/* ============================================================================
   Портфолио — Владислав Наумов. Dark dev-portfolio, Go-cyan + violet accent.
   ========================================================================== */
:root {
  --bg: #0a0d13;
  --bg-2: #0ف1318;
  --surface: #141a24;
  --surface-2: #1a2230;
  --line: #232c3a;
  --text: #e7ebf2;
  --muted: #9aa6b6;
  --faint: #69748a;
  --go: #00add8;
  --go-2: #45d4ff;
  --violet: #8b5cf6;
  --grad: linear-gradient(120deg, #00add8, #8b5cf6);

  --font-sans: "Inter", system-ui, -apple-system, sans-serif;
  --font-display: "Space Grotesk", var(--font-sans);
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Consolas, monospace;

  --container: 1140px; --narrow: 760px;
  --gutter: clamp(1.1rem, .6rem + 3vw, 2.5rem);
  --r-sm:8px; --r-md:14px; --r-lg:22px; --r-full:999px;
  --ease:cubic-bezier(.4,0,.2,1); --ease-out:cubic-bezier(.16,1,.3,1);
  --dur-fast:150ms; --dur:260ms; --dur-slow:560ms; --z-header:100; --z-modal:1000;
}
/* fix accidental cyrillic char in token above */
:root { --bg-2: #0f1318; }

*,*::before,*::after{box-sizing:border-box}*{margin:0}
html{scroll-behavior:smooth;scroll-padding-top:80px;-webkit-text-size-adjust:100%}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation-duration:.001ms!important;transition-duration:.001ms!important}}
body{font-family:var(--font-sans);font-size:clamp(.98rem,.94rem+.2vw,1.05rem);line-height:1.65;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{display:block;max-width:100%;height:auto}
a{color:var(--go-2);text-decoration:none}
h1,h2,h3{font-family:var(--font-display);line-height:1.1;font-weight:700;letter-spacing:-.02em}

.container{width:100%;max-width:var(--container);margin-inline:auto;padding-inline:var(--gutter)}
.u-visually-hidden{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.skip-link{position:absolute;left:50%;translate:-50% -130%;top:8px;z-index:var(--z-modal);background:var(--go);color:#012;padding:.5rem 1rem;border-radius:var(--r-sm);font-weight:600;transition:translate var(--dur) var(--ease)}
.skip-link:focus{translate:-50% 0}
:focus-visible{outline:2px solid var(--go-2);outline-offset:3px}

.eyebrow{display:inline-flex;align-items:center;gap:.6rem;font-family:var(--font-mono);font-size:.8rem;letter-spacing:.05em;color:var(--go-2);text-transform:uppercase}
.eyebrow::before{content:"";width:26px;height:1px;background:var(--go)}
.grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:.55rem;font:inherit;font-weight:600;line-height:1;padding:.85rem 1.5rem;border:1px solid transparent;border-radius:var(--r-full);cursor:pointer;text-decoration:none;transition:transform var(--dur-fast) var(--ease),box-shadow var(--dur) var(--ease),background var(--dur) var(--ease),border-color var(--dur) var(--ease)}
.btn--primary{background:var(--grad);color:#fff;box-shadow:0 8px 26px rgba(0,173,216,.32)}
.btn--primary:hover{transform:translateY(-2px);box-shadow:0 14px 36px rgba(0,173,216,.45)}
.btn--ghost{background:transparent;border-color:var(--line);color:var(--text)}
.btn--ghost:hover{border-color:var(--go);color:var(--go-2);background:rgba(0,173,216,.06)}
.btn--sm{padding:.55rem 1rem;font-size:.9rem}

