/* =========================================================
   Ivander William — Personal Site (refined)
   Editorial + modern minimalist. Type-led.
   ========================================================= */

:root {
  /* Neutrals — warm-tinted paper whites and near-blacks */
  --canvas: #fbfaf7;
  --canvas_2: #f4f2ec;
  --canvas_3: #eae7de;
  --ink: #1a1a1a;
  --ink_2: #4a4a48;
  --ink_3: #868480;
  --line: #d9d5ca;
  --line_2: #e6e2d7;

  /* Single accent — warm terracotta; easy to retune via Tweaks */
  --accent: #b8502d;
  --accent_ink: #7a2e14;
  --accent_wash: #f2e2d7;

  /* Type */
  --f_display: "Instrument Serif", "Times New Roman", Georgia, serif;
  --f_sans: "Inter Tight", ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --f_mono: "JetBrains Mono", ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

  /* Spacing */
  --s1: 4px; --s2: 8px; --s3: 12px; --s4: 16px;
  --s5: 24px; --s6: 32px; --s7: 48px; --s8: 64px;
  --s9: 96px; --s10: 128px;

  --r_sm: 4px; --r_md: 8px; --r_lg: 14px; --r_xl: 22px;

  --container: 1120px;
  --container_narrow: 720px;
  --grid_gutter: 24px;
}

[data-theme="dark"] {
  --canvas: #15140f;
  --canvas_2: #1d1c16;
  --canvas_3: #26251d;
  --ink: #f2efe6;
  --ink_2: #b8b4a6;
  --ink_3: #85827a;
  --line: #2f2d25;
  --line_2: #24231c;
  --accent: #e6865d;
  --accent_ink: #f2a884;
  --accent_wash: #2a1c15;
}

/* =========================================================
   Reset
   ========================================================= */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--f_sans);
  font-size: 16px;
  line-height: 1.55;
  color: var(--ink);
  background: var(--canvas);
  font-feature-settings: "ss01", "cv11";
  -webkit-font-smoothing: antialiased;
  transition: background 0.25s ease, color 0.25s ease;
}
a { color: inherit; text-decoration: none; }
p { margin: 0 0 1em; }
img { max-width: 100%; display: block; }
hr { border: 0; border-top: 1px solid var(--line); margin: 0; }
::selection { background: var(--accent_wash); color: var(--accent_ink); }

/* =========================================================
   Layout
   ========================================================= */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--s5);
}
.container.narrow { max-width: var(--container_narrow); }

section { padding: var(--s8) 0; }

/* Utility */
.mono {
  font-family: var(--f_mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--ink_3);
  text-transform: uppercase;
}

/* =========================================================
   Nav
   ========================================================= */
.nav_bar {
  position: sticky;
  top: 0;
  z-index: 20;
  background: color-mix(in oklab, var(--canvas) 88%, transparent);
  backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid var(--line_2);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--f_display);
  font-size: 20px;
  color: var(--ink);
  letter-spacing: -0.01em;
}
.brand .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent);
  display: inline-block;
}
.nav_links {
  display: flex;
  gap: 4px;
  align-items: center;
  font-size: 13px;
}
.nav_links a {
  color: var(--ink_2);
  padding: 6px 12px;
  border-radius: 100px;
  transition: all 0.15s ease;
}
.nav_links a:hover { color: var(--ink); background: var(--canvas_2); }
.nav_links a.active { color: var(--ink); }
.nav_links a.nav_active {
  color: var(--ink);
  background: var(--canvas_2);
  font-weight: 500;
}

.icon_btn {
  width: 34px; height: 34px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 100px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink_2);
  cursor: pointer;
  transition: all 0.15s ease;
}
.icon_btn:hover { color: var(--ink); border-color: var(--ink_3); }
.icon_btn svg { width: 15px; height: 15px; }

.nav_cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border-radius: 100px;
  background: var(--ink);
  color: var(--canvas);
  font-size: 13px;
  font-weight: 500;
  transition: all 0.15s ease;
}
.nav_cta:hover { background: var(--accent); color: #fff; }

/* =========================================================
   Hero — editorial
   ========================================================= */

/* Ambient glow blob that slowly breathes in the background */
@keyframes hero-blob {
  0%   { transform: translate(0, 0) scale(1);    opacity: 0.55; }
  100% { transform: translate(-28px, 22px) scale(1.1); opacity: 0.85; }
}

