/* ===========================================================
   ES Transform — about page (about.html) styles
   =========================================================== */

html, body {
  overflow-x: hidden;
  line-height: 1.65;
}

/* ---------- Typography ---------- */
h1, h2, h3 {
  font-family: 'Cormorant Garamond', 'Shippori Mincho', serif;
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: -0.01em;
}

h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 400;
  line-height: 1.05;
  margin-bottom: 1rem;
}
h1 em { font-style: italic; font-weight: 500; color: var(--accent); }

h2 {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  margin-bottom: 1.5rem;
  margin-top: 0;
}
h2 em { font-style: italic; color: var(--accent); font-weight: 500; }

h3 {
  font-size: clamp(1.2rem, 2.5vw, 1.5rem);
  margin-bottom: 0.6rem;
  font-weight: 500;
}

p {
  font-size: 1.05rem;
  margin-bottom: 1.1rem;
}

.section-label {
  display: inline-block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
  opacity: 0.85;
}

a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px dotted var(--accent);
  transition: border-style 0.2s;
}
@media (hover: hover) {
  a:hover { border-bottom-style: solid; }
}

strong { font-weight: 500; }

/* ---------- Top nav ---------- */
.top-nav {
  padding: 1.25rem var(--pad-x);
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid rgba(58, 42, 31, 0.15);
  background: var(--paper);
}

.top-nav .logo {
  font-family: 'Cormorant Garamond', 'Shippori Mincho', serif;
  font-size: 1.1rem;
  font-weight: 500;
  border: none;
  color: var(--ink);
}
.top-nav .logo em { font-style: italic; color: var(--accent); }

.top-nav nav a {
  margin-left: 1.25rem;
  font-style: italic;
  font-size: 0.95rem;
  color: var(--line);
  border: none;
}
.top-nav nav a.cta {
  background: var(--ink);
  color: var(--paper);
  padding: 0.45rem 1rem;
  font-style: italic;
}
@media (hover: hover) {
  .top-nav nav a:hover { color: var(--accent); }
  .top-nav nav a.cta:hover { background: var(--accent); color: var(--paper); }
}

@media (max-width: 600px) {
  .top-nav nav a { margin-left: 0.7rem; font-size: 0.85rem; }
  .top-nav nav a:not(.cta) { display: none; }
}

/* ---------- Hero ---------- */
.hero {
  padding: 4.5rem var(--pad-x) 4rem;
  background: var(--paper);
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 3rem;
  align-items: center;
  max-width: 1280px;
  margin: 0 auto;
}

@media (max-width: 900px) {
  .hero { padding: 2.5rem var(--pad-x) 2.5rem; }
  .hero-grid { grid-template-columns: 1fr; gap: 2.5rem; }
}

.hero-lede {
  font-style: italic;
  font-size: clamp(1.1rem, 1.6vw, 1.25rem);
  color: var(--line);
  margin-bottom: 2rem;
  line-height: 1.55;
  max-width: 44ch;
}

@media (max-width: 900px) {
  .hero-lede { max-width: none; }
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

@media (max-width: 600px) {
  .hero-buttons { gap: 0.6rem; }
  .hero-buttons .hero-cta {
    flex: 1 1 100%;
    text-align: center;
  }
}

.hero-cta {
  display: inline-block;
  background: var(--ink);
  color: var(--paper);
  padding: 0.95rem 2rem;
  font-family: 'Cormorant Garamond', 'Shippori Mincho', serif;
  font-style: italic;
  font-size: 1.15rem;
  border: none;
  transition: background 0.2s;
}
.hero-cta.secondary { background: transparent; color: var(--ink); border: 1px solid var(--ink); }
@media (hover: hover) {
  .hero-cta:hover { background: var(--accent); }
  .hero-cta.secondary:hover { background: var(--ink); color: var(--paper); }
}

.hero-visual {
  aspect-ratio: 1 / 1;
  background: var(--paper-dark);
  border: 1px solid var(--line);
  box-shadow: 8px 8px 0 var(--ink);
  overflow: hidden;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}
@media (max-width: 700px) {
  .hero-visual { box-shadow: 4px 4px 0 var(--ink); }
}

.hero-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-visual .placeholder {
  color: var(--line);
  font-style: italic;
  font-size: 1rem;
  opacity: 0.5;
  text-align: center;
  padding: 1rem;
}
.hero-visual .placeholder small {
  display: block;
  margin-top: 0.4rem;
  font-size: 0.8rem;
}

