/* style.css — AstroPro DX seminar landing page
   Design system derived from brand brochure colors:
   deep navy #124064, teal #208679/#2a8179/#21877a, cream #fcf2e9/#f9f1e4/#fdf8f2,
   peach accent #f0b69e, mint #dafbf4.
*/

:root {
  /* ---- Type scale (fluid clamp) ---- */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.2rem + 2.5vw, 3.25rem);
  --text-3xl: clamp(2.5rem, 1rem + 4vw, 4.5rem);
  --text-hero: clamp(2.75rem, 1rem + 5.5vw, 5.5rem);

  /* ---- Spacing (4px system) ---- */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* ---- Radius ---- */
  --radius-sm: 0.375rem;
  --radius-md: 0.625rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-full: 9999px;

  /* ---- Motion ---- */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);

  /* ---- Fonts ---- */
  --font-display: 'Sora', 'Hiragino Sans', 'Noto Sans JP', sans-serif;
  --font-body: 'Noto Sans JP', 'Sora', 'Hiragino Kaku Gothic ProN', sans-serif;

  /* ---- Content widths ---- */
  --content-narrow: 680px;
  --content-default: 1080px;
  --content-wide: 1280px;
}

/* ============ LIGHT THEME (default) ============ */
:root,
[data-theme='light'] {
  --color-bg: #fdf8f2;
  --color-surface: #fcf2e9;
  --color-surface-2: #ffffff;
  --color-surface-offset: #f4e8da;
  --color-surface-offset-2: #ecdcc8;
  --color-divider: oklch(0.4 0.05 55 / 0.14);
  --color-border: oklch(0.4 0.05 55 / 0.2);

  --color-text: #16283a;
  --color-text-muted: #4d5d6c;
  --color-text-faint: #8a9199;
  --color-text-inverse: #fdf8f2;

  --color-primary: #124064;
  --color-primary-hover: #0d2f4a;
  --color-primary-active: #092233;

  --color-teal: #21877a;
  --color-teal-hover: #186a60;
  --color-teal-highlight: #d8ece8;

  --color-accent: #d9835f;
  --color-accent-hover: #c26b48;
  --color-accent-active: #a8563a;
  --color-accent-highlight: #f7ddce;
  --color-accent-contrast: #16283a;

  --color-mint: #0f8b76;
  --color-mint-highlight: #d3f3ea;

  --color-success: #21877a;
  --color-success-highlight: #d8ece8;
  --color-error: #b3453b;
  --color-error-highlight: #f6dcd8;

  --shadow-sm: 0 1px 2px oklch(0.3 0.05 55 / 0.08);
  --shadow-md: 0 6px 16px oklch(0.3 0.05 55 / 0.1);
  --shadow-lg: 0 16px 40px oklch(0.3 0.05 55 / 0.14);

  --header-bg: oklch(0.98 0.015 75 / 0.85);
}

/* ============ DARK THEME ============ */
[data-theme='dark'] {
  --color-bg: #0a1826;
  --color-surface: #0f2338;
  --color-surface-2: #132a42;
  --color-surface-offset: #14304a;
  --color-surface-offset-2: #1a3a58;
  --color-divider: oklch(0.9 0.02 200 / 0.1);
  --color-border: oklch(0.9 0.02 200 / 0.16);

  --color-text: #eaf2f6;
  --color-text-muted: #a7b9ca;
  --color-text-faint: #6f8296;
  --color-text-inverse: #0a1826;

  --color-primary: #7fb3d9;
  --color-primary-hover: #9fc7e3;
  --color-primary-active: #bcd7ea;

  --color-teal: #4fc4b3;
  --color-teal-hover: #6fd3c4;
  --color-teal-highlight: #143b38;

  --color-accent: #f0b69e;
  --color-accent-hover: #f5c8b4;
  --color-accent-active: #f8d7c8;
  --color-accent-highlight: #3a2a24;
  --color-accent-contrast: #16283a;

  --color-mint: #dafbf4;
  --color-mint-highlight: #123b34;

  --color-success: #4fc4b3;
  --color-success-highlight: #143b38;
  --color-error: #e08b7f;
  --color-error-highlight: #3a2320;

  --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.3);
  --shadow-md: 0 6px 20px oklch(0 0 0 / 0.4);
  --shadow-lg: 0 20px 48px oklch(0 0 0 / 0.5);

