/* Magazine — Variation 08 */

:root {
  /* Typography scale */
  --font-display: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --font-body: 'Source Serif 4', Georgia, 'Times New Roman', serif;
  --font-sans: 'Inter', system-ui, sans-serif;

  --step--1: 0.694rem;
  --step-0: 0.8rem;
  --step-1: 0.944rem;
  --step-2: 1.125rem;
  --step-3: 1.333rem;
  --step-4: 1.777rem;
  --step-5: 2.369rem;
  --step-6: 3.157rem;
  --step-7: 4.209rem;

  /* Color tokens */
  --ink: #14120e;
  --ink-soft: rgba(20, 18, 14, 0.72);
  --ink-faint: rgba(20, 18, 14, 0.4);
  --ink-fainter: rgba(20, 18, 14, 0.12);
  --paper: #f6f2ea;
  --paper-warm: #ece4d8;
  --paper-cool: #eae4db;
  --accent: #b84a32;
  --accent-ink: #8c3623;
  --rule: rgba(20, 18, 14, 0.12);
  --rule-strong: rgba(20, 18, 14, 0.28);
  --proof-real: #1b6b42;
  --proof-concept: #2b4f8a;
  --proof-demo: #8a6d1b;
  --proof-real-bg: rgba(27, 107, 66, 0.08);
  --proof-concept-bg: rgba(43, 79, 138, 0.08);
  --proof-demo-bg: rgba(138, 109, 27, 0.08);

  /* Motion */
  --ease-out: cubic-bezier(0.22, 0.61, 0.36, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --duration-fast: 180ms;
  --duration-base: 280ms;
  --duration-slow: 560ms;
  --duration-reveal: 840ms;

  /* Spacing tokens */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Layout */
  --measure: 68ch;
  --measure-wide: 84ch;
  --measure-narrow: 38ch;
  --bleed: clamp(var(--space-6), 4vw, var(--space-12));
  --page-width: 1240px;
  --col-gap: var(--space-8);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

html.reduced-motion,
html.reduced-motion * {
  animation-duration: 0.01ms !important;
  animation-iteration-count: 1 !important;
  transition-duration: 0.01ms !important;
  scroll-behavior: auto !important;
}

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--step-1);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  overflow-x: hidden;
}

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

a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-color: currentColor;
  text-underline-offset: 0.15em;
  text-decoration-thickness: 1px;
  transition: color var(--duration-fast) var(--ease-out);
}

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

ul, ol {
  list-style: none;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.1;
  text-wrap: balance;
}

h1 { font-size: var(--step-7); letter-spacing: -0.02em; }
h2 { font-size: var(--step-5); letter-spacing: -0.015em; }
h3 { font-size: var(--step-4); }
h4 { font-size: var(--step-3); }

.skip-link {
  position: absolute;
  left: -9999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.skip-link:focus {
  position: fixed;
  left: var(--space-4);
  top: var(--space-4);
  width: auto;
  height: auto;
  padding: var(--space-3) var(--space-5);
  background: var(--ink);
  color: var(--paper);
  z-index: 1000;
  font-size: var(--step-1);
  text-decoration: none;
}

/* Masthead */
.masthead {
  border-bottom: 2px solid var(--ink);
  padding: var(--space-6) var(--bleed);
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: var(--space-6);
  background: var(--paper);
}

.masthead-title {
  font-family: var(--font-display);
  font-size: var(--step-4);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.masthead-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-6);
  justify-content: space-between;
}

.masthead-links {
  display: flex;
  gap: var(--space-5);
  font-family: var(--font-sans);
  font-size: var(--step-0);
  font-weight: 500;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.masthead-links a {
  color: var(--ink-soft);
  text-decoration: none;
  transition: color var(--duration-fast);
}

.masthead-links a:hover {
  color: var(--ink);
  text-decoration: underline;
}

.masthead-meta {
  grid-column: 1 / -1;
  display: flex;
  gap: var(--space-6);
  font-family: var(--font-sans);
  font-size: var(--step--1);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-faint);
  border-top: 1px solid var(--rule);
  padding-top: var(--space-3);
}

/* Hero / Cover */
.cover-story {
  padding: var(--space-24) var(--bleed) var(--space-20);
  max-width: var(--page-width);
  margin: 0 auto;
  position: relative;
  border-bottom: 1px solid var(--rule-strong);
}

.cover-content {
  max-width: var(--measure-wide);
  animation: fadeUp var(--duration-reveal) var(--ease-out) both;
  animation-delay: 80ms;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.rubric {
  font-family: var(--font-sans);
  font-size: var(--step-0);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.cover-story h1 {
  font-size: clamp(var(--step-6), 5.5vw, var(--step-7));
  line-height: 1.05;
  max-width: 12ch;
  margin-bottom: var(--space-6);
}

.deck {
  font-size: var(--step-3);
  line-height: 1.5;
  color: var(--ink-soft);
  max-width: var(--measure);
  margin-bottom: var(--space-6);
}

