/* =====================================================================
   Michal Štěpán · portfolio
   Plain CSS, no build step. Six backgrounds via :root[data-bg]; the
   base :root values are the "space" one, "meadow" is the default.
   ===================================================================== */

:root {
  --bg: #0b1020;
  --bg-2: #0f172b;
  --card: #141f36;
  --card-2: #1a2745;
  --text: #e8ecf5;
  --muted: #a3add0;
  --accent: #f1c55c;
  --accent-ink: #1a1408;
  --accent-2: #8fb4ff;
  --line: rgba(255, 255, 255, 0.10);
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  --radius: 14px;
  --font-display: "Lora", Georgia, "Times New Roman", serif;
  --font-body: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --nav-h: 64px;
  color-scheme: dark;
}

/* :root[data-bg], not [data-bg]: the picker's menu items carry data-bg too */
:root[data-bg="meadow"] {
  --bg: #f2f8ea;
  --bg-2: #fbfdf7;
  --card: #ffffff;
  --card-2: #e8f3dc;
  --text: #1d3324;
  --muted: #4e6a55;
  --accent: #276e2b;
  --accent-ink: #ffffff;
  --accent-2: #1b64a0;
  --line: rgba(29, 51, 36, 0.13);
  --shadow: 0 10px 30px rgba(29, 51, 36, 0.10);
  --hero-bg: linear-gradient(180deg, #dcefff 0%, #ebf6f1 58%, #e3f2d4 100%);
  --scene-opacity: 1;
  color-scheme: light;
}

:root[data-bg="forest"] {
  --bg: #0e1712;
  --bg-2: #111d16;
  --card: #15241b;
  --card-2: #1b2e22;
  --text: #e4eee5;
  --muted: #a3b9a8;
  --accent: #a5d46f;
  --accent-ink: #10200f;
  --accent-2: #e8c872;
  --line: rgba(255, 255, 255, 0.09);
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.40);
  --hero-bg: radial-gradient(900px 420px at 82% 8%, rgba(220, 232, 190, 0.07), transparent 70%), linear-gradient(180deg, #0b140f, #0f1a13);
  --scene-opacity: 0.95;
  color-scheme: dark;
}

:root[data-bg="sea"] {
  --bg: #eef6f6;
  --bg-2: #f8fcfc;
  --card: #ffffff;
  --card-2: #e1efef;
  --text: #13303a;
  --muted: #4a6670;
  --accent: #0f7478;
  --accent-ink: #ffffff;
  --accent-2: #2458a6;
  --line: rgba(19, 48, 58, 0.12);
  --shadow: 0 10px 30px rgba(19, 48, 58, 0.10);
  --hero-bg: linear-gradient(180deg, #e0effb 0%, #edf7f7 65%, #e4f2f2 100%);
  --scene-opacity: 1;
  color-scheme: light;
}

:root[data-bg="nebula"] {
  --bg: #110c22;
  --bg-2: #150f2b;
  --card: #1b1436;
  --card-2: #241a47;
  --text: #ece8fb;
  --muted: #b3aad8;
  --accent: #7fe3f0;
  --accent-ink: #081620;
  --accent-2: #d4a6ff;
  --line: rgba(255, 255, 255, 0.10);
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.45);
  --hero-bg: radial-gradient(700px 420px at 85% 12%, rgba(150, 80, 240, 0.30), transparent 70%), radial-gradient(640px 420px at 8% 95%, rgba(40, 190, 210, 0.14), transparent 70%);
  --scene-opacity: 0.85;
  color-scheme: dark;
}

:root[data-bg="paper"] {
  --bg: #f7f5ef;
  --bg-2: #ffffff;
  --card: #ffffff;
  --card-2: #f1eee4;
  --text: #14213d;
  --muted: #4d5b7c;
  --accent: #8a6208;
  --accent-ink: #ffffff;
  --accent-2: #2b5cc7;
  --line: rgba(20, 33, 61, 0.12);
  --shadow: 0 10px 30px rgba(20, 33, 61, 0.10);
  color-scheme: light;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--nav-h) + 12px); }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: var(--accent-2); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 600; line-height: 1.15; margin: 0; }
p { margin: 0 0 1em; }
ul { margin: 0; padding-left: 1.2em; }

.container { width: min(1100px, 100% - 2.5rem); margin-inline: auto; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--accent); color: var(--accent-ink); padding: 8px 12px; border-radius: 8px; z-index: 100; }
.skip:focus { left: 8px; }
.hidden, [hidden] { display: none !important; }