/* ---------- Sections ---------- */
section {
  padding: 4rem var(--pad-x);
  border-top: 1px solid rgba(58, 42, 31, 0.15);
  background: var(--paper);
}

@media (max-width: 700px) {
  section { padding: 2.5rem var(--pad-x); }
}

.section-inner {
  max-width: 1200px;
  margin: 0 auto;
}
.section-inner.narrow {
  max-width: 820px;
}

/* ---------- Effects grid ---------- */
.effects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 2rem;
}

@media (max-width: 900px) {
  .effects-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 600px) {
  .effects-grid { grid-template-columns: 1fr; }
}

.effect-card {
  background: var(--paper-dark);
  border: 1px solid var(--line);
  padding: 1.5rem;
  position: relative;
}

.effect-card .effect-image {
  aspect-ratio: 1 / 1;
  background: var(--ink);
  margin-bottom: 1rem;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}
.effect-card .effect-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.effect-card .effect-image .placeholder {
  color: rgba(237, 228, 211, 0.4);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  letter-spacing: 0.15em;
}

.effect-card h3 {
  font-style: italic;
  color: var(--accent);
  margin-bottom: 0.4rem;
}
.effect-card .formula {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  color: var(--line);
  opacity: 0.7;
  margin-bottom: 0.6rem;
  letter-spacing: 0.03em;
}
.effect-card p {
  font-size: 0.95rem;
  line-height: 1.55;
  margin: 0;
}

blockquote {
  margin: 2rem 0;
  padding: 1rem 1.5rem;
  border-left: 3px solid var(--accent);
  background: var(--paper-dark);
  font-style: italic;
  font-size: 1.05rem;
  line-height: 1.55;
  color: var(--line);
}

blockquote cite {
  display: block;
  font-size: 0.85rem;
  margin-top: 0.5rem;
  font-style: normal;
  opacity: 0.7;
}

/* ---------- Steps ---------- */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 2rem;
  counter-reset: step;
}

@media (max-width: 700px) {
  .steps { grid-template-columns: 1fr; }
}

.step {
  background: var(--paper-dark);
  padding: 1.5rem;
  border-top: 3px solid var(--accent);
  counter-increment: step;
  position: relative;
}

.step::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  top: 0.5rem;
  right: 0.8rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.5rem;
  color: var(--accent);
  opacity: 0.4;
}

.step h3 {
  font-size: 1.1rem;
  font-style: italic;
  color: var(--ink);
  margin-bottom: 0.5rem;
}

.step p {
  font-size: 0.92rem;
  line-height: 1.55;
  margin: 0;
}

/* ---------- FAQ ---------- */
.faq-list {
  margin-top: 2rem;
}

details {
  border-top: 1px solid rgba(58, 42, 31, 0.2);
  padding: 1.25rem 0;
}
details:last-of-type { border-bottom: 1px solid rgba(58, 42, 31, 0.2); }

summary {
  cursor: pointer;
  font-family: 'Cormorant Garamond', 'Shippori Mincho', serif;
  font-size: 1.15rem;
  font-weight: 500;
  color: var(--ink);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}
summary::-webkit-details-marker { display: none; }
summary::after {
  content: '+';
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.2rem;
  color: var(--accent);
  flex-shrink: 0;
  transition: transform 0.2s;
}
details[open] summary::after {
  content: '−';
}

details p {
  margin-top: 1rem;
  font-size: 1rem;
  line-height: 1.65;
  color: var(--line);
}

/* ---------- Disclaimer ---------- */
.disclaimer-list {
  list-style: none;
  margin-left: 0;
  margin-bottom: 1.5rem;
  padding-left: 0;
}
.disclaimer-list li {
  padding: 1rem 0;
  border-bottom: 1px solid rgba(58, 42, 31, 0.15);
  font-size: 0.95rem;
  line-height: 1.65;
}
.disclaimer-list li:last-child { border-bottom: none; }
.disclaimer-list li strong {
  color: var(--accent);
  margin-right: 0.4rem;
}
.disclaimer-note {
  font-size: 0.88rem;
  font-style: italic;
  color: var(--line);
  opacity: 0.8;
  padding-top: 1rem;
  border-top: 1px solid rgba(58, 42, 31, 0.2);
  margin-top: 1rem;
}

