/* =====================================================================
   jurajchudy.sk — štýl
   Téma: „transpondér / spektrum" — nočná farba operačného centra,
   signálová mätovo-azúrová a teplá nosná oranžová. Podpisový prvok:
   konštelačný diagram (QPSK/8PSK) z demodulácie DVB-S2 signálu.
   ===================================================================== */

:root {
    --ink:        #090C12;
    --panel:      #10151F;
    --raised:     #161D2A;
    --hairline:   #262E3D;
    --hairline-2: #313B4D;

    --text-hi:    #EAEEF6;
    --text-mid:   #A6B1C6;
    --text-lo:    #6C778E;

    --signal:     #5BE0B0;  /* zámok signálu / mätová */
    --signal-dim: #2f7a63;
    --carrier:    #FF8C5C;  /* nosná / dôraz */
    --carrier-dim:#7a4530;

    --maxw: 1180px;
    --r: 14px;
    --r-sm: 9px;

    --f-display: "Space Grotesk", system-ui, sans-serif;
    --f-body:    "IBM Plex Sans", system-ui, sans-serif;
    --f-mono:    "JetBrains Mono", ui-monospace, monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
    margin: 0;
    background: var(--ink);
    color: var(--text-mid);
    font-family: var(--f-body);
    font-size: 17px;
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
    overflow-x: hidden;
}

/* jemný šum / grid pozadie celej stránky */
body::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background-image:
        linear-gradient(var(--hairline) 1px, transparent 1px),
        linear-gradient(90deg, var(--hairline) 1px, transparent 1px);
    background-size: 64px 64px;
    opacity: .12;
    mask-image: radial-gradient(circle at 50% 30%, #000 0%, transparent 80%);
    -webkit-mask-image: radial-gradient(circle at 50% 30%, #000 0%, transparent 80%);
}

a { color: var(--signal); text-decoration: none; }
img { max-width: 100%; display: block; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; position: relative; z-index: 1; }

h1, h2, h3, h4 { font-family: var(--f-display); color: var(--text-hi); line-height: 1.12; font-weight: 600; margin: 0; }

/* ---- eyebrow / section label (mono, signálový) ---- */
.eyebrow {
    font-family: var(--f-mono);
    font-size: 12.5px;
    letter-spacing: .22em;
    text-transform: uppercase;
    color: var(--signal);
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin: 0 0 18px;
}
.eyebrow::before {
    content: "";
    width: 26px; height: 1px;
    background: var(--signal);
    opacity: .7;
}

/* ===================== NAV ===================== */
.nav {
    position: sticky;
    top: 0;
    z-index: 50;
    backdrop-filter: blur(12px);
    background: rgba(9,12,18,.72);
    border-bottom: 1px solid var(--hairline);
}
.nav-inner {
    max-width: var(--maxw);
    margin: 0 auto;
    padding: 14px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}
.brand {
    font-family: var(--f-mono);
    font-size: 15px;
    color: var(--text-hi);
    letter-spacing: .02em;
    display: flex;
    align-items: center;
    gap: 11px;
    white-space: nowrap;
}
.brand .dot {
    width: 9px; height: 9px; border-radius: 50%;
    background: var(--signal);
    box-shadow: 0 0 0 0 rgba(91,224,176,.6);
    animation: lock 2.4s ease-out infinite;
}
@keyframes lock {
    0%   { box-shadow: 0 0 0 0 rgba(91,224,176,.55); }
    70%  { box-shadow: 0 0 0 8px rgba(91,224,176,0); }
    100% { box-shadow: 0 0 0 0 rgba(91,224,176,0); }
}
.brand b { color: var(--signal); font-weight: 600; }
.nav-links { display: flex; gap: 4px; list-style: none; margin: 0; padding: 0; }
.nav-links a {
    color: var(--text-mid);
    font-size: 14.5px;
    padding: 8px 13px;
    border-radius: var(--r-sm);
    transition: color .18s, background .18s;
}
.nav-links a:hover { color: var(--text-hi); background: var(--raised); }
.nav-right { display: flex; align-items: center; gap: 16px; }
.lang-switch {
    display: inline-flex; align-items: center; gap: 6px;
    font-family: var(--f-mono); font-size: 12.5px;
    color: var(--text-lo); letter-spacing: .04em;
    padding-left: 16px; border-left: 1px solid var(--hairline);
}
.lang-switch a { color: var(--text-lo); padding: 4px 5px; border-radius: 5px; transition: color .18s; }
.lang-switch a:hover { color: var(--text-hi); }
.lang-switch a.on { color: var(--signal); }
.nav-toggle {
    display: none;
    background: none; border: 1px solid var(--hairline-2);
    color: var(--text-hi); border-radius: var(--r-sm);
    width: 42px; height: 38px; cursor: pointer; font-size: 18px;
}

