/* =========================
   Zero to Hero – Base Styles
   ========================= */

* { box-sizing: border-box; margin: 0; padding: 0; }

:root{
  --bg1:#7a2c7d;
  --bg2:#4a144c;
  --ink:#ffffff;
  --btnInk:#5a1f5f;
  --grid: rgba(255,255,255,0.05);
  
  --font-ui: system-ui, -apple-system, "Segoe UI", Roboto, Arial,
    "Hiragino Sans", "Hiragino Kaku Gothic ProN",
    "Yu Gothic", "Meiryo",
    "Noto Sans JP", "Noto Sans CJK JP",
    sans-serif;

  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas,
    "Liberation Mono", "Courier New",
    "Noto Sans Mono CJK JP", "Noto Sans JP",
    "Yu Gothic", "Meiryo",
    monospace;
}

body{
  font-family: var(--font-ui);
  background: radial-gradient(circle at top, var(--bg1), var(--bg2));
  min-height: 100vh;
  color: var(--ink);
  overflow-x: hidden;
}

/* Grid background */
body::before{
  content:"";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}

.screen{
  min-height: 100vh;
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem;
  position: relative;
}

.screen.active{ display: flex; }

/* Typography */
.title{
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 900;
  letter-spacing: 0.12em;
  margin-bottom: 0.75rem;
}

.title.small{
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
  margin-bottom: 0.5rem;
}

.subtitle{
  font-family: var(--font-mono);
  opacity: 0.9;
  margin-bottom: 2.25rem;
}
html[lang="ja"] .subtitle{
  font-family: var(--font-ui);
}

/* Button grid */
.button-grid{
  display: grid;
  grid-template-columns: repeat(2, minmax(160px, 260px));
  gap: 1.25rem;
  align-items: stretch;
  justify-items: stretch;
}

button, a.secondary{
  border: none;
  cursor: pointer;
  padding: 1.05rem 1.6rem;
  border-radius: 999px;
  font-weight: 800;
  letter-spacing: 0.06em;
  background: #fff;
  color: var(--btnInk);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  text-decoration: none;
}

a.secondary{
  display:flex;
  align-items:center;
  justify-content:center;
  text-align:center;
  line-height: 1.1;
}

button:hover, a.secondary:hover{
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(0,0,0,0.25);
}

button.primary.small{
  padding: 0.8rem 1.2rem;
  border-radius: 999px;
}

/* Quit button */
.quit-button{
  position: absolute;
  top: 1.25rem;
  left: 1.25rem;
  background: transparent;
  color: white;
  border: 2px solid rgba(255,255,255,0.65);
  padding: 0.55rem 0.95rem;
  border-radius: 999px;
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  font-weight: 800;
}

.quit-button:hover{
  background: rgba(255,255,255,0.10);
  box-shadow: none;
  transform: none;
}

/* Learning layout */
.learning-wrap{
  width: min(900px, 100%);
  margin-top: 2.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.controls{
  display: flex;
  gap: 0.9rem;
  align-items: end;
  justify-content: center;
  flex-wrap: wrap;
  margin: 0.75rem 0 1.25rem;
}

.control{
  display:flex;
  flex-direction: column;
  gap: 0.35rem;
  text-align: left;
}

label{
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  opacity: 0.9;
}

select{
  padding: 0.65rem 0.85rem;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.25);
  background: rgba(255,255,255,0.10);
  color: white;
  outline: none;
}

select option{
  color: #1a1a1a;
}

.content{
  width: min(720px, 100%);
  text-align: left;
  background: rgba(0,0,0,0.18);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 18px;
  padding: 1rem 1.1rem;
}

.row{
  padding: 0.75rem 0.25rem;
  border-bottom: 1px solid rgba(255,255,255,0.10);
}

.row:last-child{ border-bottom: none; }

.row strong{
  display:block;
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  margin-bottom: 0.25rem;
}

.row .forms{
  opacity: 0.95;
  line-height: 1.45;
}

/* Mobile */
@media (max-width: 520px){
  .button-grid{ grid-template-columns: 1fr; }
  .quit-button{ top: 1rem; left: 1rem; }
}

button.correct {
  background-color: #4caf50 !important;
  color: white !important;
}

button.incorrect {
  background-color: #e57373 !important;
  color: white !important;
}

button.selected {
  outline: 3px solid #ffffff;
}

button.paired {
  background-color: #4CAF50 !important;
  color: white;
}

button.matched {
  background-color: #4CAF50 !important;
  color: white;
}

button.wrong {
  background-color: #D32F2F !important;
  color: white;
}

.sentence-slot {
  transition: all 0.2s ease;
}

button.selected {
  outline: 2px solid white;
}
/* =========================
   Support Language Selector
   ========================= */

.support-selector{
  margin: 1.75rem 0 2.25rem;
  display:flex;
  flex-direction:column;
  align-items:center;
}

/* Pill (closed state) */
.support-pill{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:1rem;
  background:white;
  color:#1a1a1a;
  padding:0.9rem 1.6rem;
  border-radius:999px;
  cursor:pointer;
  font-weight:800;
  min-width:260px;
  transition:transform 0.1s ease, box-shadow 0.15s ease;
}

.support-pill:hover{
  transform:translateY(-1px);
  box-shadow:0 6px 16px rgba(0,0,0,0.25);
}

/* Short code (EN / PT / JA etc.) */
.support-short{
  font-weight:900;
  font-size:0.85rem;
  letter-spacing:0.12em;
  opacity:0.65;
  min-width:38px;
  text-align:left;
}

/* Dropdown container */
.support-dropdown{
  margin-top:0.75rem;
  background:white;
  border-radius:16px;
  padding:0.5rem;
  width:280px;
  display:flex;
  flex-direction:column;
  gap:0.25rem;
  box-shadow:0 10px 30px rgba(0,0,0,0.3);
}

/* Each dropdown option */
.support-option{
  display:flex;
  align-items:center;
  gap:1rem;
  padding:0.65rem 1rem;
  border-radius:12px;
  cursor:pointer;
  font-weight:700;
  color:#1a1a1a;
  transition:background 0.15s ease;
}

.support-option:hover{
  background:rgba(0,0,0,0.06);
}

/* Chevron */
.chevron{
  opacity:0.6;
  font-size:0.9rem;
}

/* Utility */
.hidden{
  display:none;
}