/* HALL LP — Light / Trust theme */

:root {
  --color-bg: #ffffff;
  --color-bg-deep: #ffffff;
  --color-bg-subtle: #f8fafc;
  --color-bg-muted: #f1f5f9;
  --color-surface: #ffffff;
  --color-surface-solid: #ffffff;
  --color-surface-hover: #f8fafc;
  --color-border: #e2e8f0;
  --color-border-strong: #cbd5e1;
  --color-text: #0f172a;
  --color-text-muted: #64748b;
  --color-accent: #2563eb;
  --color-accent-warm: #0d9488;
  --color-accent-secondary: #0d9488;
  --color-accent-glow: rgba(37, 99, 235, 0.25);
  --color-accent-soft: rgba(37, 99, 235, 0.08);
  --color-success: #059669;
  --color-warning: #d97706;
  --color-danger: #dc2626;
  --font-sans: "DM Sans", "Noto Sans JP", system-ui, sans-serif;
  --font-display: "Fraunces", "Noto Sans JP", Georgia, serif;
  --font-mincho-noto: "Noto Serif JP", "Hiragino Mincho ProN", "Yu Mincho", serif;
  --font-mincho-shippori: "Shippori Mincho", "Noto Serif JP", "Hiragino Mincho ProN", serif;
  --header-h: 4.5rem;
  --radius-lg: 1.25rem;
  --radius-md: 0.75rem;
  --radius-sm: 0.5rem;
  --shadow-card: 0 4px 24px rgba(15, 23, 42, 0.08);
  --shadow-soft: 0 1px 3px rgba(15, 23, 42, 0.06);
  --shadow-glow: 0 8px 32px rgba(37, 99, 235, 0.12);
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --max-width: 72rem;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--color-text);
  background-color: var(--color-bg);
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  cursor: pointer;
}

/* —— Hero background photo —— */
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
}

.hero-bg__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center right;
}

.hero-bg__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    105deg,
    rgba(255, 255, 255, 0.97) 0%,
    rgba(255, 255, 255, 0.92) 38%,
    rgba(255, 255, 255, 0.72) 58%,
    rgba(255, 255, 255, 0.35) 100%
  );
}

/* —— Header —— */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(1.25rem, 4vw, 2.5rem);
  transition: background 0.35s var(--ease-out), border-color 0.35s var(--ease-out),
    backdrop-filter 0.35s var(--ease-out), box-shadow 0.35s var(--ease-out);
}

.site-header.is-scrolled {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-soft);
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.02em;
  color: var(--color-text);
}

.logo__mark {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-warm));
  display: grid;
  place-items: center;
  box-shadow: 0 4px 12px var(--color-accent-glow);
}

.logo__mark span {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 3vw, 2rem);
  font-size: 0.9rem;
}

.site-nav a {
  color: var(--color-text-muted);
  transition: color 0.2s;
}

.site-nav a:hover {
  color: var(--color-text);
}

.nav-cta {
  padding: 0.5rem 1rem;
  border-radius: 999px;
  background: var(--color-accent);
  color: #fff !important;
  font-weight: 600;
  box-shadow: 0 4px 14px var(--color-accent-glow);
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
}

.nav-cta:hover {
  transform: translateY(-1px);
  background: #1d4ed8;
  box-shadow: 0 6px 20px var(--color-accent-glow);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--color-text);
  font-size: 1.25rem;
  padding: 0.5rem;
}

/* —— Layout —— */
.section-inner {
  width: min(var(--max-width), 100% - 2.5rem);
  margin-inline: auto;
}

.section-header {
  text-align: center;
  max-width: 42rem;
  margin-inline: auto;
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
}

.section-eyebrow {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin: 0 0 0.75rem;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 600;
  line-height: 1.25;
  margin: 0 0 1rem;
  color: var(--color-text);
}

.section-desc {
  color: var(--color-text-muted);
  margin: 0;
  font-size: 1.05rem;
}

.section-divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-border), transparent);
  margin: clamp(3rem, 8vw, 6rem) auto;
  max-width: 24rem;
}

/* —— Buttons —— */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.5rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  transition: transform 0.25s var(--ease-out), box-shadow 0.25s, background 0.25s;
}

.btn--primary {
  background: var(--color-accent);
  color: #fff;
  box-shadow: 0 4px 16px var(--color-accent-glow);
}