  --header-bg: oklch(0.12 0.03 240 / 0.75);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg: #0a1826;
    --color-surface: #0f2338;
    --color-surface-2: #132a42;
    --color-surface-offset: #14304a;
    --color-surface-offset-2: #1a3a58;
    --color-divider: oklch(0.9 0.02 200 / 0.1);
    --color-border: oklch(0.9 0.02 200 / 0.16);
    --color-text: #eaf2f6;
    --color-text-muted: #a7b9ca;
    --color-text-faint: #6f8296;
    --color-text-inverse: #0a1826;
    --color-primary: #7fb3d9;
    --color-primary-hover: #9fc7e3;
    --color-teal: #4fc4b3;
    --color-teal-hover: #6fd3c4;
    --color-teal-highlight: #143b38;
    --color-accent: #f0b69e;
    --color-accent-hover: #f5c8b4;
    --color-accent-highlight: #3a2a24;
    --color-accent-contrast: #16283a;
    --color-mint: #dafbf4;
    --color-success: #4fc4b3;
    --color-error: #e08b7f;
    --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.3);
    --shadow-md: 0 6px 20px oklch(0 0 0 / 0.4);
    --shadow-lg: 0 20px 48px oklch(0 0 0 / 0.5);
    --header-bg: oklch(0.12 0.03 240 / 0.75);
  }
}

/* ============ GLOBAL TYPE ============ */
body {
  font-family: var(--font-body);
}
h1,
h2,
h3,
.brand__name {
  font-family: var(--font-display);
}

.container {
  width: 100%;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: clamp(var(--space-5), 4vw, var(--space-10));
}
.container--narrow {
  max-width: var(--content-narrow);
}

.eyebrow {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-teal);
  margin-bottom: var(--space-3);
}

.section-title {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-10);
  max-width: 32ch;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--color-primary);
  color: #fff;
  padding: var(--space-3) var(--space-5);
  z-index: 200;
  border-radius: 0 0 var(--radius-md) 0;
}
.skip-link:focus {
  left: 0;
}

/* ============ BUTTONS ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 600;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-full);
  min-height: 44px;
  text-decoration: none;
  white-space: nowrap;
  border: 1px solid transparent;
}
.btn--lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
}
.btn--primary {
  background: var(--color-primary);
  color: #fff;
}
.btn--primary:hover {
  background: var(--color-primary-hover);
}
.btn--accent {
  background: var(--color-accent);
  color: var(--color-accent-contrast);
}
.btn--accent:hover {
  background: var(--color-accent-hover);
  box-shadow: var(--shadow-md);
}
.btn--ghost {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}
.btn--ghost:hover {
  border-color: var(--color-text-muted);
  background: oklch(from var(--color-text) l c h / 0.05);
}
.btn--header {
  display: none;
}
@media (min-width: 900px) {
  .btn--header {
    display: inline-flex;
  }
}
.btn:active {
  transform: translateY(1px);
}

/* ============ HEADER ============ */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--header-bg);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-divider);
  transition:
    transform 0.3s var(--ease-out),
    box-shadow 0.3s var(--ease-out);
}
.header--hidden {
  transform: translateY(-100%);
}
.header--scrolled {
  box-shadow: var(--shadow-sm);
}
.header__inner {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: clamp(var(--space-5), 4vw, var(--space-10));
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  color: var(--color-primary);
}
[data-theme='dark'] .brand {
  color: var(--color-mint);
}
.brand__mark {
  color: inherit;
  flex-shrink: 0;
}
.brand__name {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.01em;
}

.nav {
  display: none;
}
@media (min-width: 900px) {
  .nav {
    display: block;
  }
}
.nav__list {
  display: flex;
  gap: var(--space-8);
}
.nav__list a {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
}
.nav__list a:hover {
  color: var(--color-text);
}

.header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
}
.theme-toggle:hover {
  color: var(--color-text);
  background: oklch(from var(--color-text) l c h / 0.06);
}

