:root {
  --bg-0: #000000;
  --bg-1: #050505;
  --bg-2: #0a0a0a;
  --ink: #eaf2f5;
  --muted: #a4b1ba;
  --accent: #ff8747;
  --accent-2: #2dd4bf;
  --card: #050505;
  --card-strong: #0a0a0a;
  --border: rgba(255, 255, 255, 0.08);
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
}

html,
body {
  background: #000;
}

body {
  font-family: "Figtree", "Segoe UI", sans-serif;
  background: #000;
  color: var(--ink);
}

.app-shell {
  min-height: 100vh;
  background: #000;
}

.hero {
  padding: 40px 24px 20px;
  text-align: center;
}

.hero h1 {
  font-size: clamp(2.2rem, 4vw, 3.4rem);
  letter-spacing: 0.02em;
}

.hero-subtitle {
  color: var(--muted);
  max-width: 560px;
  margin: 8px auto 0;
  font-size: 1rem;
}

.jumbotron {
  width: min(1100px, 96vw);
  margin: 0 auto;
  padding: 24px;
  border-radius: 28px;
  background: var(--card);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
}

.kanji-panel {
  background: var(--card-strong);
  border-radius: 20px;
  border: 1px solid var(--border);
  padding: 20px;
  margin-bottom: 20px;
}

.form-select,
.form-control,
.input-group-text {
  background-color: #000;
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: var(--ink);
}

.form-select:focus,
.form-control:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 0.2rem rgba(255, 135, 71, 0.15);
}

.btn-outline-success,
.btn-outline-danger,
.btn-outline-primary,
.btn-outline-light,
.btn-outline-secondary,
.btn-outline-warning {
  border-radius: 999px;
}

.btn-outline-warning {
  border-color: var(--accent);
  color: var(--accent);
}

.btn-outline-warning:hover {
  background-color: var(--accent);
  color: #0b1117;
}

.btn-outline-secondary:hover,
.btn-outline-primary:hover {
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.3);
}

#kanjiAsk {
  font-family: "Noto Sans JP", serif;
  font-size: clamp(2.5rem, 4vw, 4rem);
  background: linear-gradient(135deg, rgba(255, 135, 71, 0.25), rgba(45, 212, 191, 0.2));
  border: 1px solid rgba(255, 255, 255, 0.12);
  padding: 8px 16px;
  border-radius: 18px;
}

.progress {
  height: 20px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
}

.progress-bar {
  font-weight: 600;
  letter-spacing: 0.04em;
}

.list-group-item {
  background: #070707;
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--ink);
}

.card {
  background: #050505;
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: var(--shadow);
}

.accordion-button {
  background: #0a0a0a;
  color: var(--ink);
}

.accordion-button:not(.collapsed) {
  background: rgba(255, 135, 71, 0.15);
  color: var(--ink);
}

.accordion-body {
  color: var(--muted);
}

.footer {
  background: #050505;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 10px 0;
}

.footer-inner {
  background: transparent;
}

.toast {
  border-radius: 16px;
  background: #0a0a0a;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

body.focus-active .focus-hide {
  display: none !important;
}

body.focus-active .jumbotron {
  padding-top: 16px;
}

body.focus-active .kanji-panel {
  margin-bottom: 12px;
}

@media (max-width: 768px) {
  .jumbotron {
    padding: 18px;
  }

  .hero {
    padding: 32px 16px 14px;
  }
}