/* ============================================
   ALFRED LAW — DESIGN SYSTEM
   Black & White Editorial
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,600;0,700;1,400&family=DM+Sans:wght@300;400;500&display=swap');

/* ── Tokens ── */
:root {
  --color-bg:           #FFFFFF;
  --color-surface:      #F7F7F7;
  --color-ink:          #0A0A0A;
  --color-ink-2:        #444444;
  --color-ink-3:        #888888;
  --color-border:       #E2E2E2;
  --color-accent:       #0A0A0A;
  --color-mint:         #B3EFC3;

  --font-display:       'Playfair Display', Georgia, serif;
  --font-body:          'DM Sans', system-ui, sans-serif;

  --size-xs:  0.75rem;   /* 12px */
  --size-sm:  0.875rem;  /* 14px */
  --size-base:1rem;      /* 16px */
  --size-md:  1.125rem;  /* 18px */
  --size-lg:  1.5rem;    /* 24px */
  --size-xl:  2rem;      /* 32px */
  --size-2xl: 3rem;      /* 48px */
  --size-3xl: 4.5rem;    /* 72px */

  --space-1:  0.5rem;
  --space-2:  1rem;
  --space-3:  1.5rem;
  --space-4:  2rem;
  --space-6:  3rem;
  --space-8:  4rem;
  --space-12: 6rem;
  --space-16: 8rem;

  --radius-sm: 4px;
  --radius-md: 8px;

  --transition: 200ms ease;
  --max-width: 1160px;
}

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

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

/* ── Typography ── */
h1, h2, h3 {
  font-family: var(--font-display);
  line-height: 1.15;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.5rem, 6vw, var(--size-3xl)); font-weight: 700; }
h2 { font-size: clamp(1.75rem, 4vw, var(--size-2xl)); font-weight: 600; }
h3 { font-size: clamp(1.25rem, 2.5vw, var(--size-xl)); font-weight: 600; }

p {
  font-size: var(--size-md);
  color: var(--color-ink-2);
  line-height: 1.75;
  max-width: 65ch;
}

.label {
  font-family: var(--font-body);
  font-size: var(--size-xs);
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-ink-3);
}

/* ── Layout ── */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

@media (max-width: 768px) {
  .container { padding: 0 var(--space-2); }
}

/* ── Nav ── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  height: 64px;
  display: flex;
  align-items: center;
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.nav__logo img {
  height: 32px;
  width: auto;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.nav__links a {
  font-size: var(--size-sm);
  font-weight: 500;
  color: var(--color-ink-2);
  transition: color var(--transition);
}

.nav__links a:hover { color: var(--color-ink); }

.nav__links a.active {
  color: var(--color-ink);
  border-bottom: 1px solid var(--color-ink);
  padding-bottom: 2px;
}

.nav__cta {
  font-size: var(--size-sm);
  font-weight: 500;
  padding: var(--space-1) var(--space-3);
  border: 1px solid var(--color-ink);
  border-radius: var(--radius-sm);
  transition: background var(--transition), color var(--transition);
}

.nav__cta:hover {
  background: var(--color-ink);
  color: var(--color-bg);
}

/* Mobile nav */
.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: var(--space-1);
}

.nav__hamburger span {
  display: block;
  width: 24px;
  height: 1.5px;
  background: var(--color-ink);
  transition: transform var(--transition), opacity var(--transition);
}

@media (max-width: 768px) {
  .nav__hamburger { display: flex; }

  .nav__links {
    display: none;
    position: fixed;
    top: 64px;
    left: 0;
    width: 100vw;
    height: calc(100vh - 64px);
    background: #FFFFFF;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: var(--space-4);
    font-size: var(--size-lg);
    z-index: 99;
  }

  .nav__links.open { display: flex; }
  .nav__cta { display: none; }
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-family: var(--font-body);
  font-size: var(--size-sm);
  font-weight: 500;
  padding: 0.75rem var(--space-3);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  cursor: pointer;
  border: none;
}