/* One-time shimmer sweep on the status pill */
@keyframes pill-shine {
  0%   { background-position: -120% center; }
  100% { background-position: 220% center; }
}

/* Underline draws onto the <em> accent word */
@keyframes em-underline {
  from { transform: scaleX(0); }
  to   { transform: scaleX(1); }
}

.hero {
  padding: var(--s9) 0 var(--s8);
  position: relative;
  overflow: hidden;
  text-align: center;
}

/* The breathing blob — sits behind all hero content */
.hero::before {
  content: '';
  position: absolute;
  top: -20%;
  right: -8%;
  width: min(60vw, 680px);
  height: min(60vw, 680px);
  border-radius: 50%;
  background: radial-gradient(
    circle at center,
    color-mix(in oklab, var(--accent_wash) 75%, transparent) 0%,
    transparent 65%
  );
  animation: hero-blob 7s ease-in-out infinite alternate;
  pointer-events: none;
  z-index: 0;
}

/* Keep text above the blob */
.hero .container { position: relative; z-index: 1; }

.status_pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--f_mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink_2);
  padding: 6px 12px;
  border-radius: 100px;
  background: var(--canvas_2);
  border: 1px solid var(--line_2);
}
.status_pill .live {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: #22a866;
  box-shadow: 0 0 0 0 rgba(34, 168, 102, 0.6);
  animation: pulse 2.2s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(34, 168, 102, 0.6); }
  70% { box-shadow: 0 0 0 8px rgba(34, 168, 102, 0); }
  100% { box-shadow: 0 0 0 0 rgba(34, 168, 102, 0); }
}

.hero h1 {
  font-family: var(--f_display);
  font-weight: 400;
  font-size: clamp(44px, 6.8vw, 88px);
  line-height: 1.02;
  letter-spacing: -0.025em;
  margin: var(--s5) 0 var(--s5);
  max-width: 100%;
  color: var(--ink);
}
.hero h1 em {
  font-style: italic;
  color: var(--accent);
}

/* Hand-drawn circle highlight */
@keyframes circle-draw {
  from { stroke-dashoffset: 680; }
  to   { stroke-dashoffset: 0; }
}

.hero h1 em.circled {
  position: relative;
  display: inline-block;
}

.circle_svg {
  position: absolute;
  top: -28%;
  left: -6%;
  width: 112%;
  height: 155%;
  pointer-events: none;
  overflow: visible;
}

.circle_svg ellipse {
  fill: none;
  stroke: var(--accent);
  stroke-width: 3;
  stroke-linecap: round;
  opacity: 0.6;
  stroke-dasharray: 680;
  stroke-dashoffset: 0;
  animation: circle-draw 0.85s cubic-bezier(0.4, 0, 0.2, 1) 1.1s backwards;
}

.hero_sub {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s8);
  align-items: start;
  margin-top: var(--s7);
  padding-top: var(--s6);
  border-top: 1px solid var(--line);
  text-align: left;
}
.hero_lede {
  font-size: 18px;
  line-height: 1.5;
  color: var(--ink);
  max-width: 46ch;
  margin: 0;
  font-weight: 400;
}
.hero_lede b { font-weight: 600; }

.hero_facts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s4) var(--s5);
  font-size: 13px;
}
.hero_facts dt {
  font-family: var(--f_mono);
  font-size: 11px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink_3);
  margin-bottom: 2px;
}
.hero_facts dd {
  margin: 0;
  color: var(--ink);
  font-size: 14px;
  line-height: 1.4;
}

.hero_cta {
  display: flex;
  gap: 10px;
  margin-top: var(--s6);
  flex-wrap: wrap;
  justify-content: center;
}

/* =========================================================
   Buttons
   ========================================================= */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 20px;
  font-size: 14px;
  font-weight: 500;
  border-radius: 100px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.18s ease;
  font-family: inherit;
  line-height: 1;
}
.btn svg { width: 14px; height: 14px; }
.btn_primary { background: var(--ink); color: var(--canvas); }
.btn_primary:hover { background: var(--accent); color: #fff; transform: translateY(-1px); }
.btn_ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn_ghost:hover { border-color: var(--ink); }

