:root {
  --color-primary:   #f97316;
  --color-primary-d: #ea580c;
  --color-blue:      #0054A6;
  --color-blue-d:    #003f80;
  --color-border:    #E4E7EB;
  --color-border-d:  #C8CDD3;
  --color-bg:        #F4F6F8;
  --color-bg-sub:    #EAEEF2;
  --color-white:     #FFFFFF;
  --color-text:      #1F2937;
  --color-text-sub:  #6B7280;
  --color-danger:    #DC2626;
  --color-danger-bg: #FEE2E2;
  --color-success:   #16A34A;

  --radius-btn:  6px;
  --radius-card: 10px;
  --radius-pill: 999px;
  --shadow-xs:   0 1px 2px rgba(15,23,42,0.06);
  --shadow-sm:   0 1px 3px rgba(15,23,42,0.08), 0 1px 2px rgba(15,23,42,0.04);
  --shadow-md:   0 4px 12px rgba(15,23,42,0.08);
  --shadow-lg:   0 12px 32px rgba(15,23,42,0.14);

  --font-base: 'Pretendard GOV Variable', 'Pretendard GOV', -apple-system, BlinkMacSystemFont, system-ui, 'Apple SD Gothic Neo', sans-serif;
  --font-logo: 'Do Hyeon', var(--font-base);

  --header-h: 60px;
  --cart-bar-h: 64px;
}

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

html { -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font-base);
  font-feature-settings: 'tnum' 1;
  background: var(--color-bg);
  color: var(--color-text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.material-icons-round { font-family: 'Material Icons Round'; font-style: normal; font-weight: normal; display: inline-block; line-height: 1; letter-spacing: normal; text-transform: none; white-space: nowrap; word-wrap: normal; direction: ltr; -webkit-font-feature-settings: 'liga'; -webkit-font-smoothing: antialiased; }

button, input, select, textarea {
  font-family: inherit;
  color: inherit;
}

button { cursor: pointer; }

.hidden { display: none !important; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

:focus-visible {
  outline: 2px solid var(--color-blue);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ── Header ── */
#main-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-blue);
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 14px;
  height: var(--header-h);
  box-shadow: var(--shadow-sm);
  gap: 10px;
  flex-shrink: 0;
}

#header-title {
  font-family: var(--font-logo);
  font-size: 1.3rem;
  letter-spacing: 0.02em;
  white-space: nowrap;
  user-select: none;
  cursor: pointer;
  color: var(--color-white);
  flex-shrink: 0;
}

/* 헤더 내 모든 아이콘 전용 정방형 버튼 (홈·사용법·장바구니) */
#btn-home,
#main-header nav > button {
  background: rgba(255,255,255,0.12);
  color: var(--color-white);
  border: 1px solid rgba(255,255,255,0.22);
  border-radius: var(--radius-btn);
  width: 40px;
  height: 40px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background 0.18s;
  flex-shrink: 0;
}

#btn-home:hover,
#main-header nav > button:hover { background: rgba(255,255,255,0.24); }

#btn-home[aria-current="page"],
#main-header nav > button[aria-current="page"] {
  background: rgba(255,255,255,0.3);
  border-color: rgba(255,255,255,0.6);
}

#btn-home .material-icons-round,
#main-header nav > button .material-icons-round { font-size: 22px; }

#main-header nav {
  display: flex;
  align-items: center;
  gap: 6px;
}

/* 장바구니 버튼 — badge 절대 위치 */
#nav-cart-btn {
  position: relative;
}

#cart-badge {
  position: absolute;
  top: -6px;
  right: -6px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary);
  color: white;
  border-radius: var(--radius-pill);
  min-width: 18px;
  height: 18px;
  padding: 0 4px;
  font-size: 0.68rem;
  font-weight: 800;
  border: 2px solid var(--color-blue);
  pointer-events: none;
}

/* ── Language Selector ── */
#lang-selector {
  position: relative;
}

#lang-btn {
  background: rgba(255,255,255,0.12);
  color: var(--color-white);
  border: 1px solid rgba(255,255,255,0.22);
  border-radius: var(--radius-btn);
  padding: 0 10px;
  height: 40px;
  font-size: 0.82rem;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  transition: background 0.18s;
}

#lang-btn:hover { background: rgba(255,255,255,0.24); }
#lang-btn .material-icons-round { font-size: 20px; }

#lang-btn .lang-label { font-size: 0.82rem; font-weight: 600; }

#lang-btn .caret {
  display: inline-block;
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 5px solid currentColor;
  transition: transform 0.2s;
}

