transition: color 0.2s;
}
.mobile-menu a:hover { color: var(--accent); }

/* ── ACCENT ── */
.accent { color: var(--accent); }

/* ── SECTION LABEL ── */
.section-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.2rem;
  opacity: 0.85;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 6vw, 5rem);
  line-height: 1.0;
  letter-spacing: 0.01em;
  margin-bottom: 2.5rem;
}

/* ── BUTTONS ── */
.btn-primary {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.85rem 2rem;
  transition: transform 0.15s, box-shadow 0.15s;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(26,107,60,0.25);
}
.btn-ghost {
  display: inline-block;
  border: 1px solid var(--border);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.85rem 2rem;
  transition: border-color 0.2s, color 0.2s;
}
.btn-ghost:hover { border-color: var(--text); }
.btn-outline {
  display: inline-block;
  border-bottom: 1px solid var(--accent);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding-bottom: 0.2rem;
  margin-top: 1.5rem;
  transition: opacity 0.2s;
}
.btn-outline:hover { opacity: 0.7; }
.small { font-size: 0.72rem; padding: 0.6rem 1.2rem; }

/* ── HERO ── */
.hero {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 3rem;
  padding: 8rem 2rem 4rem;
  max-width: 1180px;
  margin: 0 auto;
  position: relative;
}
.hero-grid-overlay {
  position: fixed; inset: 0; z-index: -1;
  background-image:
    linear-gradient(rgba(0,0,0,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,0,0,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}
.hero-content { grid-column: 1; }
.hero-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.5rem;
  display: flex; align-items: center; gap: 0.4rem;
}
.blink { animation: blink 1s step-end infinite; }
@keyframes blink { 50% { opacity: 0; } }

.hero-name {
  font-family: var(--font-display);
  font-size: clamp(5rem, 10vw, 9rem);
  line-height: 0.92;
  letter-spacing: -0.01em;
  margin-bottom: 1.2rem;
  display: flex; flex-direction: column;
}
.hero-role {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text);
  opacity: 0.6;
  margin-bottom: 1.5rem;
}
.hero-stack {
  display: flex; flex-wrap: wrap; gap: 0.5rem;
  margin-bottom: 2rem;
}
.tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border: 1px solid var(--border);
  padding: 0.3rem 0.7rem;
  color: var(--muted);
  transition: border-color 0.2s, color 0.2s;
}
.tag:hover { border-color: var(--accent); color: var(--accent); }
.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; }

/* ── TERMINAL ── */
.hero-terminal {
  grid-column: 2;
  background: #0d1117;
  border: 1px solid rgba(0,0,0,0.15);
  border-radius: 8px;
  overflow: hidden;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  box-shadow: 0 24px 80px rgba(0,0,0,0.15);
}
.terminal-bar {
  background: #1e1e1e;
  padding: 0.7rem 1rem;
  display: flex; align-items: center; gap: 0.5rem;
}
.t-dot { width: 12px; height: 12px; border-radius: 50%; }
.t-dot.red    { background: #ff5f57; }
.t-dot.yellow { background: #febc2e; }
.t-dot.green  { background: #28c840; }
.t-title {
  margin-left: 0.5rem; font-size: 0.7rem;
  color: var(--muted); letter-spacing: 0.05em;
}
.terminal-body {
  padding: 1.2rem 1.4rem;
  min-height: 280px;
  line-height: 1.8;
}
.t-line { display: block; }
.t-prompt { color: var(--accent); }
.t-cmd { color: #e8e8e8; }
.t-out { color: #47c5ff; }
.t-comment { color: #555; }
.t-success { color: #28c840; }
.t-cursor-inline { display: inline-block; width: 8px; height: 1em; background: var(--accent); vertical-align: middle; animation: blink 1s step-end infinite; }

/* ── SCROLL INDICATOR ── */
.hero-scroll {
  position: absolute;
  bottom: 2.5rem; left: 2rem;
  display: flex; flex-direction: column; align-items: center; gap: 0.5rem;
  font-family: var(--font-mono); font-size: 0.6rem;
  letter-spacing: 0.2em; text-transform: uppercase; color: var(--muted);
  grid-column: 1 / -1;
}
.scroll-line {
  width: 1px; height: 50px;
  background: linear-gradient(to bottom, var(--text), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}
@keyframes scrollPulse { 0%,100% { opacity: 0.3; } 50% { opacity: 1; } }