/* ===================== HERO ===================== */
.hero { position: relative; padding: 74px 0 64px; }
.hero-grid {
    display: grid;
    grid-template-columns: 1.05fr .95fr;
    gap: 48px;
    align-items: center;
}
.hero h1 {
    font-size: clamp(2.6rem, 6vw, 4.4rem);
    letter-spacing: -.02em;
    margin: 14px 0 0;
}
.hero h1 .accent { color: var(--signal); }
.hero .role {
    font-family: var(--f-mono);
    font-size: 14px;
    color: var(--carrier);
    letter-spacing: .04em;
    margin-top: 18px;
}
.hero .lead {
    font-size: 1.18rem;
    color: var(--text-mid);
    margin: 22px 0 30px;
    max-width: 38ch;
}
.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; }

.btn {
    font-family: var(--f-mono);
    font-size: 13.5px;
    letter-spacing: .03em;
    padding: 13px 22px;
    border-radius: var(--r-sm);
    border: 1px solid transparent;
    cursor: pointer;
    transition: transform .15s, background .2s, border-color .2s, color .2s;
    display: inline-flex; align-items: center; gap: 9px;
}
.btn:hover { transform: translateY(-2px); }
.btn svg { width: 16px; height: 16px; flex-shrink: 0; }
.btn-primary { background: var(--signal); color: #06231a; font-weight: 600; }
.btn-primary:hover { background: #74ecc1; }
.btn-ghost { border-color: var(--hairline-2); color: var(--text-hi); background: transparent; }
.btn-ghost:hover { border-color: var(--signal); color: var(--signal); }

/* konštelačný diagram — signature */
.scope {
    position: relative;
    aspect-ratio: 1 / 1;
    border: 1px solid var(--hairline-2);
    border-radius: var(--r);
    background:
        radial-gradient(circle at 50% 50%, rgba(91,224,176,.06), transparent 70%),
        var(--panel);
    overflow: hidden;
    box-shadow: 0 30px 80px -40px rgba(0,0,0,.9);
}
.scope canvas { width: 100%; height: 100%; display: block; }
.scope .scope-hud {
    position: absolute;
    left: 14px; bottom: 12px; right: 14px;
    display: flex; justify-content: space-between;
    font-family: var(--f-mono); font-size: 11px;
    color: var(--text-lo); letter-spacing: .08em;
    pointer-events: none;
}
.scope .scope-hud b { color: var(--signal); font-weight: 500; }
.scope .scope-tag {
    position: absolute; top: 12px; left: 14px;
    font-family: var(--f-mono); font-size: 11px;
    letter-spacing: .14em; color: var(--text-lo);
    text-transform: uppercase;
}

/* status pásik pod hero */
.status {
    margin-top: 52px;
    border: 1px solid var(--hairline);
    border-radius: var(--r);
    background: linear-gradient(180deg, var(--panel), rgba(16,21,31,.4));
    display: grid;
    grid-template-columns: repeat(4, 1fr);
}
.status div {
    padding: 18px 22px;
    border-right: 1px solid var(--hairline);
}
.status div:last-child { border-right: none; }
.status .k {
    font-family: var(--f-mono); font-size: 11px;
    letter-spacing: .18em; color: var(--text-lo); text-transform: uppercase;
}
.status .v { color: var(--text-hi); font-size: 15px; margin-top: 5px; font-family: var(--f-display); }