#lang-btn[aria-expanded="true"] .caret {
  transform: rotate(180deg);
}

#lang-menu {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-lg);
  list-style: none;
  min-width: 180px;
  z-index: 200;
  overflow: hidden;
  padding: 4px;
}

#lang-menu li {
  padding: 10px 14px;
  cursor: pointer;
  color: var(--color-text);
  font-size: 0.92rem;
  border-radius: var(--radius-btn);
  transition: background 0.12s;
}

#lang-menu li:hover,
#lang-menu li:focus-visible { background: var(--color-bg-sub); }

#lang-menu li.active {
  background: rgba(0,84,166,0.08);
  color: var(--color-blue);
  font-weight: 700;
}

/* ── Pages ── */
.page {
  max-width: 1100px;
  width: 100%;
  margin: 0 auto;
  padding: 24px 16px 40px;
  flex: 1;
}

.page > h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 18px;
  color: var(--color-blue);
}

.section-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-text);
  margin: 24px 0 14px;
}

/* ── Carousel ── */
#carousel {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-card);
  margin-bottom: 8px;
  box-shadow: var(--shadow-md);
}

#carousel-track {
  display: flex;
  transition: transform 0.45s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  will-change: transform;
}

.slide {
  flex: 0 0 100%;
  min-height: 220px;
  display: flex;
  align-items: stretch;
  justify-content: stretch;
  user-select: none;
  cursor: pointer;
}

.slide-text-banner {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 36px 24px;
  text-align: center;
  transition: filter 0.2s;
}

.slide:hover .slide-text-banner,
.slide:focus-visible .slide-text-banner { filter: brightness(1.05); }

.slide-youtube {
  background: linear-gradient(135deg, #1565C0 0%, #1976D2 45%, #0288D1 100%);
  color: white;
}

.slide-info {
  background: linear-gradient(135deg, #0277BD 0%, #0288D1 55%, #26C6DA 100%);
  color: white;
}

.slide-dict {
  background: linear-gradient(135deg, #2E7D32 0%, #43A047 55%, #66BB6A 100%);
  color: white;
}

.slide-play-icon {
  font-size: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  background: rgba(255,255,255,0.18);
  border-radius: 50%;
  border: 2px solid rgba(255,255,255,0.45);
  font-weight: 700;
}

.slide-text-banner h2 {
  font-size: 1.6rem;
  font-weight: 700;
  color: white;
}

.slide-text-banner p {
  font-size: 1rem;
  color: rgba(255,255,255,0.88);
}

#carousel-prev,
#carousel-next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(0,0,0,0.4);
  color: white;
  border: none;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
  transition: background 0.2s, transform 0.1s;
}

#carousel-prev { left: 12px; }
#carousel-next { right: 12px; }
#carousel-prev:hover, #carousel-next:hover { background: rgba(0,0,0,0.7); }
#carousel-prev:active, #carousel-next:active { transform: translateY(-50%) scale(0.94); }

#carousel-dots {
  position: absolute;
  bottom: 12px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
  z-index: 10;
  background: rgba(0,0,0,0.18);
  padding: 6px 10px;
  border-radius: var(--radius-pill);
}

.dot {
  width: 8px;
  height: 8px;
  padding: 0;
  border: none;
  border-radius: 50%;
  background: rgba(255,255,255,0.55);
  transition: background 0.2s, transform 0.2s, width 0.25s;
}

.dot.active {
  background: white;
  width: 22px;
  border-radius: var(--radius-pill);
}

/* ── SDG Grid ── */
#sdg-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.sdg-card {
  background: var(--color-white);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: transform 0.2s, box-shadow 0.2s;
  display: flex;
  flex-direction: column;
  border: 2px solid transparent;
}

.sdg-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.sdg-card.in-cart {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(249,115,22,0.15), var(--shadow-sm);
}

.card-header {
  padding: 14px 14px 14px;
  padding-right: 62px;
  color: white;
  position: relative;
  height: 160px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  overflow: hidden;
}

.card-number {
  font-size: 0.72rem;
  font-weight: 700;
  opacity: 0.9;
  letter-spacing: 0.06em;
}

.card-icon {
  position: absolute;
  top: 10px;
  right: 10px;
  font-size: 2rem;
  line-height: 1;
  background: rgba(255,255,255,0.22);
  border-radius: 50%;
  width: 46px;
  height: 46px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.card-title {
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.3;
  margin-top: 2px;
}

.card-desc {
  font-size: 0.78rem;
  opacity: 0.92;
  line-height: 1.5;
  margin-top: 4px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-check {
  position: absolute;
  top: 4px;
  right: 4px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: rgba(255,255,255,0.95);
  color: var(--color-primary);
  display: none;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.78rem;
  box-shadow: var(--shadow-xs);
  z-index: 2;
}

