/* ===== VARIABLES ===== */
:root {
  --color-primary:       #c85a7c;
  --color-primary-light: #fdf0f4;
  --color-primary-mid:   #f0b4c8;
  --color-green:         #1e4020;
  --color-green-mid:     #4a7c59;
  --color-gold:          #b8860b;
  --color-bg:            #fdf8f2;
  --color-surface:       #ffffff;
  --color-text:          #1a1208;
  --color-muted:         #8a7265;
  --color-border:        #ecddd4;
  --color-correct:       #2d7a4f;
  --color-incorrect:     #c0392b;
  --color-correct-bg:    #edf7f2;
  --color-incorrect-bg:  #fef2f2;

  --font-heading: 'Zen Maru Gothic', sans-serif;
  --font-body:    'Noto Sans JP', sans-serif;

  --radius-sm: 10px;
  --radius:    16px;
  --radius-lg: 24px;
  --shadow-sm: 0 1px 4px rgba(60, 20, 10, 0.06);
  --shadow-md: 0 4px 16px rgba(60, 20, 10, 0.10);
  --shadow-lg: 0 8px 32px rgba(60, 20, 10, 0.14);
}

/* ===== RESET ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { height: 100%; }

/* ===== BODY — washi cream + sakura dot texture ===== */
body {
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  background-image: radial-gradient(circle, rgba(200, 90, 124, 0.07) 1px, transparent 1px);
  background-size: 28px 28px;
  min-height: 100dvh;
  -webkit-font-smoothing: antialiased;
}

/* ===== APP CONTAINER ===== */
#app {
  max-width: 720px;
  margin: 0 auto;
  min-height: 100dvh;
  padding-bottom: calc(112px + env(safe-area-inset-bottom));
  position: relative;
  background-color: transparent;
}

/* ===== BOTTOM NAV — floating dark green pill ===== */
#bottom-nav {
  position: fixed;
  bottom: calc(20px + env(safe-area-inset-bottom));
  left: 50%;
  transform: translateX(-50%);
  width: calc(100% - 32px);
  max-width: 440px;
  background: var(--color-green);
  border-radius: 28px;
  padding: 6px;
  display: flex;
  justify-content: space-around;
  align-items: center;
  box-shadow: 0 8px 32px rgba(30, 64, 32, 0.45), 0 2px 8px rgba(0, 0, 0, 0.12);
  z-index: 100;
}

#bottom-nav[hidden] { display: none; }

#bottom-nav button {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  padding: 10px 14px;
  border-radius: 22px;
  background: none;
  border: none;
  color: rgba(255, 255, 255, 0.45);
  font-size: 10px;
  font-family: var(--font-body);
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
  flex: 1;
  letter-spacing: 0.02em;
}

#bottom-nav button i {
  font-size: 22px;
  line-height: 1;
}

#bottom-nav button.active {
  background: var(--color-primary);
  color: #ffffff;
  box-shadow: 0 4px 16px rgba(200, 90, 124, 0.5);
}

/* ===== SCREEN LAYOUT ===== */
.screen { min-height: 100dvh; }

.screen-header {
  position: sticky;
  top: 0;
  background: rgba(253, 248, 242, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: 14px 20px 12px;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  z-index: 50;
}

.screen-title {
  font-family: var(--font-heading);
  font-size: 20px;
  color: var(--color-green);
  font-weight: 400;
  letter-spacing: 0.04em;
}

.session-header {
  position: sticky;
  top: 0;
  background: rgba(253, 248, 242, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: 12px 20px;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  color: var(--color-muted);
  z-index: 50;
}

.section { padding: 16px; }
.divider { height: 1px; background: var(--color-border); margin: 0 16px; }

/* ===== CARD ===== */
.card {
  background: var(--color-surface);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
}

/* ===== BUTTONS ===== */
.btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 15px 24px;
  border-radius: 100px;
  border: none;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  text-align: center;
  text-decoration: none;
  transition: all 0.2s ease;
  letter-spacing: 0.02em;
}