.btn--primary {
  background: var(--color-ink);
  color: var(--color-bg);
}

.btn--primary:hover {
  background: #333;
}

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

.btn--outline:hover {
  background: var(--color-ink);
  color: var(--color-bg);
}

.btn--link {
  background: transparent;
  color: var(--color-ink-2);
  border: none;
  padding-left: 0;
  padding-right: 0;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.btn--link:hover {
  color: var(--color-ink);
}

/* ── Work Grid ── */
.work-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
}

@media (max-width: 768px) {
  .work-grid { grid-template-columns: 1fr; }
}

.work-card {
  display: block;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
  background: var(--color-bg);
}

.work-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.08);
}

.work-card__thumb {
  aspect-ratio: 16/9;
  background: var(--color-surface);
  overflow: hidden;
}

.work-card__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 400ms ease;
}

.work-card:hover .work-card__thumb img {
  transform: scale(1.03);
}

.work-card__body {
  padding: var(--space-3);
}

.work-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  margin-bottom: var(--space-2);
}

.tag {
  font-size: var(--size-xs);
  font-weight: 500;
  padding: 3px 10px;
  border: 1px solid var(--color-border);
  border-radius: 100px;
  color: var(--color-ink-2);
}

.work-card__title {
  font-family: var(--font-display);
  font-size: var(--size-lg);
  margin-bottom: var(--space-1);
}

.work-card__desc {
  font-size: var(--size-sm);
  color: var(--color-ink-3);
  line-height: 1.6;
  max-width: none;
}

/* ── Case Study ── */
.case-hero {
  padding: calc(64px + var(--space-12)) 0 var(--space-8);
  border-bottom: 1px solid var(--color-border);
}

.case-meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: var(--space-3);
  padding: var(--space-6) 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  margin: var(--space-6) 0;
}

.case-meta__item {}
.case-meta__label {
  font-size: var(--size-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-ink-3);
  margin-bottom: var(--space-1);
}
.case-meta__value {
  font-size: var(--size-sm);
  font-weight: 500;
}

.case-section {
  padding: var(--space-12) 0;
  border-bottom: 1px solid var(--color-border);
}

.case-section:last-child { border-bottom: none; }

.case-section__eyebrow {
  font-size: var(--size-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-ink-3);
  margin-bottom: var(--space-2);
}

.case-section h2 { margin-bottom: var(--space-3); }
.case-section p  { margin-bottom: var(--space-3); }

.case-image {
  width: 100%;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  margin: var(--space-4) 0;
}

.ai-note {
  background: var(--color-mint);
  border-left: 2px solid var(--color-ink);
  padding: var(--space-3) var(--space-4);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: var(--space-4) 0;
}

.ai-note p {
  font-size: var(--size-sm);
  color: var(--color-ink-2);
  margin: 0;
}

/* ── Footer ── */
.footer {
  padding: var(--space-8) 0;
  border-top: 1px solid var(--color-border);
}

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

.footer__copy {
  font-size: var(--size-sm);
  color: var(--color-ink-3);
}

.footer__links {
  display: flex;
  gap: var(--space-3);
}

.footer__links a {
  font-size: var(--size-sm);
  color: var(--color-ink-3);
  transition: color var(--transition);
}

.footer__links a:hover { color: var(--color-ink); }

@media (max-width: 768px) {
  .footer__inner { flex-direction: column; gap: var(--space-2); text-align: center; }
}

/* ── Utilities ── */
.pt-nav { padding-top: calc(64px + var(--space-12)); }
.section { padding: var(--space-12) 0; }
.section--lg { padding: var(--space-16) 0; }
.text-center { text-align: center; }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }

/* ── Hero Actions ── */
.hero__actions {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

/* ── Animations ── */
@media (prefers-reduced-motion: no-preference) {
  .fade-up {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 600ms ease, transform 600ms ease;
  }
  .fade-up.visible {
    opacity: 1;
    transform: translateY(0);
  }
}