.nav-toggle {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
}
@media (min-width: 900px) {
  .nav-toggle {
    display: none;
  }
}
.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition-interactive), opacity var(--transition-interactive);
}
.nav-toggle[aria-expanded='true'] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle[aria-expanded='true'] span:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded='true'] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.mobile-nav {
  border-top: 1px solid var(--color-divider);
  padding: var(--space-6) clamp(var(--space-5), 4vw, var(--space-10));
  flex-direction: column;
  gap: var(--space-5);
  background: var(--color-bg);
}
.mobile-nav:not([hidden]) {
  display: flex;
}
.mobile-nav[hidden] {
  display: none;
}
.mobile-nav ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}
.mobile-nav a {
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-text);
  text-decoration: none;
}
.mobile-nav .btn {
  width: 100%;
}
@media (min-width: 900px) {
  .mobile-nav {
    display: none !important;
  }
}

/* ============ HERO ============ */
.hero {
  position: relative;
  overflow: hidden;
  min-height: 92vh;
  display: flex;
  align-items: center;
  background: linear-gradient(160deg, #0a1826 0%, #0d2436 55%, #0f3552 100%);
  color: var(--color-mint);
}
.hero__starfield {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}
.hero__image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: right center;
  opacity: 0.92;
  z-index: 1;
}
.hero__scrim {
  position: absolute;
  inset: 0;
  z-index: 2;
  background: linear-gradient(100deg, #0a1826 0%, rgba(10, 24, 38, 0.88) 32%, rgba(10, 24, 38, 0.35) 62%, rgba(10, 24, 38, 0.15) 100%);
}
.hero__content {
  position: relative;
  z-index: 3;
  padding-block: clamp(var(--space-24), 14vw, var(--space-32));
  max-width: 760px;
}
.eyebrow--hero {
  color: var(--color-accent);
}
.hero__title {
  font-size: var(--text-hero);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #fdf8f2;
  margin-bottom: var(--space-6);
  text-wrap: wrap;
  max-width: 13ch;
  text-align: left;
  text-justify: none;
}
.hero__accent {
  color: var(--color-accent);
}
.hero__subhead {
  font-size: var(--text-lg);
  color: oklch(0.92 0.03 190 / 0.88);
  max-width: 56ch;
  margin-bottom: var(--space-10);
  font-weight: 400;
}
.hero__subhead strong {
  color: #fdf8f2;
  font-weight: 700;
}
.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-bottom: var(--space-12);
}
.hero .btn--ghost {
  color: #fdf8f2;
  border-color: oklch(0.9 0.02 190 / 0.35);
}
.hero .btn--ghost:hover {
  border-color: oklch(0.9 0.02 190 / 0.6);
  background: oklch(1 0 0 / 0.06);
}
.hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-8);
  padding-top: var(--space-8);
  border-top: 1px solid oklch(0.9 0.02 190 / 0.18);
}
.hero__meta dt {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: oklch(0.85 0.03 190 / 0.6);
  margin-bottom: var(--space-1);
}
.hero__meta dd {
  font-size: var(--text-base);
  font-weight: 600;
  color: #fdf8f2;
}

.lb-desktop {
  display: none;
}
@media (min-width: 760px) {
  .lb-desktop {
    display: inline;
  }
}

/* ============ SECTIONS (general) ============ */
.section {
  padding-block: clamp(var(--space-16), 9vw, var(--space-24));
}
.section--problem {
  background: var(--color-surface);
  padding-block: clamp(var(--space-20), 10vw, var(--space-32));
}
.section--strengths {
  background: var(--color-surface);
}