.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none !important; }

.btn-primary {
  background: var(--color-primary);
  color: #ffffff;
  box-shadow: 0 4px 16px rgba(200, 90, 124, 0.35);
}
.btn-primary:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(200, 90, 124, 0.45);
}
.btn-primary:active:not(:disabled) {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(200, 90, 124, 0.3);
}

.btn-secondary {
  background: transparent;
  color: var(--color-green);
  border: 2px solid rgba(30, 64, 32, 0.25);
}
.btn-secondary:hover:not(:disabled) { background: rgba(30, 64, 32, 0.05); }

.btn-ghost {
  display: inline-flex;
  align-items: center;
  width: auto;
  padding: 6px 14px;
  border-radius: 100px;
  background: none;
  border: 1.5px solid var(--color-border);
  color: var(--color-muted);
  font-size: 12px;
  font-family: var(--font-body);
  cursor: pointer;
  transition: all 0.2s ease;
}
.btn-ghost:hover { border-color: var(--color-primary); color: var(--color-primary); }

/* ===== FORMS ===== */
.form-group { margin-bottom: 18px; }

.form-label {
  display: block;
  font-size: 12px;
  color: var(--color-muted);
  margin-bottom: 8px;
  letter-spacing: 0.04em;
}

.form-input {
  width: 100%;
  padding: 12px 14px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--color-text);
  background: var(--color-surface);
  transition: border-color 0.2s, box-shadow 0.2s;
  -webkit-appearance: none;
}
.form-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(200, 90, 124, 0.12);
}

select.form-input {
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24'%3E%3Cpath fill='%238a7265' d='M7 10l5 5 5-5z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}

/* ===== GENDER OPTIONS ===== */
.gender-options { display: flex; gap: 10px; }

.gender-option {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 13px 8px;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--color-border);
  background: var(--color-surface);
  cursor: pointer;
  font-size: 14px;
  transition: all 0.2s ease;
  color: var(--color-text);
}
.gender-option:has(input:checked) {
  background: var(--color-primary-light);
  border-color: var(--color-primary);
  color: var(--color-primary);
  font-weight: 700;
}
.gender-option:has(input:focus-visible) { outline: 2px solid var(--color-primary); outline-offset: 2px; }
.gender-option input[type=radio] { position: absolute; width: 1px; height: 1px; opacity: 0; pointer-events: none; }

/* ===== MODE TABS ===== */
.mode-tabs {
  display: flex;
  gap: 8px;
  padding: 12px 16px;
  overflow-x: auto;
  scrollbar-width: none;
}
.mode-tabs::-webkit-scrollbar { display: none; }

.mode-tab {
  flex-shrink: 0;
  padding: 8px 18px;
  border-radius: 100px;
  border: 1.5px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-muted);
  font-size: 13px;
  font-family: var(--font-body);
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}
.mode-tab.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #ffffff;
  box-shadow: 0 2px 8px rgba(200, 90, 124, 0.3);
}

/* ===== CATEGORY CHECKBOXES ===== */
.category-grid { display: flex; flex-wrap: wrap; gap: 8px; }

.category-check {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border-radius: 100px;
  border: 1.5px solid var(--color-border);
  background: var(--color-surface);
  cursor: pointer;
  font-size: 13px;
  transition: all 0.2s ease;
  color: var(--color-text);
}
.category-check:has(input:checked) {
  background: var(--color-primary-light);
  border-color: var(--color-primary);
  color: var(--color-primary);
}
.category-check:has(input:focus-visible) { outline: 2px solid var(--color-primary); outline-offset: 2px; }
.category-check input[type=checkbox] { position: absolute; width: 1px; height: 1px; opacity: 0; pointer-events: none; }

/* ===== PROGRESS BAR ===== */
.progress-bar {
  height: 5px;
  background: var(--color-primary-light);
  border-radius: 100px;
  overflow: hidden;
}
.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary) 0%, #e8609a 100%);
  border-radius: 100px;
  transition: width 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ===== TIMER ===== */
.timer {
  font-family: var(--font-heading);
  font-size: 17px;
  color: var(--color-green);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.05em;
}
.timer.warning {
  color: var(--color-incorrect);
  animation: blink 1s ease infinite;
}
@keyframes blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.5; }
}

