:root {
  color-scheme: light dark;
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --bg: #f5faf8;
  --surface: rgba(0, 0, 0, 0.02);
  --surface-strong: rgba(0, 0, 0, 0.05);
  --text: #0d1a16;
  --muted: rgba(13, 26, 22, 0.65);
  --faint: rgba(0, 0, 0, 0.03);
  --line: rgba(0, 0, 0, 0.08);
  --accent: #2b856c;
  --accent-2: #3f82d1;
  --accent-3: #7ab840;
  --shadow: rgba(0, 20, 10, 0.06);
  --glow: rgba(43, 133, 108, 0.2);
  --btn-text: #ffffff;
  --radius: 24px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --theme-speed: 800ms;
}

body[data-mood="calm"] {
  color-scheme: light;
  --ease: cubic-bezier(0.4, 0, 0.2, 1); /* Slow, gentle */
  --theme-speed: 1000ms;
}

body[data-mood="focus"] {
  color-scheme: dark;
  --bg: #080b12;
  --surface: rgba(240, 245, 255, 0.075);
  --surface-strong: rgba(240, 245, 255, 0.13);
  --text: #f7f9ff;
  --muted: rgba(247, 249, 255, 0.66);
  --faint: rgba(247, 249, 255, 0.09);
  --line: rgba(247, 249, 255, 0.16);
  --accent: #78a7ff;
  --accent-2: #f1cf6a;
  --accent-3: #8ddcff;
  --shadow: rgba(0, 8, 24, 0.58);
  --glow: rgba(120, 167, 255, 0.24);
  --btn-text: #080b12;
  --ease: cubic-bezier(0, 0, 0.2, 1); /* Sharp, instant-like */
  --theme-speed: 400ms;
}

body[data-mood="energy"] {
  color-scheme: dark;
  --bg: #12080d;
  --surface: rgba(255, 247, 241, 0.085);
  --surface-strong: rgba(255, 247, 241, 0.15);
  --text: #fff8f3;
  --muted: rgba(255, 248, 243, 0.68);
  --faint: rgba(255, 248, 243, 0.1);
  --line: rgba(255, 248, 243, 0.17);
  --accent: #ff6f91;
  --accent-2: #ffd166;
  --accent-3: #4ee6c2;
  --shadow: rgba(29, 4, 14, 0.52);
  --glow: rgba(255, 111, 145, 0.27);
  --btn-text: #12080d;
  --ease: cubic-bezier(0.34, 1.56, 0.64, 1); /* Springy bounce */
  --theme-speed: 600ms;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 18% 12%, color-mix(in srgb, var(--accent) 26%, transparent), transparent 28rem),
    radial-gradient(circle at 82% 8%, color-mix(in srgb, var(--accent-2) 20%, transparent), transparent 26rem),
    linear-gradient(135deg, var(--bg), color-mix(in srgb, var(--bg) 86%, var(--accent) 14%));
  color: var(--text);
  transition: background var(--theme-speed) var(--ease), color var(--theme-speed) var(--ease);
}

button,
a {
  font: inherit;
}

button {
  cursor: pointer;
}

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

.site-shell {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
}

.topbar {
  position: sticky;
  top: 16px;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-top: 16px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: color-mix(in srgb, var(--bg) 72%, transparent);
  box-shadow: 0 24px 70px var(--shadow);
  backdrop-filter: blur(24px);
  transition: background var(--theme-speed) var(--ease), border-color var(--theme-speed) var(--ease), box-shadow var(--theme-speed) var(--ease);
}

.brand,
.topbar nav,
.hero-actions,
.app-top,
.status-pill,
.mood-toggle {
  display: flex;
  align-items: center;
}

.brand {
  gap: 10px;
  font-weight: 750;
  letter-spacing: 0;
}

.brand-mark {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background:
    linear-gradient(135deg, var(--accent), var(--accent-2)),
    var(--surface);
  box-shadow: 0 0 28px var(--glow);
}