/* Header */
.site-header{position:sticky;top:0;z-index:var(--z-header);background:color-mix(in srgb,var(--bg) 82%,transparent);backdrop-filter:saturate(160%) blur(12px);border-bottom:1px solid var(--line)}
.site-header__inner{display:flex;align-items:center;gap:1rem;padding-block:.85rem}
.lang-switch{display:inline-flex;align-items:center;gap:2px;padding:3px;border:1px solid var(--line,#232c3a);border-radius:999px;background:rgba(255,255,255,.02)}
.lang-switch .lang{font:600 12px/1 "JetBrains Mono",ui-monospace,monospace;letter-spacing:.06em;padding:6px 10px;border-radius:999px;color:var(--muted,#8a96a8);text-decoration:none;transition:.18s}
.lang-switch .lang:hover{color:#fff}
.lang-switch .lang--active{background:linear-gradient(135deg,var(--go,#00add8),var(--violet,#8b5cf6));color:#fff}
@media (max-width:560px){.lang-switch .lang{padding:5px 8px;font-size:11px}}
.logo{display:inline-flex;align-items:center;gap:.6rem;color:var(--text);font-family:var(--font-display);font-weight:700}
.logo__mark{width:38px;height:38px;border-radius:11px;display:grid;place-items:center;background:var(--grad);color:#fff;font-size:.95rem}
.logo b{color:#fff} .logo span{color:var(--go-2)}
.nav{margin-left:auto}
.nav__menu{list-style:none;display:flex;gap:1.7rem;padding:0}
.nav__menu a{color:var(--muted);font-weight:500;font-size:.94rem;transition:color var(--dur-fast) var(--ease)}
.nav__menu a:hover{color:var(--text)}
.nav__toggle{display:none;background:none;border:0;padding:.4rem;cursor:pointer}
.nav__burger,.nav__burger::before,.nav__burger::after{display:block;width:24px;height:2px;background:var(--text);border-radius:2px;transition:var(--dur) var(--ease)}
.nav__burger::before,.nav__burger::after{content:"";position:relative}.nav__burger::before{top:-7px}.nav__burger::after{top:5px}

/* Hero */
.hero{position:relative;padding-block:clamp(3rem,1.5rem+8vw,6.5rem);overflow:hidden}
.hero__glow{position:absolute;inset:-30% -10% auto -10%;height:130%;z-index:0;pointer-events:none;
  background:radial-gradient(40% 50% at 20% 15%,rgba(0,173,216,.22),transparent 60%),radial-gradient(40% 50% at 85% 10%,rgba(139,92,246,.20),transparent 60%);filter:blur(10px)}
.hero__inner{position:relative;z-index:1;display:grid;gap:var(--sp,2rem);align-items:center}
.hero__title{font-size:clamp(2.6rem,1.6rem+4vw,4.6rem);color:#fff;margin:1rem 0 .8rem}
.hero__role{font-family:var(--font-mono);color:var(--go-2);font-size:1.05rem}
.hero__lead{font-size:1.15rem;color:var(--muted);max-width:52ch;margin:1.2rem 0 0}
.hero__actions{display:flex;flex-wrap:wrap;gap:.9rem;margin-top:1.8rem}
.hero__contacts{display:flex;flex-wrap:wrap;gap:.6rem;margin-top:1.8rem}
.chip{display:inline-flex;align-items:center;gap:.45rem;background:var(--surface);border:1px solid var(--line);color:var(--muted);font-size:.86rem;padding:.45rem .9rem;border-radius:var(--r-full);transition:border-color var(--dur) var(--ease),color var(--dur) var(--ease)}
.chip:hover{border-color:var(--go);color:var(--text)}

/* Code card (hero visual) */
.codecard{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;box-shadow:0 30px 70px rgba(0,0,0,.4);font-family:var(--font-mono);font-size:.82rem}
.codecard__bar{display:flex;align-items:center;gap:.4rem;padding:.7rem .9rem;background:var(--surface-2);border-bottom:1px solid var(--line)}
.codecard__bar i{width:11px;height:11px;border-radius:50%;background:#3a4658}
.codecard__bar i:nth-child(1){background:#ff5f57}.codecard__bar i:nth-child(2){background:#febc2e}.codecard__bar i:nth-child(3){background:#28c840}
.codecard__bar span{margin-left:.6rem;color:var(--faint)}
.codecard pre{margin:0;padding:1.1rem;overflow-x:auto;line-height:1.6;color:#c7d0dc}
.codecard .k{color:#ff7b72}.codecard .s{color:#a5d6ff}.codecard .f{color:#d2a8ff}.codecard .c{color:#6b7585}

/* Sections */
.section{padding-block:clamp(3rem,1.6rem+6vw,5.5rem)}
.section--alt{background:var(--bg-2)}
.section__head{max-width:var(--narrow);margin:0 auto 2.6rem;text-align:center}
.section__title{font-size:clamp(1.9rem,1.3rem+2.4vw,2.9rem);color:#fff;margin-top:.6rem}
.section__subtitle{color:var(--muted);margin-top:.8rem}

/* Stats */
.stats{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden}
.stat{background:var(--surface);padding:1.5rem 1rem;text-align:center}
.stat b{display:block;font-family:var(--font-display);font-size:1.7rem;color:#fff}
.stat span{font-size:.85rem;color:var(--faint)}