.sdg-card.in-cart .card-check { display: flex; }

.card-actions {
  padding: 10px 12px;
  display: flex;
  gap: 6px;
  background: var(--color-white);
  margin-top: auto;
}

.btn-select {
  flex: 1;
  padding: 8px 4px;
  border: 2px solid var(--color-primary);
  border-radius: var(--radius-btn);
  background: white;
  color: var(--color-primary);
  font-size: 0.82rem;
  font-weight: 700;
  transition: background 0.15s, color 0.15s, transform 0.05s;
}

.btn-select:hover { background: #fff6ed; }
.btn-select:active { transform: scale(0.98); }
.btn-select.selected {
  background: var(--color-primary);
  color: white;
}
.btn-select.selected:hover { background: var(--color-primary-d); }

.btn-quick {
  padding: 8px 10px;
  border: 2px solid var(--color-blue);
  border-radius: var(--radius-btn);
  background: white;
  color: var(--color-blue);
  font-size: 0.82rem;
  font-weight: 700;
  transition: background 0.15s, color 0.15s;
}

.btn-quick:hover {
  background: var(--color-blue);
  color: white;
}

/* ── Cart Bar (비활성화됨 — badge로 대체) ── */
#cart-bar { display: none !important; }

/* ── Cart Page ── */
#cart-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 16px;
}

/* 장바구니 아이템 — 온라인 쇼핑몰 스타일 */
.cart-item {
  background: var(--color-white);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: stretch;
  overflow: hidden;
  transition: box-shadow 0.2s, transform 0.15s;
}

.cart-item:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.cart-item-strip {
  width: 5px;
  flex-shrink: 0;
}

.cart-item-thumb {
  width: 72px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  padding: 8px 0;
}

.cart-item-body {
  flex: 1;
  padding: 14px 12px 14px 10px;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.cart-item-tag {
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  color: var(--color-text-sub);
  text-transform: uppercase;
}

.cart-item-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.3;
}

.cart-item-desc {
  font-size: 0.78rem;
  color: var(--color-text-sub);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-top: 1px;
}

.btn-remove-cart {
  background: transparent;
  border: none;
  padding: 0 16px;
  color: #c0c8d4;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: color 0.15s, background 0.15s;
}

.btn-remove-cart:hover {
  color: var(--color-danger);
  background: var(--color-danger-bg);
}

.btn-remove-cart .material-icons-round { font-size: 22px; }

/* 빈 장바구니 */
.empty-msg {
  text-align: center;
  color: var(--color-text-sub);
  padding: 60px 16px 24px;
}

.empty-msg .empty-icon {
  display: block;
  font-size: 3rem;
  color: #d0d8e4;
  margin-bottom: 14px;
}

.empty-msg .empty-icon .material-icons-round { font-size: 72px; }

.empty-msg .empty-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 6px;
}

.empty-msg .empty-sub {
  font-size: 0.92rem;
  margin-bottom: 22px;
}

.empty-msg .btn-back {
  background: var(--color-blue);
  color: white;
  border: none;
  border-radius: var(--radius-btn);
  padding: 11px 24px;
  font-weight: 700;
  font-size: 0.95rem;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: background 0.18s;
}

.empty-msg .btn-back:hover { background: var(--color-blue-d); }
.empty-msg .btn-back .material-icons-round { font-size: 20px; }

/* 장바구니 Footer — 쇼핑몰 주문 요약 스타일 */
#cart-footer {
  background: var(--color-white);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
  overflow: hidden;
}

.cart-summary-bar {
  padding: 14px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.cart-summary-label {
  font-size: 0.88rem;
  color: var(--color-text-sub);
  font-weight: 600;
}

#cart-count {
  font-weight: 800;
  color: var(--color-blue);
  font-size: 1.05rem;
}

.cart-action-row {
  display: flex;
  gap: 10px;
  padding: 14px 16px;
  align-items: center;
}

.btn-clear-cart {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: transparent;
  color: var(--color-text-sub);
  border: 1px solid var(--color-border-d);
  border-radius: var(--radius-btn);
  padding: 10px 14px;
  font-size: 0.84rem;
  font-weight: 600;
  white-space: nowrap;
  transition: all 0.15s;
}

.btn-clear-cart:hover {
  background: var(--color-danger-bg);
  color: var(--color-danger);
  border-color: var(--color-danger);
}

