/* =========================
   DESIGN TOKENS
========================= */

:root {
  --bg: #fafafa;
  --surface: #ffffff;

  --text: #0f172a;
  --muted: #64748b;
  --border: #e5e7eb;
  --accent: #0076ad;
  --math-text: #0d55b9;

  --code-bg: #f6f8fb; /* subtle blue-gray */
  --code-header-bg: rgba(0, 0, 0, 0.03);
  --code-header-text: #475569;

  --quote-bg: rgba(0, 0, 0, 0.02);
  --table-head-bg: rgba(0, 0, 0, 0.03);
}

[data-theme="dark"] {
  --bg: #0b0f14;
  --surface: #0f172a;

  --text: #e6edf3;
  --muted: #9ca3af;
  --border: #1f2937;
  --accent: #0b92cc;
  --math-text: #7cc4ff;

  --code-bg: #0f172a;
  --code-text: #e6edf3;
  --code-header-bg: rgba(255, 255, 255, 0.06);
  --code-header-text: #cbd5e1;

  --quote-bg: rgba(255, 255, 255, 0.04);
  --table-head-bg: rgba(255, 255, 255, 0.05);
}

/* =========================
   BASE
========================= */

#icon-sun {
  display: none;
}
#icon-moon {
  display: block;
}

[data-theme="dark"] #icon-sun {
  display: block;
}
[data-theme="dark"] #icon-moon {
  display: none;
}

.theme-toggle {
  margin-left: 18px;
  border: 1px solid var(--border);
  background: var(--surface);
  cursor: pointer;
  color: var(--muted);
  padding: 7px;
  border-radius: 10px;
  transition: all 0.15s ease;
}

.theme-toggle:hover {
  color: var(--text);
  border-color: var(--accent);
}

html {
  background: var(--bg);
}

body {
  margin: 0;
  -webkit-text-size-adjust: 100%; /* Add this */
  text-size-adjust: 100%; /* Add this */
  font-family:
    Inter,
    system-ui,
    -apple-system,
    Segoe UI,
    Roboto,
    sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
}

/* =========================
   LAYOUT
========================= */

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 32px 20px;
}

/* =========================
   NAV
========================= */

.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 20;
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-weight: 600;
  font-size: 18px;
  text-decoration: none;
  color: var(--text);
}

.nav-links a {
  margin-left: 22px;
  text-decoration: none;
  color: var(--muted);
  font-size: 15px;
}

.nav-links a:hover {
  color: var(--text);
}

/* =========================
   TYPOGRAPHY
========================= */

h1,
h2,
h3,
h4,
h5,
h6 {
  color: var(--text);
  line-height: 1.3;
  font-weight: 600;
}

h1 {
  font-size: 40px;
  margin: 48px 0 24px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

h2 {
  font-size: 30px;
  margin: 40px 0 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

h3 {
  font-size: 24px;
  margin: 32px 0 12px;
}

h4 {
  font-size: 20px;
  margin: 28px 0 8px;
}

h5 {
  font-size: 18px;
  margin: 24px 0 8px;
}

h6 {
  font-size: 16px;
  margin: 24px 0 8px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
}

p,
ul,
ol {
  font-size: 18px;
  line-height: 1.7;
  margin: 16px 0;
}

li {
  margin: 8px 0;
}

a {
  color: var(--accent);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

/* =========================
   CODE
========================= */

/* inline */
code {
  font-family: "JetBrains Mono", monospace;
  font-size: 14px;
  background: rgba(0, 118, 173, 0.08);
  padding: 2px 6px;
  border-radius: 6px;
}

[data-theme="dark"] code {
  background: rgba(11, 146, 204, 0.12);
}

/* container */
.code-block {
  margin: 40px 0;
  border-radius: 16px;
  overflow: hidden;
  background: var(--code-bg);
  border: 1px solid var(--border);
}

/* NEW: scrolling happens here */
.code-scroll {
  overflow-x: auto;
  padding-bottom: 14px; /* distance from code to scrollbar */
}

/* header */
.code-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--code-header-bg);
  color: var(--code-header-text);
  font-size: 13px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
}

.code-scroll {
  overflow-x: auto;
  padding: 0; /* space above scrollbar */
}

/* create extra space at the far right when fully scrolled */
.code-scroll pre code {
  padding-right: 22px;
  display: inline-block;
  min-width: calc(100% - 44px);
}