/* ── LINE REVEAL ANIMATION ── */
.line-reveal {
  opacity: 0;
  transform: translateY(20px);
  animation: revealUp 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
  animation-delay: var(--delay, 0s);
}
@keyframes revealUp {
  to { opacity: 1; transform: translateY(0); }
}

/* ── ABOUT ── */
.about { background: var(--bg); }
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: start;
}
.about-text p {
  color: rgba(26,26,26,0.75);
  margin-bottom: 1.2rem;
  font-size: 0.97rem;
}

.skills-block { margin-bottom: 2.5rem; }
.skills-category {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 1.2rem;
}
.skill-bars { display: flex; flex-direction: column; gap: 0.9rem; }
.skill-bar-item {
  display: flex; align-items: center; gap: 1rem;
  font-size: 0.8rem;
}
.skill-bar-item span { min-width: 150px; color: rgba(26,26,26,0.8); }
.bar {
  flex: 1; height: 2px;
  background: var(--border);
}
.bar-fill {
  height: 100%;
  width: var(--w, 0);
  background: var(--accent);
  transform-origin: left;
  transform: scaleX(0);
  transition: transform 1s cubic-bezier(0.25,0.46,0.45,0.94);
}
.bar-fill.animated { transform: scaleX(1); }

.stats-row {
  display: flex; gap: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}
.stat-num {
  font-family: var(--font-display);
  font-size: 2.8rem;
  color: var(--accent);
  line-height: 1;
}
.stat-label {
  font-size: 0.72rem;
  color: var(--muted);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: 0.2rem;
}

/* ── PROJECTS ── */
.projects { background: var(--bg2); }

.project-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border: 1px solid var(--border);
  margin-bottom: 1.5rem;
  transition: border-color 0.3s;
  position: relative;
  overflow: hidden;
}
.project-card:hover { border-color: rgba(255,255,255,0.2); }
.project-card.featured { border-color: rgba(232,255,71,0.2); }
.project-card.featured:hover { border-color: rgba(232,255,71,0.5); }

.project-card-inner {
  padding: 2.5rem;
  display: flex; flex-direction: column; gap: 1rem;
}
.project-meta {
  display: flex; align-items: center; gap: 1rem;
  font-family: var(--font-mono); font-size: 0.7rem;
}
.project-num { color: var(--muted); letter-spacing: 0.1em; }
.project-status {
  letter-spacing: 0.08em; text-transform: uppercase; font-size: 0.65rem;
}
.project-status.live { color: #28c840; }
.project-status.personal { color: var(--accent2); }

.project-name {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 4vw, 3.2rem);
  line-height: 1.0;
}

.project-desc {
  font-size: clamp(0.8rem, 6vw, 1.6rem);
  color: rgba(26,26,26,0.7);
  line-height: 1.6;
}

.project-highlights {
  display: flex; flex-direction: column; gap: 0.4rem;
}
.highlight {
  font-family: var(--font-mono);
  font-size: clamp(0.7rem, 6vw, 1.4rem);
  color: var(--muted);
  padding-left: 1rem;
  position: relative;
}
.highlight::before {
  content: '→';
  position: absolute; left: 0;
  color: var(--accent); font-size: 0.7rem;
}

.project-tech {
  display: flex; flex-wrap: wrap; gap: 0.4rem;
  margin-top: auto;
}
.project-tech span {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.25rem 0.6rem;
  background: var(--surface);
  color: var(--muted);
  border: 1px solid var(--border);
}

.project-links { display: flex; gap: 0.8rem; margin-top: 0.5rem; }

/* Project visual panel */
.project-card-visual {
  background: #1a1a2e;
  border-left: 1px solid rgba(0,0,0,0.1);
  display: flex; align-items: center; justify-content: center;
  padding: 2.5rem;
  position: relative; overflow: hidden;
}
.visual-accent {
  position: absolute;
  width: 200px; height: 200px;
  background: radial-gradient(circle, rgba(26,107,60,0.15) 0%, transparent 70%);
  top: 50%; left: 50%; transform: translate(-50%,-50%);
  pointer-events: none;
}
.visual-accent.accent2 {
  background: radial-gradient(circle, rgba(26,79,139,0.15) 0%, transparent 70%);
}
.visual-accent.accent3 {
  background: radial-gradient(circle, rgba(192,57,43,0.15) 0%, transparent 70%);
}