.topbar nav {
  gap: 8px;
}

.topbar nav a,
.topbar-action,
.secondary-action {
  color: var(--muted);
  transition: color 250ms var(--ease), background 250ms var(--ease), transform 250ms var(--ease);
}

.topbar nav a {
  padding: 10px 12px;
  border-radius: 999px;
  font-size: 0.92rem;
}

.topbar nav a:hover,
.topbar-action:hover,
.secondary-action:hover {
  color: var(--text);
  background: var(--surface);
}

.topbar-action,
.primary-action,
.secondary-action,
.mood-button {
  border: 0;
  border-radius: 999px;
}

.topbar-action {
  padding: 10px 16px;
  background: var(--surface);
}

.hero {
  min-height: calc(100vh - 90px);
  padding: 120px 0 100px;
  align-items: center;
}

.section-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(360px, 1.05fr);
  gap: clamp(40px, 8vw, 110px);
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
h3,
h4,
p {
  margin-top: 0;
}

h1 {
  max-width: 780px;
  margin-bottom: 32px;
  font-size: clamp(3rem, 8vw, 6.8rem);
  line-height: 0.92;
  letter-spacing: -0.01em;
}

.hero-subheading,
.mood-copy p,
.study-panel p,
.cta p {
  color: var(--muted);
  font-size: clamp(1rem, 1.5vw, 1.18rem);
  line-height: 1.8;
}

.hero-actions {
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.primary-action,
.secondary-action {
  min-height: 48px;
  padding: 0 22px;
  font-weight: 750;
}

.primary-action {
  position: relative;
  overflow: hidden;
  color: var(--btn-text);
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 18px 48px var(--glow);
  transform: translate(var(--mag-x, 0), var(--mag-y, 0)) scale(1);
  transition: transform 300ms var(--ease) 50ms, box-shadow 300ms var(--ease) 50ms, filter 300ms var(--ease) 50ms;
}

.primary-action:hover {
  transform: translate(var(--mag-x, 0), var(--mag-y, 0)) scale(1.03);
  filter: saturate(1.08);
  box-shadow: 0 20px 40px var(--glow), 0 0 20px color-mix(in srgb, var(--accent) 40%, transparent);
  transition: transform 100ms ease-out, box-shadow var(--theme-speed) var(--ease), filter var(--theme-speed) var(--ease);
}

.secondary-action {
  position: relative;
  overflow: hidden;
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--line);
  background: var(--surface);
  transform: translate(var(--mag-x, 0), var(--mag-y, 0)) scale(1);
  transition: transform 300ms var(--ease) 50ms, box-shadow 300ms var(--ease) 50ms, background 300ms var(--ease) 50ms;
}

.secondary-action:hover {
  transform: translate(var(--mag-x, 0), var(--mag-y, 0)) scale(1.03);
  box-shadow: 0 12px 24px var(--shadow);
  transition: transform 100ms ease-out, box-shadow var(--theme-speed) var(--ease), background var(--theme-speed) var(--ease);
}

.preview-wrap {
  position: relative;
  isolation: isolate;
}

.preview-orbit {
  position: absolute;
  inset: 9% 4%;
  z-index: -1;
  border: 1px solid color-mix(in srgb, var(--accent) 42%, transparent);
  border-radius: 42% 58% 48% 52%;
  opacity: 0.7;
  animation: orbit 10s linear infinite;
}

.app-frame {
  display: flex;
  gap: clamp(12px, 2vw, 24px);
  width: min(100%, 580px);
  margin-left: auto;
  padding: clamp(16px, 2.5vw, 24px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(145deg, var(--surface-strong), color-mix(in srgb, var(--bg) 72%, transparent)),
    color-mix(in srgb, var(--bg) 78%, transparent);
  box-shadow: 0 34px 100px var(--shadow), inset 0 1px 0 rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(26px);
  transform: perspective(1000px) rotateX(var(--rotateX, 0deg)) rotateY(var(--rotateY, 0deg));
  transform-style: preserve-3d;
  will-change: transform;
  transition: transform 100ms ease-out, border-color var(--theme-speed) var(--ease), background var(--theme-speed) var(--ease), box-shadow var(--theme-speed) var(--ease);
}

body[data-mood="calm"] .app-frame {
  animation: calmFloat 8s ease-in-out infinite;
}

