/* ============================================
   YUMMY LABS — DESIGN OS STYLES
   ============================================ */

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-text-primary);
  background: var(--color-bg-light);
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; }
ul { list-style: none; }

/* === UTILITIES === */
.container {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.text-accent {
  color: var(--color-accent);
  font-style: italic;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* === SECTIONS === */
.section {
  padding-block: var(--section-pad-y);
  position: relative;
}

.section--dark {
  background: var(--color-bg-dark);
  color: var(--color-text-inverse);
}

.section--light {
  background: var(--color-bg-light);
  color: var(--color-text-primary);
}

.section--accent {
  background: var(--color-bg-accent);
  color: var(--color-text-inverse);
}

.section__header {
  margin-bottom: var(--space-12);
}

.section__header--center {
  text-align: center;
}

.section__title {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--weight-bold);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  margin-top: var(--space-4);
}

/* === PILL / BADGE === */
.pill {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
}

.pill--purple {
  background: var(--color-purple);
  color: var(--color-white);
}

.pill--outline {
  background: transparent;
  border: 1px solid var(--color-text-muted);
  color: var(--color-text-muted);
}

/* === BUTTONS === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: var(--weight-semibold);
  text-decoration: none;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--duration-base) var(--ease-out);
  white-space: nowrap;
}

.btn__arrow {
  transition: transform var(--duration-base) var(--ease-out);
  display: inline-block;
}

.btn:hover .btn__arrow {
  transform: translateX(4px);
}

.btn--primary {
  background: var(--color-cta-primary);
  color: var(--color-white);
}

.btn--primary:hover {
  background: var(--color-cta-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(34, 22, 255, 0.3);
}

.btn--secondary {
  background: var(--color-white);
  color: var(--color-brown);
}

.btn--secondary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.btn--outline {
  background: transparent;
  border-color: currentColor;
  color: inherit;
}

.btn--outline:hover {
  background: rgba(255, 255, 255, 0.08);
  transform: translateY(-2px);
}

.section--light .btn--outline {
  border-color: var(--color-brown);
  color: var(--color-brown);
}

.section--light .btn--outline:hover {
  background: var(--color-brown);
  color: var(--color-white);
}

.btn--sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
}

.btn--lg {
  padding: var(--space-6) var(--space-12);
  font-size: var(--text-lg);
}

.btn--full {
  width: 100%;
}

.btn:focus-visible,
a:focus-visible {
  outline: 3px solid var(--color-purple-light);
  outline-offset: 3px;
}

/* === CARDS === */
.card {
  background: var(--color-white);
  border: 1px solid rgba(50, 1, 1, 0.08);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: all var(--duration-base) var(--ease-out);
}

.card:hover {
  box-shadow: var(--shadow-hover);
}

.card__icon {
  color: var(--color-purple);
  margin-bottom: var(--space-4);
}

.card__title {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-bold);
  margin-bottom: var(--space-3);
  line-height: var(--leading-snug);
}

.card__body {
  color: var(--color-text-muted);
  line-height: var(--leading-relaxed);
  font-size: var(--text-sm);
}

.card--elevated {
  border-color: var(--color-purple);
  box-shadow: var(--shadow-card);
  position: relative;
}

.card__badge {
  position: absolute;
  top: calc(-1 * var(--space-3));
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-purple);
  color: var(--color-white);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-wide);
  padding: var(--space-1) var(--space-4);
  border-radius: var(--radius-pill);
  text-transform: uppercase;
  white-space: nowrap;
}

.card__tier-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  margin-bottom: var(--space-3);
}

.card--tier .card__title {
  font-size: var(--text-lg);
  margin-bottom: var(--space-4);
}

.card--tier .card__body {
  margin-bottom: var(--space-8);
  min-height: 4.5em;
}

/* === NAV === */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: var(--space-4) 0;
  background: rgba(50, 1, 1, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__logo {
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.nav__logo-img {
  width: 32px;
  height: 32px;
  border-radius: 50%;
}

.nav__logo-text {
  font-family: var(--font-heading);
  font-weight: var(--weight-bold);
  font-size: var(--text-sm);
  color: var(--color-white);
  letter-spacing: var(--tracking-wide);
}

.nav .btn--outline {
  color: var(--color-white);
  border-color: rgba(255, 255, 255, 0.3);
}

