/* Tomáš Dvořák — portfolio. Vercel-style: monochrome, hairline borders, Geist. */

:root {
  --font-sans: "Geist", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "Geist Mono", ui-monospace, "SF Mono", monospace;
  --radius: 8px;
  --nav-h: 64px;
  --max-w: 1024px;
}

[data-theme="dark"] {
  --bg: #000;
  --bg-raised: #0a0a0a;
  --fg: #ededed;
  --fg-dim: #a1a1a1;
  --fg-faint: #666;
  --border: #2e2e2e;
  --border-strong: #454545;
  --btn-primary-bg: #ededed;
  --btn-primary-fg: #000;
  --grid-line: rgba(255, 255, 255, 0.06);
  --accent: #3b82f6;
}

[data-theme="light"] {
  --bg: #fff;
  --bg-raised: #fafafa;
  --fg: #171717;
  --fg-dim: #666;
  --fg-faint: #999;
  --border: #eaeaea;
  --border-strong: #d4d4d4;
  --btn-primary-bg: #171717;
  --btn-primary-fg: #fff;
  --grid-line: rgba(0, 0, 0, 0.06);
  --accent: #0070f3;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; scroll-padding-top: calc(var(--nav-h) + 16px); }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background 0.2s, color 0.2s;
}

.mono { font-family: var(--font-mono); }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }

/* ============ Nav ============ */
.nav {
  position: sticky; top: 0; z-index: 50;
  height: var(--nav-h);
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg) 80%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.nav-inner {
  max-width: var(--max-w); height: 100%; margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; gap: 32px;
}
.nav-logo img { height: 20px; width: auto; }
[data-theme="dark"] .nav-logo img { filter: invert(1); }
.nav-links { display: flex; gap: 24px; flex: 1; }
.nav-links a { font-size: 14px; color: var(--fg-dim); transition: color 0.15s; }
.nav-links a:hover { color: var(--fg); }
.nav-actions { display: flex; align-items: center; gap: 12px; }
.theme-btn {
  display: grid; place-items: center;
  width: 32px; height: 32px;
  background: none; border: 1px solid var(--border); border-radius: var(--radius);
  color: var(--fg-dim); cursor: pointer; transition: color 0.15s, border-color 0.15s;
}
.theme-btn:hover { color: var(--fg); border-color: var(--border-strong); }
[data-theme="dark"] .icon-moon { display: none; }
[data-theme="light"] .icon-sun { display: none; }

/* ============ Buttons ============ */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 0 16px; height: 40px;
  font-family: var(--font-sans); font-size: 14px; font-weight: 500;
  color: var(--fg); background: var(--bg);
  border: 1px solid var(--border-strong); border-radius: var(--radius);
  cursor: pointer; transition: border-color 0.15s, background 0.15s;
}
.btn:hover { border-color: var(--fg-dim); background: var(--bg-raised); }
.btn .arrow { transition: transform 0.15s; }
.btn:hover .arrow { transform: translate(1px, -1px); }
.btn-sm { height: 32px; padding: 0 12px; font-size: 13px; }
.btn-primary { background: var(--btn-primary-bg); color: var(--btn-primary-fg); border-color: var(--btn-primary-bg); }
.btn-primary:hover { background: var(--btn-primary-bg); opacity: 0.88; border-color: var(--btn-primary-bg); }

/* ============ Hero ============ */
.hero { position: relative; padding: 128px 0 96px; overflow: hidden; }
.grid-bg {
  position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 30%, transparent 75%);
}
.hero .container { position: relative; }
.status-pill {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 12px; margin-bottom: 32px;
  font-size: 13px; color: var(--fg-dim);
  border: 1px solid var(--border); border-radius: 999px;
  background: var(--bg-raised);
}
.status-dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: #22c55e;
  box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.18);
}
.hero-title {
  font-size: clamp(44px, 8vw, 80px);
  font-weight: 700; letter-spacing: -0.04em; line-height: 1.05;
}
.hero-sub {
  margin-top: 16px;
  font-size: clamp(18px, 3vw, 24px); font-weight: 500;
  color: var(--fg-dim); letter-spacing: -0.02em;
}
.hero-desc { margin-top: 24px; max-width: 560px; color: var(--fg-dim); font-size: 16px; }
.hero-desc strong { color: var(--fg); font-weight: 500; }
.hero-cta { display: flex; gap: 12px; margin-top: 32px; flex-wrap: wrap; }
.hero-meta { margin-top: 40px; font-size: 13px; color: var(--fg-faint); }