.code-snippet {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  line-height: 1.9;
  position: relative; z-index: 1;
  width: 100%;
}
.code-snippet pre { white-space: pre-wrap; }
.kw { color: #c792ea; }
.fn { color: #82aaff; }
.str { color: #c3e88d; }
.cm { color: #546e7a; }
.num { color: #f78c6c; }

/* ── SCREENSHOT STACK ── */
.screenshot-stack {
  position: relative;
  width: 100%;
  height: 300px;
}
.screenshot {
  position: absolute;
  border-radius: 4px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.5);
  object-fit: cover;
  object-position: top;
  cursor: pointer;
  transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94),
              box-shadow 0.4s ease,
              opacity 0.4s ease,
              z-index 0s;
}
.screenshot-back {
  width: 78%;
  top: 8%; left: 4%;
  transform: rotate(-2deg);
  opacity: 0.7;
  z-index: 1;
}
.screenshot-front {
  width: 78%;
  top: 6%; right: 4%;
  left: auto;
  transform: rotate(1.5deg);
  opacity: 1;
  z-index: 2;
}

.screenshot.is-focused {
  transform: rotate(0deg) scale(1.9) translateY(-20%) translateX(-25%) !important;
  box-shadow: 0 32px 80px rgba(0,0,0,0.85) !important;
  opacity: 1 !important;
  z-index: 50 !important;
}

/* hover hints */
.screenshot-back:hover  { opacity: 0.9; transform: rotate(-2.5deg) translateY(-4px); z-index: 3; }
.screenshot-front:hover { transform: rotate(0deg) translateY(-4px); }
.screenshot.single:hover { transform: translateY(-4px) scale(1.02); box-shadow: 0 16px 48px rgba(0,0,0,0.7); }

.more-projects-link {
  margin-top: 2rem;
  text-align: right;
}
.more-projects-link a {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.2rem;
  transition: color 0.2s, border-color 0.2s;
}
.more-projects-link a:hover { color: var(--accent); border-color: var(--accent); }

/* ── CERTIFICATIONS MULTI-COLUMN TIMELINE ── */
.certifications { background: var(--bg); }
.certs-header { margin-bottom: 2.5rem; }
.certs-subtitle {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--muted);
  letter-spacing: 0.08em;
  margin-top: -1rem;
}

/* Diploma row */
.cert-diploma-row { margin-bottom: 2.5rem; }
.cert-diploma-card {
  border: 1px solid rgba(232,255,71,0.25);
  background: var(--bg2);
}
.cert-diploma-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 1.2rem 1.5rem; cursor: pointer;
  transition: background 0.2s;
}
.cert-diploma-header:hover { background: var(--bg3); }
.cert-diploma-left { display: flex; flex-direction: column; gap: 0.3rem; }
.cert-diploma-title {
  font-family: var(--font-display);
  font-size: 1.6rem; line-height: 1.1;
}
.cert-diploma-card.is-open .cert-item-body {
  max-height: 320px;
  border: none;
  border-top: 1px solid rgba(232,255,71,0.15);
}
.cert-diploma-card .cert-item-body { background: var(--bg); }
.cert-diploma-card .cert-preview-img--wide {
  height: 200px; width: auto; max-width: 360px;
}

/* Year axis — hidden, columns no longer position by year */
.cert-axis { display: none; }

/* 3-column grid */
.cert-columns {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 1.5px;
  background: var(--border);
  border: 1px solid var(--border);
}

.cert-col {
  background: var(--bg);
  display: flex; flex-direction: column;
}
.cert-col-header {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  padding: 0.9rem 1rem;
  border-bottom: 1px solid var(--border);
  background: var(--bg2);
}

.cert-col-track {
  position: relative;
  padding: 1rem 0.8rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.cert-col-line {
  position: absolute;
  left: 1.6rem;
  top: 0; bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom,
    rgba(26,107,60,0.2),
    rgba(26,107,60,0.05) 90%,
    transparent);
}

/* Each cert node */
.cert-node {
  position: relative;
  top: unset;
  left: unset; right: unset;
  padding-left: 0.8rem;
}

.cert-node-dot {
  position: absolute;
  left: 1.15rem;
  top: 0.75rem;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--bg);
  border: 1.5px solid var(--muted);
  transition: background 0.2s, border-color 0.2s, box-shadow 0.2s;
  z-index: 3;
}
.cert-node.is-open .cert-node-dot,
.cert-node:hover .cert-node-dot {
  background: var(--accent);
  border-color: var(--accent);
  box-shadow: 0 0 8px rgba(26,107,60,0.4);
}

.cert-node-card {
  margin-left: 1.6rem;
  padding: 0.6rem 0.8rem;
  border: 1px solid var(--border);
  background: var(--bg2);
  cursor: pointer;
  display: flex; align-items: center; gap: 0.5rem;
  transition: border-color 0.2s, background 0.2s;
  position: relative;
}
.cert-node-card:hover { border-color: rgba(0,0,0,0.2); background: var(--bg3); }
.cert-node.is-open .cert-node-card { border-color: var(--accent); }

.cert-node-year {
  font-family: var(--font-mono);
  font-size: 0.6rem; color: var(--muted);
  letter-spacing: 0.08em; flex-shrink: 0;
}
.cert-node-name {
  font-size: 0.8rem; font-weight: 500; flex: 1;
  line-height: 1.2;
  color: var(--text);
}

.cert-toggle--sm {
  background: none; border: 1px solid var(--border);
  color: var(--muted);
  width: 20px; height: 20px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; font-size: 0.85rem;
  transition: border-color 0.2s, color 0.2s;
}
.cert-toggle--sm:hover { border-color: var(--accent); color: var(--accent); }
.cert-node.is-open .cert-toggle-icon { transform: rotate(45deg); }

.cert-node-arrow {
  font-size: 0.75rem;
  color: var(--muted);
  transition: color 0.2s, transform 0.2s;
  display: inline-block;
}
.cert-node-card:hover .cert-node-arrow {
  color: var(--accent);
  transform: translate(2px, -2px);
}

/* ── CERT MODAL ── */
.cert-modal {
  display: none;
  position: fixed; inset: 0;
  z-index: 2000;
  align-items: center; justify-content: center;
}
.cert-modal.open { display: flex; }

.cert-modal-backdrop {
  position: absolute; inset: 0;
  background: rgba(26,26,26,0.6);
  backdrop-filter: blur(4px);
}
.cert-modal-box {
  position: relative; z-index: 1;
  background: var(--bg);
  border: 1px solid var(--border);
  box-shadow: 0 24px 80px rgba(0,0,0,0.2);
  max-width: 680px; width: 90%;
  animation: modalIn 0.25s cubic-bezier(0.25,0.46,0.45,0.94);
}
@keyframes modalIn {
  from { opacity: 0; transform: translateY(16px) scale(0.97); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}
.cert-modal-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 1rem 1.2rem;
  border-bottom: 1px solid var(--border);
}
.cert-modal-title {
  font-family: var(--font-mono);
  font-size: 0.75rem; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--text);
}
.cert-modal-close {
  background: none; border: 1px solid var(--border);
  color: var(--muted); width: 28px; height: 28px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; font-size: 0.75rem;
  transition: border-color 0.2s, color 0.2s;
}
.cert-modal-close:hover { border-color: var(--text); color: var(--text); }

.cert-modal-img-link {
  display: block; position: relative; overflow: hidden;
}
.cert-modal-img {
  display: block; width: 100%; height: auto;
  max-height: 70vh; object-fit: contain;
  transition: filter 0.25s;
}
.cert-modal-open {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  background: rgba(26,26,26,0.55);
  font-family: var(--font-mono); font-size: 0.8rem;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: #fff; opacity: 0; transition: opacity 0.2s;
}
.cert-modal-img-link:hover .cert-modal-open { opacity: 1; }