.nav .btn--outline:hover {
  border-color: var(--color-white);
  background: rgba(255, 255, 255, 0.1);
}

/* === HERO === */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: calc(var(--section-pad-y) + 60px);
  overflow: hidden;
}

.hero__inner {
  position: relative;
  z-index: 2;
}

.hero__headline {
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--weight-extrabold);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  margin-bottom: var(--space-6);
}

.hero__sub {
  font-size: var(--text-lg);
  color: rgba(255, 255, 255, 0.7);
  max-width: 50ch;
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-10);
}

.hero__ctas {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  flex-wrap: wrap;
}

.hero__scroll-link {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.65);
  text-decoration: none;
  transition: color var(--duration-base) var(--ease-out);
  margin-top: var(--space-4);
}

.hero__scroll-link:hover {
  color: rgba(255, 255, 255, 0.9);
}

.hero__glow {
  position: absolute;
  top: 20%;
  left: 50%;
  width: 800px;
  height: 800px;
  transform: translate(-50%, -30%);
  background:
    radial-gradient(ellipse at 30% 50%, rgba(255, 107, 53, 0.08) 0%, transparent 60%),
    radial-gradient(ellipse at 70% 40%, rgba(88, 79, 255, 0.1) 0%, transparent 60%);
  pointer-events: none;
  z-index: 1;
}

.footer__glow {
  position: absolute;
  bottom: 10%;
  left: 50%;
  width: 600px;
  height: 600px;
  transform: translate(-50%, 20%);
  background:
    radial-gradient(ellipse at 40% 60%, rgba(255, 107, 53, 0.06) 0%, transparent 60%),
    radial-gradient(ellipse at 60% 40%, rgba(88, 79, 255, 0.08) 0%, transparent 60%);
  pointer-events: none;
  z-index: 0;
}

/* === PAIN POINTS === */
.pain__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

.pain__item {
  padding: var(--space-6) var(--space-8);
  border-radius: var(--radius-md);
  border: 1px solid rgba(50, 1, 1, 0.06);
  background: var(--color-white);
  transition: all var(--duration-base) var(--ease-out);
}

.pain__item:hover {
  border-color: rgba(50, 1, 1, 0.12);
  box-shadow: 0 2px 12px rgba(50, 1, 1, 0.04);
}

.pain__number {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  display: block;
  margin-bottom: var(--space-2);
}

.pain__title {
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: var(--weight-bold);
  margin-bottom: var(--space-2);
  line-height: var(--leading-snug);
  color: var(--color-brown);
}

.pain__body {
  color: var(--color-text-muted);
  line-height: var(--leading-relaxed);
  font-size: var(--text-sm);
}

/* === SOLUTION === */
.solution__pillars {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  margin-bottom: var(--space-12);
}

.pillar {
  padding: var(--space-6);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: all var(--duration-base) var(--ease-out);
}

.pillar:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-2px);
}

.pillar__number {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-accent);
  letter-spacing: var(--tracking-wider);
  margin-bottom: var(--space-3);
}

.pillar__title {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-bold);
  margin-bottom: var(--space-2);
}

.pillar__body {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.8);
  line-height: var(--leading-relaxed);
}

/* === DEMO: Claude Window with Chat + Artifact === */
.demo {
  margin-bottom: var(--space-16);
}

.demo__window {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.demo__panels {
  display: flex;
  flex-direction: column;
}

.demo__chat {
  flex: 1;
}

.demo__chat-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  flex-wrap: wrap;
}

.demo__claude-mark {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-heading);
  font-weight: var(--weight-semibold);
  font-size: var(--text-sm);
  color: var(--color-white);
  letter-spacing: 0.01em;
}

.demo__claude-logo {
  width: 18px;
  height: 18px;
  border-radius: 4px;
}

.demo__context {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.demo__tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: rgba(255, 255, 255, 0.5);
  background: rgba(255, 255, 255, 0.06);
  padding: 2px 8px;
  border-radius: var(--radius-pill);
}

.demo__tag svg { opacity: 0.5; }

/* User message */
.demo__message {
  padding: var(--space-4) var(--space-6);
}

.demo__message--user {
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  min-height: 60px;
}

/* User avatar + name + role */
.demo__user-meta {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
}

