/* =========================================================
   LINE スタンプ・絵文字 メーカー（公開版）
   ========================================================= */

:root {
  --color-bg: #FAF8F5;
  --color-bg-card: #FFFFFF;
  --color-text: #2A2520;
  --color-text-sub: #6B6358;
  --color-text-muted: #A89F92;
  --color-accent: #F2C4C4;
  --color-accent-strong: #E89999;
  --color-cream: #F5EFE0;
  --color-brown: #4A3728;
  --color-sand: #C8B89A;
  --color-border: #E8E0D0;
  --color-success: #6FB67D;
  --shadow-sm: 0 1px 3px rgba(74, 55, 40, 0.08);
  --shadow-md: 0 4px 16px rgba(74, 55, 40, 0.10);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --transition: 0.25s cubic-bezier(0.2, 0.8, 0.2, 1);
}

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

body {
  margin: 0;
  font-family: "Noto Sans JP", -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  background-image:
    radial-gradient(circle at 10% 20%, rgba(242, 196, 196, 0.12) 0%, transparent 40%),
    radial-gradient(circle at 90% 80%, rgba(245, 239, 224, 0.4) 0%, transparent 40%);
  background-attachment: fixed;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

h1, h2, h3 { margin: 0; }
button { font-family: inherit; }

/* ===== Header ===== */
.site-header {
  padding: 32px 24px 24px;
  text-align: center;
}

.site-header__inner { max-width: 720px; margin: 0 auto; }

.site-header__title {
  font-size: 26px;
  font-weight: 700;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.site-header__title-jp { color: var(--color-brown); }

.site-header__title-en {
  font-family: "Inter", sans-serif;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--color-text-muted);
  text-transform: uppercase;
}

.site-header__tagline {
  margin: 12px 0 0;
  color: var(--color-text-sub);
  font-size: 13px;
}

/* ===== App ===== */
.app {
  flex: 1;
  max-width: 920px;
  width: 100%;
  margin: 0 auto;
  padding: 16px 24px 64px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

/* ===== Step ===== */
.step {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: 28px 28px 32px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: opacity var(--transition);
}

.step--hidden { display: none; }

.step__head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 24px;
}

.step__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--color-accent);
  color: var(--color-brown);
  font-family: "Inter", sans-serif;
  font-weight: 700;
  font-size: 15px;
}

.step__title {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-brown);
}

.step__sub {
  margin: 0 0 0 auto;
  font-size: 13px;
  color: var(--color-text-muted);
}

/* ===== Mode Toggle ===== */
.mode-toggle {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.mode-toggle__btn {
  appearance: none;
  border: 2px solid var(--color-border);
  background: var(--color-bg);
  border-radius: var(--radius-md);
  padding: 20px;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  gap: 4px;
  text-align: left;
}

.mode-toggle__btn:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

.mode-toggle__btn--active {
  border-color: var(--color-accent-strong);
  background: var(--color-accent);
  color: var(--color-brown);
}

.mode-toggle__label { font-size: 18px; font-weight: 700; }

.mode-toggle__spec {
  font-family: "Inter", sans-serif;
  font-size: 12px;
  color: var(--color-text-sub);
}

.mode-toggle__btn--active .mode-toggle__spec { color: var(--color-brown); }

/* ===== Dropzone ===== */
.dropzone {
  border: 2px dashed var(--color-sand);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  padding: 48px 24px;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
}

.dropzone:hover,
.dropzone:focus,
.dropzone--dragover {
  border-color: var(--color-accent-strong);
  background: rgba(242, 196, 196, 0.08);
  outline: none;
}

.dropzone__icon { margin: 0 0 12px; font-size: 40px; color: var(--color-accent-strong); }
.dropzone__text { margin: 0 0 8px; font-size: 16px; font-weight: 500; }
.dropzone__link {
  color: var(--color-accent-strong);
  font-weight: 700;
  margin-left: 6px;
  text-decoration: underline;
}
.dropzone__hint { margin: 0; font-size: 12px; color: var(--color-text-muted); }

/* ===== Config Grid ===== */
.config-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 24px;
}

@media (max-width: 720px) {
  .config-grid { grid-template-columns: 1fr; }
}

.config-grid__preview {
  background: var(--color-bg);
  border-radius: var(--radius-md);
  padding: 12px;
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 280px;
}

