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

/* ── Design Tokens ── */
:root {
  --color-bg-primary: #faf8f4;
  --color-bg-secondary: #f2ede6;
  --color-bg-tertiary: #e7e0d6;
  --color-text-primary: #2c2520;
  --color-text-secondary: #7a7067;
  --color-text-tertiary: #b0a89e;
  --color-border: #d6cfc5;
  --color-border-light: #e7e0d6;
  --color-accent: #2e5c8a;
  --color-accent-hover: #3a6d9e;
  --color-accent-text: #faf8f4;
  --color-success: #5a8a5c;
  --color-shadow: rgba(60, 45, 30, 0.08);

  --font-body: "Charter", "Bitstream Charter", "Sitka Text", Cambria, serif;
  --font-mono: "SF Mono", "Fira Code", "Fira Mono", Menlo, Consolas, monospace;

  --max-width: 1080px;
  --nav-height: 56px;
  --radius: 12px;
  --radius-sm: 8px;

  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg-primary: #1f1c18;
    --color-bg-secondary: #2a2621;
    --color-bg-tertiary: #36312a;
    --color-text-primary: #e8e0d6;
    --color-text-secondary: #9a9088;
    --color-text-tertiary: #6a6058;
    --color-border: #3a3530;
    --color-border-light: #2e2a24;
    --color-accent: #6a9ec4;
    --color-accent-hover: #82b2d4;
    --color-shadow: rgba(0, 0, 0, 0.25);
  }
}

/* ── Base ── */
html {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  overflow-x: hidden;
  position: relative;
}

/* ── Paper texture overlay ── */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.3;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='300'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
}

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

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

/* ── Utility ── */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 32px;
}

.section {
  padding: 96px 0;
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  max-width: 600px;
}

/* ── Reveal Animation ── */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Nav ── */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(250, 248, 244, 0.72);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border-light);
  transition: background 0.2s;
}

@media (prefers-color-scheme: dark) {
  .nav {
    background: rgba(31, 28, 24, 0.72);
  }
}

.nav.scrolled {
  background: rgba(250, 248, 244, 0.88);
  box-shadow: 0 1px 3px var(--color-shadow);
}

@media (prefers-color-scheme: dark) {
  .nav.scrolled {
    background: rgba(31, 28, 24, 0.88);
  }
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--max-width);
  padding: 0 32px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.nav-brand img {
  width: 28px;
  height: 28px;
  border-radius: 6px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  transition: color 0.15s;
}

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

.nav-hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  color: var(--color-text-primary);
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 500;
  padding: 12px 24px;
  border-radius: 980px;
  border: none;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, box-shadow 0.15s;
  text-decoration: none;
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-accent-text);
}

.btn-primary:hover {
  background: var(--color-accent-hover);
}

.btn-ghost {
  background: transparent;
  color: var(--color-accent);
  border: 1px solid var(--color-border);
}

.btn-ghost:hover {
  background: var(--color-bg-secondary);
}

.btn-sm {
  font-size: 0.8125rem;
  padding: 8px 18px;
}

/* ── Hero ── */
.hero {
  padding: 120px 0 96px;
  text-align: center;
  position: relative;
  overflow: hidden;
  isolation: isolate;
}

.hero > .container {
  position: relative;
  z-index: 1;
}

.hero-shader {
  position: absolute;
  inset: -10% -5%;
  z-index: 0;
  pointer-events: none;
  opacity: 0.55;
  filter: blur(6px);
  mask-image: radial-gradient(
    ellipse at center,
    rgba(0, 0, 0, 1) 30%,
    rgba(0, 0, 0, 0.4) 70%,
    rgba(0, 0, 0, 0) 100%
  );
  -webkit-mask-image: radial-gradient(
    ellipse at center,
    rgba(0, 0, 0, 1) 30%,
    rgba(0, 0, 0, 0.4) 70%,
    rgba(0, 0, 0, 0) 100%
  );
}

.hero-shader > canvas {
  width: 100% !important;
  height: 100% !important;
  display: block;
}

@media (prefers-color-scheme: dark) {
  .hero-shader {
    opacity: 0.7;
  }
}

@media (prefers-reduced-motion: reduce) {
  .hero-shader {
    display: none;
  }
}

.hero-headline {
  font-size: 3.25rem;
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.1;
  margin-bottom: 20px;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}

.hero-subheadline {
  font-size: 1.25rem;
  line-height: 1.5;
  color: var(--color-text-secondary);
  max-width: 580px;
  margin: 0 auto 36px;
}