/* ============ Sections ============ */
.section { padding: 80px 0; border-top: 1px solid var(--border); }
.label { font-size: 12px; color: var(--fg-faint); text-transform: uppercase; letter-spacing: 0.08em; }
.section-title { margin-top: 12px; font-size: 32px; font-weight: 600; letter-spacing: -0.03em; }
.section-desc { margin-top: 8px; color: var(--fg-dim); font-size: 15px; }
.inline-link { color: var(--fg); text-decoration: underline; text-underline-offset: 3px; text-decoration-color: var(--border-strong); }
.inline-link:hover { text-decoration-color: var(--fg); }

/* ============ Cards ============ */
.card-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px;
  margin-top: 40px;
}
.card {
  --glow: rgba(255, 255, 255, 0.35);
  position: relative;
  display: flex; flex-direction: column;
  border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--bg-raised); overflow: hidden;
  transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
}
.js .card { opacity: 0; transform: translateY(14px); }
[data-theme="light"] .card { --glow: rgba(0, 0, 0, 0.16); }
.card.in { opacity: 1; transform: none; transition: opacity 0.5s ease, transform 0.5s ease, border-color 0.2s, box-shadow 0.2s; }
.card:hover { border-color: var(--border-strong); transform: translateY(-3px); box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35); }
[data-theme="light"] .card:hover { box-shadow: 0 12px 32px rgba(0, 0, 0, 0.1); }
/* mouse-tracked border glow */
.card::before {
  content: ""; position: absolute; inset: 0; z-index: 2; pointer-events: none;
  border-radius: var(--radius); padding: 1px;
  background: radial-gradient(240px circle at var(--mx, 50%) var(--my, 50%), var(--glow), transparent 70%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
  opacity: 0; transition: opacity 0.3s;
}
/* soft inner spotlight */
.card::after {
  content: ""; position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background: radial-gradient(420px circle at var(--mx, 50%) var(--my, 50%), rgba(255, 255, 255, 0.05), transparent 70%);
  opacity: 0; transition: opacity 0.3s;
}
[data-theme="light"] .card::after { background: radial-gradient(420px circle at var(--mx, 50%) var(--my, 50%), rgba(0, 0, 0, 0.04), transparent 70%); }
.card:hover::before, .card:hover::after { opacity: 1; }
.card > * { position: relative; z-index: 1; }
.card figure { position: relative; aspect-ratio: 16/9; overflow: hidden; border-bottom: 1px solid var(--border); }
.card figure img {
  width: 100%; height: 100%; object-fit: cover; object-position: top;
  filter: saturate(0.9); transition: transform 0.5s ease, filter 0.5s ease;
}
.card:hover figure img { transform: scale(1.03); filter: saturate(1.05); }
/* ↗ badge over the image */
.card figure::after {
  content: "↗"; position: absolute; top: 10px; right: 10px;
  display: grid; place-items: center; width: 26px; height: 26px;
  font-family: var(--font-mono); font-size: 13px; color: var(--fg);
  background: color-mix(in srgb, var(--bg) 75%, transparent);
  border: 1px solid var(--border-strong); border-radius: 999px;
  backdrop-filter: blur(8px);
  opacity: 0; transform: translate(-6px, 6px);
  transition: opacity 0.2s, transform 0.2s;
}
.card:hover figure::after { opacity: 1; transform: none; }
.card-body { padding: 20px; }
.card-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.card-head h3 { font-size: 16px; font-weight: 600; letter-spacing: -0.01em; }
.tag {
  flex-shrink: 0;
  font-family: var(--font-mono); font-size: 11px; color: var(--fg-dim);
  padding: 3px 8px; border: 1px solid var(--border); border-radius: 999px;
}
/* brand accent tags — color sampled from each product's own UI */
.tag-lime { --acc: #a3e635; }            /* containr */
.tag-nothing { --acc: #f04e55; }         /* nothing red */
.tag-cal { --acc: #7da88b; }             /* sage */
.tag-pulse { --acc: #5eb3ff; }           /* monitor blue */
.tag-bookra { --acc: #d8b98a; }          /* warm tan */
.tag-vibly { --acc: #b8ff2e; }           /* chartreuse */
.tag-silver { --acc: #c9cdd3; }          /* timespent mono */
.tag-sportcreative { --acc: #9a7ae0; }   /* purple */
.tag-zeus { --acc: #e05a52; }            /* red */
.tag-reklik { --acc: #58aed8; }          /* blue */
.tag-bizoni { --acc: #c05b50; }          /* maroon */
.tag-primora { --acc: #e8853d; }         /* primora orange */
.tag-dash { --acc: #4ade80; }            /* dash green */
.tag[class*="tag-"] { color: var(--acc); border-color: color-mix(in srgb, var(--acc) 35%, transparent); }
[data-theme="light"] .tag[class*="tag-"] { color: color-mix(in srgb, var(--acc) 45%, #000); border-color: color-mix(in srgb, var(--acc) 50%, transparent); }
.card-body > p { margin-top: 8px; font-size: 14px; color: var(--fg-dim); line-height: 1.55; }