.btn-clear-cart .material-icons-round { font-size: 18px; }

#btn-checkout {
  flex: 1;
  background: var(--color-primary);
  color: white;
  border: none;
  border-radius: var(--radius-btn);
  padding: 13px 16px;
  font-size: 1rem;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: background 0.18s, transform 0.05s;
  box-shadow: var(--shadow-sm);
}

#btn-checkout:hover { background: var(--color-primary-d); }
#btn-checkout:active { transform: scale(0.98); }
#btn-checkout .material-icons-round { font-size: 20px; }

/* ── Checkout Form ── */
#checkout-form {
  display: flex;
  flex-direction: column;
  gap: 18px;
  max-width: 680px;
  margin: 0 auto;
}

fieldset {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 18px 20px 18px;
  background: var(--color-white);
  box-shadow: var(--shadow-xs);
}

legend {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-blue);
  padding: 0 8px;
}

.field-row { margin-top: 12px; }
.field-row:first-of-type { margin-top: 6px; }

.field-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

fieldset label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 4px;
}

.field-hint {
  font-size: 0.85rem;
  color: var(--color-text-sub);
  margin-top: 4px;
  margin-bottom: 10px;
}

fieldset input[type="text"],
fieldset select,
fieldset textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--color-border-d);
  border-radius: var(--radius-btn);
  font-size: 0.95rem;
  color: var(--color-text);
  background: var(--color-white);
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}

fieldset input[type="text"]:hover,
fieldset select:hover,
fieldset textarea:hover { border-color: var(--color-blue); }

fieldset input[type="text"]:focus,
fieldset select:focus,
fieldset textarea:focus {
  border-color: var(--color-blue);
  box-shadow: 0 0 0 3px rgba(0,84,166,0.15);
}

fieldset input[aria-invalid="true"] {
  border-color: var(--color-danger);
  box-shadow: 0 0 0 3px rgba(220,38,38,0.12);
}

.chip-check,
.chip-radio {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  margin: 0;
  border: 1px solid var(--color-border-d);
  border-radius: var(--radius-pill);
  background: var(--color-white);
  cursor: pointer;
  font-weight: 500;
  font-size: 0.9rem;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}

.chip-check:has(input:checked),
.chip-radio:has(input:checked) {
  background: rgba(0,84,166,0.08);
  border-color: var(--color-blue);
  color: var(--color-blue);
  font-weight: 700;
}

.chip-check input,
.chip-radio input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.check-row,
#plan-mode-selector {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

#plan-mode-selector { margin-bottom: 14px; }

.field-error {
  display: block;
  color: var(--color-danger);
  font-size: 0.82rem;
  margin-top: 6px;
  font-weight: 500;
}

#plan-text-area textarea {
  resize: vertical;
  line-height: 1.6;
  min-height: 110px;
}

/* ── Canvas ── */
#canvas-toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
  flex-wrap: wrap;
  padding: 10px;
  background: var(--color-bg-sub);
  border-radius: var(--radius-btn);
}

.tool-item {
  display: inline-flex !important;
  align-items: center;
  gap: 6px;
  margin: 0 !important;
  font-size: 0.82rem !important;
  font-weight: 600 !important;
  color: var(--color-text-sub);
}

.tool-range { flex: 1; min-width: 120px; max-width: 220px; }

#canvas-toolbar input[type="color"] {
  width: 36px;
  height: 32px;
  border: 1px solid var(--color-border-d);
  border-radius: var(--radius-btn);
  padding: 2px;
  background: white;
  cursor: pointer;
}

#canvas-toolbar input[type="range"] {
  flex: 1;
  min-width: 80px;
  accent-color: var(--color-primary);
}

#btn-clear-canvas,
#btn-undo-canvas {
  background: white;
  border: 1px solid var(--color-border-d);
  border-radius: var(--radius-btn);
  padding: 7px 12px;
  font-size: 0.85rem;
  font-weight: 600;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}

#btn-undo-canvas:hover {
  background: #eef4fc;
  border-color: var(--color-blue);
  color: var(--color-blue);
}

#btn-clear-canvas:hover {
  background: var(--color-danger-bg);
  border-color: var(--color-danger);
  color: var(--color-danger);
}

#drawing-canvas {
  display: block;
  width: 100%;
  max-width: 600px;
  aspect-ratio: 2 / 1;
  border: 2px dashed var(--color-border-d);
  border-radius: var(--radius-card);
  cursor: crosshair;
  touch-action: none;
  background: white;
}

/* ── Form Actions ── */
.form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: space-between;
  align-items: center;
}

.btn-secondary {
  background: white;
  color: var(--color-blue);
  border: 1px solid var(--color-blue);
  border-radius: var(--radius-btn);
  padding: 11px 22px;
  font-weight: 700;
  font-size: 0.95rem;
  transition: background 0.15s;
}