.config-grid__canvas {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
}

.config-grid__form {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

/* ===== Form Row ===== */
.form-row { display: flex; flex-direction: column; gap: 6px; }

.form-row__label {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-sub);
  display: flex;
  align-items: center;
  gap: 8px;
}

.form-row__input {
  appearance: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  font-size: 14px;
  font-family: inherit;
  background: var(--color-bg-card);
  transition: var(--transition);
}

.form-row__input:focus {
  outline: none;
  border-color: var(--color-accent-strong);
  box-shadow: 0 0 0 3px rgba(242, 196, 196, 0.2);
}

.form-row__input[type="range"] { padding: 0; }

.form-row__input[type="checkbox"] {
  width: 16px;
  height: 16px;
  margin: 0;
}

.form-row__output {
  font-family: "Inter", sans-serif;
  font-size: 12px;
  color: var(--color-text-sub);
  align-self: flex-end;
}

.form-row__hint { margin: 0; font-size: 11px; color: var(--color-text-muted); }

.bg-color-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.bg-color-row input[type="color"] {
  width: 44px;
  height: 32px;
  padding: 0;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  cursor: pointer;
  background: transparent;
}

.bg-color-row__hint {
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 11px;
  color: var(--color-text-muted);
}

/* ===== Button ===== */
.btn {
  appearance: none;
  border: none;
  border-radius: var(--radius-md);
  padding: 14px 24px;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.btn--primary {
  background: var(--color-brown);
  color: #fff;
}

.btn--primary:hover:not(:disabled) {
  background: #5C4533;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn--secondary {
  background: var(--color-bg);
  color: var(--color-brown);
  border: 1px solid var(--color-border);
}

.btn--secondary:hover:not(:disabled) {
  border-color: var(--color-brown);
  background: var(--color-bg-card);
}

.btn--ghost {
  background: transparent;
  color: var(--color-text-sub);
  border: 1px solid var(--color-border);
}

.btn--ghost:hover:not(:disabled) {
  border-color: var(--color-accent-strong);
  color: var(--color-accent-strong);
}

.btn--sm { padding: 8px 14px; font-size: 13px; }

/* ===== Preview Grid ===== */
.preview-hint {
  margin: 0 0 16px;
  font-size: 12px;
  color: var(--color-text-muted);
  text-align: center;
}

.preview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 12px;
  margin-bottom: 24px;
}

.preview-cell {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 8px;
  position: relative;
  transition: var(--transition);
  background-image:
    linear-gradient(45deg, #f0ece4 25%, transparent 25%),
    linear-gradient(-45deg, #f0ece4 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #f0ece4 75%),
    linear-gradient(-45deg, transparent 75%, #f0ece4 75%);
  background-size: 16px 16px;
  background-position: 0 0, 0 8px, 8px -8px, -8px 0;
}

.preview-cell:hover {
  border-color: var(--color-accent-strong);
  transform: scale(1.03);
}

.preview-cell__img { width: 100%; height: auto; display: block; }

.preview-cell__label {
  position: absolute;
  top: 4px;
  left: 4px;
  background: rgba(74, 55, 40, 0.85);
  color: #fff;
  font-family: "Inter", sans-serif;
  font-size: 10px;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 4px;
}

.preview-cell--main {
  outline: 3px solid var(--color-accent-strong);
  outline-offset: 2px;
}

.preview-cell__main-mark {
  position: absolute;
  top: 4px;
  right: 4px;
  background: var(--color-accent-strong);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 4px;
}

.preview-cell__actions {
  display: flex;
  gap: 4px;
  margin-top: 6px;
}

.preview-cell__action {
  flex: 1;
  appearance: none;
  font-family: inherit;
  font-size: 11px;
  font-weight: 700;
  padding: 5px 2px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background: var(--color-bg-card);
  color: var(--color-text-sub);
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

.preview-cell__action:hover {
  border-color: var(--color-accent-strong);
  color: var(--color-accent-strong);
}

.preview-cell__action--edit:hover {
  border-color: var(--color-brown);
  color: var(--color-brown);
}

.preview-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ===== Main / Tab Preview ===== */
.main-tab-preview {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  padding: 20px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 24px;
}

@media (max-width: 480px) {
  .main-tab-preview { grid-template-columns: 1fr; }
}