/* ===================== SECTION base ===================== */
.section { padding: 96px 0; position: relative; }
.section[id], section[id] { scroll-margin-top: 80px; }
.section-head { max-width: 640px; margin-bottom: 52px; }
.section-head h2 { font-size: clamp(1.9rem, 3.6vw, 2.7rem); letter-spacing: -.015em; }
.section-head p { margin: 16px 0 0; color: var(--text-mid); }

/* divider so signálovým bodom */
.rule { height: 1px; background: var(--hairline); margin: 0; position: relative; }
.rule::after {
    content: ""; position: absolute; left: 0; top: -1px;
    width: 64px; height: 3px; background: var(--signal);
}

/* ===================== O MNE ===================== */
.about-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 48px; align-items: start; }
.about-body p { margin: 0 0 18px; }
.about-body p:last-child { margin-bottom: 0; }
.about-body strong { color: var(--text-hi); font-weight: 600; }
.about-card {
    border: 1px solid var(--hairline);
    border-radius: var(--r);
    background: var(--panel);
    padding: 26px;
}
.about-card h4 { font-family: var(--f-mono); font-size: 12px; letter-spacing: .16em; color: var(--text-lo); text-transform: uppercase; margin-bottom: 18px; }
.kv { display: flex; justify-content: space-between; gap: 16px; padding: 11px 0; border-top: 1px solid var(--hairline); font-size: 14.5px; }
.kv:first-of-type { border-top: none; }
.kv span:first-child { color: var(--text-lo); font-family: var(--f-mono); font-size: 12.5px; letter-spacing: .04em; }
.kv span:last-child { color: var(--text-hi); text-align: right; }

/* ===================== DOMAINS ===================== */
.domains { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.dcard {
    border: 1px solid var(--hairline);
    border-radius: var(--r);
    background: var(--panel);
    padding: 30px 28px;
    position: relative;
    overflow: hidden;
    transition: border-color .25s, transform .25s;
}
.dcard::before {
    content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 3px;
    background: linear-gradient(var(--signal), var(--carrier));
    opacity: 0; transition: opacity .25s;
}
.dcard:hover { border-color: var(--hairline-2); transform: translateY(-4px); }
.dcard:hover::before { opacity: 1; }
.dcard .tag { position: absolute; top: 22px; right: 24px; font-family: var(--f-mono); font-size: 12px; color: var(--text-lo); letter-spacing: .1em; }
.dcard .ico {
    width: 46px; height: 46px; border-radius: 11px;
    display: grid; place-items: center;
    background: var(--raised); border: 1px solid var(--hairline-2);
    color: var(--signal); margin-bottom: 20px;
}
.dcard .ico svg { width: 23px; height: 23px; }
.dcard h3 { font-size: 1.32rem; margin-bottom: 12px; }
.dcard p { margin: 0 0 18px; font-size: 15.5px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
    font-family: var(--f-mono); font-size: 11.5px;
    color: var(--text-mid);
    padding: 5px 11px;
    border: 1px solid var(--hairline-2);
    border-radius: 999px;
    letter-spacing: .02em;
}

/* ===================== STACK + SIGNALS ===================== */
.stack-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 48px; align-items: start; }
.stackcol { display: flex; flex-direction: column; gap: 24px; }
.stackrow { }
.stackrow h4 {
    font-family: var(--f-mono); font-size: 12px; letter-spacing: .14em;
    color: var(--carrier); text-transform: uppercase; margin-bottom: 13px;
}
.stackrow .chips .chip { background: var(--panel); }
.stackrow .chips .chip:hover { border-color: var(--signal); color: var(--text-hi); }