@keyframes calmFloat {
  0%, 100% {
    transform: perspective(1000px) rotateX(var(--rotateX, 0deg)) rotateY(var(--rotateY, 0deg)) translateY(0) scale(1);
  }
  50% {
    transform: perspective(1000px) rotateX(var(--rotateX, 0deg)) rotateY(var(--rotateY, 0deg)) translateY(-8px) scale(1.005);
  }
}

.app-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 22px;
}

.app-kicker,
.panel-label,
.metric-card span,
.feature-number,
.study-steps span {
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 750;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.app-top h2 {
  margin: 4px 0 0;
  font-size: clamp(1.45rem, 3vw, 2rem);
}

.status-pill {
  flex: 0 0 auto;
  gap: 8px;
  padding: 9px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  background: var(--surface);
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 8px color-mix(in srgb, var(--accent) 14%, transparent);
  animation: pulse 2.6s ease-in-out infinite;
}

.insight-panel {
  display: grid;
  grid-template-columns: 112px minmax(0, 1fr);
  gap: 20px;
  align-items: center;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: color-mix(in srgb, var(--surface) 72%, transparent);
}

.emotion-ring {
  display: grid;
  width: 104px;
  height: 104px;
  place-items: center;
  border-radius: 50%;
  background:
    radial-gradient(circle at center, color-mix(in srgb, var(--bg) 86%, transparent) 53%, transparent 54%),
    conic-gradient(var(--accent), var(--accent-2), var(--accent-3), var(--accent));
  box-shadow: 0 0 42px var(--glow);
}

.emotion-ring span {
  font-size: 2rem;
  font-weight: 800;
}

.insight-panel h3 {
  margin: 6px 0 8px;
  font-size: 1.1rem;
}

.insight-panel p,
.task-item p,
.feature-card p,
.study-steps p {
  color: var(--muted);
  line-height: 1.65;
}

.task-list {
  display: grid;
  gap: 12px;
  margin: 16px 0;
}

.task-item {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 14px;
  padding: 15px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: linear-gradient(145deg, var(--surface), color-mix(in srgb, var(--bg) 30%, transparent));
  box-shadow: 0 6px 16px var(--shadow), inset 0 1px 0 rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(10px);
  transition: transform 300ms var(--ease), border-color var(--theme-speed) var(--ease), background var(--theme-speed) var(--ease), box-shadow var(--theme-speed) var(--ease);
}

.task-item:hover,
.study-steps article:hover {
  transform: translateY(-6px) rotate(-1deg) scale(1.01);
  border-color: color-mix(in srgb, var(--accent) 56%, var(--line));
  box-shadow: 0 16px 40px var(--shadow);
}

.feature-card:hover {
  border-color: color-mix(in srgb, var(--accent) 56%, var(--line));
  box-shadow: 0 20px 40px var(--shadow);
}

.task-item.is-active {
  background: color-mix(in srgb, var(--surface-strong) 76%, transparent);
}

.task-icon {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 14px 30px var(--glow);
}

.task-item h4 {
  margin-bottom: 4px;
}

.mini-dashboard {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.metric-card {
  min-width: 0;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: linear-gradient(145deg, color-mix(in srgb, var(--bg) 68%, transparent), color-mix(in srgb, var(--surface) 60%, transparent));
  box-shadow: 0 6px 16px var(--shadow), inset 0 1px 0 rgba(255, 255, 255, 0.04);
  backdrop-filter: blur(12px);
  transition: transform 300ms var(--ease), background var(--theme-speed) var(--ease), border-color var(--theme-speed) var(--ease), box-shadow var(--theme-speed) var(--ease);
}

.metric-card:hover {
  transform: translateY(-4px) rotate(1deg) scale(1.02);
  box-shadow: 0 12px 24px var(--shadow);
}