/* =========================================================
   Metric strip (below hero)
   ========================================================= */
.metric_row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  margin-top: var(--s7);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.metric_cell {
  padding: var(--s5) var(--s4);
  border-right: 1px solid var(--line_2);
}
.metric_cell:last-child { border-right: none; }
.metric_val {
  font-family: var(--f_display);
  font-size: 56px;
  font-weight: 400;
  line-height: 1;
  color: var(--ink);
  letter-spacing: -0.02em;
}
.metric_val em { font-style: italic; color: var(--accent); }
.metric_lbl {
  margin-top: var(--s3);
  font-size: 13px;
  color: var(--ink_2);
  line-height: 1.4;
  max-width: 22ch;
}

/* =========================================================
   Section header
   ========================================================= */
.section_head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--s5);
  margin-bottom: var(--s7);
  padding-bottom: var(--s3);
  border-bottom: 1px solid var(--line);
}
.section_head .label {
  font-family: var(--f_mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink_3);
}
.section_head h2 {
  font-family: var(--f_display);
  font-weight: 400;
  font-size: clamp(32px, 4vw, 48px);
  letter-spacing: -0.02em;
  line-height: 1.05;
  margin: 0;
  max-width: 18ch;
}
.section_head h2 em { font-style: italic; color: var(--accent); }
.section_head .meta {
  font-family: var(--f_mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink_3);
  white-space: nowrap;
}

/* =========================================================
   Featured case study (hero card)
   ========================================================= */
.feature_card {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 0;
  border: 1px solid var(--line);
  border-radius: var(--r_lg);
  overflow: hidden;
  background: var(--canvas_2);
  transition: all 0.25s ease;
  color: inherit;
}
.feature_card:hover {
  border-color: var(--ink_3);
  transform: translateY(-2px);
}
.feature_viz {
  position: relative;
  min-height: 380px;
  background:
    repeating-linear-gradient(45deg, transparent 0 10px, color-mix(in oklab, var(--accent) 12%, transparent) 10px 11px),
    linear-gradient(135deg, var(--accent_wash) 0%, var(--canvas_3) 100%);
  display: flex;
  align-items: flex-end;
  padding: var(--s5);
  overflow: hidden;
}
.feature_viz::before {
  content: "";
  position: absolute;
  top: 24px; left: 24px; right: 24px; bottom: 80px;
  border: 1px solid color-mix(in oklab, var(--ink) 12%, transparent);
  border-radius: var(--r_md);
  background: color-mix(in oklab, var(--canvas) 92%, transparent);
  backdrop-filter: blur(2px);
}
.feature_viz .viz_caption {
  position: relative;
  font-family: var(--f_mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink_2);
  z-index: 2;
}
.feature_viz .viz_glyph {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -60%);
  font-family: var(--f_display);
  font-style: italic;
  font-size: 120px;
  color: var(--accent);
  opacity: 0.9;
  line-height: 1;
  z-index: 1;
}
.feature_body {
  padding: var(--s7) var(--s6);
  display: flex;
  flex-direction: column;
  gap: var(--s4);
  justify-content: space-between;
  background: var(--canvas);
}
.feature_body .tag_row {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}
.feature_body h3 {
  font-family: var(--f_display);
  font-weight: 400;
  font-size: 34px;
  line-height: 1.1;
  letter-spacing: -0.015em;
  margin: 8px 0 12px;
}
.feature_body p {
  color: var(--ink_2);
  font-size: 15px;
  line-height: 1.55;
  max-width: 42ch;
}
.feature_stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--s4);
  padding-top: var(--s4);
  border-top: 1px solid var(--line_2);
}
.feature_stats .sv {
  font-family: var(--f_display);
  font-size: 22px;
  color: var(--accent);
  line-height: 1;
}
.feature_stats .sl {
  font-family: var(--f_mono);
  font-size: 10px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink_3);
  margin-top: 4px;
}
.feature_body .arrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--ink);
  font-weight: 500;
  margin-top: var(--s2);
}
.feature_body .arrow svg { transition: transform 0.2s ease; }
.feature_card:hover .feature_body .arrow svg { transform: translateX(4px); }

/* =========================================================
   Case tags
   ========================================================= */
.tag {
  display: inline-block;
  font-family: var(--f_mono);
  font-size: 10px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink_2);
  background: var(--canvas_2);
  border: 1px solid var(--line_2);
  padding: 4px 10px;
  border-radius: 100px;
}
.tag.accent {
  color: var(--accent_ink);
  background: var(--accent_wash);
  border-color: color-mix(in oklab, var(--accent) 30%, transparent);
}