.signals {
    border: 1px solid var(--hairline);
    border-radius: var(--r);
    background: var(--panel);
    padding: 30px 28px;
}
.signals h4 { font-family: var(--f-mono); font-size: 12px; letter-spacing: .14em; color: var(--text-lo); text-transform: uppercase; margin-bottom: 24px; }
.sig { margin-bottom: 22px; }
.sig:last-child { margin-bottom: 0; }
.sig-top { display: flex; justify-content: space-between; font-size: 14px; margin-bottom: 9px; }
.sig-top span:first-child { color: var(--text-hi); }
.sig-top span:last-child { font-family: var(--f-mono); color: var(--signal); font-size: 12.5px; }
.bars { display: flex; gap: 4px; height: 10px; }
.bars i {
    flex: 1; border-radius: 2px;
    background: var(--hairline);
    transition: background .5s ease;
}
.bars i.on { background: var(--signal); }
.bars i.on.warm { background: var(--carrier); }

/* ===================== PROJECTS ===================== */
.projects { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.pcard {
    border: 1px solid var(--hairline);
    border-radius: var(--r);
    background: var(--panel);
    padding: 26px;
    display: flex; flex-direction: column;
    transition: border-color .25s, transform .25s;
}
.pcard:hover { border-color: var(--hairline-2); transform: translateY(-4px); }
.pcard-top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; }
.pcard .lang { display: inline-flex; align-items: center; gap: 7px; font-family: var(--f-mono); font-size: 12px; color: var(--text-lo); }
.pcard .lang .led { width: 9px; height: 9px; border-radius: 50%; }
.lang.kotlin .led { background: #a97bff; }
.lang.python .led { background: #5BE0B0; }
.pcard .star { color: var(--carrier); font-family: var(--f-mono); font-size: 12px; }
.pcard h3 { font-size: 1.24rem; margin-bottom: 4px; }
.pcard .repo { font-family: var(--f-mono); font-size: 12px; color: var(--text-lo); margin-bottom: 14px; }
.pcard p { font-size: 14.5px; margin: 0 0 18px; flex-grow: 1; }
.pcard .ptags { display: flex; flex-wrap: wrap; gap: 7px; margin-bottom: 20px; }
.pcard .ptags span, .proj-head .ptags span { font-family: var(--f-mono); font-size: 11px; color: var(--text-mid); padding: 3px 9px; border: 1px solid var(--hairline); border-radius: 5px; }
.proj-head .ptags { display: flex; flex-wrap: wrap; gap: 8px; }
.pcard-links { display: flex; gap: 16px; padding-top: 16px; border-top: 1px solid var(--hairline); }
.pcard-links a { font-family: var(--f-mono); font-size: 13px; display: inline-flex; align-items: center; gap: 6px; color: var(--text-mid); transition: color .18s; }
.pcard-links a:hover { color: var(--signal); }
.pcard-links svg { width: 15px; height: 15px; }

.gh-banner {
    margin-top: 30px;
    border: 1px dashed var(--hairline-2);
    border-radius: var(--r);
    padding: 22px 28px;
    display: flex; align-items: center; justify-content: space-between; gap: 20px;
    flex-wrap: wrap;
    background: var(--panel);
}
.gh-banner p { margin: 0; color: var(--text-mid); font-size: 15px; }
.gh-banner b { color: var(--text-hi); }

/* ===================== CERTS ===================== */
.certs { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.ccard {
    border: 1px solid var(--hairline);
    border-radius: var(--r);
    background: var(--panel);
    overflow: hidden;
    transition: border-color .25s, transform .25s;
}
.ccard:hover { border-color: var(--hairline-2); transform: translateY(-4px); }
.ccard .cimg { aspect-ratio: 16/10; overflow: hidden; background: var(--raised); }
.ccard .cimg img { width: 100%; height: 100%; object-fit: cover; }
.ccard .cbody { padding: 22px 24px; }
.ccard .badge { font-family: var(--f-mono); font-size: 11px; letter-spacing: .12em; color: var(--signal); border: 1px solid var(--signal-dim); border-radius: 5px; padding: 3px 9px; display: inline-block; margin-bottom: 12px; }
.ccard h3 { font-size: 1.12rem; margin-bottom: 6px; line-height: 1.25; }
.ccard .issuer { font-size: 14px; color: var(--text-lo); }
.ccard.empty { border-style: dashed; display: grid; place-items: center; min-height: 220px; color: var(--text-lo); font-family: var(--f-mono); font-size: 13px; }