.metric-card strong {
  display: block;
  margin-top: 8px;
  font-size: 1.22rem;
}

.features,
.mood-section,
.case-study,
.cta {
  padding: 82px 0;
}

.section-heading {
  max-width: 670px;
  margin-bottom: 28px;
}

.section-heading h2,
.mood-copy h2,
.study-panel h2,
.cta h2 {
  margin-bottom: 14px;
  font-size: clamp(2rem, 4.6vw, 4.4rem);
  line-height: 1;
  letter-spacing: 0;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.feature-card,
.study-steps article {
  border: 1px solid var(--line);
  border-radius: 20px;
  background: linear-gradient(145deg, var(--surface-strong), var(--surface));
  box-shadow: 0 8px 30px var(--shadow), inset 0 1px 0 rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(16px);
  transition: transform 500ms var(--ease) 50ms, border-color var(--theme-speed) var(--ease) 50ms, background var(--theme-speed) var(--ease) 50ms, box-shadow var(--theme-speed) var(--ease) 50ms;
}

.feature-card {
  min-height: 245px;
  padding: 24px;
  transform: perspective(1000px) rotateX(var(--rotateX, 0deg)) rotateY(var(--rotateY, 0deg));
  transform-style: preserve-3d;
  will-change: transform;
}

.feature-card:hover {
  transition: transform 100ms ease-out, border-color 300ms var(--ease), background 500ms var(--ease), box-shadow 300ms var(--ease);
}

.feature-card h3 {
  margin: 34px 0 12px;
  font-size: 1.35rem;
}

.mood-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 28px;
  align-items: end;
}

.mood-copy {
  max-width: 640px;
}

.mood-toggle {
  position: relative;
  gap: 6px;
  padding: 6px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
}

.mood-active-pill {
  position: absolute;
  top: 6px;
  bottom: 6px;
  left: var(--pill-left, 6px);
  width: var(--pill-width, 92px);
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 14px 30px var(--glow);
  transition: left 400ms cubic-bezier(0.34, 1.56, 0.64, 1), width 400ms var(--ease), background 400ms var(--ease), box-shadow 400ms var(--ease);
  z-index: 0;
  pointer-events: none;
}

.mood-button {
  position: relative;
  z-index: 1;
  min-width: 92px;
  padding: 13px 18px;
  color: var(--muted);
  background: transparent;
  overflow: hidden;
  transform: translate(var(--mag-x, 0), var(--mag-y, 0)) scale(1);
  transition: color 250ms var(--ease), transform 300ms var(--ease);
}

.mood-button:hover {
  color: var(--text);
  transform: translate(var(--mag-x, 0), var(--mag-y, 0)) scale(1.05);
  transition: color 250ms var(--ease), transform 100ms ease-out;
}

.mood-button.is-selected {
  color: var(--btn-text);
}

.impact-section {
  padding: 82px 0;
}

.impact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.impact-card {
  padding: 36px 32px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: linear-gradient(145deg, var(--surface-strong), var(--surface));
  box-shadow: 0 12px 34px var(--shadow), inset 0 1px 0 rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(16px);
  transition: transform 300ms var(--ease), border-color var(--theme-speed) var(--ease), background var(--theme-speed) var(--ease), box-shadow var(--theme-speed) var(--ease);
}

.impact-card:hover {
  transform: translateY(-8px);
  border-color: color-mix(in srgb, var(--accent) 56%, var(--line));
  box-shadow: 0 16px 40px var(--shadow);
}

.impact-value {
  font-size: 3.8rem;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.04em;
  margin-bottom: 12px;
}

.impact-value.positive { color: var(--accent); }
.impact-value.negative { color: var(--accent-2); }
.impact-value.highlight { color: var(--accent-3); }

.impact-label {
  font-size: 1.15rem;
  font-weight: 750;
  margin-bottom: 12px;
  color: var(--text);
  letter-spacing: -0.02em;
}

.impact-card p {
  color: var(--muted);
  line-height: 1.6;
  margin: 0;
}

.case-study {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(280px, 0.75fr);
  gap: 18px;
  align-items: stretch;
}