/* ============ PROBLEM / STATS ============ */
.stat-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  margin-bottom: var(--space-12);
}
@media (min-width: 760px) {
  .stat-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}
.stat-card {
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}
.problem-lead {
  font-size: var(--text-base);
  line-height: 1.75;
  color: var(--color-text-muted);
  max-width: 52rem;
  margin: 0 0 var(--space-10);
}
.problem-lead strong {
  color: var(--color-primary);
}
[data-theme='dark'] .problem-lead strong {
  color: var(--color-teal);
}
.chart-card__title {
  font-size: var(--text-sm);
  font-weight: 700;
  line-height: 1.45;
  margin: 0;
}
.donut {
  position: relative;
  width: 168px;
  height: 168px;
  margin: var(--space-2) auto 0;
}
.donut__ring {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: conic-gradient(
    #b3453b 0 14.7%,
    var(--color-accent) 14.7% 60%,
    #8bb8b0 60% 92%,
    var(--color-teal) 92% 100%
  );
  -webkit-mask: radial-gradient(circle, transparent 57%, #000 58%);
  mask: radial-gradient(circle, transparent 57%, #000 58%);
}
.donut__hole {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}
.donut__hole span {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 800;
  line-height: 1;
  color: var(--color-accent);
}
.donut__hole small {
  margin-top: 0.2rem;
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--color-text-muted);
}
.chart-legend {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.35rem;
  font-size: 0.75rem;
  color: var(--color-text-muted);
}
.chart-legend li {
  display: flex;
  align-items: center;
  gap: 0.45rem;
}
.swatch {
  width: 0.65rem;
  height: 0.65rem;
  border-radius: 2px;
  flex-shrink: 0;
}
.swatch--bad { background: #b3453b; }
.swatch--accent { background: var(--color-accent); }
.swatch--teal-soft { background: #8bb8b0; }
.swatch--teal { background: var(--color-teal); }
.hbar-chart {
  display: grid;
  gap: 0.7rem;
  flex-grow: 1;
}
.hbar__meta {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.5rem;
  font-size: 0.78rem;
  margin-bottom: 0.28rem;
}
.hbar__meta span {
  color: var(--color-text);
  font-weight: 600;
}
.hbar__meta strong {
  font-family: var(--font-display);
  font-size: 0.8rem;
  color: var(--color-primary);
  white-space: nowrap;
}
[data-theme='dark'] .hbar__meta strong {
  color: var(--color-teal);
}
.hbar__track {
  height: 8px;
  border-radius: var(--radius-full);
  background: var(--color-surface-offset);
  overflow: hidden;
}
.hbar__fill {
  display: block;
  height: 100%;
  border-radius: var(--radius-full);
  background: var(--color-teal);
}
.hbar__fill--lead {
  background: var(--color-accent);
}
.chart-card__callout {
  margin: 0;
  font-size: 0.78rem;
  line-height: 1.5;
  color: var(--color-text-muted);
  padding: 0.7rem 0.8rem;
  border-radius: var(--radius-md);
  background: var(--color-accent-highlight);
}
.chart-card__callout strong {
  color: var(--color-accent);
}
[data-theme='dark'] .chart-card__callout {
  background: var(--color-accent-highlight);
  color: var(--color-text);
}
.stat-source {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin: calc(var(--space-6) * -1) 0 var(--space-10);
}
.stat-source a {
  color: var(--color-teal);
  text-decoration: underline;
  text-underline-offset: 2px;
}
.stat-source a:hover {
  color: var(--color-teal-hover);
}

.problem-conclusion {
  font-size: var(--text-lg);
  line-height: 1.7;
  max-width: 68ch;
  color: var(--color-text);
  border-top: 1px solid var(--color-divider);
  padding-top: var(--space-8);
}
.problem-conclusion strong {
  color: var(--color-primary);
}
[data-theme='dark'] .problem-conclusion strong {
  color: var(--color-teal);
}

/* ============ BENEFITS ============ */
.benefit-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}
@media (min-width: 760px) {
  .benefit-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .benefit-card--wide {
    grid-column: span 3;
  }
}
@media (min-width: 1080px) {
  .benefit-grid {
    grid-template-columns: repeat(6, 1fr);
  }
  .benefit-card--wide {
    grid-column: span 3;
  }
  .benefit-grid .benefit-card:not(.benefit-card--wide) {
    grid-column: span 2;
  }
}
.benefit-card {
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.benefit-card__index {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-teal);
}
.benefit-card h3 {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text);
}
.benefit-card p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}
.benefit-card--wide {
  background: linear-gradient(135deg, var(--color-primary) 0%, #16496e 100%);
  color: #fdf8f2;
  border-color: transparent;
}
.benefit-card--wide h3,
.benefit-card--wide p {
  color: #fdf8f2;
}
.benefit-card--wide .benefit-card__index {
  color: var(--color-accent);
}
.benefit-card--wide p {
  opacity: 0.88;
}

/* ============ STRENGTHS (feature rows, avoids 3-col grid pattern) ============ */
.feature-list {
  display: flex;
  flex-direction: column;
}
.feature-row {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-6);
  padding-block: var(--space-8);
  border-bottom: 1px solid var(--color-divider);
  align-items: baseline;
}
.feature-row:last-child {
  border-bottom: none;
}
.feature-row__number {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 800;
  color: var(--color-accent);
  line-height: 1;
  min-width: 2.2ch;
}
.feature-row__body h3 {
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--space-3);
  max-width: 42ch;
}
.feature-row__body p {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 62ch;
}

