/* ==========================================================================
   TOKENS
   ========================================================================== */
:root {
  color-scheme: light;

  --paper: #E8DDC8;
  --page-overlay: rgba(232, 221, 200, 0.72);
  --surface: #E8DDC8;
  --surface-alt: #F1F2F5;
  --ink: #14161C;
  --ink-muted: #545A6C;
  --line: #E4E6EB;
  --line-strong: #D3D6DD;

  --accent: #3B4FE0;
  --accent-strong: #2E3FC0;
  --accent-soft: #EEF0FD;
  --on-accent: #FFFFFF;

  --accent-warm: #8B5E17;
  --accent-warm-soft: #FBF0DD;
  --success: #166534;
  --success-soft: #DCFCE7;

  --shadow-sm: 0 1px 2px rgba(20, 22, 28, 0.06);
  --shadow-md: 0 10px 30px rgba(20, 22, 28, 0.10);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-full: 999px;

  --font-sans: 'Manrope', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --container: 1180px;
  --gutter: clamp(1.25rem, 4vw, 2.5rem);

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --dur-fast: 150ms;
  --dur-base: 320ms;
}

[data-theme="dark"] {
  color-scheme: dark;

  --paper: #0E1016;
  --page-overlay: rgba(14, 16, 22, 0.76);
  --surface: #161922;
  --surface-alt: #1D212B;
  --ink: #F1F2F6;
  --ink-muted: #9BA2B4;
  --line: #272C37;
  --line-strong: #333949;

  --accent: #8792F5;
  --accent-strong: #A9B2FF;
  --accent-soft: rgba(135, 146, 245, 0.16);
  --on-accent: #12142B;

  --accent-warm: #E3AA55;
  --accent-warm-soft: rgba(227, 170, 85, 0.16);
  --success: #86EFAC;
  --success-soft: rgba(34, 197, 94, 0.16);

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.30);
  --shadow-md: 0 14px 32px rgba(0, 0, 0, 0.40);
}

/* ==========================================================================
   RESET
   ========================================================================== */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body, h1, h2, h3, p, dl, dd, figure { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: none; padding: 0; cursor: pointer; }

body {
  background-color: var(--paper);
  background-image: linear-gradient(var(--page-overlay), var(--page-overlay)), url("https://res.cloudinary.com/crvidoqc/image/upload/v1793847368/cletzsam-fedev_ca7ds9.jpg");
  background-position: center;
  background-size: cover;
  background-attachment: fixed;
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  overflow-wrap: break-word;
  transition: background-color var(--dur-base) var(--ease), color var(--dur-base) var(--ease);
}

::selection { background: var(--accent-soft); color: var(--ink); }

/* ==========================================================================
   ACCESSIBILITY UTILITIES
   ========================================================================== */
.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  background: var(--accent);
  color: var(--on-accent);
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-sm);
  z-index: 1000;
  font-weight: 600;
  transition: top var(--dur-fast) var(--ease);
}
.skip-link:focus { top: 1rem; }

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

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

.section {
  padding-block: clamp(3.5rem, 5vw + 1.5rem, 6.5rem);
  border-top: 1px solid var(--line);
}
.section-tight { padding-block: clamp(2rem, 3vw + 1rem, 3.5rem); }

.section-header { max-width: 640px; margin-bottom: clamp(2rem, 4vw, 3rem); }

.section-title {
  font-size: clamp(1.75rem, 1.4rem + 1.6vw, 2.5rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.01em;
}
.section-title-sm { font-size: clamp(1.25rem, 1.1rem + 0.6vw, 1.5rem); }

.section-subtitle {
  margin-top: 0.6rem;
  color: var(--ink-muted);
  font-size: 1.0625rem;
}

/* ==========================================================================
   TYPOGRAPHY
   ========================================================================== */
h1, h2, h3 { font-family: var(--font-sans); color: var(--ink); }
p { color: var(--ink); max-width: 62ch; }

/* ==========================================================================
   BUTTONS
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.5rem;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 0.9375rem;
  line-height: 1;
  border: 1px solid transparent;
  min-height: 48px;
  transition: transform var(--dur-fast) var(--ease), background-color var(--dur-fast) var(--ease),
    border-color var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn-primary { background: var(--accent); color: var(--on-accent); }
.btn-primary:hover { background: var(--accent-strong); box-shadow: var(--shadow-md); }

.btn-outline { background: transparent; color: var(--ink); border-color: var(--line-strong); }
.btn-outline:hover { border-color: var(--accent); color: var(--accent); }