/* =========================================================
   Secondary case grid
   ========================================================= */
.case_grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--s4);
  margin-top: var(--s4);
}
.case_card {
  display: block;
  padding: var(--s6);
  border: 1px solid var(--line);
  border-radius: var(--r_lg);
  background: var(--canvas);
  transition: all 0.2s ease;
  position: relative;
  overflow: hidden;
}
.case_card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 60%, color-mix(in oklab, var(--accent) 6%, transparent) 100%);
  opacity: 0;
  transition: opacity 0.25s ease;
  pointer-events: none;
}
.case_card:hover { border-color: var(--ink_3); transform: translateY(-2px); }
.case_card:hover::before { opacity: 1; }
.case_card .tag_row {
  display: flex;
  gap: 6px;
  margin-bottom: var(--s4);
}
.case_card h3 {
  font-family: var(--f_display);
  font-weight: 400;
  font-size: 24px;
  line-height: 1.15;
  margin: 0 0 var(--s3);
  letter-spacing: -0.01em;
}
.case_card p {
  color: var(--ink_2);
  font-size: 14px;
  line-height: 1.55;
  margin: 0;
}
.case_footer {
  margin-top: var(--s5);
  padding-top: var(--s4);
  border-top: 1px solid var(--line_2);
  display: flex;
  justify-content: space-between;
  font-family: var(--f_mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink_3);
}
.case_card .stat_row {
  display: flex;
  gap: var(--s5);
  margin-top: var(--s4);
}
.case_card .stat_row .sv {
  font-family: var(--f_display);
  font-size: 22px;
  color: var(--accent);
  line-height: 1;
}
.case_card .stat_row .sl {
  font-family: var(--f_mono);
  font-size: 10px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink_3);
  margin-top: 4px;
  line-height: 1.3;
}

/* =========================================================
   Experience timeline
   ========================================================= */
.xp_list { list-style: none; padding: 0; margin: 0; }
.xp_item {
  display: grid;
  grid-template-columns: 140px 1fr auto;
  gap: var(--s6);
  padding: var(--s6) 0;
  border-top: 1px solid var(--line);
  align-items: start;
}
.xp_item:last-child { border-bottom: 1px solid var(--line); }
.xp_date {
  font-family: var(--f_mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink_3);
  padding-top: 6px;
}
.xp_main .xp_role {
  font-family: var(--f_display);
  font-size: 28px;
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.01em;
  margin: 0 0 4px;
}
.xp_main .xp_org {
  font-size: 14px;
  color: var(--ink_2);
  margin: 0 0 var(--s4);
}
.xp_main .xp_org .sep { color: var(--ink_3); margin: 0 8px; }
.xp_main p {
  font-size: 14px;
  color: var(--ink_2);
  line-height: 1.55;
  margin: 0 0 var(--s3);
  max-width: 62ch;
}
.xp_main .highlights {
  display: flex;
  gap: var(--s5);
  flex-wrap: wrap;
  margin-top: var(--s4);
}
.xp_main .highlights .h_val {
  font-family: var(--f_display);
  font-size: 20px;
  color: var(--accent);
  line-height: 1;
}
.xp_main .highlights .h_lbl {
  font-family: var(--f_mono);
  font-size: 10px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink_3);
  margin-top: 4px;
}
.xp_tag {
  font-family: var(--f_mono);
  font-size: 10px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink_3);
  padding-top: 8px;
  white-space: nowrap;
}

/* =========================================================
   Principles
   ========================================================= */
.principles {
  background: var(--canvas_2);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: var(--s9) 0;
}
.principles_intro {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--s7);
  margin-bottom: var(--s7);
  align-items: end;
}
.principles_intro h2 {
  font-family: var(--f_display);
  font-weight: 400;
  font-size: clamp(40px, 5vw, 64px);
  line-height: 1;
  letter-spacing: -0.02em;
  margin: 0;
  max-width: 14ch;
}
.principles_intro h2 em { font-style: italic; color: var(--accent); }
.principles_intro p {
  color: var(--ink_2);
  font-size: 16px;
  max-width: 52ch;
  margin: 0;
}
.principles_grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid var(--line);
}
.principle {
  padding: var(--s6) var(--s5) var(--s6) 0;
  border-right: 1px solid var(--line_2);
}
.principle:last-child { border-right: none; padding-right: 0; }
.principle:first-child { padding-left: 0; }
.principle:not(:first-child) { padding-left: var(--s5); }
.principle .num {
  font-family: var(--f_mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--accent);
  display: block;
  margin-bottom: var(--s3);
}
.principle h4 {
  font-family: var(--f_display);
  font-weight: 400;
  font-size: 22px;
  line-height: 1.15;
  margin: 0 0 var(--s3);
  letter-spacing: -0.01em;
}
.principle p {
  font-size: 14px;
  color: var(--ink_2);
  line-height: 1.55;
  margin: 0;
}