/* ============ PRICING ============ */
.pricing-table {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: var(--space-5);
}
.pricing-table__row {
  display: grid;
  grid-template-columns: 1fr 2fr;
  border-bottom: 1px solid var(--color-divider);
}
.pricing-table__row:last-child {
  border-bottom: none;
}
.pricing-table__row > div {
  padding: var(--space-6);
}
.pricing-table__row > div:first-child {
  border-right: 1px solid var(--color-divider);
}
.pricing-table__row--head {
  background: var(--color-primary);
  color: #fff;
}
.pricing-table__row--head > div:first-child {
  border-right-color: oklch(1 0 0 / 0.15);
}
.pricing-table__row--head div {
  font-size: var(--text-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.pricing-table__row:not(.pricing-table__row--head) {
  background: var(--color-surface-2);
}
.pricing-table__row:not(.pricing-table__row--head) > div:first-child {
  font-weight: 600;
  color: var(--color-text);
  display: flex;
  align-items: center;
}
.pricing-table__row strong {
  font-size: var(--text-lg);
  color: var(--color-primary);
}
[data-theme='dark'] .pricing-table__row strong {
  color: var(--color-teal);
}
.pricing-table__note {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}
.pricing-disclaimer {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

@media (max-width: 560px) {
  .pricing-table__row {
    grid-template-columns: 1fr;
  }
  .pricing-table__row > div:first-child {
    border-right: none;
    border-bottom: 1px solid var(--color-divider);
  }
}