/* ---------- header / nav ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav { height: var(--nav-h); display: flex; align-items: center; gap: 1rem; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); font-family: var(--font-display); font-weight: 700; font-size: 1.05rem; }
.brand:hover { text-decoration: none; }
.brand .mark { flex: none; width: 34px; height: 34px; border-radius: 9px; background: var(--accent); color: var(--accent-ink); display: grid; place-items: center; font-size: 0.85rem; font-weight: 700; letter-spacing: 0.02em; }
.ver-btn {
  margin-left: -0.4rem; border: 1px solid var(--line); background: transparent; color: var(--muted);
  border-radius: 999px; cursor: pointer; font: inherit; font-size: 0.75rem; font-variant-numeric: tabular-nums;
  padding: 2px 9px; line-height: 1.5; white-space: nowrap;
}
.ver-btn:hover { color: var(--text); border-color: var(--accent); }
.nav-links { display: flex; gap: 2px; margin-left: auto; list-style: none; padding: 0; }
.nav-links a { color: var(--muted); padding: 8px 10px; border-radius: 8px; font-size: 0.93rem; }
.nav-links a:hover { color: var(--text); background: var(--card); text-decoration: none; }
.nav-ctrls { display: flex; gap: 6px; align-items: center; }
.icon-btn, .pill-btn {
  border: 1px solid var(--line); background: var(--card); color: var(--text);
  border-radius: 999px; cursor: pointer; font: inherit; font-size: 0.85rem;
  display: inline-flex; align-items: center; gap: 6px; padding: 6px 12px; height: 36px;
}
.icon-btn { width: 36px; padding: 0; justify-content: center; }
.icon-btn:hover, .pill-btn:hover { border-color: var(--accent); }
.icon-btn svg { width: 18px; height: 18px; }
.menu-btn { display: none; }

.bg-picker { position: relative; }
.bg-menu {
  position: absolute; right: 0; top: calc(100% + 8px); z-index: 60; min-width: 210px;
  display: grid; gap: 2px; padding: 6px;
  background: var(--bg-2); border: 1px solid var(--line); border-radius: 12px; box-shadow: var(--shadow);
}
.bg-menu-title { color: var(--muted); font-size: 0.75rem; font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase; padding: 6px 10px 4px; }
.bg-menu button {
  display: flex; align-items: center; gap: 10px; width: 100%; padding: 8px 10px;
  border: 0; border-radius: 8px; background: transparent; color: var(--text);
  font: inherit; font-size: 0.92rem; text-align: left; cursor: pointer;
}
.bg-menu button:hover { background: var(--card-2); }
.bg-menu button:focus-visible { background: var(--card-2); outline: 2px solid var(--accent); outline-offset: -2px; }
.bg-menu button[aria-checked="true"]::after { content: "✓"; margin-left: auto; color: var(--accent); font-weight: 700; }
.bg-menu .sw { flex: none; width: 22px; height: 22px; border-radius: 50%; border: 1px solid var(--line); }
.bg-menu [data-bg="meadow"] .sw { background: radial-gradient(circle at 70% 30%, #ffcf4d 0 3px, transparent 4px), linear-gradient(180deg, #cfe8fb 0 52%, #6fbd4a 52%); }
.bg-menu [data-bg="forest"] .sw { background: radial-gradient(circle at 35% 40%, #ffd66e 0 1.5px, transparent 2.5px), radial-gradient(circle at 65% 30%, #ffd66e 0 1.5px, transparent 2.5px), linear-gradient(180deg, #0e1712 0 58%, #2a4c31 58%); }
.bg-menu [data-bg="sea"] .sw { background: linear-gradient(180deg, #dcedfb 0 50%, #5fb3b3 50% 72%, #1f8088 72%); }
.bg-menu [data-bg="space"] .sw { background: radial-gradient(circle at 65% 35%, #f1c55c 0 3px, transparent 4px), #0b1020; }
.bg-menu [data-bg="nebula"] .sw { background: radial-gradient(circle at 68% 32%, #7fe3f0 0 2.5px, transparent 3.5px), radial-gradient(circle at 30% 70%, #9a5cf0, #110c22 75%); }
.bg-menu [data-bg="paper"] .sw { background: radial-gradient(circle at 65% 35%, #8a6208 0 3px, transparent 4px), #f7f5ef; }

