/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6em;
  padding: 0.95em 2.1em;
  border-radius: 999px;
  font-size: var(--fs-small);
  letter-spacing: 0.04em;
  transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease), background 0.4s var(--ease), border-color 0.4s var(--ease);
}

.btn-primary {
  background: linear-gradient(135deg, var(--c-gold-light) 0%, var(--c-gold) 55%, var(--c-gold-deep) 100%);
  color: var(--c-black);
  font-weight: 600;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(198, 168, 104, 0.28);
}

/* ホワイトペーパーボタン: 黒背景+ゴールド枠+ゴールドアイコン */
.btn-ghost {
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--c-card-border);
  color: var(--c-gold-light);
  font-weight: 500;
}

.btn-ghost:hover {
  transform: translateY(-2px);
  border-color: var(--c-gold);
  background: rgba(var(--c-gold-rgb), 0.08);
  box-shadow: 0 12px 28px -12px rgba(0, 0, 0, 0.6);
}

.btn-ghost .btn-icon {
  color: var(--c-gold);
}

/* Glass card (参照デザイン準拠:薄いゴールド枠+強めのブラー+高級感シャドウ) */
.glass-card {
  background: var(--c-card-bg);
  border: 1px solid var(--c-card-border);
  border-radius: var(--radius);
  backdrop-filter: blur(var(--blur-glass));
  -webkit-backdrop-filter: blur(var(--blur-glass));
  box-shadow: var(--c-card-shadow);
  padding: var(--sp-md);
  transition: transform 0.5s var(--ease), box-shadow 0.5s var(--ease), border-color 0.5s var(--ease);
}

.glass-card:hover {
  transform: translateY(-4px);
  border-color: rgba(var(--c-gold-rgb), 0.5);
  box-shadow: 0 28px 70px -20px rgba(0, 0, 0, 0.7), 0 0 0 1px rgba(var(--c-gold-rgb), 0.12) inset;
}

/* 高級感のあるシマー(光の帯)演出。カード共通で使用可能なユーティリティ */
.glass-card,
.feature-card,
.problem-card,
.hero-feature-card {
  position: relative;
  overflow: hidden;
}

.glass-card::before,
.feature-card::before,
.problem-card::before,
.hero-feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: -60%;
  width: 40%;
  height: 100%;
  background: linear-gradient(120deg, transparent, rgba(var(--c-gold-rgb), 0.09), transparent);
  transform: skewX(-20deg);
  transition: left 0.9s var(--ease);
  pointer-events: none;
}

.glass-card:hover::before,
.feature-card:hover::before,
.problem-card:hover::before,
.hero-feature-card:hover::before {
  left: 130%;
}

@media (prefers-reduced-motion: reduce) {
  .glass-card::before,
  .feature-card::before,
  .problem-card::before,
  .hero-feature-card::before {
    display: none;
  }
}

/* Badge */
.badge {
  display: inline-block;
  font-family: var(--f-num);
  font-size: var(--fs-small);
  color: var(--c-gold-light);
  border: 1px solid var(--c-line);
  border-radius: 999px;
  padding: 0.35em 1em;
}

/* Hairline signature thread */
.gold-thread {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  overflow: visible;
}

.gold-thread path {
  fill: none;
  stroke: var(--c-gold);
  stroke-width: 1;
  opacity: 0.55;
  stroke-dasharray: 1;
  stroke-dashoffset: 1;
  vector-effect: non-scaling-stroke;
}

/* Divider */
.hr-gold {
  height: 1px;
  width: 100%;
  background: linear-gradient(90deg, transparent, var(--c-line), transparent);
  border: none;
}

/* Stat */
.stat {
  display: flex;
  flex-direction: column;
  gap: 0.35em;
}

.stat .num {
  font-family: var(--f-num);
  font-size: clamp(1.6rem, 4vw, 2.3rem);
  font-weight: 600;
  color: var(--c-gold-light);
}

.stat .label {
  font-size: var(--fs-small);
  color: var(--c-gray);
}

/* Reveal utility (JS toggles .is-visible) */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.9s var(--ease), transform 0.9s var(--ease);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.08s; }
.reveal-delay-2 { transition-delay: 0.16s; }
.reveal-delay-3 { transition-delay: 0.24s; }

/* Accordion (FAQ) */
.accordion-item {
  border-bottom: 1px solid var(--c-line);
}

.accordion-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-sm);
  padding: 1.4em 0;
  text-align: left;
  font-family: var(--f-serif);
  font-size: var(--fs-h3);
  color: var(--c-white);
}

.accordion-trigger .icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  position: relative;
}

.accordion-trigger .icon::before,
.accordion-trigger .icon::after {
  content: "";
  position: absolute;
  background: var(--c-gold);
  transition: transform 0.4s var(--ease);
}

.accordion-trigger .icon::before {
  left: 0;
  top: 50%;
  width: 100%;
  height: 1px;
  transform: translateY(-50%);
}

.accordion-trigger .icon::after {
  top: 0;
  left: 50%;
  width: 1px;
  height: 100%;
  transform: translateX(-50%);
}

.accordion-item.is-open .accordion-trigger .icon::after {
  transform: translateX(-50%) rotate(90deg);
  opacity: 0;
}

.accordion-panel {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.5s var(--ease);
}

.accordion-panel p {
  padding-bottom: 1.6em;
  color: var(--c-gray);
  max-width: 60ch;
}

/* Image frame */
.img-frame {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--c-glass-border);
}

/* Table (simulation) */
.table-simple {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--fs-small);
}

.table-simple th,
.table-simple td {
  padding: 0.85em 1em;
  text-align: left;
  border-bottom: 1px solid var(--c-line);
}