.btn-ghost { background: var(--surface-alt); color: var(--ink); }
.btn-ghost:hover { background: var(--line); }

.btn-small { padding: 0.6rem 1.15rem; font-size: 0.875rem; min-height: 40px; }
.btn-large { padding: 1rem 2rem; font-size: 1rem; min-height: 52px; }

/* ==========================================================================
   HEADER / NAV
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--paper);
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur-base) var(--ease), background-color var(--dur-base) var(--ease);
}
.site-header.is-scrolled { border-bottom-color: var(--line); box-shadow: var(--shadow-sm); }

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 72px;
  position: relative;
}

.brand {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 1.0625rem;
  color: var(--ink);
  letter-spacing: -0.02em;
  white-space: nowrap;
}
.brand-footer { font-size: 1rem; }

.nav-links {
  position: fixed;
  top: 72px;
  right: 0;
  left: auto;
  z-index: 101;
  width: min(85vw, 360px);
  max-height: calc(100vh - 72px);
  max-height: calc(100dvh - 72px);
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-right: none;
  border-radius: var(--radius-md) 0 0 var(--radius-md);
  padding: 1.25rem var(--gutter);
  box-shadow: var(--shadow-md);
  overflow-y: auto;
  opacity: 0;
  visibility: hidden;
  transform: translateX(100%);
  pointer-events: none;
  transition: opacity 500ms var(--ease), transform 500ms var(--ease), visibility 500ms;
}
.nav-links.is-open { opacity: 1; visibility: visible; transform: translateX(0); pointer-events: auto; }

.nav-link {
  display: block;
  padding: 0.7rem 0.25rem;
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--ink-muted);
  border-bottom: 1px solid var(--line);
  transition: color var(--dur-fast) var(--ease);
}
.nav-links li:nth-last-child(2) .nav-link { border-bottom: none; }
.nav-link:hover, .nav-link.is-active { color: var(--accent); }

.nav-cta-mobile { margin-top: 0.75rem; }
.nav-cta-mobile .btn { width: 100%; }
.nav-cta { display: none; }

.nav-actions { display: flex; align-items: center; gap: 0.6rem; }

.theme-toggle {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-full);
  background: var(--surface);
  border: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ink);
  flex-shrink: 0;
  transition: border-color var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}
.theme-toggle:hover { border-color: var(--accent); color: var(--accent); }

.icon-sun, .icon-moon { display: flex; align-items: center; justify-content: center; }
[data-theme="light"] .icon-sun { display: none; }
[data-theme="dark"] .icon-moon { display: none; }

.icon-moon { position: relative; width: 14px; height: 14px; border-radius: 50%; background: currentColor; }
.icon-moon::after {
  content: "";
  position: absolute;
  top: -3px;
  right: -5px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--surface);
}

.menu-toggle {
  width: 42px;
  height: 42px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  border-radius: var(--radius-full);
  flex-shrink: 0;
}
.menu-toggle-bar {
  width: 20px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform var(--dur-base) var(--ease), opacity var(--dur-fast) linear;
}
.menu-toggle.is-open .menu-toggle-bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle.is-open .menu-toggle-bar:nth-child(2) { opacity: 0; }
.menu-toggle.is-open .menu-toggle-bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ==========================================================================
   HERO
   ========================================================================== */
.hero { padding-block: clamp(3rem, 6vw + 1rem, 6rem) clamp(3.5rem, 6vw, 6rem); }

.hero-inner { display: flex; flex-direction: column; gap: clamp(2.5rem, 5vw, 3.5rem); }

.hero-content[data-reveal-immediate], .hero-visual[data-reveal-immediate] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 700ms var(--ease), transform 700ms var(--ease);
}
.hero-content.is-visible, .hero-visual.is-visible { opacity: 1; transform: translateY(0); }
.hero-visual.is-visible { transition-delay: 120ms; }

.hero-title {
  font-size: clamp(2.25rem, 1.6rem + 3vw, 3.75rem);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.02em;
  max-width: 14ch;
}

.hero-lead {
  margin-top: 1.25rem;
  font-size: clamp(1.0625rem, 1rem + 0.4vw, 1.25rem);
  color: var(--ink-muted);
  max-width: 46ch;
  line-height: 1.65;
}

.hero-actions { display: flex; flex-wrap: wrap; gap: 0.85rem; margin-top: 2rem; }

.social-row { display: flex; align-items: center; gap: 0.6rem; margin-top: 2.25rem; }