.hero-buttons {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 64px;
}

/* ── App Mockup ── */
.mockup {
  max-width: 480px;
  margin: 0 auto;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  background: var(--color-bg-primary);
  box-shadow: 0 20px 60px var(--color-shadow), 0 1px 3px var(--color-shadow);
  overflow: hidden;
}

.mockup-titlebar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 12px 14px;
  background: var(--color-bg-secondary);
  border-bottom: 1px solid var(--color-border-light);
}

.mockup-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.mockup-dot:nth-child(1) { background: #ff5f57; }
.mockup-dot:nth-child(2) { background: #febc2e; }
.mockup-dot:nth-child(3) { background: #28c840; }

.mockup-titlebar-text {
  flex: 1;
  text-align: center;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  margin-right: 38px;
}

.mockup-body {
  display: flex;
  flex-direction: column;
  min-height: 340px;
}

.mockup-tasks {
  flex: 1;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.mockup-day {
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  padding: 6px 8px;
  background: var(--color-bg-secondary);
  border-radius: var(--radius-sm);
}

.mockup-day.today {
  color: var(--color-accent);
  font-weight: 700;
}

.mockup-task {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  font-size: 0.75rem;
  color: var(--color-text-primary);
  border-radius: var(--radius-sm);
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border-light);
}

.mockup-checkbox {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 1.5px solid var(--color-border);
  flex-shrink: 0;
}

.mockup-checkbox.checked {
  background: var(--color-accent);
  border-color: var(--color-accent);
}

.mockup-task.done {
  color: var(--color-text-tertiary);
  text-decoration: line-through;
}

.mockup-chat {
  border-top: 1px solid var(--color-border-light);
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.mockup-bubble {
  font-size: 0.6875rem;
  padding: 6px 10px;
  border-radius: 10px;
  max-width: 75%;
  line-height: 1.4;
}

.mockup-bubble.user {
  align-self: flex-end;
  background: var(--color-accent);
  color: #fff;
}

.mockup-bubble.assistant {
  align-self: flex-start;
  background: var(--color-bg-secondary);
  color: var(--color-text-primary);
}

.mockup-input {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border-radius: 8px;
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border-light);
  margin-top: 2px;
}

.mockup-input-text {
  font-size: 0.6875rem;
  color: var(--color-text-tertiary);
}

.mockup-input-btn {
  margin-left: auto;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
}

.mockup-input-btn svg {
  width: 10px;
  height: 10px;
  fill: #fff;
}

/* ── Features ── */
.features {
  background: var(--color-bg-secondary);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 48px;
}

.feature-card {
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.feature-card:hover {
  border-color: var(--color-border);
  box-shadow: 0 4px 12px var(--color-shadow);
}

.feature-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--color-bg-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  color: var(--color-accent);
}

.feature-icon svg {
  width: 20px;
  height: 20px;
}

.feature-card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 0.9375rem;
  line-height: 1.5;
  color: var(--color-text-secondary);
}

/* ── How It Works ── */
.showcase {
  display: flex;
  flex-direction: column;
  gap: 72px;
  margin-top: 56px;
}

.showcase-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 48px;
}

.showcase-row.reverse .showcase-text {
  order: 2;
}

.showcase-eyebrow {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 12px;
}

.showcase-text h3 {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.showcase-text p {
  font-size: 1.0625rem;
  line-height: 1.55;
  color: var(--color-text-secondary);
}

.showcase-text code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  padding: 1px 6px;
  border-radius: 5px;
  background: var(--color-bg-tertiary);
  color: var(--color-text-primary);
}

/* ── Showcase visuals ── */
.ex {
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  background: var(--color-bg-primary);
  box-shadow: 0 16px 40px var(--color-shadow), 0 1px 3px var(--color-shadow);
  padding: 14px;
  overflow: hidden;
}

/* Week view */
.ex-week {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.ex-week-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 9px 12px;
  font-size: 0.8125rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  background: var(--color-bg-secondary);
  color: var(--color-text-secondary);
}

.ex-week-row.muted {
  opacity: 0.5;
}

.ex-week-empty {
  font-size: 0.6875rem;
  font-weight: 500;
  color: var(--color-text-tertiary);
}

/* Heat-map task indicator — mirrors the app's week-view meter: a row of bars
   that grows and shifts green -> amber -> red as a day's task load increases. */
.task-meter {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  height: 13px;
}
.task-meter-bar {
  width: 3px;
  height: 13px;
  border-radius: 1px;
  background: #3fb950;
}
.task-meter-bar:nth-child(-n + 3) {
  background: #3fb950;
}
.task-meter-bar:nth-child(n + 4):nth-child(-n + 6) {
  background: #d29922;
}
.task-meter-bar:nth-child(n + 7) {
  background: #f85149;
}