/* Skills */
.skills{display:grid;gap:1.2rem;grid-template-columns:1fr}
.skillgroup{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);padding:1.5rem}
.skillgroup h3{font-size:1rem;color:var(--go-2);font-family:var(--font-mono);margin-bottom:1rem;font-weight:500}
.skillgroup__list{display:flex;flex-wrap:wrap;gap:.5rem}
.tag{background:var(--surface-2);border:1px solid var(--line);color:var(--text);font-size:.85rem;padding:.4rem .8rem;border-radius:var(--r-sm)}

/* Filters */
.filters{display:flex;flex-wrap:wrap;gap:.6rem;justify-content:center;margin-bottom:2.2rem}
.filter{background:var(--surface);border:1px solid var(--line);color:var(--muted);font:inherit;font-size:.9rem;padding:.5rem 1.1rem;border-radius:var(--r-full);cursor:pointer;transition:all var(--dur) var(--ease)}
.filter:hover{color:var(--text)}
.filter.is-active{background:var(--grad);color:#fff;border-color:transparent}

/* Project grid */
.grid{display:grid;gap:1.6rem;grid-template-columns:1fr}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;display:flex;flex-direction:column;transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease)}
.card:hover{transform:translateY(-5px);border-color:#2f3b4d;box-shadow:0 24px 50px rgba(0,0,0,.4)}
.card__media{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--surface-2);border-bottom:1px solid var(--line)}
.card__media img.shot{width:100%;height:100%;object-fit:cover;object-position:top}
/* device collage: desktop + phone overlay */
.collage .desk{width:100%;height:100%;object-fit:cover;object-position:top left}
.collage::after{content:"";position:absolute;inset:0;background:linear-gradient(120deg,transparent 55%,rgba(10,13,19,.55));pointer-events:none}
.collage .phone{position:absolute;right:14px;bottom:10px;width:29%;aspect-ratio:9/17;object-fit:cover;object-position:top;
  border-radius:12px;border:3px solid #0a0d13;outline:1px solid rgba(255,255,255,.12);
  box-shadow:0 14px 30px rgba(0,0,0,.6);z-index:2}
.card__badge{position:absolute;top:10px;left:10px;background:rgba(10,13,19,.78);backdrop-filter:blur(4px);color:#fff;font-size:.72rem;font-weight:600;padding:.3rem .7rem;border-radius:var(--r-full);border:1px solid var(--line)}
.card__body{padding:1.4rem 1.5rem 1.5rem;display:flex;flex-direction:column;flex:1}
.card__title{font-size:1.3rem;color:#fff}
.card__desc{color:var(--muted);font-size:.95rem;margin-top:.5rem;flex:1}
.card__tags{display:flex;flex-wrap:wrap;gap:.4rem;margin-top:1rem}
.card__tags .tag{font-size:.76rem;padding:.25rem .6rem;background:transparent;color:var(--faint)}
.card__links{display:flex;gap:.6rem;margin-top:1.2rem}

/* Contact */
.contact{text-align:center;max-width:var(--narrow);margin:0 auto}
.contact .hero__contacts{justify-content:center}

/* Footer */
.site-footer{border-top:1px solid var(--line);padding-block:1.8rem;color:var(--faint)}
.site-footer__inner{display:flex;flex-wrap:wrap;gap:.8rem;justify-content:space-between;font-size:.9rem}
.site-footer a{color:var(--muted)}

/* Reveal */
[data-reveal]{opacity:0;transform:translateY(22px);transition:opacity var(--dur-slow) var(--ease-out),transform var(--dur-slow) var(--ease-out)}
[data-reveal].is-visible{opacity:1;transform:none}
.is-hidden{display:none!important}

/* Ken Burns — медленный зум скриншота при наведении на карточку */
@media (prefers-reduced-motion: no-preference){
  .card__media img.shot,.collage .desk{transition:transform 5s var(--ease)}
  .card:hover .card__media img.shot,.card:hover .collage .desk{transform:scale(1.07)}
}
/* Parallax tilt для код-карточки в hero */
.hero__inner > div:last-child{perspective:1000px}
.codecard{transition:transform .12s ease-out;will-change:transform}

/* SVG icons */
.ic{width:1.05em;height:1.05em;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;flex:none;vertical-align:-.15em}