.social-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  width: 42px;
  height: 42px;
  border-radius: var(--radius-full);
  background: var(--surface);
  border: 1px solid var(--line);
  color: var(--ink);
  justify-content: center;
  transition: border-color var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease);
}
a.social-link:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }
.social-link.is-soon { color: var(--ink-muted); cursor: default; }

.social-glyph-text { font-family: var(--font-mono); font-weight: 700; font-size: 0.9rem; }

.soon-badge {
  position: absolute;
  bottom: -8px;
  right: -6px;
  background: var(--accent-warm-soft);
  color: var(--accent-warm);
  font-size: 0.625rem;
  font-weight: 700;
  padding: 0.1rem 0.4rem;
  border-radius: var(--radius-full);
  white-space: nowrap;
}
.social-label { display: none; }

.hero-visual { width: 100%; }

.code-window {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  max-width: 480px;
  margin-inline: auto;
}

.code-window-bar {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.85rem 1rem;
  background: var(--surface-alt);
  border-bottom: 1px solid var(--line);
}
.code-dot { width: 9px; height: 9px; border-radius: 50%; background: var(--line-strong); }
.code-tab { margin-left: 0.6rem; font-family: var(--font-mono); font-size: 0.75rem; color: var(--ink-muted); }

.code-window-body {
  margin: 0;
  padding: 1.25rem 1.35rem;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: clamp(0.75rem, 0.68rem + 0.3vw, 0.85rem);
  line-height: 1.7;
}
.code-window-body code { white-space: pre; }

.tok-com { color: var(--ink-muted); }
.tok-kw { color: var(--accent); }
.tok-var { color: var(--ink); }
.tok-prop { color: var(--ink); }
.tok-str { color: var(--accent-warm); }

.code-window-prompt { padding: 0 1.35rem 1.1rem; font-family: var(--font-mono); font-size: 0.85rem; color: var(--ink-muted); }
.prompt-cursor {
  display: inline-block;
  width: 7px;
  height: 1em;
  margin-left: 4px;
  vertical-align: -2px;
  background: var(--accent);
  animation: caret-blink 1.1s steps(1) infinite;
}
@keyframes caret-blink { 0%, 49% { opacity: 1; } 50%, 100% { opacity: 0; } }
@media (prefers-reduced-motion: reduce) { .prompt-cursor { animation: none; opacity: 1; } }

/* ==========================================================================
   ABOUT
   ========================================================================== */
.about-inner { display: grid; gap: 2.5rem; }

.about-media { display: flex; flex-direction: column; align-items: flex-start; gap: 1.75rem; }

.avatar-frame {
  width: 116px;
  height: 116px;
  border-radius: var(--radius-lg);
  background: var(--accent-soft);
  border: 1px dashed var(--line-strong);
  display: flex;
  align-items: center;
  justify-content: center;
}
.avatar-initials { font-family: var(--font-mono); font-size: 1.75rem; font-weight: 600; color: var(--accent); }
.avatar-photo { width: 116px; height: 116px; border-radius: var(--radius-lg); object-fit: cover; }

.quick-facts { display: flex; flex-direction: column; gap: 0.85rem; width: 100%; max-width: 260px; }
.quick-fact { display: flex; justify-content: space-between; gap: 1rem; padding-bottom: 0.75rem; border-bottom: 1px solid var(--line); }
.quick-fact dt { color: var(--ink-muted); font-size: 0.875rem; }
.quick-fact dd { margin: 0; font-weight: 600; font-size: 0.875rem; text-align: right; }
.quick-fact-achievements { flex-direction: column; gap: 0.5rem; }
.quick-fact-achievements dd { text-align: left; }
.quick-fact-achievements ul { display: grid; gap: 0.45rem; }
.quick-fact-achievements li { font-size: 0.8125rem; line-height: 1.5; }

.about-content p { margin-top: 1.15rem; }
.about-content p:first-of-type { margin-top: 1.5rem; }

/* ==========================================================================
   SKILLS
   ========================================================================== */
.skills-grid { display: grid; gap: 1.5rem; }

.skill-group { padding: 1.75rem; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--surface); }

.skill-group-title { display: flex; align-items: center; gap: 0.6rem; font-size: 1.0625rem; font-weight: 700; }
.skill-group-icon { font-family: var(--font-mono); color: var(--accent); font-size: 0.95rem; }

.skill-chips { display: flex; flex-wrap: wrap; gap: 0.6rem; margin-top: 1.25rem; }