.btn-secondary:hover { background: rgba(0,84,166,0.06); }

#btn-submit {
  background: var(--color-primary);
  color: white;
  border: none;
  border-radius: var(--radius-btn);
  padding: 13px 36px;
  font-size: 1.05rem;
  font-weight: 700;
  transition: background 0.18s, transform 0.05s;
  box-shadow: var(--shadow-sm);
}

#btn-submit:hover { background: var(--color-primary-d); }
#btn-submit:active { transform: scale(0.98); }
#btn-submit:disabled { opacity: 0.5; cursor: not-allowed; }

/* ── Checkout Items ── */
.checkout-item {
  padding: 10px 14px;
  margin-bottom: 8px;
  background: var(--color-bg);
  border-radius: var(--radius-btn);
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 10px;
}

.checkout-item .ci-icon {
  width: 32px;
  height: 32px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.checkout-empty {
  padding: 16px;
  text-align: center;
  color: var(--color-text-sub);
  font-size: 0.9rem;
}

/* ── Modals ── */
.modal {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  animation: modal-fade 0.18s ease-out;
}

@keyframes modal-fade {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.modal-overlay {
  position: absolute;
  inset: 0;
  background: rgba(15,23,42,0.55);
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
}

.modal-content {
  position: relative;
  background: var(--color-white);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-lg);
  max-width: 640px;
  width: 100%;
  max-height: 85vh;
  overflow-y: auto;
  padding: 28px 24px 24px;
  animation: modal-pop 0.22s cubic-bezier(0.2, 0.9, 0.4, 1);
}

@keyframes modal-pop {
  from { transform: translateY(8px) scale(0.98); opacity: 0; }
  to   { transform: translateY(0) scale(1); opacity: 1; }
}

.modal-close {
  position: absolute;
  top: 12px;
  right: 14px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 50%;
  width: 34px;
  height: 34px;
  font-size: 1.15rem;
  color: var(--color-text-sub);
  transition: background 0.15s, color 0.15s;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

.modal-close:hover { background: var(--color-danger-bg); color: var(--color-danger); }

.modal-content h2 {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-blue);
  margin-bottom: 12px;
  padding-right: 40px;
}

.modal-lead {
  color: var(--color-text-sub);
  font-size: 0.95rem;
  margin-bottom: 20px;
  line-height: 1.6;
}

.subhead {
  font-size: 1.02rem;
  font-weight: 700;
  margin: 18px 0 10px;
  color: var(--color-text);
}

/* ── Timeline ── */
.timeline {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-bottom: 8px;
  border-left: 3px solid var(--color-blue);
  padding-left: 20px;
}

.tl-item {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 8px 0;
  position: relative;
  font-size: 0.95rem;
}

.tl-item::before {
  content: '';
  position: absolute;
  left: -26px;
  top: 14px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-blue);
}

.tl-year {
  font-weight: 800;
  font-size: 1rem;
  color: var(--color-blue);
  min-width: 48px;
  letter-spacing: 0.02em;
}

/* ── Three Pillars ── */
.three-pillars {
  display: flex;
  gap: 10px;
  margin-bottom: 8px;
  justify-content: center;
  flex-wrap: wrap;
}

.pillar {
  flex: 1;
  min-width: 110px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 14px 12px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  font-size: 0.92rem;
}

.pillar-icon { font-size: 1.8rem; line-height: 1; }

/* ── SDG Dots (official images) ── */
#sdg-dots {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin-top: 6px;
}

.sdg-dot {
  width: 54px;
  height: 54px;
  border-radius: 8px;
  border: 2px solid transparent;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s, border-color 0.15s;
  padding: 0;
  overflow: hidden;
  background: transparent;
}

.sdg-dot img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 6px;
}

.sdg-dot:hover,
.sdg-dot:focus-visible {
  transform: scale(1.12);
  box-shadow: var(--shadow-md);
  border-color: rgba(0,0,0,0.2);
}

.sdg-source {
  font-size: 0.78rem;
  color: var(--color-text-sub);
  margin-top: 12px;
  text-align: center;
  line-height: 1.6;
}

.sdg-source a {
  color: var(--color-blue);
  text-decoration: none;
}

.sdg-source a:hover { text-decoration: underline; }

/* ── Accordion ── */
#sdg-accordion {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.accordion-item {
  background: var(--color-bg);
  border-radius: var(--radius-btn);
  overflow: hidden;
}

.accordion-header {
  width: 100%;
  background: none;
  border: none;
  border-radius: 0;
  padding: 12px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text);
  text-align: left;
  transition: background 0.15s;
  border-left: 4px solid transparent;
}