/* highlight.js override */
.code-scroll pre code.hljs {
  padding-right: 22px !important;
}

.code-header::before {
  content: "";
  width: 6px;
  height: 100%;
  background: var(--accent);
  margin-right: 10px;
  border-radius: 6px 0 0 6px;
}

/* REMOVE padding inside block */
pre {
  padding: 18px 22px;
  background: transparent;
  overflow: visible !important;
}

/* highlight.js injects padding → override */
pre code.hljs {
  display: block;
  padding: 0 !important;
  margin: 0 !important;
  background: transparent !important;
}

/* real code text */
pre code {
  font-family: "JetBrains Mono", monospace;
  font-size: 14px;
  line-height: 1.65;
  color: var(--code-text);
  letter-spacing: 0.2px;
  font-weight: 500;
}

.hljs {
  background: transparent !important;
  color: var(--code-text);
}

[data-theme="dark"] .hljs {
  color: #e6edf3;
}

[data-theme="dark"] .code-block {
  background: #0f172a;
  border: 1px solid rgba(255, 255, 255, 0.06);
}

[data-theme="dark"] .code-header {
  background: rgba(255, 255, 255, 0.04);
}

/* =========================
   COPY BUTTON
========================= */

.copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: transparent;
  border: none;
  color: var(--code-header-text);
  padding: 6px 8px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 12px;
}
.copy-btn:hover {
  background: rgba(0, 0, 0, 0.06);
}

/* =========================
   DARK TOGGLE
========================= */

.theme-toggle {
  margin-left: 18px;
  border: none;
  background: transparent;
  cursor: pointer;
  color: var(--muted);
  padding: 6px;
  border-radius: 6px;
}
.theme-toggle:hover {
  background: rgba(0, 0, 0, 0.05);
}

/* =========================
   BLOCKQUOTE
========================= */

blockquote {
  margin: 28px 0;
  padding: 14px 18px;
  border-left: 4px solid var(--border);
  background: var(--quote-bg);
  color: var(--text);
}

/* =========================
   TABLES
========================= */

table {
  width: 100%;
  border-collapse: collapse;
  margin: 0;
  font-size: 15px;
}

thead {
  background: var(--table-head-bg);
}

th {
  text-align: left;
  font-weight: 600;
  padding: 12px 14px;
}

td {
  padding: 12px 14px;
}

tbody tr + tr {
  border-top: 1px solid var(--border);
}

tbody tr:hover {
  background: rgba(0, 0, 0, 0.03);
}

[data-theme="dark"] tbody tr:hover {
  background: rgba(255, 255, 255, 0.04);
}

.table-wrapper {
  overflow-x: auto;
  margin: 28px 0;
  border-radius: 14px;
  background: var(--surface);
  padding-bottom: 14px;
  border: 1px solid var(--border);
}

.table-wrapper table {
  margin: 0;
  min-width: 640px;
  border-collapse: collapse;
  width: 100%;
}

/* =========================
   FOOTER
========================= */

.footer {
  margin-top: 60px;
  color: var(--muted);
  font-size: 14px;
}

/*scrollbar*/

/* scrolling containers */
.code-scroll,
.table-wrapper {
  overflow-x: auto;
  overflow-y: hidden;

  padding-bottom: 14px; /* distance from content to scrollbar */
}

/* pre must not scroll */
.code-scroll pre {
  overflow: visible !important;
  margin: 0;
}

/* highlight.js override */
.code-scroll pre code.hljs {
  overflow: visible !important;
  display: inline-block;
  min-width: 100%;
}

/* identical scrollbar styling */
.code-scroll::-webkit-scrollbar,
.table-wrapper::-webkit-scrollbar {
  height: 14px;
}

.code-scroll::-webkit-scrollbar-track,
.table-wrapper::-webkit-scrollbar-track {
  background: transparent;
}

.code-scroll::-webkit-scrollbar-thumb,
.table-wrapper::-webkit-scrollbar-thumb {
  background: rgba(120, 120, 120, 0.45);
  border-radius: 999px;
}

.code-scroll::-webkit-scrollbar-thumb:hover,
.table-wrapper::-webkit-scrollbar-thumb:hover {
  background: rgba(90, 90, 90, 0.7);
}

