/* ============================================
   楽天ポイント診断アプリ - Design System
   ============================================ */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Zen+Maru+Gothic:wght@400;500;700;900&display=swap');

/* --- CSS Variables --- */
:root {
  /* Colors */
  --bg-gradient-start: #fce4ec;
  --bg-gradient-mid: #f8bbd0;
  --bg-gradient-end: #e1bee7;
  --card-bg: rgba(255, 255, 255, 0.75);
  --card-bg-hover: rgba(255, 255, 255, 0.9);
  --card-border: rgba(255, 255, 255, 0.5);
  --accent: #B76E79;
  --accent-light: #d4979f;
  --accent-dark: #8e4f58;
  --text-primary: #3d2c2e;
  --text-secondary: #6d5557;
  --text-muted: #9e8486;
  --lavender: #c5b3e6;
  --lavender-light: #ede7f6;
  --coral: #f48fb1;
  --coral-deep: #e91e63;
  --gold-soft: #f0c987;
  --success: #81c784;
  --white: #ffffff;

  /* Typography */
  --font-family: 'Zen Maru Gothic', 'Hiragino Maru Gothic Pro', 'BIZ UDGothic', sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: 2rem;
  --font-size-3xl: 2.5rem;
  --font-size-4xl: 3.5rem;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;

  /* Border Radius */
  --radius-sm: 12px;
  --radius-md: 16px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 50%;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(183, 110, 121, 0.1);
  --shadow-md: 0 4px 20px rgba(183, 110, 121, 0.15);
  --shadow-lg: 0 8px 40px rgba(183, 110, 121, 0.2);
  --shadow-glow: 0 0 30px rgba(183, 110, 121, 0.3);

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
}

/* --- Reset & Base --- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family);
  color: var(--text-primary);
  background: linear-gradient(135deg, var(--bg-gradient-start) 0%, var(--bg-gradient-mid) 50%, var(--bg-gradient-end) 100%);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-lg);
  overflow-x: hidden;
}

/* Animated background blobs */
body::before,
body::after {
  content: '';
  position: fixed;
  border-radius: var(--radius-full);
  filter: blur(80px);
  opacity: 0.4;
  z-index: -1;
  animation: float 8s ease-in-out infinite;
}

body::before {
  width: 300px;
  height: 300px;
  background: var(--coral);
  top: -50px;
  right: -50px;
}

body::after {
  width: 250px;
  height: 250px;
  background: var(--lavender);
  bottom: -30px;
  left: -30px;
  animation-delay: -4s;
}

/* --- App Container --- */
.app-container {
  width: 100%;
  max-width: 480px;
  position: relative;
}

/* --- Header --- */
.app-header {
  text-align: center;
  margin-bottom: var(--space-xl);
  animation: fadeInDown 0.8s ease;
}

.app-header__emoji {
  font-size: var(--font-size-4xl);
  display: block;
  margin-bottom: var(--space-sm);
  animation: bounce 2s ease-in-out infinite;
}

.app-header__title {
  font-size: var(--font-size-xl);
  font-weight: 900;
  color: var(--accent-dark);
  line-height: 1.4;
  letter-spacing: 0.02em;
}

.app-header__subtitle {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin-top: var(--space-xs);
  font-weight: 500;
}

/* --- Card --- */
.card {
  background: var(--card-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-lg);
}

/* --- Step Indicator --- */
.step-indicator {
  display: flex;
  justify-content: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-xl);
}

.step-dot {
  width: 12px;
  height: 12px;
  border-radius: var(--radius-full);
  background: var(--bg-gradient-mid);
  transition: all var(--transition-base);
  position: relative;
}

.step-dot.active {
  background: var(--accent);
  width: 36px;
  border-radius: 6px;
  box-shadow: 0 0 12px rgba(183, 110, 121, 0.4);
}

.step-dot.completed {
  background: var(--success);
}

/* --- Step Screens --- */
.step-screen {
  display: none;
  animation: fadeInUp 0.5s ease;
}

.step-screen.active {
  display: block;
}

.step-question {
  font-size: var(--font-size-lg);
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--space-xl);
  color: var(--text-primary);
  line-height: 1.6;
}

/* --- Slider (Step 1) --- */
.slider-container {
  text-align: center;
  padding: var(--space-md) 0;
}