@media (max-width: 860px) {
  .menu-btn { display: inline-flex; }
  .nav-ctrls { margin-left: auto; }
  .nav-links {
    position: absolute; top: var(--nav-h); left: 0; right: 0;
    flex-direction: column; background: var(--bg-2); border-bottom: 1px solid var(--line);
    padding: 8px 1rem 12px; display: none;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 10px 12px; font-size: 1rem; }
}
@media (max-width: 480px) { .brand-name { display: none; } }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 18px; border-radius: 10px; font-weight: 600; font-size: 0.95rem;
  border: 1px solid var(--line); background: var(--card); color: var(--text); cursor: pointer; font-family: inherit;
  transition: transform 0.12s ease, border-color 0.12s ease, background 0.12s ease;
}
.btn:hover { text-decoration: none; border-color: var(--accent); transform: translateY(-1px); }
.btn.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.btn.primary:hover { filter: brightness(1.05); }
.btn.small { padding: 7px 12px; font-size: 0.85rem; border-radius: 8px; }
.btn svg { width: 18px; height: 18px; }
.btn:disabled { opacity: 0.55; cursor: not-allowed; transform: none; }

/* ---------- sections ---------- */
section { padding: clamp(3.5rem, 8vw, 6rem) 0; }
section + section { border-top: 1px solid var(--line); }
.section-head { max-width: 720px; margin-bottom: 2.2rem; }
.kicker { color: var(--accent); font-size: 0.8rem; letter-spacing: 0.14em; text-transform: uppercase; font-weight: 600; margin-bottom: 0.6rem; }
h2 { font-size: clamp(1.8rem, 3.2vw, 2.4rem); margin-bottom: 0.6rem; }
.lead { color: var(--muted); font-size: 1.05rem; margin: 0; }

/* ---------- hero ---------- */
.hero { position: relative; overflow: hidden; padding: clamp(4rem, 10vw, 7.5rem) 0; border-bottom: 1px solid var(--line); background: var(--hero-bg, none); }
.hero canvas { position: absolute; inset: 0; width: 100%; height: 100%; opacity: var(--scene-opacity, 0.7); pointer-events: none; }
.hero .container { position: relative; }
.scene-hint {
  position: absolute; right: 1.25rem; bottom: 0.9rem; z-index: 1; pointer-events: none;
  padding: 4px 12px; border-radius: 999px; font-size: 0.8rem; color: var(--text);
  background: color-mix(in srgb, var(--bg) 72%, transparent); border: 1px solid var(--line);
  backdrop-filter: blur(4px); -webkit-backdrop-filter: blur(4px);
}
.scene-hint::before { content: "✦ "; color: var(--accent); }
@media (prefers-reduced-motion: reduce) { .scene-hint { display: none; } } /* the scene is a still frame then */
.hero-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 2rem; align-items: center; }
.hero h1 { font-size: clamp(2.5rem, 6vw, 4.3rem); font-weight: 700; letter-spacing: -0.01em; margin: 0.3rem 0 1rem; }
.hero h1 .accent { color: var(--accent); }
.hero .tagline { font-size: clamp(1.05rem, 1.8vw, 1.3rem); color: var(--muted); max-width: 40ch; margin-bottom: 1.8rem; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 1.4rem; }
.hero-studio { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin: -0.4rem 0 1.4rem; }
.hero-studio .lbl { color: var(--muted); font-size: 0.9rem; margin-right: 4px; }
.hero-studio .btn svg { width: 16px; height: 16px; }
.hero-meta { display: flex; flex-wrap: wrap; gap: 1.2rem; color: var(--muted); font-size: 0.92rem; }
.hero-meta span { display: inline-flex; align-items: center; gap: 6px; }
.hero-meta svg { width: 16px; height: 16px; opacity: 0.8; }
.now-card {
  background: color-mix(in srgb, var(--card) 80%, transparent); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.2rem 1.4rem; box-shadow: var(--shadow); justify-self: end; width: min(100%, 360px);
}
.now-card .label { color: var(--accent); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.12em; font-weight: 600; }
.now-card .big { font-family: var(--font-display); font-size: 1.25rem; margin: 0.35rem 0 0.8rem; }
.now-card ul { list-style: none; padding: 0; color: var(--muted); font-size: 0.92rem; display: grid; gap: 4px; }
.now-card li::before { content: "▸ "; color: var(--accent); }
@media (max-width: 860px) {
  .hero-grid { grid-template-columns: 1fr; }
  .now-card { justify-self: start; }
}