/* Reading progress bar */
.progress{position:fixed;top:0;left:0;height:3px;width:0;z-index:calc(var(--z-header) + 1);background:var(--grad);transition:width .1s linear}
/* Active nav link */
.nav__menu a.active{color:#fff}
.nav__menu a.active::after{content:"";display:block;height:2px;border-radius:2px;background:var(--grad);margin-top:3px}

/* chip as button */
button.chip{font:inherit;cursor:pointer}
.copy-hint{color:var(--faint);font-size:.72rem;border:1px solid var(--line);border-radius:var(--r-full);padding:1px 7px;margin-left:.2rem}
button.chip:hover .copy-hint{color:var(--go-2);border-color:var(--go)}

/* Lightbox */
.card__media img.shot,.collage .desk{cursor:zoom-in}
.lightbox{position:fixed;inset:0;z-index:var(--z-modal);display:none;place-items:center;padding:4vmin;
  background:rgba(5,8,12,.9);backdrop-filter:blur(6px)}
.lightbox.is-open{display:grid}
.lightbox img{max-width:100%;max-height:92vh;border-radius:12px;border:1px solid var(--line);box-shadow:0 30px 80px rgba(0,0,0,.6)}
.lightbox__close{position:absolute;top:18px;right:22px;width:44px;height:44px;border-radius:50%;border:1px solid var(--line);
  background:var(--surface);color:#fff;font-size:1.2rem;cursor:pointer}
.lightbox__close:hover{border-color:var(--go);color:var(--go-2)}

/* Toast */
.toast{position:fixed;left:50%;bottom:28px;translate:-50% 120%;z-index:var(--z-modal);background:var(--surface);
  border:1px solid var(--go);color:#fff;padding:.7rem 1.2rem;border-radius:var(--r-full);font-size:.9rem;
  box-shadow:0 10px 30px rgba(0,0,0,.4);opacity:0;transition:translate .3s var(--ease-out),opacity .3s}
.toast.is-show{translate:-50% 0;opacity:1}

/* Hero identity: avatar + status (изюминка) */
.hero__id{display:flex;align-items:center;gap:1rem;margin-bottom:1.4rem}
.hero__avatar{position:relative;width:88px;height:88px;border-radius:50%;padding:3px;display:inline-grid;place-items:center;
  background:linear-gradient(135deg,var(--go),var(--violet))}
.hero__avatar img{width:100%;height:100%;border-radius:50%;object-fit:cover;border:3px solid var(--bg);background:var(--surface)}
.status{display:inline-flex;align-items:center;gap:.5rem;font-size:.9rem;color:var(--muted);background:var(--surface);border:1px solid var(--line);padding:.4rem .9rem;border-radius:var(--r-full)}
.status i{width:8px;height:8px;border-radius:50%;background:#34d399;box-shadow:0 0 0 0 rgba(52,211,153,.6);animation:pulse 1.8s infinite}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(52,211,153,.5)}70%{box-shadow:0 0 0 9px rgba(52,211,153,0)}100%{box-shadow:0 0 0 0 rgba(52,211,153,0)}}
/* typewriter */
.typed{color:var(--go-2)} .caret{color:var(--go-2);animation:blink 1s step-end infinite}
@keyframes blink{50%{opacity:0}}
/* animated aurora on hero glow */
.hero__glow{animation:aurora 14s ease-in-out infinite alternate}
@keyframes aurora{0%{transform:translate3d(-3%,0,0) scale(1)}100%{transform:translate3d(4%,2%,0) scale(1.12)}}
@media (prefers-reduced-motion:reduce){.hero__glow,.caret,.status i{animation:none}}

/* Responsive */
@media (min-width:640px){ .stats{grid-template-columns:repeat(4,1fr)} .grid{grid-template-columns:repeat(2,1fr)} .skills{grid-template-columns:repeat(2,1fr)} }
@media (min-width:920px){ .hero__inner{grid-template-columns:1.15fr .85fr} .grid{grid-template-columns:repeat(3,1fr)} .skills{grid-template-columns:repeat(4,1fr)} }
@media (max-width:860px){
  .nav__toggle{display:inline-flex}
  .nav__menu{position:absolute;inset:100% 0 auto 0;flex-direction:column;gap:0;background:var(--bg-2);border-bottom:1px solid var(--line);padding:.4rem var(--gutter);display:none}
  .nav__menu.is-open{display:flex}.nav__menu li{padding-block:.7rem;border-bottom:1px solid var(--line)}
}