@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
  /* Tactile soft-modern palette derived from reference visual */
  --color-canvas: #F8F8F7;
  --color-canvas-soft: #F1F1EF;
  --color-surface: #FFFFFF;
  --color-surface-hover: #FCFCFC;
  --color-ink: #101012;
  --color-ink-soft: #242428;
  --color-slate: #5E5E66;
  --color-muted: #8E8E98;
  --color-border-subtle: rgba(16, 16, 18, 0.06);
  --color-border-card: rgba(16, 16, 18, 0.08);
  --color-border-hover: rgba(16, 16, 18, 0.16);

  /* Functional accent tokens */
  --color-green-dot: #22C55E;
  --color-green-glow: rgba(34, 197, 94, 0.28);
  --color-star-gold: #F59E0B;
  --color-accent-arrow: #EF4444;

  /* Dark bookend surfaces (CTA & footer) */
  --color-dark-surface: #111113;
  --color-dark-border: #232328;
  --color-dark-text: #FFFFFF;
  --color-dark-muted: #9C9CA6;

  /* Typography tokens: Plus Jakarta Sans + JetBrains Mono */
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;

  /* Fluid typography scale */
  --text-xs: clamp(0.75rem, 0.72rem + 0.15vw, 0.8125rem);
  --text-sm: clamp(0.875rem, 0.84rem + 0.2vw, 0.9375rem);
  --text-base: clamp(0.96875rem, 0.93rem + 0.25vw, 1.0625rem);
  --text-lg: clamp(1.0625rem, 1.02rem + 0.35vw, 1.25rem);
  --text-xl: clamp(1.25rem, 1.18rem + 0.5vw, 1.5rem);
  --text-2xl: clamp(1.625rem, 1.45rem + 0.9vw, 2.125rem);
  --text-3xl: clamp(2.125rem, 1.85rem + 1.5vw, 3rem);
  --text-4xl: clamp(2.15rem, 1.75rem + 1.5vw, 3rem);
  --text-hero: clamp(1.85rem, 1.45rem + 1.4vw, 2.75rem);

  /* Refined balanced spacing scale */
  --space-xs: 0.5rem;
  --space-sm: 0.875rem;
  --space-md: 1.25rem;
  --space-lg: 1.75rem;
  --space-xl: 2.75rem;
  --space-2xl: 4.25rem;
  --space-3xl: 5.75rem;

  /* Layout container */
  --container-max: 1220px;
  --container-narrow: 820px;
  --gutter: clamp(1rem, 0.8rem + 1.5vw, 2rem);
  --header-h: 68px;

  /* Soft tactile border-radius lock */
  --radius-xs: 6px;
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --radius-pill: 9999px;

  /* Tactile shadow tokens */
  --shadow-tactile-btn: 0 14px 28px -6px rgba(17, 17, 19, 0.42), 0 4px 10px rgba(17, 17, 19, 0.12);
  --shadow-card-soft: 0 16px 40px -12px rgba(16, 16, 18, 0.07), 0 2px 8px rgba(16, 16, 18, 0.02);
  --shadow-card-hover: 0 22px 50px -14px rgba(16, 16, 18, 0.12), 0 4px 14px rgba(16, 16, 18, 0.03);
  --shadow-activity-stack: 0 20px 48px -10px rgba(16, 16, 18, 0.09), 0 4px 14px rgba(16, 16, 18, 0.03);
  --shadow-modal: 0 32px 80px -16px rgba(16, 16, 18, 0.24);

  /* Motion tokens */
  --ease-soft: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration-fast: 180ms;
  --duration-normal: 320ms;
  --duration-slow: 550ms;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 1.25rem);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-ink);
  background-color: var(--color-canvas);
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-sans);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.03em;
  color: var(--color-ink);
}

p {
  color: var(--color-slate);
}

a {
  color: inherit;
  text-decoration: none;
  transition: all var(--duration-fast) var(--ease-soft);
}

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

button, input, textarea, select {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
}

button {
  cursor: pointer;
}

ul, ol {
  list-style: none;
}

:focus-visible {
  outline: 2px solid var(--color-ink);
  outline-offset: 3px;
}

::selection {
  background-color: var(--color-ink);
  color: var(--color-surface);
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

.container-narrow {
  width: 100%;
  max-width: var(--container-narrow);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

/* Subtle section headers */
.section-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-slate);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border-card);
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-pill);
  margin-bottom: var(--space-sm);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
}

.section-title {
  font-size: var(--text-3xl);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.15;
  color: var(--color-ink);
}

.section-subtitle {
  font-size: var(--text-base);
  color: var(--color-slate);
  max-width: 620px;
  margin-top: 0.75rem;
  line-height: 1.6;
}