/* ==========================================================================
   toncer.cz – styly
   Pořadí: fonty → proměnné → základ → layout → komponenty → sekce → pohyb → tisk
   ========================================================================== */

/* ---------- Fonty (self-hosted, IBM Plex, licence OFL) ---------- */
@font-face {
  font-family: "Plex Sans";
  src: url("/assets/fonts/ibm-plex-sans-var.woff2") format("woff2");
  font-weight: 400 700;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Plex Mono";
  src: url("/assets/fonts/ibm-plex-mono-regular.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Plex Mono";
  src: url("/assets/fonts/ibm-plex-mono-medium.woff2") format("woff2");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

/* ---------- Proměnné ---------- */
:root {
  color-scheme: light dark;

  --bg: #f6f4ef;
  --bg-alt: #efece5;
  --surface: #ffffff;
  --text: #15191f;
  --muted: #555b63;
  --line: #e2ddd3;
  --accent: #b93d0b;
  --accent-hover: #9a3412;
  --accent-soft: #fbe7dc;
  --on-accent: #ffffff;

  --invert-bg: #15191f;
  --invert-text: #f3f1ec;
  --invert-muted: #b4b8be;
  --invert-line: #2c3138;
  --invert-accent: #ff8a4c;

  --grid-line: rgba(21, 25, 31, 0.07);
  --shadow: 0 1px 2px rgba(21, 25, 31, 0.04), 0 12px 32px -16px rgba(21, 25, 31, 0.18);

  --font-sans: "Plex Sans", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  --font-mono: "Plex Mono", ui-monospace, "Cascadia Mono", Consolas, monospace;

  --radius: 16px;
  --radius-lg: 24px;
  --container: 72rem;
  --gutter: 16px;
  --header-h: 4rem;
}

@media (min-width: 768px) {
  :root {
    --gutter: 32px;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121417;
    --bg-alt: #16191d;
    --surface: #1a1d21;
    --text: #e9e7e2;
    --muted: #a3a7ad;
    --line: #2a2e34;
    --accent: #ff8a4c;
    --accent-hover: #ffa672;
    --accent-soft: rgba(255, 138, 76, 0.13);
    --on-accent: #121417;

    --invert-bg: #1c2025;
    --invert-text: #f3f1ec;
    --invert-muted: #a9adb3;
    --invert-line: #343941;
    --invert-accent: #ff8a4c;

    --grid-line: rgba(233, 231, 226, 0.05);
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 12px 32px -16px rgba(0, 0, 0, 0.6);
  }
}

/* ---------- Základ ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-padding-top: calc(var(--header-h) + 1rem);
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.6;
  font-kerning: normal;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

@media (min-width: 768px) {
  body {
    font-size: 1.125rem;
  }
}

img,
svg {
  display: block;
  max-width: 100%;
}

img {
  height: auto;
}

h1,
h2,
h3 {
  margin: 0;
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

p,
dl,
dd {
  margin: 0;
}

p {
  text-wrap: pretty;
}

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

a {
  color: inherit;
}

strong {
  font-weight: 600;
}

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

main:focus {
  outline: none;
}

::selection {
  background: var(--accent);
  color: var(--on-accent);
}

.nowrap {
  white-space: nowrap;
}

.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;
}

/* ---------- Layout ---------- */
.container {
  width: 100%;
  max-width: calc(var(--container) + 2 * var(--gutter));
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.skip-link {
  position: absolute;
  top: -100px;
  left: var(--gutter);
  z-index: 100;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  background: var(--accent);
  color: var(--on-accent);
  font-weight: 600;
  text-decoration: none;
}

.skip-link:focus {
  top: 0.75rem;
}

/* ---------- Tlačítka ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 3rem;
  padding: 0.75rem 1.375rem;
  border: 1.5px solid transparent;
  border-radius: 10px;
  font: inherit;
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.2;
  text-decoration: none;
  transition: background-color 0.15s, border-color 0.15s, color 0.15s;
}

.btn svg {
  width: 1.125rem;
  height: 1.125rem;
  flex: none;
}

.btn-primary {
  background: var(--accent);
  color: var(--on-accent);
}

.btn-primary:hover {
  background: var(--accent-hover);
}

.btn-ghost {
  border-color: var(--line);
  color: var(--text);
}

.btn-ghost:hover {
  border-color: var(--text);
}

.btn-sm {
  min-height: 2.5rem;
  padding: 0.5rem 1rem;
  font-size: 0.9375rem;
}