/* =========================================================
   Tools grid
   ========================================================= */
.tools_grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border: 1px solid var(--line);
  border-radius: var(--r_lg);
  overflow: hidden;
}
.tool_row {
  padding: var(--s5);
  border-right: 1px solid var(--line_2);
  border-bottom: 1px solid var(--line_2);
}
.tool_row:nth-child(4n) { border-right: none; }
.tool_row:nth-last-child(-n+4) { border-bottom: none; }
.tool_row h5 {
  font-family: var(--f_mono);
  font-size: 10px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink_3);
  margin: 0 0 var(--s3);
  font-weight: 500;
}
.tool_row ul {
  list-style: none;
  padding: 0;
  margin: 0;
  font-size: 14px;
  color: var(--ink);
  line-height: 1.7;
}
.tool_row li { padding: 2px 0; }

/* =========================================================
   About / bio
   ========================================================= */
.about_grid {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: var(--s8);
  align-items: start;
}
.about_portrait {
  aspect-ratio: 4/5;
  border-radius: var(--r_lg);
  background:
    repeating-linear-gradient(-12deg, var(--canvas_3) 0 14px, var(--canvas_2) 14px 16px);
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
}
.about_portrait .label {
  position: absolute;
  bottom: var(--s4);
  left: var(--s4);
  font-family: var(--f_mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink_2);
  background: color-mix(in oklab, var(--canvas) 85%, transparent);
  padding: 6px 10px;
  border-radius: 100px;
  border: 1px solid var(--line_2);
}
.about_portrait .mono_xl {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--f_display);
  font-style: italic;
  font-size: 160px;
  color: var(--accent);
  line-height: 1;
  letter-spacing: -0.04em;
}
.about_body h2 {
  font-family: var(--f_display);
  font-weight: 400;
  font-size: clamp(32px, 4vw, 52px);
  line-height: 1.05;
  margin: 0 0 var(--s5);
  letter-spacing: -0.02em;
  max-width: 16ch;
}
.about_body h2 em { font-style: italic; color: var(--accent); }
.about_body p {
  font-size: 17px;
  color: var(--ink);
  line-height: 1.6;
  margin: 0 0 var(--s4);
  max-width: 52ch;
}
.about_body p.muted { color: var(--ink_2); font-size: 15px; }

.fact_list {
  list-style: none;
  padding: 0;
  margin: var(--s5) 0 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border-top: 1px solid var(--line);
}
.fact_list li {
  display: flex;
  justify-content: space-between;
  padding: 12px 0;
  font-size: 14px;
  border-bottom: 1px solid var(--line_2);
  gap: var(--s4);
}
.fact_list li:nth-child(odd) { padding-right: var(--s5); border-right: 1px solid var(--line_2); }
.fact_list li:nth-child(even) { padding-left: var(--s5); }
.fact_list .k {
  font-family: var(--f_mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink_3);
}
.fact_list .v { color: var(--ink); text-align: right; }

/* =========================================================
   CTA block
   ========================================================= */
.cta_block {
  padding: var(--s10) var(--s6);
  border: 1px solid var(--line);
  border-radius: var(--r_xl);
  background:
    radial-gradient(ellipse at top right, var(--accent_wash) 0%, transparent 55%),
    var(--canvas_2);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta_block h2 {
  font-family: var(--f_display);
  font-weight: 400;
  font-size: clamp(40px, 5.5vw, 72px);
  line-height: 1.02;
  letter-spacing: -0.025em;
  margin: 0 auto var(--s5);
  max-width: 14ch;
}
.cta_block h2 em { font-style: italic; color: var(--accent); }
.cta_block p {
  color: var(--ink_2);
  font-size: 17px;
  max-width: 48ch;
  margin: 0 auto var(--s6);
}
.cta_block .cta_row {
  display: inline-flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
}
.cta_contact {
  font-family: var(--f_mono);
  font-size: 13px;
  color: var(--ink_2);
  margin-top: var(--s5);
}
.cta_contact a { color: var(--ink); border-bottom: 1px solid var(--line); }
.cta_contact a:hover { color: var(--accent); border-color: var(--accent); }