/* shared cert preview (used by diploma and node overlay) */
.cert-item-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
/* node body overrides — uses display toggle instead */
.cert-node-body.cert-item-body {
  max-height: none;
  overflow: visible;
  transition: none;
}
.cert-preview {
  padding: 1rem;
  display: flex; gap: 1rem; align-items: flex-start;
}
.cert-preview-link {
  position: relative; display: block;
  flex-shrink: 0; overflow: hidden;
  border: 1px solid var(--border);
}
.cert-preview-img {
  display: block;
  height: 130px; width: auto; max-width: 240px;
  object-fit: cover; object-position: top;
  transition: transform 0.3s, filter 0.3s;
  filter: brightness(0.9);
}
.cert-preview-link:hover .cert-preview-img { transform: scale(1.03); filter: brightness(1); }
.cert-preview-overlay {
  position: absolute; inset: 0;
  background: rgba(10,10,10,0.6);
  display: flex; align-items: center; justify-content: center;
  opacity: 0; transition: opacity 0.25s;
  font-family: var(--font-mono); font-size: 0.68rem;
  letter-spacing: 0.1em; color: var(--accent); text-transform: uppercase;
}
.cert-preview-link:hover .cert-preview-overlay { opacity: 1; }

.cert-item-tag {
  font-family: var(--font-mono);
  font-size: 0.65rem; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--accent); border: 1px solid rgba(26,107,60,0.35);
  padding: 0.15rem 0.5rem; display: inline-block;
}
.cert-item-issuer {
  font-family: var(--font-mono); font-size: 0.65rem;
  color: var(--muted); letter-spacing: 0.06em;
}

.cert-toggle {
  background: none; border: 1px solid var(--border);
  color: var(--muted); width: 26px; height: 26px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; flex-shrink: 0;
  transition: border-color 0.2s, color 0.2s;
}
.cert-toggle:hover { border-color: var(--accent); color: var(--accent); }
.cert-toggle-icon { font-size: 1rem; line-height: 1; transition: transform 0.3s; display: block; }
.cert-diploma-card.is-open .cert-toggle-icon { transform: rotate(45deg); }

/* responsive collapse */
@media (max-width: 900px) {
  .cert-columns { grid-template-columns: 1fr; }
  .cert-col-track { min-height: auto; }
  .cert-node { position: relative; top: auto; left: auto; margin-bottom: 0.4rem; }
  .cert-col-line { display: none; }
  .cert-axis { display: none; }
}

/* ── CONTACT ── */
.contact { background: var(--bg2); }
.contact-inner { max-width: 700px; }
.contact-title { margin-bottom: 1rem; }
.contact-sub {
  color: rgba(26,26,26,0.65);
  font-size: 0.97rem;
  margin-bottom: 2.5rem;
  max-width: 500px;
}
.contact-links { display: flex; flex-direction: column; gap: 0; }
.contact-link {
  display: flex; align-items: center; gap: 1.2rem;
  padding: 1.2rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.92rem;
  transition: color 0.2s;
  position: relative;
}
.contact-link:first-child { border-top: 1px solid var(--border); }
.contact-link:hover { color: var(--accent); }
.contact-icon {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  width: 28px; text-align: center;
  color: var(--muted);
}
.arrow {
  margin-left: auto;
  font-size: 0.9rem;
  opacity: 0;
  transition: opacity 0.2s, transform 0.2s;
  transform: translateX(-6px);
}
.contact-link:hover .arrow { opacity: 1; transform: translateX(0); }

/* ── FOOTER ── */
footer {
  padding: 2rem 0;
  border-top: 1px solid var(--border);
}
.footer-inner {
  display: flex; align-items: center; justify-content: space-between;
}
.footer-copy, .footer-made {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  color: var(--muted);
  text-transform: uppercase;
}

/* ── SCROLL FADE IN ── */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── RESPONSIVE ── */
@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    padding-top: 7rem;
  }
  .hero-terminal { grid-column: 1; }
  .about-grid { grid-template-columns: 1fr; gap: 3rem; }
  .project-card { grid-template-columns: 1fr; }
  .project-card-visual { border-left: none; border-top: 1px solid var(--border); min-height: 220px; }
  .cert-card.featured-cert { grid-column: span 1; }
  .nav-links { display: none; }
  .hamburger { display: flex; }
  .screenshot.is-focused {
    transform: rotate(0deg) scale(1.9) translateY(-20%) !important;
    box-shadow: 0 32px 80px rgba(0,0,0,0.85) !important;
    opacity: 1 !important;
    z-index: 50 !important;
  }
}

@media (max-width: 600px) {
  .section { padding: 80px 0; }
  .hero-name { font-size: 4.5rem; }
  .stats-row { flex-wrap: wrap; gap: 1.5rem; }
  .footer-inner { flex-direction: column; gap: 0.7rem; text-align: center; }
}