/* Firefox */
.code-scroll,
.table-wrapper {
  scrollbar-width: auto; /* NOT '18px' */
}

/* =========================
   MOBILE NAV
========================= */

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}

.menu-toggle span {
  width: 22px;
  height: 2px;
  background: var(--text);
  display: block;
  border-radius: 2px;
}

/* right-side controls */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* burger hidden on desktop */
.menu-toggle {
  display: none;
  border: none;
  background: transparent;
  cursor: pointer;
  color: var(--text);
  padding: 6px;
  border-radius: 8px;
}

.menu-toggle:hover {
  background: rgba(0, 0, 0, 0.05);
}

/* mobile layout */
@media (max-width: 768px) {
  .nav {
    position: relative;
  }

  .menu-toggle {
    display: block;
  }

  /* dropdown menu */
  .nav-links {
    position: absolute;
    top: 64px;
    right: 16px;
    left: 16px;

    display: none;
    flex-direction: column;
    gap: 12px;

    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 14px 16px;

    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    margin: 0;
    font-size: 16px;
  }
}

/* mobile layout */
@media (max-width: 720px) {
  .nav {
    position: relative;
  }

  .menu-toggle {
    display: flex;
  }

  pre code,
  pre code.hljs {
    font-size: 12px; /* Fixed pixel size is often safer here than em */
  }

  .nav-links {
    position: absolute;
    top: 100%;
    right: 0;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 12px;
    flex-direction: column;
    gap: 10px;
    display: none;
    min-width: 180px;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    margin: 0;
    font-size: 14px;
  }

  h1 {
    font-size: 32px;
    margin: 32px 0 16px;
  }
  h2 {
    font-size: 26px;
    margin: 28px 0 12px;
  }
  h3 {
    font-size: 22px;
    margin: 24px 0 10px;
  }
  h4 {
    font-size: 18px;
    margin: 20px 0 8px;
  }
  h5 {
    font-size: 16px;
    margin: 16px 0 8px;
  }
  h6 {
    font-size: 14px;
    margin: 16px 0 8px;
  }

  p,
  ul,
  ol {
    font-size: 16px;
  }
}

/* =========================
  MOBILE
  CODE
  SCALING
  =========================
  */
@media (pointer: coarse) {
  code,
  pre code {
    font-size: 0.8em !important;
  }

  .container {
    padding: 20px 16px;
  }

  h1 {
    font-size: 28px;
    margin: 28px 0 12px;
  }

  h2 {
    font-size: 22px;
    margin: 24px 0 10px;
  }

  h3 {
    font-size: 18px;
    margin: 18px 0 8px;
  }
}

.katex-display {
  overflow-x: auto;
  overflow-y: hidden;
  padding: 15px;
  font-size: 1.25rem; /* 1.2–1.4 funguje nejlépe */
  margin: 25px 0;
}

.katex {
  max-width: 100%;
  overflow-x: auto;
  overflow-y: hidden;
  color: var(--math-text);
}

/* Clickable Image Container */
.img-link {
  display: block;
  margin: 2rem 0;
  cursor: zoom-in;
  text-decoration: none !important;
}

.img-link img {
  max-width: 100%;
  height: auto;
  border-radius: 12px;
  border: 1px solid var(--border);
  transition:
    transform 0.2s ease,
    border-color 0.2s ease;
}

.img-link:hover img {
  transform: scale(1.01);
  border-color: var(--accent);
}

.img-expand-link {
  display: block;
  margin: 2rem auto;
  max-width: fit-content;
  cursor: zoom-in;
  cursor: zoom-in;
}

.img-expand-link img {
  display: block;
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  border: 1px solid var(--border);
  transition: transform 0.2s ease;
}

.img-expand-link:hover img {
  transform: scale(1.02);
  border-color: var(--accent);
}

/* Modal Background */
.modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(5px);
  justify-content: center;
  align-items: center;
}

/* The Image inside the Modal */
.modal-content {
  max-width: 90%;
  max-height: 90%;
  border-radius: 4px;
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
  cursor: default;
}

/* Close Button */
.close {
  position: absolute;
  top: 20px;
  right: 35px;
  color: #fff;
  font-size: 40px;
  font-weight: bold;
  cursor: pointer;
}