.byline {
  font-family: var(--font-sans);
  font-size: var(--step-0);
  color: var(--ink-faint);
  letter-spacing: 0.04em;
}

.cover-media {
  position: absolute;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
}

.cover-media::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    160deg,
    rgba(246, 242, 234, 0) 40%,
    rgba(246, 242, 234, 0.88) 70%,
    var(--paper) 100%
  );
}

.cover-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.85) contrast(1.05);
}

/* Proof labels */
.proof-real, .proof-demo, .proof-concept {
  font-family: var(--font-sans);
  font-size: var(--step--1);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: var(--space-1) var(--space-2);
  border-radius: 2px;
  white-space: nowrap;
  display: inline-block;
}

.proof-real {
  color: var(--proof-real);
  background: var(--proof-real-bg);
  border: 1px solid rgba(27, 107, 66, 0.22);
}

.proof-demo {
  color: var(--proof-demo);
  background: var(--proof-demo-bg);
  border: 1px solid rgba(138, 109, 27, 0.22);
}

.proof-concept {
  color: var(--proof-concept);
  background: var(--proof-concept-bg);
  border: 1px solid rgba(43, 79, 138, 0.22);
}

.credit {
  font-family: var(--font-sans);
  font-size: var(--step--1);
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: var(--space-2);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}

/* Spreads */
.spread {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: start;
  padding: var(--space-16) 0;
  border-bottom: 1px solid var(--rule-strong);
}

.spread-text {
  padding-right: var(--space-6);
}

.spread h3 {
  font-size: var(--step-5);
  margin-bottom: var(--space-3);
  line-height: 1.1;
}

.spread p {
  font-size: var(--step-2);
  line-height: 1.65;
  color: var(--ink-soft);
  margin-bottom: var(--space-4);
}

.spread-image {
  position: relative;
  overflow: hidden;
  border-radius: 2px;
  aspect-ratio: 4 / 5;
  background: var(--paper-warm);
}

.spread-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--duration-slow) var(--ease-in-out);
}

.spread-image:hover img {
  transform: scale(1.03);
}

.spread-alt {
  direction: rtl;
}

.spread-alt > * {
  direction: ltr;
}

.spread-alt .spread-text {
  padding-right: 0;
  padding-left: var(--space-6);
}

.spread-alt .spread-image {
  order: -1;
}

/* Section divider */
.section-divider {
  padding: var(--space-20) var(--bleed) 0;
  max-width: var(--page-width);
  margin: 0 auto;
}

.section-label {
  font-size: var(--step-3);
  font-family: var(--font-sans);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: var(--space-10);
  padding-bottom: var(--space-3);
  border-bottom: 2px solid var(--ink);
  display: flex;
  align-items: baseline;
  gap: var(--space-3);
}

.section-label .num {
  font-family: var(--font-display);
  font-size: var(--step-5);
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.02em;
  text-transform: none;
}

/* Short reads */
.short-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
  padding-bottom: var(--space-20);
  border-bottom: 1px solid var(--rule-strong);
}

.short-card {
  border-top: 2px solid var(--ink);
  padding-top: var(--space-4);
}

.short-card h3 {
  font-size: var(--step-3);
  margin-bottom: var(--space-2);
  line-height: 1.15;
}

.short-card p {
  font-size: var(--step-1);
  line-height: 1.65;
  color: var(--ink-soft);
}

/* Case studies */
.case-studies {
  padding: var(--space-24) var(--bleed);
  max-width: var(--page-width);
  margin: 0 auto;
}

.case-studies-header {
  margin-bottom: var(--space-20);
  border-bottom: 1px solid var(--rule-strong);
  padding-bottom: var(--space-8);
}

.case-studies-header h2 {
  font-size: var(--step-6);
  max-width: 10ch;
  margin-bottom: var(--space-5);
}

.case-studies-lead {
  font-size: var(--step-2);
  line-height: 1.6;
  color: var(--ink-soft);
  max-width: var(--measure);
}

/* Long-form article */
.longform {
  padding: var(--space-20) var(--bleed);
  max-width: var(--page-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr var(--measure);
  gap: var(--space-16);
  align-items: start;
  border-bottom: 1px solid var(--rule-strong);
}

.longform-media {
  position: relative;
  border-radius: 2px;
  overflow: hidden;
  aspect-ratio: 3 / 4;
  background: var(--paper-warm);
}

.longform-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--duration-slow) var(--ease-in-out);
}

.longform-media:hover img {
  transform: scale(1.04);
}

.longform-body {
  padding-top: var(--space-4);
}

.longform-body h3 {
  font-size: var(--step-5);
  margin-bottom: var(--space-4);
  line-height: 1.15;
}

.longform-body p {
  font-size: var(--step-2);
  line-height: 1.7;
  margin-bottom: var(--space-5);
  color: var(--ink-soft);
}