/* ===================== CONTACT ===================== */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 48px; align-items: start; }
.contact-aside h2 { font-size: clamp(1.9rem, 3.6vw, 2.7rem); margin-bottom: 18px; }
.contact-aside p { margin: 0 0 26px; }
.contact-line { display: flex; align-items: center; gap: 13px; padding: 14px 0; border-top: 1px solid var(--hairline); }
.contact-line:first-of-type { border-top: none; }
.contact-line .ci { width: 38px; height: 38px; border-radius: 9px; background: var(--raised); border: 1px solid var(--hairline-2); display: grid; place-items: center; color: var(--signal); }
.contact-line .ci svg { width: 18px; height: 18px; }
.contact-line a, .contact-line span.val { color: var(--text-hi); font-size: 15px; }
.socials { display: flex; gap: 12px; margin-top: 26px; }
.socials a {
    width: 44px; height: 44px; border-radius: 10px;
    border: 1px solid var(--hairline-2); background: var(--panel);
    display: grid; place-items: center; color: var(--text-mid);
    transition: color .2s, border-color .2s, transform .2s;
}
.socials a:hover { color: var(--signal); border-color: var(--signal); transform: translateY(-3px); }
.socials svg { width: 19px; height: 19px; }

.form {
    border: 1px solid var(--hairline);
    border-radius: var(--r);
    background: var(--panel);
    padding: 30px;
}
.form .field { margin-bottom: 18px; }
.form label { display: block; font-family: var(--f-mono); font-size: 12px; letter-spacing: .08em; color: var(--text-lo); text-transform: uppercase; margin-bottom: 8px; }
.form input, .form textarea {
    width: 100%;
    background: var(--ink);
    border: 1px solid var(--hairline-2);
    border-radius: var(--r-sm);
    color: var(--text-hi);
    font-family: var(--f-body);
    font-size: 15px;
    padding: 13px 15px;
    transition: border-color .2s, box-shadow .2s;
}
.form input:focus, .form textarea:focus {
    outline: none;
    border-color: var(--signal);
    box-shadow: 0 0 0 3px rgba(91,224,176,.14);
}
.form textarea { resize: vertical; min-height: 130px; }
.form .row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form .btn-primary { width: 100%; justify-content: center; margin-top: 6px; border: none; }
.form .note { font-family: var(--f-mono); font-size: 11.5px; color: var(--text-lo); margin-top: 14px; text-align: center; }

.alert { border-radius: var(--r-sm); padding: 13px 16px; font-size: 14px; margin-bottom: 20px; }
.alert.ok { background: rgba(91,224,176,.1); border: 1px solid var(--signal-dim); color: var(--signal); }
.alert.err { background: rgba(255,140,92,.1); border: 1px solid var(--carrier-dim); color: var(--carrier); }

/* ===================== FOOTER ===================== */
.footer { border-top: 1px solid var(--hairline); padding: 38px 0; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.footer .brand { font-size: 14px; }
.footer .small { font-family: var(--f-mono); font-size: 12.5px; color: var(--text-lo); }
.footer .small a { color: var(--text-mid); }

/* ===================== REVEAL ANIM ===================== */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
    .reveal { opacity: 1; transform: none; transition: none; }
    .brand .dot { animation: none; }
}

/* ===================== PROJECT DETAIL ===================== */
.project-detail { padding-top: 64px; }
.back-link {
    display: inline-flex; align-items: center; gap: 8px;
    font-family: var(--f-mono); font-size: 13px; color: var(--text-mid);
    margin-bottom: 30px; transition: color .18s;
}
.back-link:hover { color: var(--signal); }
.back-link svg { width: 16px; height: 16px; }

