/* =========================================================================
   WE ARE NERDS — main.css
   Pure Modern CSS · mobile-first · Design Tokens · Flex/Grid
   ========================================================================= */

/* ------------------------------------------------------------------------- *
 * 1. Tokens
 * ------------------------------------------------------------------------- */
:root {
  /* Color */
  --color-bg-light: #ffffff;
  --color-bg-dark: #1f1f1f;
  --color-text-on-light: #1f1f1f;
  --color-text-on-dark: #ffffff;
  --color-muted-on-dark: rgba(255, 255, 255, 0.5);
  --color-selection-bg: #9aa4a3;
  --color-selection-fg: #f5f5f5;

  /* Type */
  --font-sans: Arial, Helvetica, sans-serif;
  --font-display: "MisoRegular", var(--font-sans);

  --fs-body: clamp(0.95rem, 0.9rem + 0.2vw, 1rem);          /* 15–16px */
  --fs-h1-hero: clamp(3rem, 6vw + 1rem, 5.5rem);            /* 48–88px */
  --fs-h1-section: clamp(1.75rem, 1.2rem + 2vw, 2.75rem);   /* 28–44px */
  --lh-body: 1.6;
  --lh-tight: 1.1;

  /* Spacing scale (rem-based, fluid section padding) */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;
  --space-9: 6rem;

  --section-y: clamp(3rem, 8vw, 6rem);    /* vertical section padding */
  --gutter:    clamp(1rem, 4vw, 2rem);    /* horizontal page gutter */

  /* Layout */
  --container-max: 64rem;        /* ~1024px content max */
  --container-narrow: 36rem;     /* ~576px for prose */
  --radius-pill: 999px;

  /* Motion */
  --transition-fast: 200ms ease;
  --transition-reveal: 800ms ease-out;
}

/* ------------------------------------------------------------------------- *
 * 2. Reset / base
 * ------------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  background: var(--color-bg-light);
  color: var(--color-text-on-light);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, picture, svg {
  display: block;
  max-inline-size: 100%;
  block-size: auto;
}

h1, h2, h3, p { margin: 0; }

a {
  color: inherit;
  text-decoration: none;
  transition: opacity var(--transition-fast);
}
a:hover, a:focus-visible { opacity: 0.6; }
a:focus-visible {
  outline: 2px solid currentColor;
  outline-offset: 4px;
  opacity: 1;
}

::selection {
  background: var(--color-selection-bg);
  color: var(--color-selection-fg);
  text-shadow: none;
}

/* ------------------------------------------------------------------------- *
 * 3. Layout primitives
 * ------------------------------------------------------------------------- */
.container {
  inline-size: 100%;
  max-inline-size: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section {
  padding-block: var(--section-y);
}

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

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

/* ------------------------------------------------------------------------- *
 * 4. Typography
 * ------------------------------------------------------------------------- */
.h-display {
  font-family: var(--font-display);
  font-weight: 400;
  letter-spacing: 0.04em;
  line-height: var(--lh-tight);
}

.h-section {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: var(--fs-h1-section);
  line-height: var(--lh-tight);
  letter-spacing: 0.04em;
  margin-block-end: var(--space-5);
}

.prose {
  max-inline-size: 38rem;       /* readable measure */
  margin-inline: auto;
}

/* ------------------------------------------------------------------------- *
 * 5. Components
 * ------------------------------------------------------------------------- */

/* Buttons / CTAs */
.cta {
  display: inline-block;
  padding: 0.875rem 2rem;
  border-radius: var(--radius-pill);
  font-family: var(--font-display);
  font-size: 1.25rem;
  letter-spacing: 0.04em;
  margin-block-start: var(--space-6);
  white-space: nowrap;
}
.cta--invert-dark {
  background: var(--color-bg-dark);
  color: var(--color-text-on-dark);
}
.cta--invert-light {
  background: var(--color-bg-light);
  color: var(--color-text-on-light);
}

/* Hero */
.hero {
  background: var(--color-bg-dark);
  color: var(--color-text-on-dark);
  text-align: center;
  padding-block: clamp(5rem, 18vw, 11rem);
}
.hero__logo {
  inline-size: clamp(72px, 10vw, 96px);
  margin-inline: auto;
  margin-block-end: var(--space-6);
}
.hero__title {
  font-family: var(--font-display);
  font-size: var(--fs-h1-hero);
  line-height: var(--lh-tight);
  letter-spacing: 0.04em;
  margin: 0;
}

/* Section: about */
.about__grid {
  display: grid;
  gap: var(--space-7);
  align-items: center;
  grid-template-columns: 1fr;
}
@media (min-width: 48rem) {
  .about__grid {
    grid-template-columns: 1fr 1fr;
  }
}
.about__icon {
  inline-size: clamp(160px, 26vw, 260px);
  margin-inline: auto;
}

/* Section: service */
.service__icons {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-6);
  justify-items: center;
  align-items: center;
  margin-block: var(--space-7);
}
.service__icons img {
  inline-size: clamp(140px, 22vw, 220px);
}
@media (min-width: 48rem) {
  .service__icons {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}
.service__keywords {
  max-inline-size: 38rem;
  margin-inline: auto;
}

/* Section: work (alternating image/text) */
.work__grid {
  display: grid;
  gap: var(--space-7);
  align-items: center;
  grid-template-columns: 1fr;
}
@media (min-width: 48rem) {
  .work__grid {
    grid-template-columns: 1fr 1fr;
  }
  /* alternate image/text on wide */
  .work--reverse .work__grid > .work__media {
    order: -1;
  }
}
.work__media img {
  margin-inline: auto;
  inline-size: clamp(220px, 36vw, 360px);
}

/* Section: contact */
.contact__links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-7);
  margin-block-start: var(--space-7);
}
.contact__links img {
  inline-size: clamp(120px, 24vw, 200px);
}

/* Footer */
.site-footer {
  background: var(--color-bg-dark);
  color: var(--color-muted-on-dark);
  text-align: center;
  padding-block: var(--space-8);
}
.site-footer__logo {
  inline-size: 64px;
  margin-inline: auto;
  margin-block-end: var(--space-5);
  opacity: 0.7;
}
.site-footer__legal {
  font-size: 0.75rem;
  line-height: 1.6;
  max-inline-size: 38rem;
  margin-inline: auto;
}
.site-footer a { text-decoration: underline; text-underline-offset: 0.15em; }

/* ------------------------------------------------------------------------- *
 * 6. Reveal-on-scroll (replaces former jQuery animation)
 * ------------------------------------------------------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--transition-reveal), transform var(--transition-reveal);
}
.reveal.is-visible {
  opacity: 1;
  transform: none;
}
.reveal--instant { transition-delay: 0ms; }
.reveal--delayed-1 { transition-delay: 200ms; }
.reveal--delayed-2 { transition-delay: 400ms; }
.reveal--delayed-3 { transition-delay: 600ms; }

@media (prefers-reduced-motion: reduce) {
  .reveal,
  .reveal.is-visible {
    transition: none !important;
    transform: none !important;
    opacity: 1 !important;
  }
}

/* ------------------------------------------------------------------------- *
 * 7. Print
 * ------------------------------------------------------------------------- */
@media print {
  .hero, .section--dark, .site-footer { background: #fff !important; color: #000 !important; }
  .cta { border: 1px solid #000; }
  .reveal { opacity: 1 !important; transform: none !important; }
}