/* =========================================
   1. PREMENNÉ A TMAVÝ REŽIM (FARBY)
   ========================================= */
:root {
  --bg-primary: #f5f7fa;
  --bg-secondary: #ffffff;
  --bg-tertiary: #e8ecf1;
  --text-primary: #1a1a1a;
  --text-secondary: #4a4a4a;
  --border-color: #d0d7e0;
  --header-bg: #003d7a;
  --header-text: #ffffff;
  --accent-color: #0066cc;
  --accent-hover: #0052a3;
  --success-color: #28a745;
  --error-color: #dc3545;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.15);
}

/* Definícia tmavého režimu */
html.tmavyRezim {
  --bg-primary: #0f1419;
  --bg-secondary: #1a1f2e;
  --bg-tertiary: #252d3d;
  --text-primary: #e0e0e0;
  --text-secondary: #a0a0a0;
  --border-color: #3a4555;
  --header-bg: #001a4d;
  --header-text: #ffffff;
  --accent-color: #3399ff;
  --accent-hover: #2680d8;
  --success-color: #51cf66;
  --error-color: #ff6b6b;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.4);
}

/* =========================================
   2. GLOBÁLNE NASTAVENIA
   ========================================= */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  transition: background-color 0.3s, color 0.3s;
  line-height: 1.6;
}

/* Vlastný scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-secondary);
}

/* =========================================
   3. HLAVIČKA (HEADER)
   ========================================= */
.os-hlavicka {
  background: linear-gradient(135deg, var(--header-bg) 0%, #005a9c 100%);
  color: var(--header-text);
  padding: 1.5rem 2rem;
  box-shadow: var(--shadow-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.hlavicka-obsah {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex: 1;
}

.hlavicka-logo {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.hlavicka-podtitulok {
  font-size: 0.85rem;
  opacity: 0.9;
}

.hlavicka-ovladanie {
  display: flex; 
}

.prepnutie-rezim {
  background: rgba(255, 255, 255, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: white;
  padding: 0.5rem 1rem;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.3s;
  font-size: 0.9rem;
  font-weight: 500;
}

.prepnutie-rezim:hover {
  background: rgba(255, 255, 255, 0.3);
}

/* =========================================
   4. ROZLOŽENIE STRÁNKY (LAYOUT)
   ========================================= */
.os-akademia {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.hlavny-kontajner {
  display: flex;
  flex: 1;
  gap: 0;
}

/* =========================================
   5. NAVIGÁCIA A BOČNÝ PANEL
   ========================================= */
.bocny-panel {
  width: 280px;
  background-color: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  overflow-y: auto;
  padding: 1.5rem 0;
  box-shadow: var(--shadow);
}

.bocny-panel-modul {
  margin-bottom: 0.5rem;
}

.nazov-modulu {
  padding: 0.75rem 1.5rem;
  font-weight: 600;
  cursor: pointer;
  user-select: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: all 0.2s;
  color: var(--text-primary);
  border-left: 3px solid transparent;
  background: none;
  border: none;
  width: 100%;
  text-align: left;
  font-size: 1rem;
}

.nazov-modulu:hover {
  background-color: var(--bg-tertiary);
  border-left-color: var(--accent-color);
}

.nazov-modulu.aktivny {
  background-color: var(--bg-tertiary);
  border-left-color: var(--accent-color);
  color: var(--accent-color);
}

.sipka-modulu {
  transition: transform 0.3s;
  font-size: 0.8rem;
  display: inline-block;
}

.sipka-modulu.otvorene {
  transform: rotate(180deg);
}

.podmenu {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.podmenu.otvorene {
  max-height: 500px;
}

.polozka-podmenu {
  padding: 0.6rem 1.5rem 0.6rem 2.5rem;
  cursor: pointer;
  transition: all 0.2s;
  color: var(--text-secondary);
  font-size: 0.9rem;
  border-left: 2px solid transparent;
  background: none;
  border: none;
  width: 100%;
  text-align: left;
}

.polozka-podmenu:hover {
  color: var(--accent-color);
  background-color: var(--bg-tertiary);
  border-left-color: var(--accent-color);
}

.polozka-podmenu.aktivny {
  color: var(--accent-color);
  background-color: var(--bg-tertiary);
  border-left-color: var(--accent-color);
  font-weight: 600;
}

/* =========================================
   6. OBSAH A KARTY
   ========================================= */
.obsah {
  flex: 1;
  overflow-y: auto;
  padding: 2rem;
}

.sekcia-obsahu {
  display: none;
  animation: zmiznutie 0.3s ease;
}

.sekcia-obsahu.aktivny {
  display: block;
}

@keyframes zmiznutie {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.karta {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 2rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow);
  transition: all 0.3s;
}