.study-panel {
  padding: clamp(26px, 4vw, 44px);
  border: 1px solid var(--line);
  border-radius: 22px;
  background: linear-gradient(145deg, var(--surface-strong), var(--surface));
}

.study-steps {
  display: flex;
  flex-direction: column;
  gap: 0;
  padding-top: 10px;
}

.study-steps article {
  position: relative;
  padding: 22px;
  background-color: var(--bg);
  background-image: linear-gradient(var(--surface), var(--surface)); /* Opaque blend */
  box-shadow: 0 -8px 20px rgba(0, 0, 0, 0.03);
  transition: transform 400ms var(--ease), z-index 0ms, box-shadow 400ms var(--ease), border-color 300ms var(--ease);
}

.study-steps article:nth-child(1) { z-index: 3; }
.study-steps article:nth-child(2) { z-index: 2; margin-top: -30px; }
.study-steps article:nth-child(3) { z-index: 1; margin-top: -30px; }

.study-steps article:hover {
  z-index: 10 !important;
  transform: scale(1.06) translateY(-10px) rotate(-1.5deg);
  box-shadow: 0 25px 60px var(--shadow);
  border-color: color-mix(in srgb, var(--accent) 56%, var(--line));
}

.cta {
  display: grid;
  justify-items: center;
  text-align: center;
  margin-bottom: 40px;
  padding-inline: 24px;
  border: 1px solid var(--line);
  border-radius: 26px;
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--accent) 15%, transparent), transparent),
    var(--surface);
}

.cta p {
  max-width: 620px;
}

@keyframes orbit {
  0% {
    transform: rotate(0deg) scale(0.98);
  }
  50% {
    transform: rotate(180deg) scale(1.04);
  }
  100% {
    transform: rotate(360deg) scale(0.98);
  }
}

@keyframes pulse {
  0%,
  100% {
    transform: scale(1);
    opacity: 0.9;
  }
  50% {
    transform: scale(1.35);
    opacity: 0.55;
  }
}

/* Interaction Feedback */
.ripple {
  position: absolute;
  border-radius: 50%;
  transform: scale(0);
  animation: ripple-anim 500ms ease-out;
  background-color: currentColor;
  opacity: 0.15;
  pointer-events: none;
  width: 150px;
  height: 150px;
  margin-left: -75px;
  margin-top: -75px;
  z-index: 0;
}

@keyframes ripple-anim {
  to {
    transform: scale(3);
    opacity: 0;
  }
}

/* Dashboard Additions */
.app-main {
  flex: 1;
  min-width: 0;
  position: relative;
}

.app-sidebar {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  width: clamp(40px, 4vw, 52px);
  flex-shrink: 0;
  padding: 18px 0;
  border-radius: 16px;
  background: color-mix(in srgb, var(--surface-strong) 40%, transparent);
  border: 1px solid color-mix(in srgb, var(--line) 50%, transparent);
}

.sidebar-logo {
  width: 24px;
  height: 24px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 4px 12px var(--glow);
}

.sidebar-menu {
  display: grid;
  gap: 16px;
}

.menu-dot {
  width: 20px;
  height: 20px;
  border-radius: 6px;
  background: color-mix(in srgb, var(--line) 80%, transparent);
  transition: background 300ms var(--ease), transform 300ms var(--ease);
}

.menu-dot:hover {
  background: var(--muted);
}

.menu-dot.active {
  background: var(--text);
  transform: scale(1.1);
}

.sidebar-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--muted);
  border: 2px solid var(--surface);
}

.app-top-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.notification-trigger {
  position: relative;
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--text);
  transition: transform 200ms var(--ease), background 200ms var(--ease);
  cursor: pointer;
}

.notification-trigger:hover {
  transform: scale(1.05);
  background: color-mix(in srgb, var(--surface-strong) 80%, transparent);
}

.notification-badge {
  position: absolute;
  top: -2px;
  right: -2px;
  display: grid;
  place-items: center;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--bg);
  font-size: 0.65rem;
  font-weight: 800;
  box-shadow: 0 2px 8px var(--glow);
}