.demo__user-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: linear-gradient(135deg, #f59e0b, #f97316);
  color: var(--color-white);
  font-family: var(--font-heading);
  font-size: 0.7rem;
  font-weight: var(--weight-bold);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.demo__user-name {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: var(--weight-semibold);
  color: rgba(255, 255, 255, 0.9);
}

.demo__user-role {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  color: rgba(255, 255, 255, 0.4);
  background: rgba(255, 255, 255, 0.08);
  padding: 1px 6px;
  border-radius: var(--radius-pill);
}

.demo__text {
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  color: rgba(255, 255, 255, 0.85);
}

.demo__cursor {
  color: var(--color-accent);
  font-weight: var(--weight-bold);
  animation: blink 0.8s step-end infinite;
}

@keyframes blink {
  50% { opacity: 0; }
}

/* Checklist sequence */
.demo__checklist {
  padding: var(--space-3) var(--space-6);
  display: flex;
  flex-direction: column;
  gap: 6px;
  opacity: 0;
  transition: opacity 300ms var(--ease-out);
}

.demo__checklist.is-visible {
  opacity: 1;
}

.demo__check-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 300ms var(--ease-out), transform 300ms var(--ease-out);
}

.demo__check-item.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.demo__check-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  color: transparent;
  flex-shrink: 0;
  transition: background 300ms ease, color 300ms ease;
}

.demo__check-item.is-checked .demo__check-icon {
  background: rgba(74, 222, 128, 0.2);
  color: #4ade80;
}

.demo__check-label {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  color: rgba(255, 255, 255, 0.35);
  transition: color 300ms ease;
}

.demo__check-item.is-checked .demo__check-label {
  color: rgba(255, 255, 255, 0.55);
}

/* Claude response */
.demo__response {
  padding: var(--space-4) var(--space-6) var(--space-6);
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 500ms var(--ease-out), transform 500ms var(--ease-out);
}

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

.demo__response-text {
  font-size: var(--text-xs);
  line-height: var(--leading-relaxed);
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: var(--space-4);
}

/* Artifact panel (right side on desktop, below chat on mobile) */
.demo__artifact {
  overflow: hidden;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 500ms var(--ease-out), transform 500ms var(--ease-out);
  padding: var(--space-4);
  display: flex;
  align-items: stretch;
}

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

/* Rounded frame that wraps the artifact header + preview */
.demo__artifact-frame {
  flex: 1;
  background: #faf9f7;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(50, 1, 1, 0.1);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08), 0 1px 4px rgba(0, 0, 0, 0.04);
  display: flex;
  flex-direction: column;
}

/* Artifact header — matches Claude's artifact title bar */
.demo__artifact-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: 8px var(--space-4);
  background: var(--color-white);
  border-bottom: 1px solid rgba(50, 1, 1, 0.08);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.demo__artifact-title {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: var(--weight-semibold);
  color: var(--color-brown);
  margin-right: auto;
}

.demo__artifact-tabs {
  display: flex;
  background: rgba(50, 1, 1, 0.04);
  border-radius: 6px;
  padding: 2px;
  gap: 2px;
}

.demo__artifact-tab {
  font-family: var(--font-body);
  font-size: 0.6rem;
  padding: 3px 10px;
  border-radius: 4px;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all 150ms ease;
}

.demo__artifact-tab--active {
  background: var(--color-white);
  color: var(--color-brown);
  font-weight: var(--weight-medium);
  box-shadow: 0 1px 2px rgba(50, 1, 1, 0.06);
}

.demo__artifact-actions {
  display: flex;
  align-items: center;
  gap: 6px;
}

.demo__artifact-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border: none;
  background: transparent;
  border-radius: 4px;
  color: rgba(50, 1, 1, 0.35);
  cursor: pointer;
  transition: background 150ms ease, color 150ms ease;
}

.demo__artifact-btn:hover {
  background: rgba(50, 1, 1, 0.06);
  color: var(--color-brown);
}

.demo__artifact-btn--share {
  width: auto;
  gap: 4px;
  padding: 0 8px;
}

.demo__artifact-btn-label {
  font-family: var(--font-body);
  font-size: 0.6rem;
  font-weight: var(--weight-medium);
}

/* Preview viewport — the live rendered content */
.demo__preview {
  background: var(--color-white);
  overflow: hidden;
  box-shadow: inset 0 2px 8px rgba(50, 1, 1, 0.03);
}