/* ============ SEMINAR DETAIL ============ */
.detail-list {
  display: flex;
  flex-direction: column;
}
.detail-list__row {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: var(--space-4);
  padding-block: var(--space-5);
  border-bottom: 1px solid var(--color-divider);
}
.detail-list__row:last-child {
  border-bottom: none;
}
.detail-list__row dt {
  font-weight: 700;
  color: var(--color-teal);
  font-size: var(--text-sm);
}
.detail-list__row dd {
  color: var(--color-text);
  font-size: var(--text-base);
}
.detail-list__row--venue dd {
  line-height: 1.7;
}
.venue-by-date {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-5);
}
.venue-by-date__item {
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background: var(--color-surface-2);
}
.venue-by-date__head {
  margin: 0 0 var(--space-3);
  font-size: var(--text-base);
  line-height: 1.55;
}
.venue-by-date__status {
  display: inline-block;
  margin-right: var(--space-2);
  padding: 0.15rem 0.55rem;
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.03em;
  vertical-align: 0.05em;
}
.is-confirmed .venue-by-date__status {
  background: var(--color-teal-highlight);
  color: var(--color-teal);
}
.is-tbd .venue-by-date__status {
  background: var(--color-surface-offset);
  color: var(--color-text-muted);
}
.venue-by-date__place {
  margin: 0 0 var(--space-4);
  font-size: var(--text-sm);
  line-height: 1.65;
}
.venue-by-date__note {
  margin: 0;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
}
.is-confirmed .venue-entrance {
  margin-top: 0;
}
.venue-note {
  display: block;
  margin-top: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
}
.venue-note strong {
  color: var(--color-text);
  font-weight: 700;
}
.venue-entrance {
  margin-top: var(--space-5);
  padding: var(--space-4);
  max-width: 22rem;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}
.venue-entrance__label {
  margin: 0 0 var(--space-3);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-teal);
  letter-spacing: 0.04em;
}
.venue-entrance img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-divider);
}
.venue-entrance figcaption {
  margin-top: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
}
.venue-entrance figcaption strong {
  color: var(--color-text);
  font-weight: 700;
}
@media (max-width: 520px) {
  .detail-list__row {
    grid-template-columns: 1fr;
    gap: var(--space-1);
  }
  .venue-entrance {
    max-width: none;
  }
}
.perk-gift {
  position: relative;
  margin-top: var(--space-10);
  padding: var(--space-10) var(--space-8) var(--space-8);
  background:
    radial-gradient(ellipse at 90% 0%, oklch(0.55 0.08 55 / 0.35), transparent 50%),
    linear-gradient(155deg, #0e2f4d 0%, #124064 55%, #163a4f 100%);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg), inset 0 1px 0 oklch(1 0 0 / 0.12);
  color: #fdf8f2;
  overflow: hidden;
}
.perk-gift::before {
  content: '';
  position: absolute;
  inset: 10px;
  border-radius: calc(var(--radius-xl) - 6px);
  border: 1px solid oklch(0.82 0.08 70 / 0.28);
  pointer-events: none;
}
.perk-gift__ribbon {
  display: inline-block;
  margin: 0 0 var(--space-4);
  padding: 0.35rem 0.9rem;
  background: linear-gradient(180deg, #f3c9a8 0%, #e8a87a 100%);
  color: #3a2418;
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  border-radius: var(--radius-full);
  box-shadow: 0 6px 16px oklch(0.2 0.05 50 / 0.28);
}
.perk-gift__title {
  margin: 0 0 var(--space-3);
  font-size: var(--text-xl);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.35;
}
.perk-gift__lead {
  margin: 0 0 var(--space-8);
  font-size: var(--text-sm);
  line-height: 1.75;
  color: oklch(0.93 0.02 80 / 0.82);
  max-width: 40rem;
}
.perk-gift__items {
  display: grid;
  gap: var(--space-4);
}
@media (min-width: 640px) {
  .perk-gift__items {
    grid-template-columns: 1fr 1fr;
  }
}
.perk-gift__item {
  position: relative;
  background: #fdf8f2;
  color: var(--color-text);
  border-radius: var(--radius-lg);
  padding: var(--space-6) var(--space-5) var(--space-5);
  box-shadow: 0 10px 24px oklch(0.15 0.04 240 / 0.28);
}
.perk-gift__no {
  display: block;
  margin-bottom: var(--space-3);
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  color: var(--color-accent);
}
.perk-gift__icon {
  display: grid;
  place-items: center;
  width: 2.75rem;
  height: 2.75rem;
  margin-bottom: var(--space-4);
  border-radius: 0.85rem;
  background: var(--color-accent-highlight);
  color: var(--color-accent);
}
.perk-gift__item h4 {
  margin: 0 0 var(--space-2);
  font-size: 0.95rem;
  font-weight: 800;
  line-height: 1.45;
}
.perk-gift__item p {
  margin: 0;
  font-size: 0.8rem;
  line-height: 1.7;
  color: var(--color-text-muted);
}
.perk-gift__link-wrap {
  margin-top: var(--space-3) !important;
}
.perk-gift__link {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--color-accent);
  text-decoration: none;
}
.perk-gift__link:hover {
  text-decoration: underline;
}
[data-theme='dark'] .perk-gift {
  background:
    radial-gradient(ellipse at 90% 0%, oklch(0.5 0.08 70 / 0.28), transparent 52%),
    linear-gradient(155deg, #0a1c2c 0%, #10283c 100%);
}
[data-theme='dark'] .perk-gift__item {
  background: var(--color-surface-2);
  color: var(--color-text);
}