/* ---------- Hlavička ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid transparent;
  background: var(--bg);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  -webkit-backdrop-filter: saturate(1.4) blur(12px);
  backdrop-filter: saturate(1.4) blur(12px);
  transition: border-color 0.2s;
}

.site-header.is-scrolled {
  border-bottom-color: var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  height: var(--header-h);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  margin-right: auto;
  font-weight: 600;
  letter-spacing: -0.01em;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 9px;
  background: var(--accent);
  color: var(--on-accent);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.02em;
}

@media (max-width: 399px) {
  .brand-name {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
  }
}

.site-nav {
  display: none;
}

@media (min-width: 900px) {
  .site-nav {
    display: block;
  }
}

.site-nav ul {
  display: flex;
  gap: 1.75rem;
}

.site-nav a {
  position: relative;
  display: block;
  padding-block: 0.5rem;
  color: var(--muted);
  font-size: 0.9375rem;
  text-decoration: none;
  transition: color 0.15s;
}

.site-nav a:hover,
.site-nav a[aria-current="true"] {
  color: var(--text);
}

.site-nav a[aria-current="true"]::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 2px;
  background: var(--accent);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.625rem;
}

.lang-switch {
  display: inline-grid;
  place-items: center;
  min-width: 2.5rem;
  min-height: 2.5rem;
  padding-inline: 0.5rem;
  border: 1px solid var(--line);
  border-radius: 9px;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 500;
  text-decoration: none;
  transition: color 0.15s, border-color 0.15s;
}

.lang-switch:hover {
  border-color: var(--text);
  color: var(--text);
}

/* ---------- Štítky a nadpisy sekcí ---------- */
.eyebrow,
.section-label {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  line-height: 1.4;
  text-transform: uppercase;
}

.eyebrow::before,
.section-label::before {
  content: "";
  flex: none;
  width: 1.5rem;
  height: 1.5px;
  background: currentColor;
}

.section {
  padding-block: clamp(4.5rem, 10vw, 7.5rem);
}

.section-alt {
  border-block: 1px solid var(--line);
  background: var(--bg-alt);
}

.section-head {
  display: grid;
  gap: 1rem;
  max-width: 44rem;
  margin-bottom: clamp(2.5rem, 5vw, 3.5rem);
}

.section-title {
  font-size: clamp(2rem, 4.6vw, 3rem);
  letter-spacing: -0.03em;
}

.section-intro {
  color: var(--muted);
  font-size: 1.125rem;
}

/* ---------- Karta ---------- */
.card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  padding: clamp(1.5rem, 3vw, 2.25rem);
}

.card h3 {
  font-size: 1.375rem;
  letter-spacing: -0.015em;
}

.card-lead {
  margin-top: 0.75rem;
  color: var(--muted);
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding-block: clamp(2.5rem, 7vw, 5.5rem) clamp(4.5rem, 9vw, 7rem);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 48px 48px;
  -webkit-mask-image: radial-gradient(ellipse 80% 70% at 75% 35%, #000 25%, transparent 75%);
  mask-image: radial-gradient(ellipse 80% 70% at 75% 35%, #000 25%, transparent 75%);
  pointer-events: none;
}

.hero-grid {
  display: grid;
  gap: 3.5rem;
  align-items: center;
}

@media (min-width: 960px) {
  .hero-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 4rem;
  }
}

.hero-title {
  margin-top: 1.5rem;
}

.hero-name {
  display: block;
  margin-bottom: 0.875rem;
  color: var(--muted);
  font-size: clamp(1.125rem, 2vw, 1.375rem);
  font-weight: 500;
  letter-spacing: -0.01em;
}

.hero-claim {
  display: block;
  font-size: clamp(2.375rem, 6.4vw, 4.375rem);
  font-weight: 600;
  line-height: 1.04;
  letter-spacing: -0.035em;
}

.hero-claim em {
  color: var(--accent);
  font-style: normal;
}

.hero-lead {
  max-width: 38rem;
  margin-top: 1.5rem;
  color: var(--muted);
  font-size: clamp(1.0625rem, 1.6vw, 1.25rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2.25rem;
}

.hero-media {
  position: relative;
  isolation: isolate;
  width: 100%;
  max-width: 22rem;
  margin-inline: auto;
}

@media (min-width: 960px) {
  .hero-media {
    max-width: 27.5rem;
    margin-inline: auto 0;
  }
}