.main-tab-preview__col {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.main-tab-preview__label {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-brown);
  margin: 0;
}

.main-tab-preview__spec {
  margin: 0;
  font-family: "Inter", sans-serif;
  font-size: 11px;
  color: var(--color-text-muted);
}

.main-tab-preview__frame {
  width: 240px;
  height: 240px;
  background-image:
    linear-gradient(45deg, #f0ece4 25%, transparent 25%),
    linear-gradient(-45deg, #f0ece4 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #f0ece4 75%),
    linear-gradient(-45deg, transparent 75%, #f0ece4 75%);
  background-size: 16px 16px;
  background-position: 0 0, 0 8px, 8px -8px, -8px 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.main-tab-preview__frame--sm { width: 96px; height: 74px; }

.main-tab-preview__img {
  max-width: 100%;
  max-height: 100%;
  display: block;
}

.main-tab-preview__source {
  margin: 0;
  font-size: 11px;
  color: var(--color-text-sub);
}

/* ===== Loader ===== */
.loader {
  position: fixed;
  inset: 0;
  background: rgba(74, 55, 40, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  backdrop-filter: blur(4px);
}

.loader[hidden] { display: none; }

.loader__inner {
  background: var(--color-bg-card);
  padding: 32px 48px;
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  box-shadow: var(--shadow-md);
}

.loader__spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-accent-strong);
  border-radius: 50%;
  animation: loader-spin 0.8s linear infinite;
}

@keyframes loader-spin {
  to { transform: rotate(360deg); }
}

.loader__text { font-size: 13px; color: var(--color-text-sub); }

/* ===== Page Nav (about) ===== */
.page-nav {
  margin: 16px auto 0;
  max-width: 720px;
  padding: 0 24px;
  text-align: center;
}

.page-nav__link {
  color: var(--color-text-sub);
  text-decoration: none;
  font-size: 13px;
  font-weight: 600;
}

.page-nav__link:hover { color: var(--color-accent-strong); }

/* ===== About — How To List ===== */
.howto-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 24px;
  counter-reset: howto;
}

.howto-item {
  position: relative;
  padding: 20px 20px 20px 24px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--color-accent-strong);
}

.howto-item__title {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-brown);
  margin: 0 0 8px;
}

.howto-item p { margin: 0 0 8px; font-size: 14px; }
.howto-item p:last-child { margin-bottom: 0; }

.howto-item__hint {
  background: var(--color-bg-card);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  font-size: 12px;
  color: var(--color-text-sub);
}

/* ===== Specs Table ===== */
.specs-table-wrap {
  overflow-x: auto;
  margin: 16px 0;
}

.specs-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.specs-table th,
.specs-table td {
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

.specs-table thead th {
  background: var(--color-bg);
  font-weight: 700;
  color: var(--color-brown);
  font-size: 13px;
}

.specs-table tbody th {
  font-weight: 600;
  color: var(--color-text-sub);
  white-space: nowrap;
}

.specs-table tbody td { color: var(--color-text); }

.specs-note {
  margin: 12px 0 0;
  font-size: 12px;
  color: var(--color-text-muted);
}

.specs-note a {
  color: var(--color-brown);
  text-decoration: underline;
}

/* ===== Bullet List ===== */
.bullet-list {
  margin: 0;
  padding-left: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 14px;
  line-height: 1.7;
}

.bullet-list li::marker {
  color: var(--color-accent-strong);
}

.bullet-list a {
  color: var(--color-brown);
  text-decoration: underline;
}

.back-to-top {
  text-align: center;
  margin-top: 8px;
}

/* ===== Prompt Example ===== */
.prompt-example__title {
  margin: 24px 0 8px;
  font-size: 14px;
  font-weight: 700;
  color: var(--color-brown);
}

.prompt-example {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-accent-strong);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 12px;
  line-height: 1.7;
  white-space: pre-wrap;
  word-break: break-word;
  overflow-wrap: anywhere;
  margin: 0 0 8px;
  max-height: 360px;
  overflow-y: auto;
  overflow-x: hidden;
  color: var(--color-text);
  max-width: 100%;
  box-sizing: border-box;
}

.prompt-tips {
  margin-top: 24px;
  padding: 16px 18px;
  background: var(--color-cream);
  border-radius: var(--radius-md);
}