.accordion-header:hover { background: var(--color-bg-sub); }

.accordion-header-title {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.accordion-arrow {
  color: var(--color-text-sub);
  flex-shrink: 0;
  margin-left: 8px;
  width: 0;
  height: 0;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 6px solid currentColor;
  transition: transform 0.2s;
}

.accordion-header[aria-expanded="true"] .accordion-arrow {
  transform: rotate(180deg);
}

.accordion-body {
  padding: 0 14px 14px;
  font-size: 0.92rem;
  color: var(--color-text-sub);
  line-height: 1.7;
  background: var(--color-white);
  border-top: 1px solid var(--color-border);
}

.accordion-body p { padding-top: 12px; }

.accordion-body ul {
  margin-top: 8px;
  padding-left: 18px;
}

.accordion-body ul li { margin-bottom: 4px; }

/* ── Receipt Modal Layout ── */
#modal-receipt {
  flex-direction: column;
  gap: 0;
  align-items: center;
}

#modal-receipt .modal-content {
  border-radius: var(--radius-card) var(--radius-card) 0 0;
  max-height: 70vh;
  margin-bottom: 0;
  padding: 16px 12px 12px;
  background: #f0f0f0;
}

#receipt-actions {
  position: relative;
  z-index: 310;
  background: white;
  border-radius: 0 0 var(--radius-card) var(--radius-card);
  box-shadow: var(--shadow-lg);
  max-width: 640px;
  width: 100%;
  display: flex;
  gap: 8px;
  padding: 12px 16px;
  border-top: 1px solid var(--color-border);
}

#receipt-actions button {
  flex: 1;
  padding: 10px 6px;
  border: 1px solid var(--color-border-d);
  border-radius: var(--radius-btn);
  background: white;
  font-size: 0.85rem;
  font-weight: 700;
  transition: background 0.18s;
  white-space: nowrap;
}

#receipt-actions button:hover { background: var(--color-bg); }

#btn-complete {
  background: var(--color-primary) !important;
  color: white !important;
  border-color: var(--color-primary) !important;
}

#btn-complete:hover { background: var(--color-primary-d) !important; }

/* ── Receipt Paper (열전사 영수증 스타일) ── */
.receipt-paper {
  background: #fff;
  margin: 0 auto;
  max-width: 380px;
  width: 100%;
  font-family: 'Orbit', 'Courier New', Courier, monospace;
  font-size: 0.84rem;
  color: #1a1a1a;
  box-shadow: 0 4px 20px rgba(0,0,0,0.18), 0 1px 4px rgba(0,0,0,0.1);
  border-radius: 2px;
  position: relative;
  text-align: center;
}

.receipt-paper::before,
.receipt-paper::after {
  content: '';
  display: block;
  height: 10px;
  background: repeating-linear-gradient(
    -45deg,
    transparent 0, transparent 6px,
    #f0f0f0 6px, #f0f0f0 12px
  );
}

.rcp-color-stripe {
  display: flex;
  height: 5px;
  overflow: hidden;
}

.rcp-color-stripe span {
  flex: 1;
  height: 100%;
  display: block;
}

.rcp-header {
  text-align: center;
  padding: 18px 16px 12px;
  background: #fff;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.rcp-logo {
  font-size: 2rem;
  line-height: 1;
  margin-bottom: 6px;
  display: block;
  text-align: center;
}

.rcp-store-name {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  color: #0054A6;
  font-family: 'Orbit', 'Do Hyeon', var(--font-base);
  margin: 0 0 4px;
  text-align: center;
  width: 100%;
}

.rcp-store-sub {
  font-size: 0.74rem;
  color: #555;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin: 0 0 6px;
  text-align: center;
  font-family: 'Orbit', monospace;
}

.rcp-no {
  font-size: 0.7rem;
  color: #999;
  letter-spacing: 0.06em;
}

.rcp-divider {
  text-align: center;
  color: #bbb;
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  padding: 3px 12px;
  overflow: hidden;
  user-select: none;
}

.rcp-section {
  padding: 9px 18px;
  text-align: left;
}

.rcp-section-label {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: #888;
  margin-bottom: 7px;
  font-family: 'Orbit', monospace;
}

.rcp-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  padding: 2px 0;
  color: #444;
  font-family: 'Orbit', monospace;
}

.rcp-row-label { color: #888; }

.rcp-name {
  font-size: 1.05rem;
  font-weight: 800;
  color: #0054A6;
  font-family: 'Orbit', monospace;
  letter-spacing: 0.02em;
  line-height: 1.3;
}