/* ---------- about ---------- */
.about-grid { display: grid; grid-template-columns: 1.6fr 1fr; gap: 3rem; align-items: start; }
.about-grid p { font-size: 1.05rem; }
.facts { display: grid; gap: 10px; }
.fact { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 0.9rem 1.1rem; }
.fact b { display: block; font-family: var(--font-display); font-size: 1.15rem; }
.fact span { color: var(--muted); font-size: 0.9rem; }
@media (max-width: 860px) { .about-grid { grid-template-columns: 1fr; gap: 1.5rem; } .facts { grid-template-columns: 1fr 1fr; } }
@media (max-width: 520px) { .facts { grid-template-columns: 1fr; } }

/* ---------- skills ---------- */
.skill-groups { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1rem; }
.skill-group { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.2rem 1.3rem; }
.skill-group h3 { font-size: 1.05rem; margin-bottom: 0.8rem; color: var(--accent); }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip { background: var(--card-2); border: 1px solid var(--line); border-radius: 999px; padding: 4px 11px; font-size: 0.85rem; color: var(--text); }
.chip.soft { background: transparent; color: var(--muted); }

/* ---------- experience timeline ---------- */
.timeline { position: relative; display: grid; gap: 1.2rem; padding-left: 28px; }
.timeline::before { content: ""; position: absolute; left: 8px; top: 8px; bottom: 8px; width: 2px; background: var(--line); }
.job { position: relative; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.2rem 1.4rem; }
.job::before { content: ""; position: absolute; left: -26px; top: 1.45rem; width: 12px; height: 12px; border-radius: 50%; background: var(--bg); border: 3px solid var(--accent); }
.job.current::before { background: var(--accent); box-shadow: 0 0 0 5px color-mix(in srgb, var(--accent) 25%, transparent); }
.job-head { display: flex; flex-wrap: wrap; gap: 0.4rem 1rem; align-items: baseline; margin-bottom: 0.3rem; }
.job-head h3 { font-size: 1.2rem; }
.job-head .company { color: var(--accent-2); font-weight: 600; }
.job-head .period { margin-left: auto; color: var(--muted); font-size: 0.9rem; white-space: nowrap; }
.job .note { color: var(--muted); font-size: 0.92rem; margin-bottom: 0.6rem; }
.job ul { color: var(--text); display: grid; gap: 4px; margin: 0.4rem 0 0.8rem; font-size: 0.97rem; }
.job .stack { color: var(--muted); font-size: 0.85rem; }
.job .stack b { color: var(--accent); font-weight: 600; margin-right: 6px; }

/* ---------- gravity ---------- */
.gravity-intro { font-size: 1.07rem; max-width: 62ch; }
.gravity-intro .free { color: var(--muted); font-size: 0.95rem; }
.app-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 1.1rem; margin-top: 2rem; }
.app-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; display: flex; flex-direction: column; }
.app-card .thumb { aspect-ratio: 2 / 1; object-fit: cover; width: 100%; }
.app-card .body { padding: 1rem 1.2rem 1.2rem; display: flex; flex-direction: column; gap: 0.6rem; flex: 1; }
.app-card .title { display: flex; align-items: center; gap: 10px; }
.app-card .title img { width: 36px; height: 36px; border-radius: 9px; }
.app-card .title h3 { font-size: 1.15rem; }
.app-card .title small { display: block; color: var(--muted); font-size: 0.82rem; font-family: var(--font-body); }
.app-card p { font-size: 0.95rem; color: var(--text); margin: 0; flex: 1; }
.app-card .links { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 0.4rem; }
.badge.soon { display: inline-flex; align-items: center; padding: 6px 12px; font-size: 0.85rem; border: 1px dashed var(--line); border-radius: 8px; color: var(--muted); }