.notification-toast {
  position: absolute;
  bottom: 0px;
  left: 50%;
  transform: translateX(-50%) translateY(20px) scale(0.95);
  opacity: 0;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: 16px;
  background: color-mix(in srgb, var(--surface-strong) 95%, transparent);
  border: 1px solid var(--line);
  box-shadow: 0 16px 40px var(--shadow);
  backdrop-filter: blur(12px);
  pointer-events: none;
  transition: transform 500ms var(--ease), opacity 500ms var(--ease);
  width: max-content;
  max-width: 90%;
  z-index: 20;
}

.app-frame:hover .notification-toast {
  transform: translateX(-50%) translateY(10px) scale(1);
  opacity: 1;
  transition-delay: 600ms;
}

.toast-icon {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: color-mix(in srgb, var(--accent) 20%, transparent);
  color: var(--accent);
  font-weight: bold;
}

.toast-content strong {
  display: block;
  font-size: 0.85rem;
  margin-bottom: 2px;
  color: var(--text);
}

.toast-content p {
  margin: 0;
  font-size: 0.78rem;
  color: var(--muted);
}

/* Scroll Animations */
.fade-up, .stagger-item {
  opacity: 0;
  will-change: opacity, translate;
}

.fade-up.is-visible, .stagger-group.is-visible > .stagger-item, .stagger-group.is-visible .stagger-item {
  animation: fadeUpIn 800ms var(--ease) forwards;
}

@keyframes fadeUpIn {
  from {
    opacity: 0;
    translate: 0 24px;
  }
  to {
    opacity: 1;
    translate: 0 0;
  }
}

/* Base stagger delays for items inside a stagger-group */
.stagger-group.is-visible > .stagger-item:nth-child(1) { animation-delay: 50ms; }
.stagger-group.is-visible > .stagger-item:nth-child(2) { animation-delay: 150ms; }
.stagger-group.is-visible > .stagger-item:nth-child(3) { animation-delay: 250ms; }
.stagger-group.is-visible > .stagger-item:nth-child(4) { animation-delay: 350ms; }
.stagger-group.is-visible > .stagger-item:nth-child(5) { animation-delay: 450ms; }

/* In case of nested staggers, we just rely on parent class triggers or we can use specific targeting */
.study-steps.is-visible article:nth-child(1) { animation-delay: 100ms; }
.study-steps.is-visible article:nth-child(2) { animation-delay: 200ms; }
.study-steps.is-visible article:nth-child(3) { animation-delay: 300ms; }

/* AI Assistant Panel */
.ai-assistant-panel {
  margin: 20px 0;
  padding: 20px;
  border-radius: 20px;
  background: linear-gradient(145deg, color-mix(in srgb, var(--accent) 12%, transparent), color-mix(in srgb, var(--accent) 4%, transparent));
  border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
  box-shadow: 0 12px 30px color-mix(in srgb, var(--accent) 8%, transparent), inset 0 1px 0 rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(12px);
}

.ai-header {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.72rem;
  font-weight: 800;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}

.ai-sparkle {
  animation: sparkle 3s ease-in-out infinite;
}

@keyframes sparkle {
  0%, 100% { transform: scale(1) rotate(0deg); opacity: 0.8; }
  50% { transform: scale(1.2) rotate(15deg); opacity: 1; }
}

.ai-content {
  min-height: 44px;
  display: flex;
  align-items: center;
}

.ai-thinking {
  display: none;
  align-items: center;
  gap: 4px;
}

.ai-thinking.active {
  display: flex;
}

.ai-thinking span {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  animation: aiPulse 1.4s infinite ease-in-out both;
}

.ai-thinking span:nth-child(1) { animation-delay: -0.32s; }
.ai-thinking span:nth-child(2) { animation-delay: -0.16s; }

@keyframes aiPulse {
  0%, 80%, 100% { transform: scale(0); opacity: 0.3; }
  40% { transform: scale(1); opacity: 1; }
}