/* ===== CHOICE BUTTONS ===== */
.choice-btn {
  display: block;
  width: 100%;
  text-align: left;
  padding: 14px 16px;
  margin-bottom: 10px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.65;
  cursor: pointer;
  transition: all 0.15s ease;
  color: var(--color-text);
  box-shadow: var(--shadow-sm);
}
.choice-btn:hover:not(:disabled) {
  border-color: var(--color-primary-mid);
  background: var(--color-primary-light);
  transform: translateX(3px);
}
.choice-btn:disabled { cursor: default; }
.choice-btn.correct   { background: var(--color-correct-bg);   border-color: var(--color-correct);   color: var(--color-correct); }
.choice-btn.incorrect { background: var(--color-incorrect-bg); border-color: var(--color-incorrect); color: var(--color-incorrect); }

/* ===== ANSWER MARK ===== */
.answer-mark {
  font-family: var(--font-heading);
  font-size: 72px;
  font-weight: 400;
  line-height: 1;
  display: block;
  text-align: center;
}
.answer-mark.correct   { color: var(--color-correct); }
.answer-mark.incorrect { color: var(--color-incorrect); }

/* ===== HOME SCREEN ===== */
.home-hero {
  text-align: center;
  padding: 64px 20px 52px;
  /* フルブリード：コンテナを突き破って画面幅いっぱいに */
  width: 100vw;
  margin-left: calc(50% - 50vw);
  background:
    /* 鹿の子絞り風ドット（千鳥配置） */
    radial-gradient(circle, rgba(200, 90, 124, 0.28) 2.5px, transparent 2.5px) 0 0 / 18px 18px,
    radial-gradient(circle, rgba(200, 90, 124, 0.18) 2.5px, transparent 2.5px) 9px 9px / 18px 18px,
    /* 下地グラデーション */
    radial-gradient(ellipse at 15% 20%, rgba(200, 90, 124, 0.18) 0%, transparent 55%),
    radial-gradient(ellipse at 85% 80%, rgba(74, 124, 89, 0.12)  0%, transparent 50%),
    linear-gradient(155deg, #fce8f0 0%, #fdf8f2 55%, #eef5ee 100%);
  border-bottom: 1px solid var(--color-border);
  position: relative;
  overflow: hidden;
}
/* ぼんぼり風ソフトグロー装飾 */
.home-hero::before {
  content: '';
  position: absolute;
  top: -80px; left: -80px;
  width: 320px; height: 320px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(200, 90, 124, 0.18) 0%, transparent 70%);
  pointer-events: none;
}
.home-hero::after {
  content: '';
  position: absolute;
  bottom: -100px; right: -80px;
  width: 300px; height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(74, 124, 89, 0.14) 0%, transparent 70%);
  pointer-events: none;
}
.home-hero-title {
  font-family: var(--font-heading);
  font-size: 28px;
  color: var(--color-green);
  font-weight: 900;
  letter-spacing: 0.06em;
  position: relative;
  z-index: 1;
}
.home-hero-sub {
  font-size: 13px;
  color: var(--color-muted);
  margin-top: 10px;
  letter-spacing: 0.04em;
  position: relative;
  z-index: 1;
}
.home-main-card {
  text-align: center;
  padding: 32px 24px 28px;
  position: relative;
  overflow: hidden;
}
.home-main-card::before {
  content: '';
  position: absolute;
  top: -40px;
  right: -40px;
  width: 140px;
  height: 140px;
  border-radius: 50%;
  background: var(--color-primary-light);
  opacity: 0.7;
  pointer-events: none;
}
.home-main-card::after {
  content: '';
  position: absolute;
  bottom: -30px;
  left: -30px;
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: rgba(30, 64, 32, 0.05);
  pointer-events: none;
}
.home-greeting {
  font-family: var(--font-heading);
  font-size: 18px;
  color: var(--color-green);
  line-height: 1.55;
  margin-bottom: 8px;
  position: relative;
  z-index: 1;
}

/* ===== UTILITIES ===== */
.text-center { text-align: center; }
.mt-8  { margin-top:  8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }