/* ============================================================
   Erkan Osmanoglu — Portfolio
   Aesthetic: dark "engineering atelier" · serif display + acid lime
   ============================================================ */

:root {
  --bg:        #0b0b0d;
  --bg-elev:   #111114;
  --bg-card:   #131316;
  --ink:       #ededeb;
  --ink-soft:  #b7b7b1;
  --muted:     #7d7d77;
  --line:      #232327;
  --line-soft: #1a1a1e;
  --accent:    #c8fb3c;   /* acid lime */
  --accent-2:  #6ff0c9;   /* mint */
  --accent-ink:#0b0b0d;
  --danger:    #ff6b5e;

  --font-display: "Fraunces", Georgia, serif;
  --font-body:    "Bricolage Grotesque", system-ui, sans-serif;
  --font-mono:    "JetBrains Mono", ui-monospace, monospace;

  --maxw: 1180px;
  --ease: cubic-bezier(.22,.61,.36,1);
  --radius: 18px;
}

/* ---------- light theme ---------- */
:root[data-theme="light"] {
  --bg:        #f3f2ec;
  --bg-elev:   #eae8dd;
  --bg-card:   #fbfaf5;
  --ink:       #15150f;
  --ink-soft:  #43433b;
  --muted:     #76766a;
  --line:      #dcdacb;
  --line-soft: #e7e5d8;
  --accent:    #5f7d00;   /* deep olive-lime (readable as text) */
  --accent-2:  #1f9e7a;
  --accent-ink:#fbfaf5;
}

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

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
  font-weight: 400;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
::selection { background: var(--accent); color: var(--accent-ink); }

/* ---------- atmosphere ---------- */
.grain {
  position: fixed; inset: 0; z-index: 1; pointer-events: none;
  opacity: .045; mix-blend-mode: screen;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
.bg-glow {
  position: fixed; z-index: 0; pointer-events: none;
  top: -25vh; left: 50%; transform: translateX(-50%);
  width: 90vw; height: 70vh;
  background: radial-gradient(50% 50% at 50% 50%, rgba(200,251,60,.10), transparent 70%);
  filter: blur(40px);
}
:root[data-theme="light"] .bg-glow {
  background: radial-gradient(50% 50% at 50% 50%, rgba(95,125,0,.08), transparent 70%);
}
:root[data-theme="light"] .grain { mix-blend-mode: multiply; opacity: .03; }

/* base grid texture */
body::before {
  content: ""; position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background-image:
    linear-gradient(var(--line-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(circle at 50% 30%, #000 0%, transparent 75%);
          mask-image: radial-gradient(circle at 50% 30%, #000 0%, transparent 75%);
  opacity: .5;
}

main, .nav, .footer { position: relative; z-index: 2; }

/* ---------- scroll progress ---------- */
.scroll-progress {
  position: fixed; top: 0; left: 0; height: 2px; width: 0;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  z-index: 100; transition: width .1s linear;
}

/* ============================================================
   NAV
   ============================================================ */
.nav {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px clamp(20px, 5vw, 56px);
  backdrop-filter: blur(12px);
  background: rgba(11,11,13,.55);
  border-bottom: 1px solid transparent;
  transition: border-color .3s, background .3s, padding .3s;
}
.nav.scrolled {
  border-bottom-color: var(--line);
  background: rgba(11,11,13,.82);
  padding-top: 12px; padding-bottom: 12px;
}

:root[data-theme="light"] .nav { background: rgba(243,242,236,.7); }
:root[data-theme="light"] .nav.scrolled { background: rgba(243,242,236,.9); }
:root[data-theme="light"] .nav-links a { color: var(--ink-soft); }
:root[data-theme="light"] .nav-links.open { background: var(--bg-elev); }

.nav-right { display: flex; align-items: center; gap: clamp(14px, 2.5vw, 26px); }