.amount-display {
  font-size: var(--font-size-3xl);
  font-weight: 900;
  color: var(--accent);
  margin-bottom: var(--space-lg);
  transition: transform var(--transition-fast);
}

.amount-display span {
  font-size: var(--font-size-lg);
  font-weight: 500;
  color: var(--text-secondary);
}

.slider-wrapper {
  position: relative;
  padding: var(--space-md) 0;
}

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 8px;
  border-radius: 4px;
  background: linear-gradient(to right, var(--bg-gradient-mid), var(--accent));
  outline: none;
  cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background: var(--white);
  border: 3px solid var(--accent);
  box-shadow: var(--shadow-md);
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.15);
  box-shadow: var(--shadow-glow);
}

input[type="range"]::-moz-range-thumb {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background: var(--white);
  border: 3px solid var(--accent);
  box-shadow: var(--shadow-md);
  cursor: pointer;
}

.slider-labels {
  display: flex;
  justify-content: space-between;
  font-size: var(--font-size-xs);
  color: var(--text-muted);
  margin-top: var(--space-sm);
  font-weight: 500;
}

/* --- Service Toggles (Step 2) --- */
.service-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.service-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-lg);
  background: var(--white);
  border-radius: var(--radius-md);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-base);
  user-select: none;
}

.service-item:hover {
  border-color: var(--accent-light);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.service-item.selected {
  border-color: var(--accent);
  background: linear-gradient(135deg, rgba(183, 110, 121, 0.08), rgba(197, 179, 230, 0.08));
  box-shadow: var(--shadow-sm);
}

.service-item__info {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.service-item__emoji {
  font-size: var(--font-size-xl);
  width: 40px;
  text-align: center;
}

.service-item__name {
  font-size: var(--font-size-base);
  font-weight: 700;
  color: var(--text-primary);
}

.service-item__bonus {
  font-size: var(--font-size-xs);
  color: var(--accent);
  font-weight: 700;
  background: rgba(183, 110, 121, 0.1);
  padding: 2px 8px;
  border-radius: 20px;
}

/* Toggle Switch */
.toggle-switch {
  position: relative;
  width: 48px;
  height: 28px;
  flex-shrink: 0;
}

.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #e0d4d5;
  border-radius: 28px;
  transition: var(--transition-base);
}

.toggle-slider::before {
  content: '';
  position: absolute;
  height: 22px;
  width: 22px;
  left: 3px;
  bottom: 3px;
  background-color: var(--white);
  border-radius: var(--radius-full);
  transition: var(--transition-base);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.1);
}

.toggle-switch input:checked+.toggle-slider {
  background: linear-gradient(135deg, var(--accent), var(--coral));
}

.toggle-switch input:checked+.toggle-slider::before {
  transform: translateX(20px);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  border: none;
  border-radius: var(--radius-xl);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.2), transparent);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.btn:hover::after {
  opacity: 1;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--coral));
  color: var(--white);
  box-shadow: 0 4px 15px rgba(183, 110, 121, 0.4);
  width: 100%;
  padding: var(--space-lg);
  font-size: var(--font-size-lg);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(183, 110, 121, 0.5);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background: var(--white);
  color: var(--accent);
  border: 2px solid var(--accent-light);
}

.btn-secondary:hover {
  border-color: var(--accent);
  background: rgba(183, 110, 121, 0.05);
}

.btn-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin-top: var(--space-xl);
}

/* --- Results Screen --- */
.result-screen {
  display: none;
  text-align: center;
  animation: fadeInUp 0.6s ease;
}

.result-screen.active {
  display: block;
}

.result-label {
  font-size: var(--font-size-base);
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: var(--space-sm);
}

.result-points {
  font-size: var(--font-size-4xl);
  font-weight: 900;
  color: var(--accent-dark);
  line-height: 1.2;
  margin-bottom: var(--space-xs);
}

.result-points-unit {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--accent);
}

.result-per-year {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
  margin-bottom: var(--space-xl);
}

/* Rakumaji Upgrade Box */
.rakumaji-box {
  background: linear-gradient(135deg, rgba(183, 110, 121, 0.1), rgba(197, 179, 230, 0.12));
  border: 2px solid var(--accent-light);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  margin: var(--space-xl) 0;
  position: relative;
  overflow: hidden;
}

.rakumaji-box::before {
  content: '✨';
  position: absolute;
  top: -5px;
  right: 10px;
  font-size: 24px;
  animation: sparkle 2s ease-in-out infinite;
}

