/* reset */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* variables */
:root {
  --font-mono: 'Cascadia Code', 'Cascadia Mono', 'Source Code Pro', Consolas, Menlo, Monaco, monospace;

  --bg:             #f7f7f5;
  --bg-secondary:   #efefec;
  --border:         #e0e0db;
  --border-hover:   #1D9E75;
  --text:           #1a1a18;
  --text-secondary: #6b6b66;
  --text-tertiary:  #a0a09a;
  --accent:         #1D9E75;
  --accent-hover:   #18b880;

  --noise-opacity:  0.02;

  --card-shadow:       0 1px 3px rgba(0,0,0,0.06);
  --card-shadow-hover: 0 8px 24px rgba(0,0,0,0.08);
}

/* tmavý režim — media query */
@media (prefers-color-scheme: dark) {
  :root:not(.light) {
    --bg:             #0e0e0c;
    --bg-secondary:   #1a1a17;
    --border:         #2a2a26;
    --border-hover:   #1D9E75;
    --text:           #e8e8e2;
    --text-secondary: #7a7a72;
    --text-tertiary:  #4a4a44;
    --accent:         #1D9E75;
    --accent-hover:   #22c487;

    --noise-opacity:  0.035;

    --card-shadow:       0 1px 3px rgba(0,0,0,0.3);
    --card-shadow-hover: 0 8px 24px rgba(0,0,0,0.4);
  }
}

/* tmavý režim — třída (JS přepínač) */
:root.dark {
  --bg:             #0e0e0c;
  --bg-secondary:   #1a1a17;
  --border:         #2a2a26;
  --border-hover:   #1D9E75;
  --text:           #e8e8e2;
  --text-secondary: #7a7a72;
  --text-tertiary:  #4a4a44;
  --accent:         #1D9E75;
  --accent-hover:   #22c487;

  --noise-opacity:  0.035;

  --card-shadow:       0 1px 3px rgba(0,0,0,0.3);
  --card-shadow-hover: 0 8px 24px rgba(0,0,0,0.4);
}

/* base */
html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-mono);
  background-color: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color 0.3s ease, color 0.3s ease;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* jemná textura šumu přes celý viewport */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 9999;
  pointer-events: none;
  opacity: var(--noise-opacity);
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
  background-size: 200px 200px;
}

a {
  color: inherit;
  text-decoration: none;
}

main {
  flex: 1;
  max-width: 720px;
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
}

/* theme toggle */
.theme-toggle {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 100;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: border-color 0.15s ease, color 0.15s ease, transform 0.2s ease;
}

.theme-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: scale(1.05);
}

.theme-toggle svg {
  width: 14px;
  height: 14px;
  position: absolute;
  transition: opacity 0.15s ease, transform 0.25s ease;
}

.theme-toggle .icon-sun  { opacity: 1; transform: rotate(0deg)   scale(1);   }
.theme-toggle .icon-moon { opacity: 0; transform: rotate(-20deg) scale(0.7); }

:root.dark .theme-toggle .icon-sun  { opacity: 0; transform: rotate(20deg)  scale(0.7); }
:root.dark .theme-toggle .icon-moon { opacity: 1; transform: rotate(0deg)   scale(1);   }

@media (prefers-color-scheme: dark) {
  :root:not(.light) .theme-toggle .icon-sun  { opacity: 0; transform: rotate(20deg) scale(0.7); }
  :root:not(.light) .theme-toggle .icon-moon { opacity: 1; transform: rotate(0deg)  scale(1);   }
}

/* hero */
.hero {
  padding: 72px 0 56px;
  animation: fadeUp 0.5s ease both;
}

.hero h1 {
  font-family: var(--font-mono);
  font-size: clamp(24px, 4vw, 38px);
  font-weight: 700;
  letter-spacing: -1px;
  line-height: 1.05;
  margin-bottom: 20px;
}

.hero-dot   { color: var(--text-tertiary); font-weight: 700; }
.hero-paren { color: var(--text-tertiary); font-weight: 700; }

.hero-handle {
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -1px;
}

/* blikající kurzor uvnitř typewriteru */
.hero-cursor {
  display: inline-block;
  width: 2px;
  height: 0.75em;
  background: var(--accent);
  position: relative;
  top: 0.08em;
  margin-left: 1px;
  border-radius: 1px;
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0; }
}

.hero-platforms {
  display: flex;
  gap: 4px;
}

/* seznam projektů */
.feed-section {
  padding-bottom: 72px;
  animation: fadeUp 0.5s 0.1s ease both;
}

.feed-label {
  font-size: 12px;
  color: var(--text-tertiary);
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}

.feed {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.feed-card {
  display: flex;
  flex-direction: column;
  cursor: pointer;
  border-radius: 12px;
  border: 1px solid var(--border);
  overflow: hidden;
  background: var(--bg-secondary);
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
  box-shadow: var(--card-shadow);
}

.feed-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--card-shadow-hover);
  transform: translateY(-2px);
}

.card-banner {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 10;
  background: var(--bg-secondary);
  background-size: cover;
  background-position: center;
}

.card-body {
  padding: 12px 14px 14px;
  border-top: 1px solid var(--border);
}

.card-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 4px;
}

.card-title {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: -0.2px;
  line-height: 1.3;
  transition: color 0.15s ease;
}

.feed-card:hover .card-title { color: var(--accent); }

.card-desc {
  font-size: 11px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* footer + platform icons */
.site-footer {
  padding: 28px 24px 40px;
  text-align: center;
}

.platform-icon {
  position: relative;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-tertiary);
  transition: color 0.2s ease, transform 0.2s ease;
}

.platform-icon svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.platform-icon:hover                { transform: translateY(-2px); }
.platform-icon.email:hover          { color: var(--accent); }
.platform-icon.instagram:hover      { color: #e1306c; }
.platform-icon.linkedin:hover       { color: #0a66c2; }
.platform-icon.github:hover         { color: var(--text); }

/* tooltip — zobrazí se při najetí na ikonu */
.platform-tooltip {
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  background: var(--text);
  color: var(--bg);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  padding: 4px 8px;
  border-radius: 4px;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.15s ease, transform 0.15s ease;
}

.platform-tooltip::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 4px solid transparent;
  border-top-color: var(--text);
}

.platform-icon:hover .platform-tooltip {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.copyright {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-tertiary);
}

/* animace */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

@media (prefers-reduced-motion: reduce) {
  .hero, .feed-section { animation: none; }
  html { scroll-behavior: auto; }
  .feed-card { transition: none; }
}

/* responzivita */
@media (max-width: 520px) {
  main { padding: 0 16px; }
  .hero { padding: 48px 0 40px; }
  .feed { grid-template-columns: 1fr; }
  .site-footer { padding: 28px 16px 36px; }
}