.hero-media::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  border: 2px solid var(--accent);
  border-radius: var(--radius-lg);
  transform: translate(14px, 14px);
}

.hero-photo img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border-radius: var(--radius-lg);
  background: var(--bg-alt);
}

.hero-tag {
  position: absolute;
  bottom: 1.5rem;
  left: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  max-width: calc(100% - 1.5rem);
  padding: 0.75rem 1rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
  box-shadow: var(--shadow);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  line-height: 1.45;
}

@media (min-width: 960px) {
  .hero-tag {
    left: -1.75rem;
  }
}

.hero-tag span {
  display: block;
}

.status-dot {
  flex: none;
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
}

/* ---------- Služby ---------- */
.services {
  display: grid;
  gap: 1.25rem;
}

@media (min-width: 720px) {
  .services {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.service-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}

.icon-box {
  display: grid;
  place-items: center;
  flex: none;
  width: 3rem;
  height: 3rem;
  border-radius: 12px;
  background: var(--accent-soft);
  color: var(--accent);
}

.icon-box svg {
  width: 1.5rem;
  height: 1.5rem;
}

.card-num {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
}

.ticks {
  display: grid;
  gap: 0.5rem;
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
}

.ticks li {
  position: relative;
  padding-left: 1.25rem;
  font-size: 1rem;
}

.ticks li::before {
  content: "";
  position: absolute;
  top: calc(0.8em - 1px);
  left: 0;
  width: 0.5rem;
  height: 2px;
  background: var(--accent);
}

/* ---------- Výsledky (případové studie) ---------- */
.cases {
  display: grid;
  gap: 1.25rem;
}

@media (min-width: 900px) {
  .cases {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.case-head {
  display: flex;
  align-items: baseline;
  gap: 0.875rem;
}

.case h3 {
  font-size: 1.25rem;
}

.steps {
  display: grid;
  gap: 1.25rem;
  margin-top: 1.5rem;
}

.steps > div {
  position: relative;
  padding-left: 1.75rem;
}

.steps > div::before {
  content: "";
  position: absolute;
  top: 0.3rem;
  left: 0;
  width: 0.75rem;
  height: 0.75rem;
  border: 2px solid var(--line);
  border-radius: 50%;
  background: var(--surface);
}

.steps > div:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 1.2rem;
  bottom: -1.4rem;
  left: calc(0.375rem - 1px);
  width: 2px;
  background: var(--line);
}

.steps dt {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.steps dd {
  margin-top: 0.25rem;
  font-size: 1rem;
}

.steps .step-start dd {
  color: var(--muted);
}

.steps .step-result::before {
  border-color: var(--accent);
  background: var(--accent);
}

.steps .step-result dt {
  color: var(--accent);
}

.steps .step-result dd {
  font-weight: 500;
}

/* ---------- Spolupráce ---------- */
.models {
  display: grid;
  gap: 1.25rem;
}

@media (min-width: 720px) {
  .models {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.model-featured {
  border-color: var(--accent);
  box-shadow: inset 0 0 0 1px var(--accent);
}

.facts {
  display: grid;
  gap: 1px;
  margin-top: 1.25rem;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--line);
}

@media (min-width: 720px) {
  .facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.fact {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  padding: clamp(1.25rem, 3vw, 1.75rem);
  background: var(--surface);
}

.fact .icon-box {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 10px;
}

.fact .icon-box svg {
  width: 1.25rem;
  height: 1.25rem;
}

.fact dt {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.fact dd {
  margin-top: 0.25rem;
  font-size: 1rem;
}

/* ---------- O mně ---------- */
.about-grid {
  display: grid;
  gap: 2rem;
}

@media (min-width: 900px) {
  .about-grid {
    grid-template-columns: minmax(0, 0.75fr) minmax(0, 1.25fr);
    gap: 4rem;
  }

  .about-grid .section-head {
    position: sticky;
    top: calc(var(--header-h) + 2rem);
    align-self: start;
  }
}

.prose {
  font-size: clamp(1.0625rem, 1.5vw, 1.1875rem);
}

.education {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  margin-top: 2rem;
  padding: 1.25rem 1.5rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.education p {
  font-size: 1rem;
}

.education .icon-box {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 10px;
}

.education .icon-box svg {
  width: 1.25rem;
  height: 1.25rem;
}

.tools-title {
  margin-top: 2.5rem;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}