.prompt-tips__title {
  margin: 0 0 12px;
  font-size: 14px;
  font-weight: 700;
  color: var(--color-brown);
}

/* === 必須プロンプトテンプレート === */
.prompt-required {
  position: relative;
  margin: 16px 0 32px;
  padding: 20px 20px 16px;
  background: rgba(242, 196, 196, 0.18);
  border: 2px solid var(--color-accent-strong);
  border-radius: var(--radius-md);
}

.prompt-required__badge {
  position: absolute;
  top: -14px;
  left: 16px;
  background: var(--color-accent-strong);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 999px;
  letter-spacing: 0.05em;
}

.prompt-required__title {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-brown);
  margin: 6px 0 8px;
}

.prompt-required__lead {
  font-size: 13px;
  margin: 0 0 12px;
  color: var(--color-text-sub);
  line-height: 1.7;
}

.prompt-example--required {
  background: var(--color-bg-card);
  border-left-color: var(--color-accent-strong);
  margin-bottom: 12px;
}

/* ===== Footer ===== */
.site-footer {
  text-align: center;
  padding: 24px 16px 32px;
  border-top: 1px solid var(--color-border);
  background: var(--color-bg-card);
}

.site-footer__copy {
  margin: 0;
  font-family: "Inter", sans-serif;
  font-size: 12px;
  color: var(--color-text-sub);
}

.site-footer__copy a {
  color: var(--color-brown);
  text-decoration: none;
  font-weight: 600;
}

.site-footer__copy a:hover { color: var(--color-accent-strong); }

.site-footer__credit {
  margin: 4px 0 0;
  font-size: 11px;
  color: var(--color-text-muted);
}

/* ===== 手書き修正エディタ ===== */
.editor {
  position: fixed;
  inset: 0;
  z-index: 10000;
  background: rgba(74, 55, 40, 0.55);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.editor[hidden] { display: none; }

.editor__panel {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  width: 100%;
  max-width: 560px;
  max-height: 92vh;
  overflow-y: auto;
  padding: 20px 22px 22px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.editor__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.editor__title { font-size: 17px; font-weight: 700; color: var(--color-brown); }
.editor__num { font-family: "Inter", sans-serif; color: var(--color-text-muted); }

.editor__close {
  appearance: none;
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 14px;
  color: var(--color-text-sub);
  transition: var(--transition);
}

.editor__close:hover { border-color: var(--color-accent-strong); color: var(--color-accent-strong); }

.editor__stage {
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 12px;
  background-color: #fbf9f5;
  background-image:
    linear-gradient(45deg, #e6e0d4 25%, transparent 25%),
    linear-gradient(-45deg, #e6e0d4 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #e6e0d4 75%),
    linear-gradient(-45deg, transparent 75%, #e6e0d4 75%);
  background-size: 20px 20px;
  background-position: 0 0, 0 10px, 10px -10px, -10px 0;
}

.editor__canvas {
  max-width: 100%;
  max-height: 56vh;
  height: auto;
  touch-action: none;
  cursor: crosshair;
}

.editor__toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 16px;
  align-items: center;
  justify-content: space-between;
}

.editor__modes { display: flex; gap: 8px; }

.editor__mode {
  appearance: none;
  font-family: inherit;
  font-size: 13px;
  font-weight: 700;
  padding: 8px 14px;
  border-radius: var(--radius-md);
  border: 2px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-text-sub);
  cursor: pointer;
  transition: var(--transition);
}

.editor__mode--active {
  border-color: var(--color-accent-strong);
  background: var(--color-accent);
  color: var(--color-brown);
}

.editor__brush {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-sub);
}

.editor__brush input[type="range"] { width: 120px; }

.editor__brush-out {
  font-family: "Inter", sans-serif;
  font-size: 12px;
  color: var(--color-text-sub);
  min-width: 42px;
}

.editor__history { display: flex; gap: 8px; }

.editor__hint {
  margin: 0;
  font-size: 12px;
  color: var(--color-text-muted);
  background: var(--color-bg);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  line-height: 1.6;
}

.editor__actions { display: flex; gap: 12px; justify-content: flex-end; }

@media (max-width: 520px) {
  .editor__toolbar { justify-content: flex-start; }
  .editor__actions { justify-content: stretch; }
  .editor__actions .btn { flex: 1; }
}