.btn--primary:hover {
  transform: translateY(-2px);
  background: #1d4ed8;
  box-shadow: 0 8px 24px var(--color-accent-glow);
}

.btn--ghost {
  background: #fff;
  color: var(--color-text);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-soft);
}

.btn--ghost:hover {
  border-color: var(--color-border-strong);
  background: var(--color-bg-subtle);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  background: #fff;
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  box-shadow: var(--shadow-soft);
}

.badge--accent {
  border-color: rgba(37, 99, 235, 0.25);
  color: var(--color-accent);
  background: var(--color-accent-soft);
}

/* —— Fade-in —— */
.fade-in {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}

.fade-in.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in[data-delay="1"] {
  transition-delay: 0.1s;
}
.fade-in[data-delay="2"] {
  transition-delay: 0.2s;
}
.fade-in[data-delay="3"] {
  transition-delay: 0.3s;
}
.fade-in[data-delay="4"] {
  transition-delay: 0.4s;
}
.fade-in[data-delay="5"] {
  transition-delay: 0.5s;
}

/* —— Hero —— */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: grid;
  align-items: center;
  padding: calc(var(--header-h) + 2rem) clamp(1.25rem, 4vw, 2.5rem) 4rem;
  overflow: hidden;
}

.hero__grid {
  position: relative;
  z-index: 1;
  width: min(var(--max-width), 100%);
  margin-inline: auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}

.hero__eyebrow {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0 0 1.5rem;
}

.hero__title {
  --hero-size-xl: clamp(2.85rem, 6.6vw, 4.3rem);
  --hero-size-lg: clamp(2rem, 4.6vw, 3rem);
  --hero-size-sm: clamp(0.9rem, 1.8vw, 1.1rem);
  font-family: var(--font-display);
  margin: 0 0 1.5rem;
  color: var(--color-text);
}

.hero__title-lockup {
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0;
}

/* Row 1: 会議に参加するAI — 1行目全体を明朝 */
.hero__title-row--main {
  display: flex;
  flex-wrap: nowrap;
  align-items: baseline;
  font-size: var(--hero-size-xl);
  line-height: 1.14;
  color: var(--color-text);
}

.hero__title-lockup--mincho-noto .hero__title-row--main {
  font-family: var(--font-mincho-noto);
  font-weight: 600;
  letter-spacing: 0.01em;
}

.hero__title-lockup--mincho-shippori .hero__title-row--main {
  font-family: var(--font-mincho-shippori);
  font-weight: 700;
  letter-spacing: 0.02em;
}

.hero__title-main-lead {
  flex-shrink: 0;
}

.hero__title-ai {
  position: relative;
  font-size: 1.1em;
  font-weight: inherit;
  font-style: normal;
  letter-spacing: 0.04em;
  line-height: 1;
  display: inline-block;
  vertical-align: -0.02em;
  flex-shrink: 0;
}

.hero__title-ai__icon {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  font-family: "Font Awesome 6 Free";
  font-size: 2.2em;
  line-height: 1;
  color: var(--color-accent);
  opacity: 0.12;
  z-index: 0;
  pointer-events: none;
}

.hero__title-ai__text {
  position: relative;
  z-index: 1;
}

/* Row 2: 正解は 単純 だった。 — ゴシック */
.hero__title-row--punch {
  display: inline-flex;
  align-items: baseline;
  flex-wrap: nowrap;
  gap: 0.18em;
  margin-top: 0.52em;
  font-family: var(--font-sans);
}

.hero__title-prefix,
.hero__title-suffix {
  font-size: var(--hero-size-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  line-height: 1.2;
  flex-shrink: 0;
}

.hero__title-highlight {
  font-family: var(--font-sans);
  font-size: var(--hero-size-lg);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  flex-shrink: 0;
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-warm));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero__divider {
  display: flex;
  align-items: center;
  align-self: flex-start;
  gap: clamp(0.5rem, 1.2vw, 0.75rem);
  height: auto;
  margin: 0.75rem 0 0;
  border: 0;
  background: none;
  animation: fadeUp 0.8s var(--ease-out) 0.35s both;
}

.hero__divider__line {
  flex: 1;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent,
    var(--color-accent) 20%,
    var(--color-accent-warm) 80%,
    transparent
  );
  opacity: 0.85;
}