.subhead { font-size: 1.25rem; margin: 2.6rem 0 1rem; }
.strip { display: flex; gap: 12px; overflow-x: auto; padding-bottom: 10px; scroll-snap-type: x mandatory; -webkit-overflow-scrolling: touch; }
.strip figure { margin: 0; flex: 0 0 min(420px, 78vw); scroll-snap-align: start; }
.strip img { border-radius: 10px; border: 1px solid var(--line); cursor: zoom-in; aspect-ratio: 20 / 9; object-fit: cover; }
.strip figcaption { color: var(--muted); font-size: 0.85rem; margin-top: 6px; }
.video-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 1rem; }
.yt { position: relative; aspect-ratio: 16 / 9; border-radius: 12px; overflow: hidden; background: #000 center / cover no-repeat; cursor: pointer; border: 1px solid var(--line); }
.yt iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.yt .play { position: absolute; inset: 0; display: grid; place-items: center; background: linear-gradient(to top, rgba(0,0,0,0.55), rgba(0,0,0,0) 60%); }
.yt .play span { width: 68px; height: 48px; border-radius: 12px; background: var(--accent); display: grid; place-items: center; }
.yt .play svg { width: 26px; height: 26px; fill: var(--accent-ink); margin-left: 3px; }
.yt .cap { position: absolute; left: 12px; right: 12px; bottom: 10px; color: #fff; font-size: 0.9rem; text-shadow: 0 1px 3px rgba(0,0,0,0.8); }

/* ---------- projects ---------- */
.project-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 1.1rem; }
.project { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; display: flex; flex-direction: column; }
.project img.cover { aspect-ratio: 16 / 8; object-fit: cover; width: 100%; }
.project .body { padding: 1.1rem 1.2rem 1.2rem; display: flex; flex-direction: column; gap: 0.6rem; flex: 1; }
.project h3 { font-size: 1.25rem; }
.project h3 small { display: block; color: var(--muted); font-size: 0.85rem; font-family: var(--font-body); font-weight: 400; margin-top: 2px; }
.project p { font-size: 0.95rem; margin: 0; flex: 1; }
.project .links { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 0.3rem; }

/* ---------- rag ---------- */
.rag-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1rem; }
.rag-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.3rem 1.4rem; position: relative; }
.rag-card h3 { font-size: 1.1rem; margin: 0 0 0.6rem; }
.rag-card p { font-size: 0.95rem; color: var(--text); margin: 0; }
.rag-card a.more { display: inline-block; margin-top: 0.6rem; font-size: 0.9rem; }

/* ---------- chat ---------- */
.chat-wrap { display: grid; grid-template-columns: 1fr 1.6fr; gap: 1.5rem; align-items: start; }
@media (max-width: 900px) { .chat-wrap { grid-template-columns: 1fr; } }
.chat-side { display: grid; gap: 1rem; }
.chat-side .privacy { display: inline-flex; align-items: center; gap: 8px; color: var(--muted); font-size: 0.85rem; }
.chat-side .privacy svg { width: 16px; height: 16px; color: var(--accent); }
.field { display: grid; gap: 6px; }
.field label { font-size: 0.85rem; color: var(--muted); }
select {
  font: inherit; font-size: 0.95rem; color: var(--text); background: var(--card); border: 1px solid var(--line);
  border-radius: 10px; padding: 10px 12px; width: 100%;
}
.progress { height: 8px; background: var(--card-2); border-radius: 999px; overflow: hidden; border: 1px solid var(--line); }
.progress > div { height: 100%; width: 0%; background: var(--accent); transition: width 0.2s ease; }
.status { font-size: 0.88rem; color: var(--muted); min-height: 1.4em; }
.suggest { display: flex; flex-wrap: wrap; gap: 6px; }
.suggest button { font: inherit; font-size: 0.83rem; background: transparent; color: var(--text); border: 1px solid var(--line); border-radius: 999px; padding: 5px 11px; cursor: pointer; }
.suggest button:hover { border-color: var(--accent); }

.chat-box { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); display: flex; flex-direction: column; min-height: 460px; box-shadow: var(--shadow); }
.messages { flex: 1; padding: 1rem; overflow-y: auto; display: flex; flex-direction: column; gap: 10px; max-height: 60vh; }
.msg { max-width: 85%; padding: 10px 14px; border-radius: 14px; font-size: 0.95rem; white-space: pre-wrap; word-wrap: break-word; }
.msg.user { align-self: flex-end; background: var(--accent); color: var(--accent-ink); border-bottom-right-radius: 4px; }
.msg.bot { align-self: flex-start; background: var(--card-2); border-bottom-left-radius: 4px; }
.msg.sys { align-self: center; color: var(--muted); font-size: 0.85rem; background: transparent; text-align: center; }
.msg.bot.pending::after { content: "▍"; animation: blink 1s steps(2) infinite; color: var(--accent); }
@keyframes blink { to { opacity: 0; } }
.chat-input { display: flex; gap: 8px; padding: 10px; border-top: 1px solid var(--line); }
.chat-input input { flex: 1; font: inherit; color: var(--text); background: var(--bg-2); border: 1px solid var(--line); border-radius: 10px; padding: 11px 12px; min-width: 0; }
.chat-input input:focus { outline: 2px solid color-mix(in srgb, var(--accent) 50%, transparent); border-color: var(--accent); }
.chat-input input:disabled { opacity: 0.6; }