.ex-week-row.active {
  display: block;
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border);
  padding: 0;
}

.ex-week-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  border-bottom: 1px solid var(--color-border-light);
  color: var(--color-accent);
  font-weight: 700;
}


.ex-week-tasks {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 10px 12px;
}

.ex-task {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 0.8125rem;
  font-weight: 400;
  color: var(--color-text-primary);
}

.ex-task.done span {
  color: var(--color-text-tertiary);
  text-decoration: line-through;
}

.ex-dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 1.5px solid var(--color-border);
  flex-shrink: 0;
}

.ex-dot.checked {
  background: var(--color-accent);
  border-color: var(--color-accent);
}

/* @ mentions */
.ex-mention {
  position: relative;
}

.ex-input {
  display: flex;
  align-items: center;
  padding: 12px 14px;
  font-size: 0.875rem;
  color: var(--color-text-primary);
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-sm);
}

.ex-token {
  color: var(--color-accent);
  font-weight: 700;
  margin-left: 4px;
}

.ex-caret {
  width: 1.5px;
  height: 1.05em;
  background: var(--color-accent);
  margin-left: 1px;
  animation: ex-blink 1.1s step-end infinite;
}

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

@media (prefers-reduced-motion: reduce) {
  .ex-caret { animation: none; }
}

.ex-menu {
  margin-top: 8px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg-primary);
  box-shadow: 0 8px 24px var(--color-shadow);
  overflow: hidden;
}

.ex-menu-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  font-size: 0.8125rem;
  font-family: var(--font-mono);
  color: var(--color-text-primary);
}

.ex-menu-item.active {
  background: var(--color-bg-secondary);
}

.ex-menu-ico {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  color: var(--color-accent);
}

.ex-menu-name::before {
  content: "@";
  color: var(--color-accent);
}

.ex-menu-kind {
  margin-left: auto;
  font-family: var(--font-body);
  font-size: 0.6875rem;
  color: var(--color-text-tertiary);
  padding: 2px 7px;
  border-radius: 980px;
  background: var(--color-bg-tertiary);
}

/* Agent setup */
.ex-setup {
  padding: 0;
}

.ex-term-bar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 12px 14px;
  background: var(--color-bg-secondary);
  border-bottom: 1px solid var(--color-border-light);
}

.ex-term {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.9;
  padding: 16px 18px;
}

.ex-term-line {
  color: var(--color-text-primary);
  white-space: nowrap;
}

.ex-prompt {
  color: var(--color-accent);
  font-weight: 700;
  margin-right: 8px;
}

.ex-muted {
  color: var(--color-text-tertiary);
}

.ex-ok {
  color: var(--color-success);
  font-weight: 600;
}

/* ── CTA ── */
.cta {
  text-align: center;
  background: var(--color-bg-secondary);
}

.cta-headline {
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 12px;
}

.cta-sub {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  margin-bottom: 32px;
}

.cta-platforms {
  margin-top: 16px;
  font-size: 0.8125rem;
  color: var(--color-text-tertiary);
}

/* ── Footer ── */
.footer {
  padding: 32px 0;
  border-top: 1px solid var(--color-border-light);
}

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

.footer-brand {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

.footer-links {
  display: flex;
  gap: 24px;
  list-style: none;
}

.footer-links a {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  transition: color 0.15s;
}

.footer-links a:hover {
  color: var(--color-text-primary);
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .container {
    padding: 0 24px;
  }

  .section {
    padding: 64px 0;
  }

  .hero {
    padding: 80px 0 64px;
  }

  .hero-headline {
    font-size: 2.25rem;
  }

  .hero-subheadline {
    font-size: 1.0625rem;
  }

  .features-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .showcase {
    gap: 48px;
  }

  .showcase-row,
  .showcase-row.reverse {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .showcase-row.reverse .showcase-text {
    order: 0;
  }

  .cta-headline {
    font-size: 2rem;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 20px;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--color-bg-primary);
    border-bottom: 1px solid var(--color-border-light);
    padding: 16px 20px;
    gap: 16px;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-hamburger {
    display: block;
  }

  .hero {
    padding: 64px 0 48px;
  }

  .hero-headline {
    font-size: 1.875rem;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
    margin-bottom: 48px;
  }

  .mockup {
    max-width: 100%;
  }

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

  .section-title {
    font-size: 1.5rem;
  }

  .footer-inner {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }
}