.skill-chip { padding: 0.5rem 1rem; border-radius: var(--radius-full); background: var(--surface-alt); border: 1px solid var(--line); font-size: 0.875rem; font-weight: 500; }

.skill-chip-learning { display: inline-flex; align-items: center; gap: 0.5rem; border-style: dashed; border-color: var(--accent-warm); background: var(--accent-warm-soft); }

.learning-badge { font-size: 0.6875rem; font-weight: 700; color: var(--accent-warm); background: var(--surface); padding: 0.15rem 0.45rem; border-radius: var(--radius-full); }

/* ==========================================================================
   PROJECTS
   ========================================================================== */
.projects-grid { display: grid; gap: 1.5rem; }

.project-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 1.75rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface);
  transition: transform var(--dur-base) var(--ease), box-shadow var(--dur-base) var(--ease), border-color var(--dur-base) var(--ease);
}
.project-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--line-strong); }

.project-title { font-size: 1.125rem; font-weight: 700; }
.project-desc { margin-top: 0.75rem; color: var(--ink-muted); font-size: 0.9375rem; }

.tech-tags { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 1.1rem; }
.tech-tags li { font-size: 0.75rem; font-weight: 600; color: var(--ink-muted); background: var(--surface-alt); padding: 0.3rem 0.65rem; border-radius: var(--radius-full); }

.project-links { display: flex; flex-wrap: wrap; gap: 0.65rem; }

.project-card-placeholder { grid-column: 1 / -1; align-items: center; justify-content: center; text-align: center; }

/* ==========================================================================
   JOURNEY
   ========================================================================== */
.timeline { position: relative; display: flex; flex-direction: column; gap: 2.25rem; }
.timeline::before { content: ""; position: absolute; left: 13px; top: 6px; bottom: 6px; width: 2px; background: var(--line); }

.timeline-step { position: relative; padding-left: 2.75rem; }
.timeline-marker {
  position: absolute;
  left: 0;
  top: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--surface);
  border: 2px solid var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent);
}
.timeline-title { font-size: 1.0625rem; font-weight: 700; padding-top: 0.1rem; }
.timeline-text { margin-top: 0.4rem; color: var(--ink-muted); font-size: 0.9375rem; }

/* ==========================================================================
   CERTIFICATION
   ========================================================================== */
.certification-panel {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  padding: 1.75rem clamp(1.5rem, 3vw, 2.5rem);
  border: 1px solid var(--line);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius-md);
  background: var(--surface);
}
.certification-info { flex: 1; }
.certification-name { margin-top: 0.5rem; font-weight: 700; font-size: 1.0625rem; }
.certification-issuer { margin-top: 0.2rem; color: var(--ink-muted); font-size: 0.9375rem; }

.certification-status { display: flex; flex-direction: column; gap: 0.4rem; }
.status-badge {
  display: inline-flex;
  align-self: flex-start;
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius-full);
  background: var(--accent-warm-soft);
  color: var(--accent-warm);
  font-size: 0.8125rem;
  font-weight: 700;
}
.status-badge-earned { background: var(--success-soft); color: var(--success); }
.certification-note { color: var(--ink-muted); font-size: 0.8125rem; }

/* ==========================================================================
   INTERESTS
   ========================================================================== */
.interests-grid { display: grid; gap: 2rem; }
.interest-item { max-width: 40ch; }

.interest-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--accent-soft);
  color: var(--accent);
  margin-bottom: 1rem;
}
.interest-title { font-size: 1rem; font-weight: 700; }
.interest-text { margin-top: 0.5rem; color: var(--ink-muted); font-size: 0.9375rem; }

.interests-footnote {
  margin-top: 2.75rem;
  padding-top: 2rem;
  border-top: 1px solid var(--line);
  color: var(--ink-muted);
  font-size: 0.9375rem;
  max-width: 60ch;
}

/* ==========================================================================
   CONTACT
   ========================================================================== */
.section-contact { border-bottom: 1px solid var(--line); }

.contact-inner { max-width: 560px; margin-inline: auto; text-align: center; display: flex; flex-direction: column; align-items: center; }
.contact-lead { margin-top: 1rem; color: var(--ink-muted); font-size: 1.0625rem; max-width: 44ch; }
.contact-email-plain { margin-top: 0.9rem; color: var(--ink-muted); font-size: 0.9375rem; }