.hero__divider__mark {
  flex-shrink: 0;
  width: 6px;
  height: 6px;
  transform: rotate(45deg);
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-warm));
  opacity: 0.9;
}

.hero__lead {
  font-size: clamp(1rem, 2vw, 1.15rem);
  color: var(--color-text-muted);
  margin: 0 0 2rem;
  max-width: 32rem;
  animation: fadeUp 0.8s var(--ease-out) 0.5s both;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  animation: fadeUp 0.8s var(--ease-out) 0.7s both;
}

.hero__visual {
  display: flex;
  justify-content: center;
  animation: fadeUp 1s var(--ease-out) 0.4s both;
}

.cycle-diagram {
  width: min(100%, 22rem);
  aspect-ratio: 1;
  position: relative;
  padding: 1.25rem;
  overflow: visible;
  background: rgba(255, 255, 255, 0.85);
  border-radius: 50%;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--color-border);
}

.cycle-diagram svg {
  width: 100%;
  height: 100%;
}

.cycle-ring {
  fill: none;
  stroke: var(--color-border);
  stroke-width: 1.5;
}

.cycle-ring--active {
  stroke: url(#cycleGradient);
  stroke-width: 2.5;
  stroke-dasharray: 8 6;
  animation: ringRotate 30s linear infinite;
  transform-origin: center;
}

@keyframes ringRotate {
  to {
    transform: rotate(360deg);
  }
}

.cycle-node {
  position: absolute;
  padding: 0.35rem 0.6rem;
  border-radius: 999px;
  font-size: 0.62rem;
  font-weight: 600;
  background: #fff;
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  white-space: nowrap;
  box-shadow: var(--shadow-soft);
  transition: border-color 0.3s, color 0.3s, box-shadow 0.3s;
  max-width: 5.5rem;
  text-align: center;
  line-height: 1.3;
}

.cycle-node:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  box-shadow: var(--shadow-glow);
}

.cycle-node--knowledge {
  top: 0;
  left: 50%;
  transform: translateX(-50%);
}
.cycle-node--decision {
  top: 50%;
  right: 0;
  transform: translateY(-50%);
}
.cycle-node--action {
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
}
.cycle-node--result {
  top: 50%;
  left: 0;
  transform: translateY(-50%);
}

.hero__scroll-hint {
  position: absolute;
  z-index: 1;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
  0%,
  100% {
    transform: translateX(-50%) translateY(0);
  }
  50% {
    transform: translateX(-50%) translateY(6px);
  }
}

/* —— Problem cards —— */
.problem {
  padding: clamp(4rem, 10vw, 7rem) 0;
  background: var(--color-bg);
}

.problem__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.pain-card {
  padding: 1.75rem;
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-soft);
  transition: transform 0.35s var(--ease-out), border-color 0.35s, box-shadow 0.35s;
}

.pain-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-card);
}

.pain-card__icon {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-sm);
  background: var(--color-accent-soft);
  color: var(--color-accent);
  display: grid;
  place-items: center;
  font-size: 1.1rem;
  margin-bottom: 1rem;
}

.pain-card__title {
  font-size: 1.05rem;
  font-weight: 600;
  margin: 0 0 0.5rem;
}

.pain-card__text {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin: 0;
}

/* —— Solution —— */
.solution {
  padding: clamp(4rem, 10vw, 7rem) 0;
  background: var(--color-bg-subtle);
}

.solution__quote {
  margin-top: 2.5rem;
  padding: 1.5rem 2rem;
  border-left: 3px solid var(--color-accent);
  background: #fff;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-style: italic;
  color: var(--color-text);
  box-shadow: var(--shadow-soft);
}

/* —— Timeline —— */
.how {
  padding: clamp(4rem, 10vw, 7rem) 0;
  background: var(--color-bg);
}

.timeline {
  position: relative;
  max-width: 36rem;
  margin-inline: auto;
  padding-left: 2.5rem;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 0.65rem;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--color-accent), var(--color-border));
}

.timeline__step {
  position: relative;
  padding-bottom: 2.5rem;
  opacity: 0.45;
  transition: opacity 0.5s var(--ease-out);
}

.timeline__step.is-active {
  opacity: 1;
}

.timeline__step::before {
  content: "";
  position: absolute;
  left: -2.5rem;
  top: 0.35rem;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid var(--color-border);
  transition: border-color 0.4s, box-shadow 0.4s, background 0.4s;
}

