/* ===== Novaslav site styles ===== */

:root{
  --bg: #0b1320;
  --bg-alt: #101b2d;
  --panel: #13233a;
  --panel-2: #0f1c30;
  --border: #24374f;
  --text: #e8edf5;
  --text-dim: #9fb0c7;
  --accent: #4fd1ff;      /* nordic ice */
  --accent-2: #d4af37;    /* gold */
  --accent-3: #c0392b;    /* slavic red */
  --radius: 10px;
  --shadow: 0 10px 30px rgba(0,0,0,0.35);
  --serif: 'Cormorant Garamond', Georgia, 'Times New Roman', serif;
  --sans: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
}

*{ box-sizing: border-box; }

html{ scroll-behavior: smooth; }

body{
  margin: 0;
  background:
    radial-gradient(1200px 600px at 15% -10%, rgba(79,209,255,0.08), transparent 60%),
    radial-gradient(1000px 500px at 100% 0%, rgba(192,57,43,0.08), transparent 55%),
    var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

h1,h2,h3,h4{
  font-family: var(--serif);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: 0.02em;
  color: #fff;
}
h1{ font-size: 2.6rem; }
h2{ font-size: 1.9rem; margin-top: 0; }
h3{ font-size: 1.3rem; }

.gold{ color: var(--accent-2); }
.ice{ color: var(--accent); }
.red{ color: var(--accent-3); }

/* ---------- Header / Nav ---------- */
header.site-header{
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(11,19,32,0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav-wrap{
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.9rem 1.5rem;
}
.logo{
  font-family: var(--serif);
  font-size: 1.5rem;
  font-weight: 700;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  letter-spacing: 0.03em;
}
.logo span{ color: var(--accent); }
.logo:hover{ text-decoration: none; }

nav.main-nav ul{
  list-style: none;
  display: flex;
  gap: 1.6rem;
  margin: 0;
  padding: 0;
}
nav.main-nav a{
  color: var(--text-dim);
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  padding-bottom: 4px;
  border-bottom: 2px solid transparent;
  transition: color .15s, border-color .15s;
}
nav.main-nav a:hover,
nav.main-nav a.active{
  color: #fff;
  text-decoration: none;
  border-color: var(--accent);
}
.nav-toggle{
  display: none;
  background: none;
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  padding: 0.4rem 0.6rem;
  font-size: 1.1rem;
}

@media (max-width: 720px){
  .nav-toggle{ display: block; }
  nav.main-nav{
    display: none;
    width: 100%;
    order: 3;
  }
  nav.main-nav.open{ display: block; }
  nav.main-nav ul{
    flex-direction: column;
    gap: 0;
    padding: 0.5rem 1.5rem 1rem;
  }
  nav.main-nav a{
    display: block;
    padding: 0.6rem 0;
    border-bottom: 1px solid var(--border);
  }
  .nav-wrap{ flex-wrap: wrap; }
}

/* ---------- Layout helpers ---------- */
main{ flex: 1; }
.container{
  max-width: 1100px;
  margin: 0 auto;
  padding: 3rem 1.5rem;
}
.container.narrow{ max-width: 820px; }
.section{ margin-bottom: 3.5rem; }
.section-head{ margin-bottom: 1.4rem; }
.eyebrow{
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.78rem;
  color: var(--accent);
  font-weight: 600;
}
.lede{ color: var(--text-dim); font-size: 1.08rem; max-width: 65ch; }

/* ---------- Hero ---------- */
.hero{
  padding: 4.5rem 1.5rem 3rem;
  text-align: center;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(79,209,255,0.05), transparent);
}
.hero .eyebrow{ display:block; margin-bottom: 0.8rem; }
.hero h1{ font-size: 3.2rem; margin: 0 0 1rem; }
.hero p.lede{ margin: 0 auto 2rem; }
.hero-actions{ display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