.social-row-contact { margin-top: 2.5rem; justify-content: center; flex-wrap: wrap; }
.social-row-contact .social-link { width: auto; height: auto; padding: 0.6rem 1.1rem; border-radius: var(--radius-full); gap: 0.5rem; }
.social-row-contact .social-label { display: inline; font-size: 0.875rem; font-weight: 600; }
.social-row-contact .soon-badge { position: static; margin-left: 0.15rem; }

/* ==========================================================================
   FOOTER
   ========================================================================== */
.site-footer { padding-block: 2.5rem; }
.footer-inner { display: flex; flex-direction: column; align-items: center; gap: 0.75rem; text-align: center; }
.footer-text { color: var(--ink-muted); font-size: 0.875rem; }

/* ==========================================================================
   SCROLL REVEAL
   ========================================================================== */
[data-reveal] { opacity: 0; transform: translateY(18px); transition: opacity 600ms var(--ease), transform 600ms var(--ease); }
[data-reveal].is-visible { opacity: 1; transform: translateY(0); }

.skills-grid [data-reveal]:nth-child(2) { transition-delay: 90ms; }
.projects-grid [data-reveal]:nth-child(2) { transition-delay: 90ms; }
.projects-grid [data-reveal]:nth-child(3) { transition-delay: 180ms; }
.timeline [data-reveal]:nth-child(2) { transition-delay: 80ms; }
.timeline [data-reveal]:nth-child(3) { transition-delay: 160ms; }
.timeline [data-reveal]:nth-child(4) { transition-delay: 240ms; }
.interests-grid [data-reveal]:nth-child(2) { transition-delay: 70ms; }
.interests-grid [data-reveal]:nth-child(3) { transition-delay: 140ms; }
.interests-grid [data-reveal]:nth-child(4) { transition-delay: 210ms; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}


/* ==========================================================================
   RESPONSIVE
   ========================================================================== */
@media (max-width: 767px) {
  body {
    background-image: linear-gradient(var(--page-overlay), var(--page-overlay)), url("cletzsam-fedev-mobile.jpeg");
  }
}

@media (min-width: 768px) and (max-width: 1023px) {
  body {
    background-image: linear-gradient(var(--page-overlay), var(--page-overlay)), url("cletzsam-fedev-tablet.jpeg");
  }
}

@media (min-width: 640px) {
  .skills-grid { grid-template-columns: 1fr 1fr; }
  .projects-grid { grid-template-columns: 1fr 1fr; }
  .interests-grid { grid-template-columns: 1fr 1fr; }
  .certification-panel { flex-direction: row; align-items: center; justify-content: space-between; }
  .certification-status { align-items: flex-end; text-align: right; }
}

@media (min-width: 768px) {
  .about-inner { grid-template-columns: 260px 1fr; gap: clamp(2.5rem, 5vw, 4.5rem); align-items: start; }
  .about-media { position: sticky; top: 6.5rem; }
}

@media (min-width: 1024px) {
  .nav { flex: 1; display: flex; justify-content: center; }
  .nav-links {
    position: static;
    top: auto;
    right: auto;
    left: auto;
    z-index: auto;
    width: auto;
    height: auto;
    flex-direction: row;
    align-items: center;
    gap: clamp(1rem, 1vw + 0.5rem, 1.6rem);
    background: transparent;
    border: none;
    box-shadow: none;
    padding: 0;
    opacity: 1;
    visibility: visible;
    transform: none;
    pointer-events: auto;
    border-radius: 0;
    overflow: visible;
  }
  .nav-link { padding: 0.4rem 0.1rem; border-bottom: none; font-size: 0.9rem; }
  .nav-cta-mobile { display: none; }
  .nav-cta { display: inline-flex; }
  .menu-toggle { display: none; }

  .hero-inner { flex-direction: row; align-items: center; }
  .hero-content { flex: 1 1 55%; max-width: 560px; }
  .hero-visual { flex: 1 1 45%; display: flex; justify-content: center; }

  .timeline { flex-direction: row; gap: 1.5rem; }
  .timeline::before { left: 0; right: 0; top: 13px; bottom: auto; height: 2px; width: auto; }
  .timeline-step { flex: 1; padding-left: 0; padding-top: 3rem; }
  .timeline-marker { left: 0; top: 0; }
}

@media (min-width: 1200px) {
  .nav-links { gap: 1.85rem; }
}

@media (min-width: 1280px) {
  .interests-grid { grid-template-columns: repeat(4, 1fr); }
  .interest-item { max-width: none; }
}