.timeline__step.is-active::before {
  border-color: var(--color-accent);
  background: var(--color-accent);
  box-shadow: 0 0 0 4px var(--color-accent-soft);
}

.timeline__num {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  margin-bottom: 0.25rem;
}

.timeline__title {
  font-size: 1.15rem;
  font-weight: 600;
  margin: 0 0 0.35rem;
}

.timeline__text {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin: 0;
}

.cycle-explainer {
  max-width: 28rem;
  margin: 2.5rem auto 0;
  padding: 1.5rem 1.75rem;
  border-radius: var(--radius-lg);
  background: var(--color-bg-subtle);
  border: 1px solid var(--color-border);
}

.cycle-explainer__title {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--color-accent);
  margin: 0 0 1rem;
  text-align: center;
}

.cycle-explainer__list {
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.cycle-explainer__list li {
  padding: 0.35rem 0;
}

.cycle-explainer__list strong {
  color: var(--color-text);
  font-weight: 600;
}

/* —— Compare —— */
.compare {
  padding: clamp(4rem, 10vw, 7rem) 0;
  background: var(--color-bg-subtle);
}

.compare__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.compare__col {
  padding: 2rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background: #fff;
  box-shadow: var(--shadow-soft);
}

.compare__col--old {
  opacity: 0.85;
}

.compare__col--hall {
  background: #fff;
  border-color: rgba(37, 99, 235, 0.25);
  border-left: 4px solid var(--color-accent);
  box-shadow: var(--shadow-card);
}

.compare__label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 1.25rem;
}

.compare__col--old .compare__label {
  color: var(--color-text-muted);
}

.compare__col--hall .compare__label {
  color: var(--color-accent);
}

.compare__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.compare__list li {
  position: relative;
  padding-left: 1.25rem;
  margin-bottom: 0.85rem;
  font-size: 0.95rem;
  color: var(--color-text-muted);
  transition: color 0.3s;
}

.compare__col--old .compare__list li {
  opacity: 1;
  transform: none;
}

.compare__col--hall .compare__list li {
  opacity: 1;
  transform: none;
  color: var(--color-text);
}

.compare__list li.is-highlight {
  color: var(--color-accent);
}

.compare__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-text-muted);
}

.compare__col--hall .compare__list li::before {
  background: var(--color-accent);
}

.compare__headline {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  line-height: 1.45;
  color: var(--color-text);
  margin: 0 0 1.25rem;
}

.compare__body {
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

.compare__items {
  margin: 0 0 1.25rem;
  line-height: 1.85;
  color: var(--color-text);
}

.compare__summary {
  margin: 0;
  line-height: 1.65;
}

/* —— Features —— */
.features {
  padding: clamp(4rem, 10vw, 7rem) 0;
  background: var(--color-bg);
}

.features__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.feature-card {
  padding: 1.75rem;
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-soft);
  transition: transform 0.35s var(--ease-out), border-color 0.35s, box-shadow 0.35s;
}

.feature-card:hover {
  transform: translateY(-3px);
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-card);
}

.feature-card__icon {
  font-size: 1.35rem;
  color: var(--color-accent);
  margin-bottom: 0.85rem;
}

.feature-card__title {
  font-size: 1rem;
  font-weight: 600;
  margin: 0 0 0.4rem;
}

.feature-card__text {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin: 0;
}

/* —— Silent demo —— */
.silent-demo {
  padding: clamp(4rem, 10vw, 7rem) 0;
  background: var(--color-bg-subtle);
}

.silent-demo__layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: start;
}

.demo-card {
  padding: 1.5rem;
  border-radius: var(--radius-lg);
  background: #fff;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-card);
}

.demo-card__header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--color-border);
}

.demo-card__prompt {
  font-size: 1rem;
  margin: 0 0 1.25rem;
  line-height: 1.5;
}

.demo-card__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.demo-btn {
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: #fff;
  color: var(--color-text);
  font-size: 0.85rem;
  font-weight: 500;
  transition: all 0.25s;
}

.demo-btn:hover {
  border-color: var(--color-border-strong);
  background: var(--color-bg-subtle);
}

.demo-btn.is-selected {
  border-color: var(--color-accent);
  background: var(--color-accent-soft);
  color: var(--color-accent);
}