.btn{
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .12s, box-shadow .12s, background .15s, border-color .15s;
}
.btn:hover{ text-decoration: none; transform: translateY(-1px); }
.btn-primary{
  background: linear-gradient(135deg, var(--accent), #2a9fd6);
  color: #05141f;
}
.btn-primary:hover{ box-shadow: 0 8px 22px rgba(79,209,255,0.25); }
.btn-outline{
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}
.btn-outline:hover{ border-color: var(--accent); color: var(--accent); }
.btn-sm{ padding: 0.45rem 1rem; font-size: 0.85rem; }

/* ---------- Cards / Grid ---------- */
.grid{ display: grid; gap: 1.4rem; }
.grid-2{ grid-template-columns: repeat(2, 1fr); }
.grid-3{ grid-template-columns: repeat(3, 1fr); }
.grid-4{ grid-template-columns: repeat(4, 1fr); }
@media (max-width: 860px){
  .grid-2, .grid-3, .grid-4{ grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px){
  .grid-2, .grid-3, .grid-4{ grid-template-columns: 1fr; }
}

.card{
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
}
.card h3{ margin-top: 0; }
.card-link{
  display: block;
  color: inherit;
}
.card-link:hover{ text-decoration: none; border-color: var(--accent); }
.card-link:hover h3{ color: var(--accent); }
.icon-tile{
  width: 42px; height: 42px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 8px;
  background: rgba(79,209,255,0.12);
  color: var(--accent);
  font-family: var(--serif);
  font-size: 1.3rem;
  margin-bottom: 0.9rem;
}

/* ---------- Example / translation display card ---------- */
.example-card{
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel);
  padding: 1.6rem 1.8rem;
  box-shadow: var(--shadow);
}
.example-novaslav{
  font-family: var(--serif);
  font-size: 1.7rem;
  color: #fff;
  margin: 0 0 0.2rem;
}
.example-latin{
  color: var(--accent);
  font-style: italic;
  margin: 0 0 0.6rem;
}
.example-english{
  color: var(--text-dim);
  margin: 0 0 1rem;
}
.breakdown{
  border-top: 1px dashed var(--border);
  padding-top: 0.9rem;
  display: grid;
  gap: 0.5rem;
}
.breakdown-row{
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 0.8rem;
  font-size: 0.92rem;
}
.breakdown-row b{ color: var(--accent-2); font-family: var(--serif); font-size: 1.02rem; }
.breakdown-row span{ color: var(--text-dim); }

/* ---------- Tables ---------- */
table{
  width: 100%;
  border-collapse: collapse;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
th, td{
  text-align: left;
  padding: 0.7rem 0.9rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.95rem;
}
th{
  background: var(--panel-2);
  color: var(--accent-2);
  font-family: var(--serif);
  font-weight: 600;
  letter-spacing: 0.03em;
}
tr:last-child td{ border-bottom: none; }
.table-wrap{ overflow-x: auto; }

/* ---------- Alphabet grid ---------- */
.alpha-grid{
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(84px, 1fr));
  gap: 0.7rem;
}
.alpha-tile{
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.8rem 0.5rem;
  text-align: center;
}
.alpha-tile .cyr{
  font-family: var(--serif);
  font-size: 1.6rem;
  color: #fff;
  display: block;
}
.alpha-tile .lat{
  color: var(--accent);
  font-size: 0.8rem;
  display: block;
  margin-top: 0.15rem;
}
.alpha-tile.special{ border-color: var(--accent-2); }
.alpha-tile.special .cyr{ color: var(--accent-2); }

/* ---------- Tabs ---------- */
.tabs{
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1.6rem;
}
.tab-btn{
  background: none;
  border: none;
  color: var(--text-dim);
  padding: 0.7rem 1rem;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  font-family: var(--sans);
}
.tab-btn:hover{ color: #fff; }
.tab-btn.active{ color: var(--accent); border-color: var(--accent); }
.tab-panel{ display: none; }
.tab-panel.active{ display: block; }