/* ---------- education ---------- */
.edu-grid { display: grid; grid-template-columns: 1.5fr 1fr; gap: 1.2rem; }
@media (max-width: 860px) { .edu-grid { grid-template-columns: 1fr; } }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.3rem 1.4rem; }
.card h3 { font-size: 1.05rem; color: var(--accent); margin-bottom: 0.9rem; }
.degree + .degree { border-top: 1px solid var(--line); margin-top: 0.9rem; padding-top: 0.9rem; }
.degree .school { font-weight: 600; }
.degree .faculty, .degree .thesis { color: var(--muted); font-size: 0.9rem; }
.degree .degree-name { margin-top: 2px; }
.degree .year { float: right; color: var(--muted); font-size: 0.9rem; margin-left: 1rem; }
.cert { display: grid; gap: 2px; }
.cert + .cert { margin-top: 0.7rem; }
.cert b { font-weight: 600; }
.cert span { color: var(--muted); font-size: 0.9rem; }
.langs { display: grid; gap: 6px; margin-top: 0.2rem; }
.langs div { display: flex; justify-content: space-between; border-bottom: 1px dashed var(--line); padding-bottom: 4px; }
.langs span { color: var(--muted); }
.side-stack { display: grid; gap: 1.2rem; }

/* ---------- contact ---------- */
.contact-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1rem; }
.contact-item { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.1rem 1.2rem; display: flex; gap: 12px; align-items: flex-start; }
.contact-item:hover { border-color: var(--accent); text-decoration: none; }
.contact-item svg { width: 22px; height: 22px; color: var(--accent); flex: none; margin-top: 2px; }
.contact-item .k { font-size: 0.8rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.08em; }
.contact-item .v { color: var(--text); font-weight: 600; font-size: 0.95rem; overflow-wrap: anywhere; }

/* ---------- footer ---------- */
footer { border-top: 1px solid var(--line); padding: 2rem 0 2.5rem; color: var(--muted); font-size: 0.88rem; }
footer .container { display: flex; flex-wrap: wrap; gap: 0.5rem 1.5rem; justify-content: space-between; }

/* ---------- changelog ---------- */
dialog.changelog {
  border: 1px solid var(--line); border-radius: var(--radius); padding: 0; background: var(--bg-2); color: var(--text);
  width: min(560px, 100% - 2rem); max-height: min(80vh, 720px); box-shadow: var(--shadow);
}
dialog.changelog[open] { display: flex; flex-direction: column; }
dialog.changelog::backdrop { background: rgba(0, 0, 0, 0.6); }
.changelog-head { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: 1rem 1.2rem 0.8rem; border-bottom: 1px solid var(--line); }
.changelog-head h2 { font-size: 1.35rem; margin: 0; }
.changelog-head .icon-btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.changelog-list { overflow-y: auto; padding: 0.4rem 1.2rem 1.2rem; }
.release { padding: 0.9rem 0; }
.release + .release { border-top: 1px solid var(--line); }
.release-head { display: flex; align-items: baseline; gap: 0.8rem; margin-bottom: 0.4rem; }
.release-head b { font-family: var(--font-display); font-size: 1.05rem; color: var(--accent); }
.release-head time { color: var(--muted); font-size: 0.85rem; }
.release ul { display: grid; gap: 4px; font-size: 0.93rem; }

/* ---------- lightbox ---------- */
dialog.lightbox { border: 0; padding: 0; background: transparent; max-width: min(96vw, 1400px); max-height: 96vh; }
dialog.lightbox::backdrop { background: rgba(0, 0, 0, 0.85); }
dialog.lightbox img { max-height: 90vh; width: auto; max-width: 96vw; border-radius: 10px; margin: auto; }
dialog.lightbox figcaption { color: #fff; text-align: center; margin-top: 8px; font-size: 0.95rem; }
dialog.lightbox figure { margin: 0; }