.pull-quote {
  font-family: var(--font-display);
  font-size: var(--step-4);
  font-style: italic;
  line-height: 1.3;
  color: var(--ink);
  padding: var(--space-6) 0;
  margin: var(--space-6) 0;
  border-top: 2px solid var(--accent);
  border-bottom: 2px solid var(--accent);
  max-width: var(--measure-narrow);
}

.source-note {
  font-family: var(--font-sans);
  font-size: var(--step--1);
  color: var(--ink-fainter);
  letter-spacing: 0.04em;
  margin-top: var(--space-2);
  display: block;
}

/* Context panel (text selection trigger) */
.context-panel {
  position: fixed;
  right: clamp(var(--space-4), 3vw, var(--space-8));
  bottom: clamp(var(--space-4), 3vw, var(--space-8));
  width: min(320px, calc(100vw - var(--space-8)));
  background: var(--paper);
  border: 1px solid var(--rule-strong);
  border-radius: 4px;
  box-shadow: 0 10px 40px rgba(20, 18, 14, 0.12), 0 2px 8px rgba(20, 18, 14, 0.06);
  padding: var(--space-5);
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
  transition: opacity var(--duration-base) var(--ease-out), transform var(--duration-base) var(--ease-out);
  z-index: 100;
  font-family: var(--font-sans);
  font-size: var(--step-0);
  line-height: 1.55;
  color: var(--ink-soft);
}

.context-panel.active {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.context-panel-header {
  font-family: var(--font-display);
  font-size: var(--step-2);
  font-weight: 700;
  margin-bottom: var(--space-2);
  color: var(--ink);
}

.context-panel-proof {
  font-size: var(--step--1);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: var(--space-3);
  display: inline-block;
}

/* Guide route */
.guide-route {
  padding: var(--space-20) var(--bleed);
  max-width: var(--measure);
  margin: 0 auto;
}

.guide-route h1 {
  font-size: var(--step-6);
  margin-bottom: var(--space-6);
}

.guide-route h2 {
  font-size: var(--step-4);
  margin-top: var(--space-12);
  margin-bottom: var(--space-5);
}

.guide-route p {
  font-size: var(--step-2);
  line-height: 1.7;
  color: var(--ink-soft);
  margin-bottom: var(--space-5);
  max-width: var(--measure);
}

.guide-route ul {
  list-style: disc;
  padding-left: var(--space-6);
  color: var(--ink-soft);
  display: grid;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
}

.guide-route ul li {
  font-size: var(--step-1);
}

.guide-route .back-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-sans);
  font-size: var(--step-0);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--accent);
  margin-bottom: var(--space-8);
}

.guide-route .back-link:hover {
  text-decoration: underline;
}

/* Page footer */
.page-footer {
  padding: var(--space-16) var(--bleed) var(--space-20);
  max-width: var(--page-width);
  margin: 0 auto;
  border-top: 1px solid var(--rule-strong);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-6);
  align-items: baseline;
  justify-content: space-between;
  font-family: var(--font-sans);
  font-size: var(--step-0);
  color: var(--ink-faint);
}

.page-footer a {
  color: var(--ink-soft);
  text-decoration: none;
  font-weight: 500;
}

.page-footer a:hover {
  color: var(--accent);
  text-decoration: underline;
}

/* Responsive */
@media (max-width: 900px) {
  .spread {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .spread-alt {
    direction: ltr;
  }

  .spread-alt .spread-text {
    padding-right: 0;
    padding-left: 0;
  }

  .spread-image {
    aspect-ratio: 16 / 9;
  }

  .short-grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .longform {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .cover-story {
    padding-top: var(--space-16);
    padding-bottom: var(--space-12);
  }
}

@media (max-width: 560px) {
  :root {
    --bleed: var(--space-4);
  }

  .masthead {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .masthead-links {
    font-size: var(--step--1);
    gap: var(--space-3);
  }

  .cover-story h1 {
    font-size: var(--step-6);
  }

  .case-studies-header h2,
  .longform h3 {
    font-size: var(--step-4);
  }

  .section-label .num {
    font-size: var(--step-4);
  }
}

/* Reduced motion from OS preference */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .cover-content,
  .longform,
  .spread,
  .spread-image img,
  .longform-media img {
    opacity: 1 !important;
    transform: none !important;
  }
}

/* Print-friendly dark mode nobody asked for but I like */
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #13110d;
    --paper-warm: #181510;
    --ink: #ece4d8;
    --ink-soft: rgba(236, 228, 216, 0.8);
    --ink-faint: rgba(236, 228, 216, 0.5);
    --ink-fainter: rgba(236, 228, 216, 0.2);
    --rule: rgba(236, 228, 216, 0.14);
    --rule-strong: rgba(236, 228, 216, 0.3);
    --accent: #e07a5d;
    --accent-ink: #f2a08a;
  }

  .cover-media::after {
    background: linear-gradient(
      160deg,
      rgba(19, 17, 13, 0) 40%,
      rgba(19, 17, 13, 0.88) 70%,
      var(--paper) 100%
    );
  }
}