/* ---------- Forms ---------- */
label{ display:block; font-size: 0.85rem; color: var(--text-dim); margin-bottom: 0.35rem; font-weight: 600; letter-spacing: 0.02em; }
input[type=text], input[type=search], select, textarea{
  width: 100%;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.65rem 0.8rem;
  border-radius: 8px;
  font-size: 0.98rem;
  font-family: var(--sans);
}
input:focus, select:focus, textarea:focus{
  outline: none;
  border-color: var(--accent);
}
.field{ margin-bottom: 1.1rem; }
.field-row{ display: flex; gap: 1rem; flex-wrap: wrap; }
.field-row > .field{ flex: 1; min-width: 180px; }

.radio-group{ display: flex; gap: 1.2rem; flex-wrap: wrap; }
.radio-group label{
  display: flex; align-items: center; gap: 0.4rem;
  color: var(--text); font-weight: 500; margin: 0;
  cursor: pointer;
}
.radio-group input{ accent-color: var(--accent); }

/* ---------- Chips / filters ---------- */
.chip-row{ display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 1.4rem; }
.chip{
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--text-dim);
  padding: 0.4rem 0.9rem;
  border-radius: 999px;
  font-size: 0.85rem;
  cursor: pointer;
  font-weight: 600;
}
.chip:hover{ color: #fff; border-color: var(--accent); }
.chip.active{ background: var(--accent); color: #05141f; border-color: var(--accent); }

.badge{
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.15rem 0.55rem;
  border-radius: 999px;
  background: rgba(212,175,55,0.15);
  color: var(--accent-2);
}

/* ---------- Flashcards ---------- */
.flashcard-stage{
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.2rem;
}
.flashcard{
  width: 100%;
  max-width: 420px;
  height: 220px;
  perspective: 1200px;
  cursor: pointer;
}
.flashcard-inner{
  position: relative;
  width: 100%; height: 100%;
  transition: transform 0.5s;
  transform-style: preserve-3d;
}
.flashcard.flipped .flashcard-inner{ transform: rotateY(180deg); }
.flashcard-face{
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  text-align: center;
  box-shadow: var(--shadow);
}
.flashcard-face.back{ transform: rotateY(180deg); }
.flashcard-face .cyr{ font-family: var(--serif); font-size: 2.2rem; color:#fff; }
.flashcard-face .lat{ color: var(--accent); font-style: italic; margin-top: 0.3rem; }
.flashcard-face .eng{ font-family: var(--serif); font-size: 1.8rem; color:#fff; }
.flashcard-face .hint{ color: var(--text-dim); font-size: 0.8rem; margin-top: 1rem; }
.flashcard-nav{ display: flex; gap: 0.8rem; align-items: center; }
.flashcard-count{ color: var(--text-dim); font-size: 0.9rem; }

/* ---------- Quiz ---------- */
.quiz-progress{
  height: 6px;
  background: var(--border);
  border-radius: 999px;
  overflow: hidden;
  margin-bottom: 1.5rem;
}
.quiz-progress-bar{
  height: 100%;
  background: var(--accent);
  width: 0%;
  transition: width .25s;
}
.quiz-prompt{
  font-family: var(--serif);
  font-size: 2rem;
  color: #fff;
  margin-bottom: 0.3rem;
}
.quiz-sub{ color: var(--text-dim); margin-bottom: 1.6rem; }
.quiz-options{ display: grid; gap: 0.8rem; grid-template-columns: 1fr 1fr; }
@media (max-width: 560px){ .quiz-options{ grid-template-columns: 1fr; } }
.quiz-option{
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.9rem 1rem;
  border-radius: 8px;
  text-align: left;
  font-size: 1rem;
  cursor: pointer;
  font-family: var(--sans);
}
.quiz-option:hover{ border-color: var(--accent); }
.quiz-option.correct{ background: rgba(46,204,113,0.18); border-color: #2ecc71; }
.quiz-option.wrong{ background: rgba(192,57,43,0.2); border-color: var(--accent-3); }
.quiz-option[disabled]{ cursor: default; }
.quiz-score{ font-family: var(--serif); font-size: 1.4rem; color: var(--accent-2); }
.quiz-result{ text-align: center; padding: 2rem 0; }