.rcp-school {
  font-size: 0.75rem;
  color: #777;
  margin-top: 3px;
  font-family: 'Orbit', monospace;
}

.rcp-goals {
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.rcp-goal-item {
  display: flex;
  align-items: center;
  gap: 10px;
}

.rcp-goal-icon {
  width: 26px;
  height: 26px;
  border-radius: 5px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 0.85rem;
  flex-shrink: 0;
}

.rcp-goal-num {
  display: block;
  font-size: 0.65rem;
  color: #999;
  letter-spacing: 0.06em;
  font-family: var(--font-base);
}

.rcp-goal-title {
  font-size: 0.84rem;
  font-weight: 700;
  color: #222;
  font-family: var(--font-base);
  line-height: 1.3;
}

.rcp-methods {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
}

.rcp-method-chip {
  background: #f0f5ff;
  border: 1px solid #c5d5ee;
  border-radius: 99px;
  padding: 3px 10px;
  font-size: 0.76rem;
  font-weight: 600;
  color: #0054A6;
  font-family: var(--font-base);
}

.rcp-plan-text {
  background: #f9f9f9;
  border-left: 3px solid #0054A6;
  padding: 9px 12px;
  font-size: 0.82rem;
  line-height: 1.75;
  white-space: pre-wrap;
  margin-top: 6px;
  border-radius: 0 3px 3px 0;
  color: #333;
  font-family: var(--font-base);
  word-break: break-word;
}

.rcp-plan-drawing {
  max-width: 100%;
  border: 1px solid #ddd;
  border-radius: 4px;
  margin-top: 8px;
  display: block;
}

.rcp-none {
  color: #bbb;
  font-size: 0.8rem;
  font-family: var(--font-base);
}

.rcp-footer {
  text-align: center;
  padding: 10px 16px 16px;
  background: #fff;
  font-family: 'Orbit', monospace;
}

.rcp-footer-msg {
  font-size: 0.78rem;
  color: #333;
  font-weight: 700;
  letter-spacing: 0.06em;
  margin: 0 0 3px;
}

.rcp-footer-sub {
  font-size: 0.72rem;
  color: #777;
  margin: 0 0 10px;
  font-family: var(--font-base);
}

.rcp-barcode {
  height: 34px;
  background: repeating-linear-gradient(
    90deg,
    #1a1a1a 0px,   #1a1a1a 3px,
    transparent    3px,  transparent  6px,
    #1a1a1a 6px,   #1a1a1a 8px,
    transparent    8px,  transparent  11px,
    #1a1a1a 11px,  #1a1a1a 15px,
    transparent    15px, transparent  18px,
    #1a1a1a 18px,  #1a1a1a 20px,
    transparent    20px, transparent  23px,
    #1a1a1a 23px,  #1a1a1a 25px,
    transparent    25px, transparent  29px,
    #1a1a1a 29px,  #1a1a1a 33px,
    transparent    33px, transparent  36px,
    #1a1a1a 36px,  #1a1a1a 38px,
    transparent    38px, transparent  42px,
    #1a1a1a 42px,  #1a1a1a 43px,
    transparent    43px, transparent  46px,
    #1a1a1a 46px,  #1a1a1a 50px,
    transparent    50px, transparent  54px
  );
  margin: 0 auto 8px;
  width: 70%;
  opacity: 0.7;
}

.rcp-credit {
  font-size: 0.64rem;
  color: #bbb;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-family: var(--font-base);
}

/* ── Complete Modal ── */
#modal-complete .complete-card {
  text-align: center;
  padding: 40px 24px 32px;
}

.complete-icon {
  font-size: 4rem;
  line-height: 1;
  margin-bottom: 12px;
}

#modal-complete h2 {
  font-size: 1.5rem;
  margin-bottom: 12px;
  color: var(--color-blue);
  padding-right: 0;
}

#modal-complete p {
  color: var(--color-text-sub);
  margin-bottom: 24px;
  font-size: 1rem;
  line-height: 1.6;
}

#btn-go-home {
  background: var(--color-primary);
  color: white;
  border: none;
  border-radius: var(--radius-btn);
  padding: 13px 32px;
  font-size: 1.02rem;
  font-weight: 700;
  transition: background 0.18s, transform 0.05s;
}

#btn-go-home:hover { background: var(--color-primary-d); }
#btn-go-home:active { transform: scale(0.98); }

/* ── Toast ── */
#toast-container {
  position: fixed;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 400;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  pointer-events: none;
}

.toast {
  background: rgba(31, 41, 55, 0.95);
  color: white;
  padding: 10px 22px;
  border-radius: var(--radius-pill);
  font-size: 0.9rem;
  font-weight: 500;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.25s, transform 0.25s;
  white-space: nowrap;
  box-shadow: var(--shadow-md);
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