/* ============ YOUTUBE VIDEOS ============ */
.section--videos {
  background:
    radial-gradient(ellipse at 12% 0%, oklch(0.72 0.06 200 / 0.18), transparent 42%),
    radial-gradient(ellipse at 88% 100%, oklch(0.78 0.08 55 / 0.16), transparent 45%),
    var(--color-bg);
}
.videos-lead {
  margin: 0 0 var(--space-6);
  max-width: 40rem;
  font-size: var(--text-base);
  line-height: 1.85;
  color: var(--color-text-muted);
}
.videos-pickup {
  margin: 0 0 var(--space-4);
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
}
.yt-grid {
  display: grid;
  gap: var(--space-5);
}
@media (min-width: 720px) {
  .yt-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-6);
  }
}
.yt-card {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}
.yt-card:hover {
  transform: translateY(-3px);
  border-color: oklch(from var(--color-accent) l c h / 0.45);
  box-shadow: var(--shadow-md);
}
.yt-card:focus-visible {
  outline-offset: 4px;
}
.yt-card__thumb {
  position: relative;
  display: block;
  aspect-ratio: 16 / 9;
  background: #0f1c28;
  overflow: hidden;
}
.yt-card__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.02);
  transition: transform 0.4s ease;
}
.yt-card:hover .yt-card__thumb img {
  transform: scale(1.06);
}
.yt-card__play {
  position: absolute;
  inset: 50% auto auto 50%;
  translate: -50% -50%;
  display: grid;
  place-items: center;
  width: 3.25rem;
  height: 3.25rem;
  border-radius: 999px;
  background: oklch(0.55 0.2 25 / 0.92);
  color: #fff;
  box-shadow: 0 10px 28px oklch(0.2 0.05 30 / 0.35);
  transition: transform 0.25s ease, background 0.25s ease;
}
.yt-card:hover .yt-card__play {
  transform: scale(1.08);
  background: #ff0033;
}
.yt-card__body {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-5);
}
.yt-card__tag {
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--color-accent);
}
.yt-card__title {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 800;
  line-height: 1.4;
  letter-spacing: -0.01em;
}
.yt-card__desc {
  font-size: 0.84rem;
  line-height: 1.7;
  color: var(--color-text-muted);
}
.videos-cta {
  margin-top: var(--space-10);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-3);
}
.yt-channel-btn {
  gap: var(--space-3);
}
.yt-channel-btn__icon {
  flex-shrink: 0;
}
.videos-cta__note {
  margin: 0;
  max-width: 36rem;
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-text-muted);
}
@media (prefers-reduced-motion: reduce) {
  .yt-card,
  .yt-card__thumb img,
  .yt-card__play {
    transition: none;
  }
  .yt-card:hover {
    transform: none;
  }
}

/* ============ RESERVE FORM ============ */
.section--reserve {
  background: var(--color-surface);
}
.reserve-lead {
  color: var(--color-text-muted);
  margin-bottom: var(--space-8);
  font-size: var(--text-base);
}
.section--reserve .section-title {
  margin-bottom: var(--space-3);
}

.reserve-form {
  flex-direction: column;
  gap: var(--space-6);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: clamp(var(--space-6), 5vw, var(--space-10));
}
.reserve-form:not([hidden]) {
  display: flex;
}
.reserve-form[hidden] {
  display: none;
}
.form-row {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.form-row label {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
}
.required {
  color: var(--color-error);
  font-weight: 600;
  font-size: var(--text-xs);
  margin-left: var(--space-1);
}
.form-row input,
.form-row select,
.form-row textarea {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-base);
  min-height: 44px;
  color: var(--color-text);
}
.form-row textarea {
  min-height: 120px;
  resize: vertical;
}
.form-row input:focus-visible,
.form-row select:focus-visible,
.form-row textarea:focus-visible {
  outline: 2px solid var(--color-teal);
  outline-offset: 1px;
  border-color: var(--color-teal);
}
.form-row input[aria-invalid='true'],
.form-row select[aria-invalid='true'],
.form-row textarea[aria-invalid='true'] {
  border-color: var(--color-error);
}
.field-hint {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}
.field-error {
  font-size: var(--text-xs);
  color: var(--color-error);
  min-height: 1em;
}
.field-error:empty {
  display: none;
}

.form-row--submit {
  margin-top: var(--space-2);
}
#submit-btn {
  position: relative;
  width: 100%;
}
@media (min-width: 560px) {
  #submit-btn {
    width: auto;
    align-self: flex-start;
  }
}
.btn__spinner {
  display: none;
  width: 16px;
  height: 16px;
  border: 2px solid oklch(0.2 0.02 55 / 0.3);
  border-top-color: currentColor;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
#submit-btn.is-loading .btn__label {
  opacity: 0.6;
}
#submit-btn.is-loading .btn__spinner {
  display: inline-block;
}
#submit-btn:disabled {
  cursor: not-allowed;
}
@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.form-status {
  font-size: var(--text-sm);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  background: var(--color-error-highlight);
  color: var(--color-error);
}
.form-status[data-variant='success'] {
  background: var(--color-success-highlight);
  color: var(--color-success);
}