/* ---------- Speak button ---------- */
.speak-btn{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.9rem;
  height: 1.9rem;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  font-size: 0.9rem;
  line-height: 1;
  cursor: pointer;
  vertical-align: middle;
  margin-left: 0.5rem;
  padding: 0;
}
.speak-btn:hover{ border-color: var(--accent); color: var(--accent); }

/* ---------- Translate panel (Word Builder) ---------- */
.translate-panel{
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 0.8rem;
  align-items: stretch;
}
@media (max-width: 720px){
  .translate-panel{ grid-template-columns: 1fr; }
  .swap-btn{ justify-self: center; transform: rotate(90deg); }
}
.translate-box{
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.translate-box-header{
  padding: 0.7rem 1rem;
  border-bottom: 1px solid var(--border);
  font-family: var(--serif);
  font-weight: 600;
  color: var(--accent);
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.translate-box textarea{
  flex: 1;
  border: none;
  background: transparent;
  resize: none;
  min-height: 140px;
  padding: 1rem;
  font-size: 1.05rem;
  color: var(--text);
  font-family: var(--sans);
}
.translate-box textarea:focus{ outline: none; }
.translate-output{
  flex: 1;
  min-height: 140px;
  padding: 1rem;
  font-size: 1.15rem;
  font-family: var(--serif);
  color: #fff;
  white-space: pre-wrap;
  word-break: break-word;
}
.translate-output .missing-word{ color: var(--accent-3); font-style: italic; }
.swap-btn{
  align-self: center;
  width: 2.6rem;
  height: 2.6rem;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--accent);
  font-size: 1.2rem;
  cursor: pointer;
}
.swap-btn:hover{ border-color: var(--accent); background: var(--panel-2); }

/* ---------- Site language picker ---------- */
.lang-picker{ position: relative; }
.lang-picker-btn{
  width: 2.3rem;
  height: 2.3rem;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  font-size: 1.1rem;
  cursor: pointer;
}
.lang-picker-btn:hover{ border-color: var(--accent); }
.lang-picker-menu{
  display: none;
  position: absolute;
  top: calc(100% + 0.5rem);
  right: 0;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: var(--shadow);
  padding: 0.4rem;
  min-width: 160px;
  z-index: 60;
}
.lang-picker-menu.open{ display: block; }
.lang-picker-menu .lang-option{
  display: block;
  width: 100%;
  text-align: left;
  padding: 0.5rem 0.7rem;
  border-radius: 6px;
  border: none;
  background: none;
  color: var(--text);
  font-size: 0.9rem;
  font-family: var(--sans);
  cursor: pointer;
}
.lang-picker-menu .lang-option:hover{ background: var(--panel-2); color: var(--accent); }

/* ---------- Misc ---------- */
.divider{ border: none; border-top: 1px solid var(--border); margin: 2.5rem 0; }
.note{
  background: rgba(212,175,55,0.08);
  border: 1px solid rgba(212,175,55,0.3);
  border-left: 3px solid var(--accent-2);
  padding: 0.9rem 1.1rem;
  border-radius: 6px;
  font-size: 0.92rem;
  color: var(--text-dim);
}
.note b{ color: var(--accent-2); }
.empty-state{ color: var(--text-dim); text-align: center; padding: 2.5rem 1rem; }

.json-toggle-wrap{ margin-top: 1rem; }
pre.json-view{
  background: #060c16;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem;
  font-size: 0.82rem;
  color: #9fe6ff;
  overflow-x: auto;
  display: none;
}
pre.json-view.show{ display: block; }

/* ---------- Footer ---------- */
footer.site-footer{
  border-top: 1px solid var(--border);
  background: var(--bg-alt);
  padding: 2rem 1.5rem;
  margin-top: 2rem;
}
.footer-wrap{
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  color: var(--text-dim);
  font-size: 0.85rem;
}
.footer-wrap a{ color: var(--text-dim); margin-left: 1.2rem; }
.footer-wrap a:hover{ color: var(--accent); }