/* ── Footer ── */
#site-footer {
  margin-top: 48px;
  padding: 0 0 32px;
  text-align: center;
  font-size: 0.88rem;
  color: var(--color-text-sub);
  background: var(--color-white);
  border-top: 1px solid var(--color-border);
}

.footer-sdg-colors {
  display: flex;
  justify-content: center;
  gap: 0;
  margin-bottom: 20px;
}

.footer-sdg-colors span {
  flex: 1;
  height: 4px;
  display: block;
  max-width: 40px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 20px 16px 12px;
}

.footer-creator {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-blue);
  text-decoration: none;
  letter-spacing: 0.01em;
  transition: color 0.15s;
}

.footer-creator:hover,
.footer-creator:focus-visible {
  color: var(--color-blue-d);
  text-decoration: underline;
}

.footer-disclaimer {
  font-size: 0.75rem;
  color: var(--color-text-sub);
  line-height: 1.6;
  padding: 0 20px;
  opacity: 0.75;
}

/* ── 사용법 아이콘 버튼 ── */
#nav-help-btn .nav-help-text {
  display: inline;
}

/* ── 사용법 모달 ── */
.help-steps {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin: 0 0 24px;
  padding: 0;
}

.help-steps li {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  background: var(--color-bg);
  border-radius: var(--radius-card);
  padding: 14px 16px;
}

.help-step-num {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--color-blue);
  color: white;
  font-size: 0.85rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
}

.help-steps li > div {
  flex: 1;
  font-size: 0.92rem;
  line-height: 1.6;
}

.help-steps li strong {
  display: block;
  color: var(--color-text);
  font-size: 0.96rem;
  margin-bottom: 3px;
}

.help-steps li p {
  color: var(--color-text-sub);
  margin: 0;
}

.help-developer {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 20px;
  background: linear-gradient(135deg, rgba(0,84,166,0.07), rgba(63,126,68,0.07));
  border-radius: var(--radius-card);
  font-weight: 700;
  font-size: 0.92rem;
  color: var(--color-blue);
  border: 1px solid rgba(0,84,166,0.15);
}

/* ── Responsive ── */
@media (max-width: 768px) {
  #sdg-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  #main-header { padding: 0 10px; }
  #header-title { font-size: 1.05rem; }
  .lang-label { display: none; }
  .slide { min-height: 180px; }
  .slide-text-banner h2 { font-size: 1.2rem; }
  .slide-play-icon { width: 48px; height: 48px; font-size: 1.4rem; }
  .field-grid { grid-template-columns: 1fr; }
  .form-actions { flex-direction: column-reverse; align-items: stretch; }
  .form-actions > * { width: 100%; }
  #receipt-actions { gap: 6px; padding: 10px 12px; }
  #receipt-actions button { font-size: 0.78rem; padding: 9px 4px; }
  .receipt-paper { max-width: 100%; }
  .cart-item-thumb { width: 56px; font-size: 1.6rem; }
  .cart-item-title { font-size: 0.92rem; }
}

@media (max-width: 500px) {
  .page { padding: 16px 12px 32px; }
  .card-desc { display: none; }
  .card-header { height: 120px; padding-right: 56px; }
  .card-title { font-size: 0.95rem; }
  #modal-receipt .modal-content { padding: 10px 8px 8px; }
  .modal-content { padding: 22px 16px 18px; }
  .card-actions { flex-direction: column; gap: 6px; }
  .btn-quick { padding: 7px 4px; }
  .rcp-section { padding: 8px 14px; }
  .help-steps li { padding: 12px 12px; gap: 10px; }
  .cart-action-row { flex-direction: column; }
  .cart-action-row > * { width: 100%; justify-content: center; }
  .cart-item-desc { display: none; }
}

@media (max-width: 360px) {
  #sdg-grid { grid-template-columns: 1fr; }
}

/* ── Print ── */
@media print {
  body { background: white; }
  #main-header, #receipt-actions, .modal-close,
  #modal-sdgs-info, #modal-sdgs-dict, #modal-complete,
  #toast-container { display: none !important; }
  .modal { position: static; padding: 0; }
  .modal-overlay { display: none; }
  #modal-receipt {
    position: static;
    box-shadow: none;
    flex-direction: column;
  }
  #modal-receipt .modal-content {
    max-height: none;
    box-shadow: none;
    overflow: visible;
    border-radius: 0;
    padding: 0;
  }
}

/* ── Reduced motion ── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  #carousel-track { transition: none; }
}