.rakumaji-box__label {
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--accent);
  margin-bottom: var(--space-sm);
}

.rakumaji-box__points {
  font-size: var(--font-size-2xl);
  font-weight: 900;
  color: var(--accent-dark);
}

.rakumaji-box__diff {
  font-size: var(--font-size-sm);
  color: var(--coral-deep);
  font-weight: 700;
  margin-top: var(--space-xs);
}

/* Rate badge display */
.rate-display {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  background: rgba(183, 110, 121, 0.1);
  padding: var(--space-xs) var(--space-md);
  border-radius: 20px;
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--accent);
  margin-bottom: var(--space-lg);
}

/* --- Share Buttons --- */
.share-section {
  margin-top: var(--space-xl);
}

.share-section__title {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
  margin-bottom: var(--space-md);
}

.share-buttons {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
}

.share-btn {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-xl);
  cursor: pointer;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-sm);
}

.share-btn:hover {
  transform: translateY(-3px) scale(1.05);
  box-shadow: var(--shadow-md);
}

.share-btn--x {
  background: #1a1a2e;
  color: var(--white);
}

.share-btn--line {
  background: #06c755;
  color: var(--white);
}

.share-btn--copy {
  background: var(--white);
  color: var(--accent);
  border: 2px solid var(--accent-light);
}

/* Instagram Link */
.instagram-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  margin-top: var(--space-lg);
  color: var(--accent);
  font-weight: 700;
  font-size: var(--font-size-sm);
  text-decoration: none;
  transition: color var(--transition-base);
}

.instagram-link:hover {
  color: var(--accent-dark);
}

/* --- Footer --- */
.app-footer {
  text-align: center;
  margin-top: var(--space-2xl);
  font-size: var(--font-size-xs);
  color: var(--text-muted);
}

.app-footer a {
  color: var(--accent);
  text-decoration: none;
}

/* --- Confetti Canvas --- */
#confetti-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 100;
}

/* --- Toast notification --- */
.toast {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--text-primary);
  color: var(--white);
  padding: var(--space-md) var(--space-xl);
  border-radius: var(--radius-xl);
  font-size: var(--font-size-sm);
  font-weight: 700;
  font-family: var(--font-family);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  transition: all var(--transition-base);
  z-index: 200;
}

.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* ============================================
   Animations
   ============================================ */

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes bounce {

  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-8px);
  }
}

@keyframes float {

  0%,
  100% {
    transform: translate(0, 0) scale(1);
  }

  33% {
    transform: translate(20px, -20px) scale(1.05);
  }

  66% {
    transform: translate(-15px, 15px) scale(0.95);
  }
}

@keyframes sparkle {

  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }

  50% {
    opacity: 0.6;
    transform: scale(1.2);
  }
}

@keyframes pulse {

  0%,
  100% {
    transform: scale(1);
  }

  50% {
    transform: scale(1.03);
  }
}

@keyframes countUp {
  from {
    opacity: 0;
    transform: scale(0.5);
  }

  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* ============================================
   Responsive
   ============================================ */

@media (max-width: 480px) {
  body {
    padding: var(--space-md);
  }

  .card {
    padding: var(--space-lg);
  }

  .amount-display {
    font-size: var(--font-size-2xl);
  }

  .result-points {
    font-size: var(--font-size-3xl);
  }

  .service-item {
    padding: var(--space-sm) var(--space-md);
  }

  .service-item__emoji {
    font-size: var(--font-size-lg);
    width: 32px;
  }

  .service-item__name {
    font-size: var(--font-size-sm);
  }
}

@media (min-width: 481px) and (max-width: 768px) {
  .app-container {
    max-width: 520px;
  }
}

@media (min-width: 769px) {
  body {
    padding: var(--space-3xl);
  }

  .app-container {
    max-width: 540px;
  }
}

/* --- Disclaimer --- */
.disclaimer {
  margin-top: var(--space-xl);
  padding: var(--space-md) var(--space-lg);
  background: rgba(183, 110, 121, 0.06);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--accent-light);
}

.disclaimer p {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
  line-height: 1.7;
}

.disclaimer a {
  color: var(--accent);
  text-decoration: underline;
  font-weight: 700;
}

.disclaimer a:hover {
  color: var(--accent-dark);
}