.karta:hover {
  box-shadow: var(--shadow-lg);
}

/* Typografia vnútri karty */
.karta h2 {
  color: var(--text-primary);
  margin-bottom: 1rem;
  font-size: 1.8rem;
  border-bottom: 2px solid var(--accent-color);
  padding-bottom: 0.5rem;
}

.karta h3 {
  color: var(--accent-color);
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
  font-size: 1.2rem;
}

.karta p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
  line-height: 1.8;
}

.karta ul, .karta ol {
  margin-left: 1.5rem;
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

.karta li {
  margin-bottom: 0.5rem;
  line-height: 1.6;
}

/* =========================================
   7. TABUĽKY
   ========================================= */
.tabulka-wrapper {
  overflow-x: auto;
  margin: 1.5rem 0;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.tabulka-data {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--bg-secondary);
  font-size: 0.95rem;
  color: var(--text-primary);
}

/* Hlavička tabuľky */
.tabulka-data thead {
  background-color: var(--header-bg);
  color: #ffffff;
}

.tabulka-data th {
  padding: 12px 15px;
  text-align: left;
  font-weight: 600;
  letter-spacing: 0.5px;
  border-bottom: 2px solid var(--accent-color);
}

/* Telo tabuľky */
.tabulka-data td {
  padding: 12px 15px;
  border-bottom: 1px solid var(--border-color);
}

/* Zebra efekt (párne riadky) */
.tabulka-data tbody tr:nth-of-type(even) {
  background-color: rgba(0, 0, 0, 0.02);
}

/* Hover efekt */
.tabulka-data tbody tr:hover {
  background-color: rgba(0, 102, 204, 0.05);
}

/* Špeciálna úprava tabuľky pre tmavý režim */
html.tmavyRezim .tabulka-data tbody tr:nth-of-type(even) {
  background-color: rgba(255, 255, 255, 0.03);
}

/* =========================================
   8. RESPONZIVITA (MOBILY)
   ========================================= */
@media (max-width: 768px) {
  .hlavny-kontajner {
    flex-direction: column;
  }

  .bocny-panel {
    width: 100%;
    border-right: none;
    border-bottom: 1px solid var(--border-color);
    max-height: 300px;
    overflow-y: auto;
  }

  .obsah {
    padding: 1rem;
  }

  .os-hlavicka {
    flex-direction: column;
    text-align: center;
  }

  .hlavicka-obsah {
    flex-direction: column;
    text-align: center;
  }

  .karta {
    padding: 1rem;
  }

  .karta h2 {
    font-size: 1.4rem;
  }
}

/* =========================================
   9. ŠTÝLY PRE TESTY A KVÍZY
   ========================================= */

/* Kontajner pre otázky */
.test-kontajner {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.otazka-box {
  background-color: var(--bg-tertiary);
  padding: 1.5rem;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  transition: transform 0.2s;
}

.otazka-box h4 {
  margin-bottom: 1rem;
  color: var(--text-primary);
  font-size: 1.1rem;
}

/* Tlačidlá možností */
.moznosti-wrapper {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.tlacidlo-test {
  padding: 12px 15px;
  text-align: left;
  cursor: pointer;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  border-radius: 6px;
  font-size: 1rem;
  transition: all 0.2s ease;
  font-family: inherit;
}

.tlacidlo-test:hover:not(:disabled) {
  border-color: var(--accent-color);
  background-color: rgba(0, 102, 204, 0.05);
}

/* Stav: Označené (pred vyhodnotením vo finálnom teste) */
.tlacidlo-test[data-oznacene="true"] {
  background-color: var(--header-bg); /* Tmavomodrá */
  color: white;
  border-color: var(--header-bg);
  transform: translateX(5px); /* Jemný posun doprava */
  box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}

/* Stav: Správne/Nesprávne (po vyhodnotení) */
.tlacidlo-test.spravne {
  background-color: var(--success-color) !important;
  color: white !important;
  border-color: var(--success-color) !important;
}

.tlacidlo-test.nespravne {
  background-color: var(--error-color) !important;
  color: white !important;
  border-color: var(--error-color) !important;
  opacity: 0.7;
}

/* Tlačidlo na vyhodnotenie testu */
.tlacidlo-vyhodnotit {
  background-color: var(--accent-color);
  color: white;
  border: none;
  padding: 1rem 2rem;
  font-size: 1.1rem;
  font-weight: 600;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.3s;
  box-shadow: var(--shadow);
  display: inline-block;
  margin-top: 1rem;
}

.tlacidlo-vyhodnotit:hover {
  background-color: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* Box pre výslednú známku */
.vysledok-box {
  margin-top: 2rem;
  padding: 2rem;
  border-radius: 12px;
  text-align: center;
  background-color: var(--bg-secondary);
  border: 2px solid transparent;
  animation: zmiznutie 0.5s ease;
}