/* ============ Row lists ============ */
.row-list { margin-top: 40px; border-top: 1px solid var(--border); }
.row {
  display: flex; align-items: center; gap: 16px;
  padding: 16px 8px;
  border-bottom: 1px solid var(--border);
  transition: background 0.15s;
}
.row:not(.row-static):hover { background: var(--bg-raised); }
.row-main { flex: 1; min-width: 0; }
.row-main h4 { font-size: 15px; font-weight: 500; display: inline; }
.row-main p { font-size: 14px; color: var(--fg-dim); margin-top: 2px; }
.row-tag { font-size: 11px; color: var(--fg-faint); white-space: nowrap; }
.row .arrow { color: var(--fg-faint); flex-shrink: 0; transition: transform 0.15s, color 0.15s; }
.row:hover .arrow { transform: translate(1px, -1px); color: var(--fg); }
.row-static { cursor: default; }
.sub-label { margin-top: 48px; }
.row-list-tight { margin-top: 16px; }

/* ============ Timeline ============ */
.timeline { margin-top: 40px; list-style: none; }
.tl-item {
  display: grid; grid-template-columns: 180px 1fr; gap: 24px;
  padding: 24px 0; border-bottom: 1px solid var(--border);
}
.tl-item:first-child { padding-top: 0; }
.tl-when { font-size: 13px; color: var(--fg-faint); padding-top: 3px; }
.tl-body h4 { font-size: 16px; font-weight: 600; letter-spacing: -0.01em; }
.tl-meta { font-size: 13px; color: var(--fg-faint); margin-top: 2px; }
.tl-body > p:last-child { margin-top: 8px; font-size: 14px; color: var(--fg-dim); }

/* ============ Stack ============ */
.stack { margin-top: 64px; }
.stack-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px 24px;
  margin-top: 24px;
}
.stack-grid h5 { font-size: 12px; color: var(--fg-faint); text-transform: uppercase; letter-spacing: 0.08em; font-weight: 500; }
.stack-grid p { margin-top: 8px; font-size: 14px; color: var(--fg-dim); line-height: 1.7; }

.edu { margin-top: 64px; }

/* ============ About ============ */
.about-text {
  margin-top: 20px; max-width: 720px;
  font-size: clamp(18px, 2.5vw, 22px); line-height: 1.6;
  color: var(--fg-dim); letter-spacing: -0.01em;
}

/* ============ Contact ============ */
.contact-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 48px;
  margin-top: 40px;
}
.contact-info { border-top: 1px solid var(--border); }
.contact-row {
  display: flex; justify-content: space-between; align-items: baseline; gap: 16px;
  padding: 14px 0; border-bottom: 1px solid var(--border);
}
a.contact-row:hover .contact-val { color: var(--fg); }
.contact-key { font-size: 12px; color: var(--fg-faint); text-transform: uppercase; letter-spacing: 0.08em; }
.contact-val { font-size: 14px; color: var(--fg-dim); text-align: right; transition: color 0.15s; }

.contact-form { display: flex; flex-direction: column; gap: 16px; }
.field label { display: block; font-size: 12px; color: var(--fg-faint); text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 6px; }
.field input, .field textarea {
  width: 100%; padding: 10px 12px;
  font-family: var(--font-sans); font-size: 14px;
  color: var(--fg); background: var(--bg-raised);
  border: 1px solid var(--border); border-radius: var(--radius);
  transition: border-color 0.15s;
}
.field input:focus, .field textarea:focus { outline: none; border-color: var(--fg-dim); }
.field input::placeholder, .field textarea::placeholder { color: var(--fg-faint); }
.field textarea { resize: vertical; }
.contact-form .btn-primary { align-self: flex-start; }
.form-status { font-size: 13px; color: var(--fg-dim); min-height: 18px; }
.form-status.ok { color: #22c55e; }
.form-status.err { color: #ef4444; }

/* ============ Footer ============ */
.footer { border-top: 1px solid var(--border); padding: 32px 0; }
.footer-inner { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.footer p { font-size: 13px; color: var(--fg-faint); }

/* ============ Responsive ============ */
@media (max-width: 900px) {
  .card-grid { grid-template-columns: repeat(2, 1fr); }
  .stack-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
}
@media (max-width: 640px) {
  .nav-links { display: none; }
  .hero { padding: 88px 0 72px; }
  .card-grid { grid-template-columns: 1fr; }
  .tl-item { grid-template-columns: 1fr; gap: 6px; }
  .section { padding: 56px 0; }
  .stack-grid { grid-template-columns: 1fr; gap: 24px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}