.chips li {
  padding: 0.375rem 0.75rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.4;
}

/* ---------- Kontakt ---------- */
.contact-box {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(2rem, 6vw, 4.5rem);
  border-radius: var(--radius-lg);
  background: var(--invert-bg);
  color: var(--invert-text);
}

.contact-box::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  -webkit-mask-image: radial-gradient(ellipse 70% 80% at 100% 0%, #000 20%, transparent 70%);
  mask-image: radial-gradient(ellipse 70% 80% at 100% 0%, #000 20%, transparent 70%);
}

@media (prefers-color-scheme: dark) {
  .contact-box {
    border: 1px solid var(--invert-line);
  }
}

.contact-box .section-head {
  margin-bottom: 0;
}

.contact-box .section-label {
  color: var(--invert-accent);
}

.contact-box .section-intro {
  color: var(--invert-muted);
}

.contact-box :focus-visible {
  outline-color: var(--invert-accent);
}

.contact-list {
  margin-top: clamp(2rem, 5vw, 3rem);
  border-top: 1px solid var(--invert-line);
}

.contact-list li {
  display: grid;
  gap: 0.25rem;
  padding-block: 1.25rem;
  border-bottom: 1px solid var(--invert-line);
}

@media (min-width: 640px) {
  .contact-list li {
    grid-template-columns: 8rem minmax(0, 1fr);
    gap: 1.5rem;
    align-items: baseline;
  }
}

.contact-label {
  color: var(--invert-muted);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.contact-link {
  justify-self: start;
  color: var(--invert-text);
  font-size: clamp(1.25rem, 4.4vw, 2.25rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.2;
  overflow-wrap: break-word;
  text-decoration: none;
  transition: color 0.15s;
}

.contact-link svg {
  display: inline-block;
  width: 0.75em;
  height: 0.75em;
  margin-left: 0.5em;
  vertical-align: -0.02em;
  color: var(--invert-accent);
  transition: transform 0.15s;
}

.contact-link:hover {
  color: var(--invert-accent);
}

.contact-link:hover svg {
  transform: translate(2px, -2px);
}

/* ---------- Patička ---------- */
.site-footer {
  padding-block: 2.5rem 3rem;
  color: var(--muted);
  font-size: 0.875rem;
  line-height: 1.6;
}

.footer-grid {
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 900px) {
  .footer-grid {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
    gap: 3rem;
  }
}

.legal {
  max-width: 44rem;
  font-style: normal;
}

.legal strong {
  color: var(--text);
}

.footer-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
}

.site-footer a {
  text-underline-offset: 0.2em;
}

.site-footer a:hover {
  color: var(--text);
}

/* ---------- Stránka 404 ---------- */
.error-page {
  display: grid;
  min-height: 100vh;
  min-height: 100dvh;
  place-items: center;
  padding-block: 4rem;
}

.error-code {
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: clamp(4rem, 14vw, 8rem);
  font-weight: 500;
  line-height: 1;
  letter-spacing: -0.04em;
}

.error-grid {
  display: grid;
  gap: 2.5rem;
  margin-top: 2.5rem;
}

@media (min-width: 720px) {
  .error-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 3rem;
  }
}

.error-grid h1,
.error-grid h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
}

.error-grid p {
  margin-top: 0.75rem;
  color: var(--muted);
}

.error-grid .btn {
  margin-top: 1.5rem;
}

/* ---------- Pohyb ---------- */
/* Postupné zobrazení při scrollu – čisté CSS (scroll-driven animations).
   Prohlížeče bez podpory zobrazí obsah rovnou, bez animace. */
@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }

  @supports (animation-timeline: view()) {
    .reveal {
      animation: reveal linear both;
      animation-timeline: view();
      animation-range: entry 0% entry 35%;
    }
  }
}

@keyframes reveal {
  from {
    opacity: 0;
    transform: translateY(24px);
  }

  to {
    opacity: 1;
    transform: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

/* ---------- Tisk ---------- */
@media print {
  .site-header,
  .skip-link,
  .hero-actions,
  .hero::before,
  .contact-box::before {
    display: none;
  }

  body,
  .section-alt,
  .card,
  .contact-box {
    background: #fff;
    color: #000;
  }

  .contact-box,
  .contact-box .section-intro,
  .contact-link,
  .contact-label {
    color: #000;
  }

  .section {
    padding-block: 2rem;
  }
}