.nav-controls { display: flex; align-items: center; gap: 10px; }

.lang-switch {
  display: inline-flex; border: 1px solid var(--line); border-radius: 100px;
  overflow: hidden; font-family: var(--font-mono); font-size: .76rem; font-weight: 500;
}
.lang-switch button {
  background: none; border: 0; color: var(--muted); cursor: pointer;
  padding: 6px 11px; transition: color .25s, background .25s; letter-spacing: .02em;
}
.lang-switch button:hover { color: var(--ink); }
.lang-switch button.active { background: var(--accent); color: var(--accent-ink); }

.theme-toggle {
  width: 38px; height: 38px; border-radius: 50%; border: 1px solid var(--line);
  background: var(--bg-card); color: var(--ink); cursor: pointer;
  display: grid; place-items: center; transition: border-color .3s, transform .4s var(--ease), background .3s;
}
.theme-toggle:hover { border-color: var(--ink-soft); transform: rotate(18deg); }
.theme-toggle .icon-sun { display: none; }
:root[data-theme="light"] .theme-toggle .icon-sun { display: block; }
:root[data-theme="light"] .theme-toggle .icon-moon { display: none; }

.brand { display: flex; align-items: center; gap: 7px; }
.brand-mark {
  font-family: var(--font-mono); font-weight: 700; font-size: 1.15rem;
  letter-spacing: -.02em;
}
.brand-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent); box-shadow: 0 0 12px var(--accent);
  animation: pulse 2.4s infinite;
}

.nav-links { display: flex; align-items: center; gap: clamp(14px, 2.4vw, 34px); }
.nav-links a {
  font-size: .92rem; color: var(--ink-soft); position: relative;
  transition: color .25s; padding: 4px 0;
}
.nav-links a::after {
  content: ""; position: absolute; left: 0; bottom: -2px; height: 1px; width: 0;
  background: var(--accent); transition: width .3s var(--ease);
}
.nav-links a:hover { color: var(--ink); }
.nav-links a:hover::after,
.nav-links a.active::after { width: 100%; }
.nav-links a.active { color: var(--ink); }

.nav-cta {
  border: 1px solid var(--line); border-radius: 100px;
  padding: 8px 18px !important; color: var(--ink) !important;
}
.nav-cta::after { display: none; }
.nav-cta:hover { background: var(--accent); color: var(--accent-ink) !important; border-color: var(--accent); }

.nav-toggle {
  display: none; flex-direction: column; gap: 5px; background: none;
  border: 0; cursor: pointer; padding: 8px;
}
.nav-toggle span {
  width: 24px; height: 2px; background: var(--ink); border-radius: 2px;
  transition: transform .3s var(--ease), opacity .3s;
}
.nav-toggle[aria-expanded="true"] span:first-child { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:last-child { transform: translateY(-7px) rotate(-45deg); }

/* ============================================================
   HERO
   ============================================================ */
.hero {
  min-height: 100vh; position: relative;
  display: flex; flex-direction: column; justify-content: center;
  max-width: var(--maxw); margin: 0 auto;
  padding: clamp(40px, 8vh, 90px) clamp(20px, 5vw, 56px) clamp(90px, 14vh, 130px);
}
.hero-inner { max-width: 880px; }

.eyebrow {
  font-family: var(--font-mono); font-size: .8rem; letter-spacing: .12em;
  text-transform: uppercase; color: var(--accent); margin-bottom: 26px;
}

.hero-title {
  font-family: var(--font-display);
  font-weight: 600; line-height: .9; letter-spacing: -.03em;
  font-size: clamp(3.4rem, 13vw, 9.5rem);
  font-optical-sizing: auto;
}
.hero-title span { display: block; }
.hero-em {
  font-style: italic; font-weight: 300;
  background: linear-gradient(100deg, var(--ink) 30%, var(--accent));
  -webkit-background-clip: text; background-clip: text; color: transparent;
  /* gradient-clip kutusunu büyüt: aksanlar/alt kıvrımlar (ğ, ş, ç) kırpılmasın */
  padding: .12em 0 .18em; margin: -.12em 0 -.18em;
}

.hero-role {
  font-family: var(--font-mono); font-size: clamp(1rem, 2.6vw, 1.5rem);
  color: var(--ink-soft); margin-top: 28px; min-height: 1.6em; font-weight: 500;
}
.caret { color: var(--accent); animation: blink 1s steps(1) infinite; margin-left: 2px; }