/* Prototype screen inside artifact */
.demo__screen {
  padding: var(--space-6) var(--space-6) var(--space-6);
  background: linear-gradient(180deg, #f8f6f3 0%, var(--color-neutral) 100%);
  min-height: 280px;
}

.demo__ui-hero {
  text-align: center;
  margin-bottom: var(--space-4);
}

.demo__ui-heading {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: var(--weight-extrabold);
  color: var(--color-brown);
  margin-bottom: 4px;
  letter-spacing: -0.01em;
}

.demo__ui-subheading {
  font-size: 0.65rem;
  color: var(--color-text-muted);
}

.demo__ui-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
}

@media (min-width: 480px) {
  .demo__ui-cards {
    grid-template-columns: repeat(2, 1fr);
  }
}

.demo__ui-card {
  background: var(--color-white);
  border: 1px solid rgba(50, 1, 1, 0.08);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  box-shadow: 0 1px 3px rgba(50, 1, 1, 0.04), 0 4px 12px rgba(50, 1, 1, 0.03);
  transition: transform 300ms var(--ease-out), box-shadow 300ms var(--ease-out);
  cursor: default;
}

.demo__ui-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(50, 1, 1, 0.08), 0 8px 24px rgba(50, 1, 1, 0.04);
}

.demo__ui-card--featured {
  border-color: var(--color-purple);
  box-shadow: 0 2px 8px rgba(88, 79, 255, 0.1), 0 8px 24px rgba(88, 79, 255, 0.06);
}

.demo__ui-card--featured:hover {
  box-shadow: 0 4px 16px rgba(88, 79, 255, 0.15), 0 12px 32px rgba(88, 79, 255, 0.08);
}

.demo__ui-recommended {
  font-family: var(--font-mono);
  font-size: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-purple);
  background: rgba(88, 79, 255, 0.08);
  padding: 1px 5px;
  border-radius: var(--radius-pill);
  align-self: flex-start;
}

.demo__ui-plan-name {
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: var(--weight-bold);
  color: var(--color-brown);
}

.demo__ui-price {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: var(--weight-extrabold);
  color: var(--color-brown);
  line-height: 1;
}

.demo__ui-price span {
  font-size: 0.6em;
  font-weight: var(--weight-regular);
  color: var(--color-text-muted);
}

.demo__ui-divider {
  height: 1px;
  background: rgba(50, 1, 1, 0.08);
  margin: var(--space-2) 0;
}

.demo__ui-features {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin: var(--space-1) 0;
}

.demo__ui-feat {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.6rem;
  color: var(--color-text-muted);
  line-height: 1.4;
}

.demo__ui-check {
  color: var(--color-green);
  font-size: 0.55rem;
  flex-shrink: 0;
  font-weight: 700;
}

.demo__ui-check--accent {
  color: var(--color-purple);
}

.demo__ui-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 28px;
  border-radius: 6px;
  border: 1.5px solid var(--color-brown);
  margin-top: auto;
  font-family: var(--font-heading);
  font-size: 0.55rem;
  font-weight: var(--weight-semibold);
  color: var(--color-brown);
  cursor: pointer;
  transition: background 200ms ease, color 200ms ease, transform 150ms ease;
}

.demo__ui-btn:hover {
  background: var(--color-brown);
  color: var(--color-white);
  transform: scale(1.02);
}

.demo__ui-btn--primary {
  background: var(--color-cta-primary);
  border-color: var(--color-cta-primary);
  color: var(--color-white);
}

.demo__ui-btn--primary:hover {
  background: #1a0ed4;
  border-color: #1a0ed4;
}

/* Artifact element stagger */
.demo__screen > *,
.demo__ui-card {
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 350ms var(--ease-out), transform 350ms var(--ease-out);
}

.demo__artifact.is-visible .demo__screen > *,
.demo__artifact.is-visible .demo__ui-card {
  opacity: 1;
  transform: translateY(0);
}

.demo__artifact.is-visible .demo__ui-hero { transition-delay: 200ms; }
.demo__artifact.is-visible .demo__ui-cards { opacity: 1; transform: translateY(0); transition-delay: 350ms; }
.demo__artifact.is-visible .demo__ui-card:nth-child(1) { transition-delay: 400ms; }
.demo__artifact.is-visible .demo__ui-card:nth-child(2) { transition-delay: 550ms; }

.solution__outcome {
  text-align: center;
}

.solution__result {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--weight-semibold);
  margin-bottom: var(--space-8);
  line-height: var(--leading-snug);
}