.table-simple th {
  color: var(--c-gold-light);
  font-weight: 500;
  font-family: var(--f-num);
  letter-spacing: 0.03em;
}

.table-simple td {
  color: var(--c-gray);
}

/* Note / disclaimer box */
.note-box {
  border: 1px solid var(--c-line);
  border-left: 2px solid var(--c-gold);
  border-radius: var(--radius-sm);
  padding: var(--sp-sm) var(--sp-md);
  font-size: var(--fs-small);
  color: var(--c-gray);
  background: rgba(198, 168, 104, 0.04);
}

/* LINE color button (LINEボタンのみLINEグリーンの使用を許可) */
.btn-line {
  background: var(--c-line-green);
  color: #fff;
  font-weight: 600;
  box-shadow: 0 10px 26px -10px rgba(6, 199, 85, 0.45);
}

.btn-line:hover {
  background: var(--c-line-green-dark);
  transform: translateY(-2px);
  box-shadow: 0 16px 34px -10px rgba(6, 199, 85, 0.55);
}

.btn-line.btn-lg {
  padding: 1.1em 2.2em;
  font-size: 1rem;
}

.btn-line .line-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.18);
  flex-shrink: 0;
}

.btn-line .line-icon svg {
  width: 14px;
  height: 14px;
}

.btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.btn-icon svg {
  width: 16px;
  height: 16px;
}

/* ===== ハンバーガーメニュー ===== */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  z-index: 210;
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 1px;
  background: var(--c-white);
  transition: transform 0.35s var(--ease), opacity 0.35s var(--ease);
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.nav-overlay {
  position: fixed;
  inset: 0;
  background: rgba(5, 5, 6, 0.6);
  backdrop-filter: blur(2px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s var(--ease);
  z-index: 90;
}

.nav-overlay.is-visible {
  opacity: 1;
  pointer-events: auto;
}

/* ===== スマホ固定LINE CTAバー ===== */
.mobile-sticky-cta {
  display: none;
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 150;
  padding: 0.7rem var(--sp-md) calc(0.7rem + env(safe-area-inset-bottom, 0px));
  background: rgba(10, 10, 12, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-top: 1px solid var(--c-line);
  transform: translateY(100%);
  transition: transform 0.4s var(--ease);
}

.mobile-sticky-cta.is-visible {
  transform: translateY(0);
}

.mobile-sticky-cta .btn {
  width: 100%;
}

@media (max-width: 767px) {
  .mobile-sticky-cta {
    display: block;
  }
}

/* ===== シミュレーター ===== */
.simulator-card {
  display: grid;
  gap: var(--sp-md);
  grid-template-columns: 1fr;
}

@media (min-width: 768px) {
  .simulator-card {
    grid-template-columns: 1fr 1fr;
  }
}

.sim-field {
  display: flex;
  flex-direction: column;
  gap: 0.5em;
}

.sim-field label {
  font-size: var(--fs-small);
  color: var(--c-gray);
}

.sim-field input {
  font-family: var(--f-num);
  font-size: 1.1rem;
  color: var(--c-white);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-sm);
  padding: 0.7em 0.9em;
  width: 100%;
}

.sim-field input:focus {
  outline: none;
  border-color: var(--c-gold);
}

.sim-field input[readonly] {
  color: var(--c-gold-light);
  background: rgba(198, 168, 104, 0.06);
  cursor: default;
}

.sim-field input[readonly]:focus {
  border-color: var(--c-line);
}

.sim-results {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-sm);
  margin-top: var(--sp-sm);
  padding-top: var(--sp-md);
  border-top: 1px solid var(--c-line);
}

.sim-results .stat .num {
  font-size: clamp(1.3rem, 3.6vw, 1.8rem);
}

/* ===== QRエリア ===== */
.qr-display {
  width: 132px;
  height: 132px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--c-glass-border);
  background: rgba(255, 255, 255, 0.02);
}

@media (max-width: 640px) {
  .qr-display-wrap {
    display: none;
  }
}

/* ===== Feature card (AmirWalletの特徴) ===== */
.feature-card {
  padding: var(--sp-md);
  border: 1px solid var(--c-card-border);
  border-radius: var(--radius);
  background: var(--c-card-bg);
  backdrop-filter: blur(var(--blur-glass));
  -webkit-backdrop-filter: blur(var(--blur-glass));
  box-shadow: var(--c-card-shadow);
  transition: transform 0.5s var(--ease), box-shadow 0.5s var(--ease), border-color 0.5s var(--ease);
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: rgba(var(--c-gold-rgb), 0.55);
  box-shadow: 0 30px 70px -20px rgba(0, 0, 0, 0.7), 0 0 0 1px rgba(var(--c-gold-rgb), 0.15) inset;
}

.feature-card .feature-icon {
  width: 34px;
  height: 34px;
  color: var(--c-gold);
  margin-bottom: 0.7em;
}

.feature-card .feature-num {
  font-family: var(--f-num);
  font-size: var(--fs-small);
  color: var(--c-gold);
  letter-spacing: 0.08em;
}

.feature-card h3 {
  margin-top: 0.5em;
  font-size: var(--fs-h3);
}

.feature-card p {
  margin-top: 0.5em;
  font-size: var(--fs-small);
  color: var(--c-gray);
}

.feature-card .feature-note {
  margin-top: 0.6em;
  font-size: 0.78rem;
  color: var(--c-gray-dim);
  border-top: 1px solid var(--c-line);
  padding-top: 0.6em;
}

/* 想定APYの数値(カウントアップ表示)にゴールドグラデーションを適用 */
.count-up {
  background: linear-gradient(100deg, var(--c-gold-deep) 0%, var(--c-gold-light) 50%, var(--c-gold) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: var(--c-gold-light);
}