.hero-lead {
  font-size: clamp(1.02rem, 1.6vw, 1.22rem); color: var(--ink-soft);
  max-width: 620px; margin-top: 22px; line-height: 1.7;
}
.hero-lead strong { color: var(--ink); font-weight: 600; }

.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 38px; }

.hero-status {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-mono); font-size: .82rem; color: var(--muted);
  margin-top: 30px;
}
.pulse {
  width: 8px; height: 8px; border-radius: 50%; background: var(--accent-2);
  box-shadow: 0 0 0 0 rgba(111,240,201,.6); animation: ring 2s infinite;
}

/* stats */
.hero-stats {
  display: flex; flex-wrap: wrap; gap: clamp(28px, 6vw, 72px);
  margin-top: clamp(48px, 8vh, 80px);
  padding-top: 34px; border-top: 1px solid var(--line);
}
.stat { display: flex; align-items: baseline; flex-wrap: wrap; gap: 2px 6px; }
.stat-num {
  font-family: var(--font-display); font-size: clamp(2.2rem, 5vw, 3.2rem);
  font-weight: 600; letter-spacing: -.02em; line-height: 1;
}
.stat-plus { font-family: var(--font-display); font-size: 1.6rem; color: var(--accent); }
.stat-label {
  flex-basis: 100%; font-family: var(--font-mono); font-size: .74rem;
  text-transform: uppercase; letter-spacing: .08em; color: var(--muted); margin-top: 6px;
}

.scroll-hint {
  position: absolute; bottom: 26px; left: 50%; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 10px;
  font-family: var(--font-mono); font-size: .68rem; letter-spacing: .15em;
  text-transform: uppercase; color: var(--muted);
}
.scroll-line { width: 1px; height: 40px; background: linear-gradient(var(--accent), transparent); animation: drop 2s infinite; }

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-mono); font-size: .9rem; font-weight: 500;
  padding: 13px 24px; border-radius: 100px; cursor: pointer;
  border: 1px solid var(--line); transition: all .3s var(--ease);
  position: relative; overflow: hidden;
}
.btn-arrow { transition: transform .3s var(--ease); }
.btn:hover .btn-arrow { transform: translateX(4px); }

.btn-primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.btn-primary:hover { box-shadow: 0 8px 30px -6px rgba(200,251,60,.5); transform: translateY(-2px); }

.btn-ghost { background: transparent; color: var(--ink); }
.btn-ghost:hover { border-color: var(--ink-soft); background: var(--bg-elev); transform: translateY(-2px); }

.btn-block { width: 100%; justify-content: center; margin-top: 8px; }

/* ============================================================
   MARQUEE
   ============================================================ */
.marquee {
  border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
  overflow: hidden; padding: 18px 0; background: var(--bg-elev);
}
.marquee-track {
  display: flex; gap: 28px; white-space: nowrap; width: max-content;
  animation: scroll-x 32s linear infinite;
  font-family: var(--font-mono); font-size: 1rem; color: var(--ink-soft);
}
.marquee-track span:nth-child(even) { color: var(--accent); }
.marquee:hover .marquee-track { animation-play-state: paused; }

/* ============================================================
   SECTIONS
   ============================================================ */
.section {
  max-width: var(--maxw); margin: 0 auto;
  padding: clamp(70px, 12vh, 130px) clamp(20px, 5vw, 56px);
}
.section-head { display: flex; align-items: center; gap: 18px; margin-bottom: 56px; }
.section-index {
  font-family: var(--font-mono); font-size: .9rem; color: var(--accent);
  border: 1px solid var(--line); border-radius: 8px; padding: 4px 10px;
}
.section-title {
  font-family: var(--font-display); font-weight: 500; letter-spacing: -.02em;
  font-size: clamp(2.1rem, 6vw, 3.6rem); line-height: 1;
}
.section-title::after {
  content: ""; display: inline-block; width: 10px; height: 10px;
  background: var(--accent); border-radius: 50%; margin-left: 10px;
  vertical-align: middle;
}

/* ---------- ABOUT ---------- */
.about-grid {
  display: grid; grid-template-columns: 320px 1fr; gap: clamp(32px, 6vw, 72px);
  align-items: start;
}
.about-portrait { position: sticky; top: 110px; }
.portrait-frame {
  aspect-ratio: 4/5; border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--line);
  background:
    radial-gradient(120% 80% at 30% 0%, rgba(200,251,60,.16), transparent 55%),
    linear-gradient(160deg, var(--bg-card), #0e0e10);
  display: grid; place-items: center; position: relative;
}
.portrait-frame::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image: linear-gradient(var(--line-soft) 1px, transparent 1px),
                    linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
  background-size: 28px 28px; opacity: .5;
}
.portrait-frame:has(img)::after { display: none; }
.portrait-frame img { width: 100%; height: 100%; object-fit: cover; }
.portrait-initials {
  font-family: var(--font-display); font-style: italic; font-weight: 300;
  font-size: 5rem; color: var(--ink); position: relative; z-index: 1;
}
.portrait-tag {
  font-family: var(--font-mono); font-size: .78rem; color: var(--muted);
  margin-top: 14px; text-align: center;
}

.about-body .lead {
  font-family: var(--font-display); font-size: clamp(1.3rem, 2.4vw, 1.7rem);
  line-height: 1.45; font-weight: 400; margin-bottom: 22px; letter-spacing: -.01em;
}
.about-body p { color: var(--ink-soft); margin-bottom: 18px; max-width: 60ch; }
.about-body em { color: var(--muted); font-size: .92em; }

.about-facts {
  list-style: none; display: grid; grid-template-columns: repeat(2, 1fr);
  gap: 1px; background: var(--line); border: 1px solid var(--line);
  border-radius: var(--radius); overflow: hidden; margin-top: 30px;
}
.about-facts li {
  background: var(--bg-card); padding: 18px 20px;
  font-size: .98rem; color: var(--ink);
}
.about-facts span {
  display: block; font-family: var(--font-mono); font-size: .72rem;
  text-transform: uppercase; letter-spacing: .08em; color: var(--muted); margin-bottom: 4px;
}
.about-facts em { font-style: normal; color: var(--ink); }

/* ---------- SKILLS ---------- */
.skills-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.skill-card {
  background: var(--bg-card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 32px 28px;
  transition: transform .4s var(--ease), border-color .4s, background .4s;
  position: relative; overflow: hidden;
}
.skill-card::before {
  content: ""; position: absolute; inset: 0; opacity: 0; pointer-events: none;
  background: radial-gradient(70% 60% at 50% 0%, rgba(200,251,60,.1), transparent 70%);
  transition: opacity .4s;
}
.skill-card:hover { transform: translateY(-6px); border-color: #34341f; }
.skill-card:hover::before { opacity: 1; }
.skill-icon {
  font-family: var(--font-mono); font-size: 1.5rem; color: var(--accent);
  width: 52px; height: 52px; display: grid; place-items: center;
  border: 1px solid var(--line); border-radius: 12px; margin-bottom: 22px;
  background: var(--bg-elev);
}
.skill-card h3 {
  font-family: var(--font-display); font-weight: 500; font-size: 1.5rem;
  margin-bottom: 8px; letter-spacing: -.01em;
}
.skill-card > p { color: var(--ink-soft); font-size: .96rem; margin-bottom: 22px; }

.chips { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; }
.chips li {
  font-family: var(--font-mono); font-size: .78rem; color: var(--ink-soft);
  padding: 6px 12px; border: 1px solid var(--line); border-radius: 100px;
  background: var(--bg-elev); transform-origin: center;
  transition: color .25s, background-color .25s, border-color .25s, transform .25s var(--ease),
    font-weight .25s var(--ease), box-shadow .25s var(--ease);
}
.chips li:hover {
  color: #0b0b0d; background: var(--accent); border-color: var(--accent);
  transform: scale(1.1) translateY(-1px); font-weight: 600;
  box-shadow: 0 4px 16px -4px rgba(200,251,60,.5);
}
.chips.small li { font-size: .72rem; padding: 4px 10px; }

/* ---------- TIMELINE ---------- */
.timeline { position: relative; padding-left: 28px; }
.timeline::before {
  content: ""; position: absolute; left: 4px; top: 6px; bottom: 6px; width: 1px;
  background: linear-gradient(var(--accent), var(--line) 40%);
}
.tl-item { position: relative; margin-bottom: 26px; }
.tl-dot {
  position: absolute; left: -28px; top: 26px; width: 10px; height: 10px;
  border-radius: 50%; background: var(--bg); border: 2px solid var(--accent);
  transform: translateX(-0.5px);
}
.tl-card {
  background: var(--bg-card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 26px 28px;
  transition: transform .35s var(--ease), border-color .35s;
}
.tl-card:hover { transform: translateX(6px); border-color: #34341f; }
.tl-date {
  font-family: var(--font-mono); font-size: .76rem; color: var(--accent);
  letter-spacing: .04em;
}
.tl-card h3 {
  font-family: var(--font-display); font-weight: 500; font-size: 1.4rem;
  margin: 8px 0 2px; letter-spacing: -.01em;
}
.tl-org { font-size: .92rem; color: var(--muted); }
.tl-loc { display: block; font-family: var(--font-mono); font-size: .72rem; color: var(--muted); opacity: .8; margin-top: 2px; }
.tl-card p { color: var(--ink-soft); font-size: .96rem; margin: 12px 0 16px; max-width: 62ch; }

/* ---------- EDUCATION ---------- */
.edu-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.edu-card {
  background: var(--bg-card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 32px 30px;
  transition: transform .35s var(--ease), border-color .35s;
}
.edu-card:hover { transform: translateY(-5px); border-color: #34341f; }
.edu-year {
  font-family: var(--font-mono); font-size: .78rem; color: var(--accent);
}
.edu-card h3 {
  font-family: var(--font-display); font-weight: 500; font-size: 1.6rem;
  margin: 10px 0 4px; letter-spacing: -.01em;
}
.edu-school { font-size: .95rem; color: var(--muted); }
.edu-card p { color: var(--ink-soft); font-size: .96rem; margin-top: 14px; }

/* ---------- CONTACT ---------- */
.contact-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: clamp(32px, 6vw, 64px);
  align-items: start;
}
.contact-h {
  font-family: var(--font-display); font-weight: 400;
  font-size: clamp(1.9rem, 4vw, 2.8rem); line-height: 1.1; letter-spacing: -.02em;
}
.contact-sub { color: var(--ink-soft); margin: 18px 0 28px; max-width: 42ch; }

.contact-list { list-style: none; display: grid; gap: 18px; margin-bottom: 30px; }
.contact-list li { display: flex; flex-direction: column; gap: 3px; }
.ci-label {
  font-family: var(--font-mono); font-size: .72rem; text-transform: uppercase;
  letter-spacing: .08em; color: var(--muted);
}
.contact-list a { color: var(--ink); border-bottom: 1px solid var(--line); width: fit-content; transition: border-color .25s, color .25s; }
.contact-list a:hover { color: var(--accent); border-color: var(--accent); }

.contact-socials { display: flex; gap: 12px; }
.contact-socials a {
  width: 46px; height: 46px; display: grid; place-items: center;
  border: 1px solid var(--line); border-radius: 12px; color: var(--ink-soft);
  background: var(--bg-card); transition: all .3s var(--ease);
}
.contact-socials a:hover {
  color: var(--accent-ink); background: var(--accent); border-color: var(--accent);
  transform: translateY(-3px);
}