.reserve-success {
  background: var(--color-surface-2);
  border: 1px solid var(--color-teal);
  border-radius: var(--radius-lg);
  padding: clamp(var(--space-10), 6vw, var(--space-16));
  text-align: center;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  color: var(--color-teal);
  animation: fade-up 0.5s var(--ease-out);
}
.reserve-success:not([hidden]) {
  display: flex;
}
.reserve-success[hidden] {
  display: none;
}
[data-theme='dark'] .reserve-success {
  color: var(--color-mint);
}
.reserve-success h3 {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text);
}
.reserve-success p {
  color: var(--color-text-muted);
  font-size: var(--text-base);
}
@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============ FOOTER ============ */
.footer {
  background: var(--color-primary);
  color: oklch(0.95 0.02 190 / 0.9);
  padding-block: clamp(var(--space-12), 6vw, var(--space-16));
}
[data-theme='dark'] .footer {
  background: #071320;
}
.footer .brand {
  color: var(--color-accent);
}
.footer .brand__name {
  color: #fdf8f2;
}
.footer__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-10);
  padding-bottom: var(--space-10);
  border-bottom: 1px solid oklch(1 0 0 / 0.15);
}
@media (min-width: 760px) {
  .footer__inner {
    grid-template-columns: 1.2fr 1fr 1fr;
  }
}
.footer__tagline {
  margin-top: var(--space-3);
  font-size: var(--text-sm);
  color: oklch(0.95 0.02 190 / 0.7);
}
.footer__contact ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  font-size: var(--text-sm);
}
.footer__contact a {
  color: #fdf8f2;
  text-decoration: none;
}
.footer__contact a:hover {
  color: var(--color-accent);
  text-decoration: underline;
}
.footer__label {
  display: inline-block;
  min-width: 5.5em;
  color: oklch(0.95 0.02 190 / 0.55);
}
.footer__nav ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  font-size: var(--text-sm);
}
.footer__nav a {
  color: oklch(0.95 0.02 190 / 0.85);
  text-decoration: none;
}
.footer__nav a:hover {
  color: var(--color-accent);
}
.footer__bottom {
  padding-top: var(--space-8);
  font-size: var(--text-xs);
  color: oklch(0.95 0.02 190 / 0.5);
}

/* ============ RESPONSIVE ADJUSTMENTS ============ */
@media (max-width: 759px) {
  .hero__content {
    padding-block: clamp(var(--space-20), 20vw, var(--space-24)) var(--space-16);
  }
  .hero {
    min-height: 100vh;
  }
}

/* -------------------------------------------------------
   当日・飛び入り参加のお知らせ
------------------------------------------------------- */

.walkin-notice {
  display: flex;
  align-items: flex-start;
  gap: 18px;
  width: min(100%, 980px);
  max-width: 980px;
  margin: 26px auto 0;
  padding: 22px 26px;
  box-sizing: border-box;
  border: 3px solid #ffd36a;
  border-radius: 14px;
  background: #ffffff;
  color: #172b3a;
  box-shadow: 0 14px 32px rgba(0, 0, 0, 0.34);
  text-align: left;
}

.walkin-notice__icon {
  display: grid;
  flex: 0 0 42px;
  width: 42px;
  height: 42px;
  place-items: center;
  border-radius: 50%;
  background: #e85d35;
  color: #ffffff;
  font-size: 26px;
  font-weight: 800;
  line-height: 1;
}

.walkin-notice__body {
  min-width: 0;
}

.walkin-notice__eyebrow {
  margin: 0 0 5px;
  color: #b64224;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.walkin-notice__title {
  margin: 0;
  color: #123c61;
  font-size: clamp(1.3rem, 3vw, 1.75rem);
  font-weight: 800;
  line-height: 1.4;
}

.walkin-notice__text {
  margin: 9px 0 0;
  color: #172b3a;
  font-size: clamp(0.95rem, 2vw, 1.05rem);
  font-weight: 600;
  line-height: 1.75;
}

.walkin-notice__note {
  margin: 9px 0 0;
  padding-top: 9px;
  border-top: 1px solid #d8e1e7;
  color: #4d6270;
  font-size: 0.86rem;
  line-height: 1.65;
}

@media (max-width: 600px) {
  .walkin-notice {
    gap: 12px;
    margin-top: 18px;
    padding: 16px;
    border-width: 2px;
    border-radius: 12px;
  }

  .walkin-notice__icon {
    flex-basis: 34px;
    width: 34px;
    height: 34px;
    font-size: 21px;
  }

  .walkin-notice__eyebrow {
    font-size: 0.69rem;
  }

  .walkin-notice__title {
    font-size: 1.18rem;
  }

  .walkin-notice__text {
    font-size: 0.92rem;
    line-height: 1.65;
  }

  .walkin-notice__note {
    font-size: 0.78rem;
  }
}