.demo-btn--decided.is-selected {
  border-color: var(--color-success);
  background: rgba(5, 150, 105, 0.1);
  color: var(--color-success);
}

.demo-btn--pending.is-selected {
  border-color: var(--color-warning);
  background: rgba(217, 119, 6, 0.1);
  color: var(--color-warning);
}

.demo-btn--reject.is-selected {
  border-color: var(--color-danger);
  background: rgba(220, 38, 38, 0.08);
  color: var(--color-danger);
}

.kb-preview {
  padding: 1.5rem;
  border-radius: var(--radius-lg);
  background: #fff;
  border: 1px solid var(--color-border);
  font-family: "DM Sans", monospace;
  font-size: 0.85rem;
  box-shadow: var(--shadow-soft);
}

.kb-preview__title {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: 1rem;
}

.kb-row {
  display: flex;
  gap: 0.75rem;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--color-border);
}

.kb-row:last-child {
  border-bottom: none;
}

.kb-key {
  color: var(--color-accent);
  min-width: 5rem;
  font-weight: 600;
}

.kb-value {
  color: var(--color-text-muted);
  transition: color 0.3s;
}

.kb-value.is-updated {
  color: var(--color-text);
  animation: kbFlash 0.6s ease;
}

@keyframes kbFlash {
  0% {
    background: var(--color-accent-soft);
  }
  100% {
    background: transparent;
  }
}

/* —— BYOK —— */
.byok {
  padding: clamp(4rem, 10vw, 7rem) 0;
  background: var(--color-bg);
}

.byok__content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  align-items: center;
}

.byok__points {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
}

.byok__points li {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 1rem;
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

.byok__points li i {
  color: var(--color-accent);
  margin-top: 0.2rem;
}

.byok .section-desc {
  text-align: left;
  margin-top: 1rem;
}

.model-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
}

.model-chip {
  padding: 1rem;
  border-radius: var(--radius-md);
  background: #fff;
  border: 1px solid var(--color-border);
  text-align: center;
  font-size: 0.85rem;
  box-shadow: var(--shadow-soft);
  transition: border-color 0.3s, transform 0.3s, box-shadow 0.3s;
}

.model-chip:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-card);
}

.model-chip__label {
  display: block;
  font-size: 0.7rem;
  color: var(--color-text-muted);
  margin-bottom: 0.25rem;
}

.model-chip__name {
  font-weight: 600;
  color: var(--color-accent);
}

/* —— Roadmap —— */
.roadmap {
  padding: clamp(3rem, 8vw, 5rem) 0;
  background: var(--color-bg-subtle);
}

.roadmap__pills {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.65rem;
  margin-bottom: 1.5rem;
}

.roadmap-pill {
  padding: 0.5rem 1rem;
  border-radius: 999px;
  font-size: 0.8rem;
  background: #fff;
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  box-shadow: var(--shadow-soft);
}

.roadmap__note {
  text-align: center;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  max-width: 32rem;
  margin-inline: auto;
}

/* —— FAQ —— */
.faq {
  padding: clamp(4rem, 10vw, 7rem) 0;
  background: var(--color-bg);
}

.faq__list {
  max-width: 40rem;
  margin-inline: auto;
}

.faq-item {
  border-bottom: 1px solid var(--color-border);
}

.faq-item__question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.25rem 0;
  background: none;
  border: none;
  color: var(--color-text);
  font-size: 1rem;
  font-weight: 600;
  text-align: left;
}

.faq-item__question i {
  color: var(--color-accent);
  transition: transform 0.35s var(--ease-out);
  flex-shrink: 0;
}

.faq-item.is-open .faq-item__question i {
  transform: rotate(180deg);
}

.faq-item__answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s var(--ease-out), padding 0.4s;
}

.faq-item.is-open .faq-item__answer {
  max-height: 24rem;
  padding-bottom: 1.25rem;
}

.faq-item__answer p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* —— Waitlist —— */
.waitlist {
  padding: clamp(4rem, 10vw, 7rem) 0;
  background: var(--color-bg-subtle);
}

.waitlist__box {
  max-width: 28rem;
  margin-inline: auto;
  padding: 2.5rem;
  border-radius: var(--radius-lg);
  background: #fff;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-card);
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 0.4rem;
  color: var(--color-text-muted);
}