.ai-typing-text {
  font-size: 0.88rem;
  line-height: 1.5;
  color: var(--text);
  margin: 0;
}

.ai-typing-text::after {
  content: '|';
  animation: cursorBlink 1s infinite step-start;
  color: var(--accent);
  margin-left: 2px;
}

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

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

@media (max-width: 900px) {
  .site-shell {
    width: min(100% - 28px, 720px);
  }

  .topbar {
    align-items: center;
    border-radius: 999px;
  }

  .topbar nav {
    display: none;
  }

  .section-grid,
  .mood-section,
  .case-study {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .hero {
    min-height: auto;
    padding-top: 70px;
  }

  .app-frame {
    margin: 0 auto;
  }

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

  .mood-section {
    align-items: start;
  }
}

@media (max-width: 560px) {
  .site-shell {
    width: min(100% - 20px, 420px);
  }

  .topbar {
    top: 10px;
    padding: 10px 12px;
  }

  .brand span:last-child {
    display: none;
  }

  .topbar-action {
    padding-inline: 13px;
  }

  .hero {
    padding-top: 56px;
  }

  h1 {
    font-size: clamp(2.5rem, 15vw, 3.5rem);
  }

  .feature-grid,
  .impact-grid {
    grid-template-columns: 1fr;
  }

  .insight-panel,
  .mini-dashboard {
    grid-template-columns: 1fr;
  }

  .emotion-ring {
    width: 80px;
    height: 80px;
  }
  
  .emotion-ring span {
    font-size: 1.6rem;
  }

  .mood-toggle {
    width: 100%;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    border-radius: 999px;
  }

  .mood-button {
    min-width: 0;
    padding-inline: 8px;
  }

  .app-top {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .app-top-actions {
    width: 100%;
    justify-content: space-between;
  }
  
  .app-sidebar {
    width: 44px;
    padding: 14px 0;
  }

  .features,
  .mood-section,
  .case-study,
  .cta,
  .impact-section {
    padding: 56px 0;
  }

  .impact-card {
    padding: 28px 24px;
  }
}

/* Scroll Progress Bar */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  width: 0%;
  z-index: 9999;
  transition: width 100ms ease-out;
}

/* Skeleton Loading */
.is-loading .skeleton {
  color: transparent !important;
  background: linear-gradient(90deg, color-mix(in srgb, var(--surface) 40%, transparent) 25%, color-mix(in srgb, var(--surface-strong) 60%, transparent) 50%, color-mix(in srgb, var(--surface) 40%, transparent) 75%);
  background-size: 200% 100%;
  animation: skeletonLoad 1.5s infinite;
  border-radius: 6px;
  display: inline-block;
}

.is-loading .skeleton * {
  visibility: hidden;
}

@keyframes skeletonLoad {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* Custom Cursor */
@media (pointer: fine) {
  body, button, a, .mood-button, .topbar nav a, .primary-action, .secondary-action, .feature-card {
    cursor: none;
  }

  .cursor-dot, .cursor-ring {
    position: fixed;
    top: 0;
    left: 0;
    pointer-events: none;
    z-index: 9999;
    will-change: transform;
  }

  .cursor-dot {
    width: 8px;
    height: 8px;
    margin: -4px 0 0 -4px;
    border-radius: 50%;
    background-color: var(--accent);
    transition: background-color 300ms var(--ease);
  }

  .cursor-ring-inner {
    width: 36px;
    height: 36px;
    margin: -18px 0 0 -18px;
    border-radius: 50%;
    border: 1px solid var(--accent-2);
    transition: transform 300ms var(--ease), background-color 300ms var(--ease), border-color 300ms var(--ease);
  }

  .cursor-ring.is-hovering .cursor-ring-inner {
    transform: scale(1.5);
    background-color: color-mix(in srgb, var(--accent) 15%, transparent);
    border-color: var(--accent);
  }
}

@media (pointer: coarse) {
  .cursor-dot, .cursor-ring {
    display: none !important;
  }
}