/* === BEFORE / AFTER === */
.shift__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

.shift__col {
  padding: var(--space-6);
  border-radius: var(--radius-lg);
}

.shift__col--before {
  background: rgba(234, 71, 95, 0.04);
  border: 1px solid rgba(234, 71, 95, 0.15);
}

.shift__col--after {
  background: rgba(8, 216, 215, 0.04);
  border: 1px solid rgba(8, 216, 215, 0.2);
}

.shift__label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  margin-bottom: var(--space-6);
}

.shift__col--before .shift__label { color: var(--color-red); }
.shift__col--after .shift__label { color: var(--color-green); }

.shift__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.shift__list li {
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  padding-left: var(--space-6);
  position: relative;
}

.shift__list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.shift__col--before .shift__list li::before {
  background: var(--color-red);
  opacity: 0.4;
}

.shift__col--after .shift__list li::before {
  background: var(--color-green);
}

/* === TIERS === */
.tiers__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

.tiers__grid .card--tier {
  display: flex;
  flex-direction: column;
}

.tiers__grid .btn {
  margin-top: auto;
}

/* === PROOF === */
.proof {
  padding-block: var(--space-12);
  border-top: 1px solid rgba(50, 1, 1, 0.06);
}

.proof__text {
  text-align: center;
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 50ch;
  margin-inline: auto;
  line-height: var(--leading-relaxed);
}

/* === FOOTER === */
.footer {
  text-align: center;
  overflow: hidden;
}

.footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-8);
}

.footer__headline {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--weight-extrabold);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
}

.footer__meta {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-top: var(--space-8);
}

.footer__link {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.6);
  text-decoration: none;
  transition: color var(--duration-fast);
}

.footer__link:hover {
  color: var(--color-white);
}

.footer__divider {
  color: rgba(255, 255, 255, 0.2);
}

/* === ANIMATIONS === */
.animate-in {
  opacity: 0;
  transform: translateY(30px) scale(0.97);
  transition:
    opacity var(--duration-slow) var(--ease-out),
    transform 600ms var(--ease-out);
  transition-delay: var(--delay, 0ms);
}

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

/* Hero text stagger */
.hero__line {
  display: block;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 600ms var(--ease-out), transform 600ms var(--ease-out);
}

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

/* Accent text shimmer */
@keyframes shimmer {
  0%   { background-position: -200% center; }
  100% { background-position: 200% center; }
}

.text-accent {
  background: linear-gradient(
    90deg,
    var(--color-accent) 0%,
    var(--color-accent) 40%,
    #feffc0 50%,
    var(--color-accent) 60%,
    var(--color-accent) 100%
  );
  background-size: 200% auto;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: shimmer 4s ease-in-out infinite;
  animation-delay: 1.5s;
}

/* Pillar count-up */
.pillar__number {
  font-variant-numeric: tabular-nums;
}

/* === RESPONSIVE === */

/* Tablet (810px+) */
@media (min-width: 810px) {
  .pain__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .solution__pillars {
    grid-template-columns: repeat(2, 1fr);
  }

  .demo__panels {
    flex-direction: row;
  }

  .demo__chat {
    flex: 2;
    min-width: 0;
    max-width: 380px;
  }

  .demo__artifact {
    flex: 3;
    min-width: 0;
    border-top: none;
    border-left: 1px solid rgba(50, 1, 1, 0.1);
    transform: translateX(12px);
  }

  .demo__artifact.is-visible {
    transform: translateX(0);
  }

  .shift__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .tiers__grid {
    grid-template-columns: repeat(3, 1fr);
    align-items: start;
  }

  .card--elevated {
    transform: scale(1.03);
  }

  .section__title {
    font-size: var(--text-2xl);
  }

  .hero__headline {
    font-size: var(--text-3xl);
  }
}

/* Desktop (1400px+) */
@media (min-width: 1400px) {
  .pain__grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .solution__pillars {
    grid-template-columns: repeat(4, 1fr);
  }

  .container {
    padding-inline: var(--space-8);
  }

  .hero__headline {
    font-size: clamp(3rem, 2.2rem + 4vw, 5rem);
    max-width: 80%;
  }
}

/* Large screens (2000px+) */
@media (min-width: 2000px) {
  .container {
    max-width: 1440px;
  }
}