/* ---------- Sister tool ---------- */
.sister-card {
  display: block;
  margin-top: 2rem;
  background: var(--paper-dark);
  border: 1px solid var(--line);
  box-shadow: 6px 6px 0 var(--ink);
  padding: 1.75rem 2rem;
  transition: transform 0.2s, box-shadow 0.2s;
}
@media (hover: hover) {
  .sister-card:hover { transform: translate(-2px, -2px); box-shadow: 8px 8px 0 var(--accent); }
}
@media (max-width: 700px) {
  .sister-card { box-shadow: 4px 4px 0 var(--ink); padding: 1.5rem; }
}
.sister-card-kicker {
  display: block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.5rem;
}
.sister-card h3 {
  font-style: italic;
  color: var(--ink);
  margin-bottom: 0.5rem;
}
.sister-card p {
  font-size: 0.98rem;
  line-height: 1.6;
  color: var(--line);
  margin-bottom: 0.9rem;
}
.sister-card-go {
  font-family: 'Cormorant Garamond', 'Shippori Mincho', serif;
  font-style: italic;
  font-size: 1.05rem;
  color: var(--accent);
}

/* ---------- Final CTA ---------- */
.final-cta {
  background: var(--ink);
  color: var(--paper);
  padding: 5rem var(--pad-x);
  text-align: center;
  border-top: none;
}

.final-cta h2 { color: var(--paper); }
.final-cta h2 em { color: var(--accent); }
.final-cta p {
  color: rgba(237, 228, 211, 0.85);
  margin-left: auto;
  margin-right: auto;
}
.final-cta .hero-cta {
  background: var(--paper);
  color: var(--ink);
  margin-top: 1.5rem;
  font-size: 1.25rem;
  padding: 1.1rem 2.5rem;
}
@media (hover: hover) {
  .final-cta .hero-cta:hover { background: var(--accent); color: var(--paper); }
}

/* ---------- Footer ---------- */
footer {
  background: var(--paper);
  padding: 2rem var(--pad-x);
  border-top: 1px solid rgba(58, 42, 31, 0.2);
  font-size: 0.9rem;
  color: var(--line);
  text-align: center;
}

footer .footer-links {
  margin-bottom: 0.75rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.25rem 0;
}
footer .footer-links a {
  margin: 0 0.6rem;
  font-style: italic;
  border-bottom: 1px solid rgba(58, 42, 31, 0.4);
}
footer .copyright {
  font-style: italic;
  opacity: 0.75;
  font-size: 0.85rem;
}

/* ---------- Controls & Parameters section ---------- */
.controls-subhead {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  margin-top: 2.5rem;
  margin-bottom: 0.5rem;
}

.controls-list {
  /* グループの上下境界は実線、中の項目間はドット線 */
  border-top: 1px solid rgba(58, 42, 31, 0.25);
  border-bottom: 1px solid rgba(58, 42, 31, 0.25);
  margin-bottom: 1rem;
}
.controls-list .control-item {
  padding: 1.1rem 0;
  border-bottom: 1px dotted rgba(58, 42, 31, 0.4);
}
.controls-list .control-item:last-child {
  border-bottom: none;  /* グループ最下端は .controls-list の実線を使う */
}

.control-name {
  display: block;
  font-family: 'Cormorant Garamond', 'Shippori Mincho', serif;
  font-style: italic;
  font-weight: 500;
  font-size: 1.15rem;
  color: var(--accent);
  margin-bottom: 0.45rem;
  line-height: 1.35;
}
.control-name code {
  display: inline-block;
  font-family: 'JetBrains Mono', monospace;
  font-style: normal;
  font-weight: 400;
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  background: var(--paper-dark);
  color: var(--line);
  padding: 0.15rem 0.5rem;
  margin-left: 0.35rem;
  vertical-align: 0.15em;
  border: 1px solid rgba(58, 42, 31, 0.15);
}

.control-item p {
  font-size: 0.95rem;
  line-height: 1.65;
  margin: 0;
  color: var(--ink);
}
.control-item p strong {
  color: var(--accent);
  font-weight: 500;
}

/* preset-by-preset table */
.preset-params-wrap {
  margin-top: 0.5rem;
  overflow-x: auto;  /* スマホで横スクロール許可 */
  -webkit-overflow-scrolling: touch;
}
.preset-params {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  min-width: 480px;
}
.preset-params th, .preset-params td {
  text-align: left;
  padding: 0.65rem 0.8rem;
  border-bottom: 1px solid rgba(58, 42, 31, 0.2);
  vertical-align: top;
}
.preset-params thead th {
  background: var(--paper-dark);
  font-family: 'JetBrains Mono', monospace;
  font-style: normal;
  font-weight: 500;
  color: var(--accent);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border-bottom: 1px solid var(--line);
}
.preset-params tbody td:first-child {
  font-style: italic;
  white-space: nowrap;
}
.preset-params tbody tr:last-child td { border-bottom: none; }