/* form */
.contact-form {
  background: var(--bg-card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: clamp(26px, 4vw, 38px);
}
.field { margin-bottom: 20px; }
.field label {
  display: block; font-family: var(--font-mono); font-size: .76rem;
  text-transform: uppercase; letter-spacing: .06em; color: var(--ink-soft); margin-bottom: 8px;
}
.field input, .field textarea {
  width: 100%; background: var(--bg-elev); border: 1px solid var(--line);
  border-radius: 12px; padding: 14px 16px; color: var(--ink);
  font-family: var(--font-body); font-size: 1rem; transition: border-color .25s, box-shadow .25s;
  resize: vertical;
}
.field input::placeholder, .field textarea::placeholder { color: var(--muted); }
.field input:focus, .field textarea:focus {
  outline: none; border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(200,251,60,.14);
}
.field.invalid input, .field.invalid textarea { border-color: var(--danger); }
.field-error {
  display: block; font-family: var(--font-mono); font-size: .74rem;
  color: var(--danger); margin-top: 6px; min-height: 1em;
}

.form-status {
  font-family: var(--font-mono); font-size: .84rem; margin-top: 14px; min-height: 1.2em;
}
.form-status.success { color: var(--accent-2); }
.form-status.error { color: var(--danger); }

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  border-top: 1px solid var(--line); margin-top: 40px;
  padding: 48px clamp(20px, 5vw, 56px) 34px;
  max-width: var(--maxw); margin-left: auto; margin-right: auto;
}
.footer-top {
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 22px; padding-bottom: 34px; border-bottom: 1px solid var(--line);
}
.footer-brand { font-family: var(--font-display); font-style: italic; font-size: 1.7rem; }
.footer-nav { display: flex; gap: 26px; }
.footer-nav a { font-size: .92rem; color: var(--ink-soft); transition: color .25s; }
.footer-nav a:hover { color: var(--accent); }
.footer-bottom {
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px;
  margin-top: 26px; font-family: var(--font-mono); font-size: .8rem; color: var(--muted);
}
.to-top { transition: color .25s; }
.to-top:hover { color: var(--accent); }

/* ============================================================
   REVEAL ANIMATION
   ============================================================ */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .8s var(--ease), transform .8s var(--ease); transition-delay: calc(var(--d, 0) * .08s); }
.reveal.in { opacity: 1; transform: none; }

/* hero reveals fire on load */
.hero .reveal { animation: rise .9s var(--ease) forwards; animation-delay: calc(var(--d, 0) * .1s); opacity: 0; }
@keyframes rise { to { opacity: 1; transform: none; } }

/* ============================================================
   KEYFRAMES
   ============================================================ */
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: .35; } }
@keyframes blink { 50% { opacity: 0; } }
@keyframes ring {
  0% { box-shadow: 0 0 0 0 rgba(111,240,201,.55); }
  70% { box-shadow: 0 0 0 9px rgba(111,240,201,0); }
  100% { box-shadow: 0 0 0 0 rgba(111,240,201,0); }
}
@keyframes drop { 0% { transform: scaleY(0); transform-origin: top; } 50% { transform: scaleY(1); transform-origin: top; } 51% { transform-origin: bottom; } 100% { transform: scaleY(0); transform-origin: bottom; } }
@keyframes scroll-x { to { transform: translateX(-50%); } }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 900px) {
  .about-grid { grid-template-columns: 1fr; }
  .about-portrait { position: static; max-width: 280px; }
  .skills-grid { grid-template-columns: 1fr; }
  .edu-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  body { font-size: 16px; }

  .nav-toggle { display: flex; z-index: 60; }
  .nav-links {
    position: fixed; inset: 0 0 0 auto; width: min(78vw, 320px);
    flex-direction: column; align-items: flex-start; justify-content: center;
    gap: 26px; padding: 40px;
    background: var(--bg-elev); border-left: 1px solid var(--line);
    transform: translateX(100%); transition: transform .4s var(--ease);
  }
  .nav-links.open { transform: translateX(0); }
  .nav-links a { font-size: 1.3rem; font-family: var(--font-display); }
  .nav-cta { font-family: var(--font-mono); font-size: 1rem; }

  .hero { min-height: auto; padding-top: 70px; padding-bottom: 80px; }
  .hero-actions .btn { flex: 1 1 auto; justify-content: center; }
  .scroll-hint { display: none; }

  .section-head { margin-bottom: 38px; }
  .footer-top { flex-direction: column; align-items: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; }
}