.proj-head { padding-bottom: 30px; border-bottom: 1px solid var(--hairline); margin-bottom: 40px; }
.proj-head-meta { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 18px; }
.proj-status {
    font-family: var(--f-mono); font-size: 11.5px; letter-spacing: .04em;
    color: var(--signal); background: rgba(91,224,176,.08);
    border: 1px solid var(--signal-dim); border-radius: 100px; padding: 4px 12px;
}
.proj-head h1 { font-size: clamp(30px, 5vw, 46px); line-height: 1.05; margin: 0 0 10px; }
.proj-head .repo { font-family: var(--f-mono); font-size: 13px; color: var(--text-lo); margin-bottom: 18px; }
.proj-lead { font-size: 18px; color: var(--text-mid); max-width: 720px; margin-bottom: 20px; }

.proj-grid { display: grid; grid-template-columns: 1fr 320px; gap: 48px; align-items: start; }
.proj-main { min-width: 0; }
.proj-block { margin-bottom: 40px; }
.proj-block h2 {
    font-size: 13px; font-family: var(--f-mono); font-weight: 500;
    text-transform: uppercase; letter-spacing: .12em; color: var(--signal);
    margin: 0 0 16px; padding-bottom: 10px; border-bottom: 1px solid var(--hairline);
}
.proj-block p { color: var(--text-mid); font-size: 16px; line-height: 1.75; }

.feature-list { list-style: none; margin: 0; padding: 0; }
.feature-list li {
    position: relative; padding-left: 26px; margin-bottom: 12px;
    color: var(--text-mid); line-height: 1.6;
}
.feature-list li::before {
    content: ""; position: absolute; left: 4px; top: 9px;
    width: 7px; height: 7px; border-radius: 2px;
    background: var(--signal); box-shadow: 0 0 8px rgba(91,224,176,.5);
}

.code-block {
    background: var(--ink); border: 1px solid var(--hairline); border-radius: var(--r-sm);
    padding: 18px 20px; overflow-x: auto;
    font-family: var(--f-mono); font-size: 13px; line-height: 1.9;
    color: var(--text-mid); white-space: pre; margin: 0;
}

.proj-aside { position: sticky; top: 92px; display: flex; flex-direction: column; gap: 18px; }
.proj-links { display: flex; flex-direction: column; gap: 12px; }
.proj-links .btn { width: 100%; justify-content: center; }

/* ===================== RESPONSIVE ===================== */
@media (max-width: 920px) {
    .hero-grid { grid-template-columns: 1fr; gap: 40px; }
    .scope { max-width: 420px; }
    .about-grid, .stack-grid, .contact-grid { grid-template-columns: 1fr; gap: 36px; }
    .projects, .certs { grid-template-columns: 1fr 1fr; }
    .proj-grid { grid-template-columns: 1fr; gap: 36px; }
    .proj-aside { position: static; }
    .status { grid-template-columns: 1fr 1fr; }
    .status div:nth-child(2) { border-right: none; }
    .status div:nth-child(1), .status div:nth-child(2) { border-bottom: 1px solid var(--hairline); }
}
@media (max-width: 640px) {
    body { font-size: 16px; }
    .nav-links {
        display: none;
        position: absolute; top: 100%; left: 0; right: 0;
        flex-direction: column; gap: 0;
        background: var(--ink); border-bottom: 1px solid var(--hairline);
        padding: 8px 16px 16px;
    }
    .nav-links.open { display: flex; }
    .nav-links a { padding: 12px 8px; }
    .nav-toggle { display: block; }
    .nav { position: relative; }
    .nav-right { gap: 10px; }
    .lang-switch { padding-left: 10px; }
    .domains, .projects, .certs { grid-template-columns: 1fr; }
    .form .row2 { grid-template-columns: 1fr; }
    .section { padding: 70px 0; }
}