.form-group label .required {
  color: var(--color-accent);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: #fff;
  color: var(--color-text);
  font-family: inherit;
  font-size: 0.95rem;
  transition: border-color 0.25s, box-shadow 0.25s;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-soft);
}

.form-group textarea {
  min-height: 4rem;
  resize: vertical;
}

.waitlist__box .btn--primary {
  width: 100%;
  margin-top: 0.5rem;
}

.form-note {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  text-align: center;
  margin-top: 1rem;
}

/* —— Footer —— */
.site-footer {
  padding: 2.5rem clamp(1.25rem, 4vw, 2.5rem) 3rem;
  border-top: 1px solid var(--color-border);
  text-align: center;
  background: var(--color-bg);
}

.site-footer__brand {
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.site-footer__copy {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin: 0;
}

.site-footer__photo {
  font-size: 0.7rem;
  color: var(--color-text-muted);
  margin: 0.5rem 0 0;
  opacity: 0.75;
}

.site-footer__photo a {
  color: var(--color-accent);
  text-decoration: underline;
}

/* —— Toast —— */
.toast {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 200;
  padding: 1rem 1.5rem;
  border-radius: var(--radius-md);
  background: #fff;
  border: 1px solid var(--color-success);
  color: var(--color-text);
  font-size: 0.9rem;
  box-shadow: var(--shadow-card);
  transform: translateX(calc(100% + 2rem));
  opacity: 0;
  transition: transform 0.4s var(--ease-out), opacity 0.4s;
}

.toast.is-visible {
  transform: translateX(0);
  opacity: 1;
}

.toast i {
  color: var(--color-success);
  margin-right: 0.5rem;
}

/* —— Responsive —— */
@media (min-width: 901px) and (max-width: 1200px) {
  .hero__grid {
    grid-template-columns: 1.15fr 0.85fr;
  }
}

@media (max-width: 1100px) and (min-width: 901px) {
  .problem__grid,
  .features__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 900px) {
  .hero-bg__overlay {
    background: linear-gradient(
      180deg,
      rgba(255, 255, 255, 0.94) 0%,
      rgba(255, 255, 255, 0.88) 55%,
      rgba(255, 255, 255, 0.75) 100%
    );
  }

  .hero-bg__img {
    object-position: center;
  }

  .hero__title-lockup {
    align-items: center;
    width: 100%;
  }

  .hero__title-row--punch {
    justify-content: center;
  }

  .hero__grid {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero__lead {
    margin-inline: auto;
  }

  .hero__actions {
    justify-content: center;
  }

  .hero__visual {
    order: -1;
  }

  .cycle-diagram {
    width: min(100%, 16rem);
  }

  .cycle-node {
    font-size: 0.58rem;
    padding: 0.28rem 0.45rem;
    max-width: 4.75rem;
  }

  .byok .section-desc,
  .byok .section-title {
    text-align: center;
  }

  .problem__grid,
  .features__grid {
    grid-template-columns: 1fr;
  }

  .compare__grid {
    grid-template-columns: 1fr;
  }

  .compare__col--hall {
    order: -1;
  }

  .silent-demo__layout,
  .byok__content {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .site-nav {
    display: none;
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-card);
  }

  .site-nav.is-open {
    display: flex;
  }

  .nav-toggle {
    display: block;
  }

  .hide-mobile {
    display: none;
  }
}

@media (max-width: 640px) {
  .hero__title {
    --hero-size-xl: clamp(2.15rem, 8.8vw, 2.55rem);
    --hero-size-lg: clamp(1.75rem, 7vw, 2.05rem);
    --hero-size-sm: clamp(0.78rem, 3.1vw, 0.92rem);
    margin-bottom: 1.25rem;
  }

  .hero__title-row--main {
    flex-wrap: wrap;
    justify-content: center;
    line-height: 1.12;
  }

  .hero__title-row--punch {
    margin-top: 0.58em;
    justify-content: center;
  }

  .hero__title-ai {
    font-size: 1.24em;
    letter-spacing: 0.08em;
  }

  .toast {
    left: 1rem;
    right: 1rem;
    bottom: 1rem;
    transform: translateY(calc(100% + 1rem));
  }

  .toast.is-visible {
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }

  .fade-in {
    opacity: 1;
    transform: none;
  }

  .hero__lead,
  .hero__actions,
  .hero__visual {
    animation: none;
    opacity: 1;
  }
}