:root {
  --color-primary: #7DCA7E;
  --color-primary-dark: #5eb05f;
  --color-primary-glow: rgba(125, 202, 126, 0.25);
  --color-bg: #121212;
  --color-bg-card: #1c1c1c;
  --color-bg-card-hover: #262626;
  --color-text-main: #FFFFFF;
  --color-text-sub: #F0F0F0;
  --color-text-muted: #B8B8B8;
  --color-border: rgba(255, 255, 255, 0.12);
  --color-border-active: #7DCA7E;
  --font-heading: 'Outfit', 'Noto Sans JP', sans-serif;
  --font-body: 'Noto Sans JP', 'Inter', sans-serif;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --shadow-card: 0 10px 30px rgba(0, 0, 0, 0.5);
}

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

body {
  background-color: var(--color-bg);
  color: var(--color-text-sub);
  font-family: var(--font-body);
  line-height: 1.6;
  padding: 24px 16px 60px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.container {
  width: 100%;
  max-width: 780px;
  margin: 0 auto;
}

/* Header */
.header {
  text-align: center;
  margin-bottom: 32px;
  position: relative;
}

.brand-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(18, 18, 18, 0.9);
  border: 1px solid var(--color-primary);
  padding: 7px 16px;
  border-radius: 999px;
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.brand-badge::before {
  content: '';
  display: inline-block;
  width: 9px;
  height: 9px;
  background-color: var(--color-primary);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--color-primary);
}

h1 {
  font-family: var(--font-heading);
  font-size: 2.1rem;
  font-weight: 900;
  color: var(--color-text-main);
  line-height: 1.25;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

h1 span.highlight {
  color: var(--color-primary);
}

.subtitle {
  font-size: 1.02rem;
  color: var(--color-text-sub);
  max-width: 620px;
  margin: 0 auto;
  line-height: 1.65;
}

/* System Status Bar */
.env-banner {
  background: rgba(125, 202, 126, 0.1);
  border: 1px solid rgba(125, 202, 126, 0.45);
  border-radius: var(--radius-md);
  padding: 14px 20px;
  margin-bottom: 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.95rem;
}

.env-info {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--color-text-main);
  font-weight: 600;
}

.env-tag {
  background: var(--color-primary);
  color: #000000;
  font-weight: 800;
  font-size: 0.82rem;
  padding: 3px 10px;
  border-radius: 4px;
  letter-spacing: 0.04em;
}

.env-note {
  font-size: 0.92rem;
  font-weight: 600;
  color: #7DCA7E;
  background: rgba(0, 0, 0, 0.4);
  padding: 4px 12px;
  border-radius: 6px;
  border: 1px solid rgba(125, 202, 126, 0.3);
}

/* Section Cards */
.step-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 22px 24px;
  margin-bottom: 18px;
  box-shadow: var(--shadow-card);
  transition: border-color 0.2s ease;
}

.step-card.active {
  border-color: rgba(125, 202, 126, 0.4);
}

.step-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.step-number {
  width: 32px;
  height: 32px;
  background: var(--color-primary);
  color: #000000;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1rem;
  font-family: var(--font-heading);
  flex-shrink: 0;
}

.step-title {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--color-text-main);
}

.step-desc {
  font-size: 0.9rem;
  font-weight: 500;
  color: #CCCCCC;
  margin-left: auto;
}

/* Grid Options */
.options-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
}

.options-grid.cols-3 {
  grid-template-columns: repeat(3, 1fr);
}

.options-grid.cols-4 {
  grid-template-columns: repeat(4, 1fr);
}

.option-btn {
  background: #161616;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 15px 10px;
  color: var(--color-text-sub);
  text-align: center;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 7px;
  position: relative;
  user-select: none;
}

.option-btn:hover {
  background: var(--color-bg-card-hover);
  border-color: rgba(255, 255, 255, 0.3);
  transform: translateY(-2px);
}

.option-btn.selected {
  background: rgba(125, 202, 126, 0.15);
  border-color: var(--color-primary);
  color: var(--color-text-main);
  box-shadow: 0 0 16px var(--color-primary-glow);
}

.option-btn .icon {
  font-size: 1.75rem;
  line-height: 1;
}

.option-btn .label {
  font-size: 1.02rem;
  font-weight: 800;
}

.option-btn .sub-label {
  font-size: 0.82rem;
  font-weight: 500;
  color: #C0C0C0;
  line-height: 1.35;
}

.option-btn.selected .sub-label {
  color: #7DCA7E;
  font-weight: 600;
}

/* Submit / Action Button */
.action-container {
  margin-top: 28px;
  text-align: center;
}

.btn-diagnose {
  background: var(--color-primary);
  color: #000000;
  border: none;
  border-radius: 999px;
  padding: 18px 44px;
  font-size: 1.15rem;
  font-weight: 800;
  font-family: var(--font-heading);
  cursor: pointer;
  box-shadow: 0 8px 24px var(--color-primary-glow);
  transition: all 0.25s ease;
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.btn-diagnose:hover {
  background: #8eec8f;
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 12px 32px rgba(125, 202, 126, 0.4);
}

.btn-diagnose:active {
  transform: translateY(0) scale(0.98);
}

/* Result Section */
#result-section {
  display: none;
  margin-top: 36px;
  animation: fadeIn 0.4s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(18px); }
  to { opacity: 1; transform: translateY(0); }
}

.result-card {
  background: #171717;
  border: 2px solid var(--color-primary);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.8), 0 0 30px var(--color-primary-glow);
}

.result-hero {
  background: linear-gradient(180deg, rgba(125, 202, 126, 0.18) 0%, rgba(23, 23, 23, 0) 100%);
  padding: 30px 24px 22px;
  text-align: center;
  border-bottom: 1px solid var(--color-border);
}

.pairing-badge {
  display: inline-block;
  background: var(--color-primary);
  color: #000000;
  font-weight: 800;
  font-size: 0.84rem;
  padding: 4px 14px;
  border-radius: 4px;
  letter-spacing: 0.05em;
  margin-bottom: 12px;
}

.result-title {
  font-size: 1.75rem;
  font-weight: 900;
  color: var(--color-text-main);
  line-height: 1.35;
  margin-bottom: 10px;
}

.result-tagline {
  font-size: 1rem;
  color: var(--color-text-sub);
}

.result-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* Sub Sections */
.info-block {
  background: #202020;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 18px 20px;
}

.info-block-header {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: 10px;
}

.info-block p {
  font-size: 0.95rem;
  color: var(--color-text-sub);
  line-height: 1.7;
}

/* Scene Fit Badge Block */
.scene-fit-block {
  background: rgba(125, 202, 126, 0.08);
  border: 1px solid rgba(125, 202, 126, 0.3);
}

.scene-fit-block .info-block-header {
  color: #FFFFFF;
}

.recipe-steps {
  margin-top: 10px;
  padding-left: 20px;
}

.recipe-steps li {
  font-size: 0.94rem;
  color: var(--color-text-sub);
  margin-bottom: 7px;
  line-height: 1.6;
}

.brew-spec-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-top: 12px;
}

.brew-spec-item {
  background: #141414;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  padding: 12px;
  text-align: center;
}

.brew-spec-label {
  font-size: 0.88rem;
  font-weight: 600;
  color: #C8C8C8;
  margin-bottom: 4px;
}

.brew-spec-val {
  font-size: 1.15rem;
  font-weight: 800;
  font-family: var(--font-heading);
  color: var(--color-primary);
}

/* Result Action Buttons */
.result-actions {
  display: flex;
  gap: 12px;
  margin-top: 8px;
}

.btn-secondary {
  flex: 1;
  background: #252525;
  color: var(--color-text-main);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 14px;
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.btn-secondary:hover {
  background: #333333;
  border-color: rgba(255, 255, 255, 0.3);
}

/* Footer */
.footer {
  margin-top: 48px;
  text-align: center;
  font-size: 0.9rem;
  color: #A0A0A0;
  line-height: 1.6;
}

/* Mobile adjustments */
@media (max-width: 680px) {
  h1 { font-size: 1.7rem; }
  .options-grid.cols-4 { grid-template-columns: repeat(2, 1fr); }
  .options-grid.cols-3 { grid-template-columns: 1fr; }
  .brew-spec-grid { grid-template-columns: 1fr; }
  .result-actions { flex-direction: column; }
}