/* =========================================================
   Footer
   ========================================================= */
.site_footer {
  padding: var(--s7) 0 var(--s5);
  border-top: 1px solid var(--line);
  margin-top: var(--s9);
}
.foot {
  display: flex;
  justify-content: space-between;
  gap: var(--s5);
  flex-wrap: wrap;
  align-items: center;
  font-family: var(--f_mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink_3);
}
.foot a { color: var(--ink_2); }
.foot a:hover { color: var(--accent); }
.foot .links { display: flex; gap: var(--s4); flex-wrap: wrap; }

/* =========================================================
   Tweaks panel (floating)
   ========================================================= */
.tweak_panel {
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 260px;
  background: var(--canvas);
  border: 1px solid var(--line);
  border-radius: var(--r_lg);
  padding: var(--s4) var(--s5);
  box-shadow: 0 12px 32px rgba(0,0,0,0.08);
  font-size: 13px;
  z-index: 50;
  display: none;
}
[data-tweaks="on"] .tweak_panel { display: block; }
.tweak_panel h5 {
  font-family: var(--f_mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink_3);
  margin: 0 0 var(--s3);
  font-weight: 500;
}
.tweak_panel h5:not(:first-child) { margin-top: var(--s4); }
.tweak_row {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}
.swatch {
  width: 22px; height: 22px;
  border-radius: 50%;
  cursor: pointer;
  border: 2px solid transparent;
  transition: transform 0.15s ease;
}
.swatch:hover { transform: scale(1.1); }
.swatch.active { border-color: var(--ink); }
.seg {
  display: inline-flex;
  border: 1px solid var(--line);
  border-radius: 100px;
  overflow: hidden;
  background: var(--canvas_2);
}
.seg button {
  padding: 6px 12px;
  font-size: 11px;
  font-family: var(--f_mono);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink_2);
  background: transparent;
  border: none;
  cursor: pointer;
}
.seg button.on {
  background: var(--ink);
  color: var(--canvas);
}

/* =========================================================
   Case study page (reused)
   ========================================================= */
.cs_hero { padding: var(--s8) 0 var(--s5); }
.cs_hero .tag_row {
  display: flex; gap: 6px; margin-bottom: var(--s4);
}
.cs_hero h1 {
  font-family: var(--f_display);
  font-weight: 400;
  font-size: clamp(36px, 5vw, 60px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  max-width: 18ch;
  margin: 0 0 var(--s4);
}
.cs_hero .lede {
  font-size: 18px;
  color: var(--ink_2);
  max-width: 60ch;
  line-height: 1.5;
  margin: 0;
}
.cs_meta {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  padding: 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  margin-top: var(--s6);
}
.cs_meta > div {
  padding: var(--s4) var(--s4) var(--s4) 0;
  border-right: 1px solid var(--line_2);
}
.cs_meta > div:last-child { border-right: none; }
.cs_meta > div:not(:first-child) { padding-left: var(--s4); }
.cs_meta dt {
  font-family: var(--f_mono);
  font-size: 10px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink_3);
  margin-bottom: 4px;
}
.cs_meta dd { margin: 0; font-size: 14px; color: var(--ink); }

.cs_body {
  max-width: var(--container_narrow);
  margin: 0 auto;
  padding: var(--s8) var(--s5);
  font-size: 17px;
  line-height: 1.7;
}
.cs_body h2 {
  font-family: var(--f_display);
  font-weight: 400;
  font-size: 32px;
  line-height: 1.1;
  letter-spacing: -0.015em;
  margin: var(--s7) 0 var(--s4);
}
.cs_body h2:first-child { margin-top: 0; }
.cs_body h3 { font-size: 18px; margin-top: var(--s5); margin-bottom: var(--s3); }
.cs_body p { color: var(--ink); margin: 0 0 var(--s4); }
.cs_body ul { padding-left: var(--s5); color: var(--ink_2); }
.cs_body ul li { margin-bottom: var(--s2); }
.cs_body blockquote {
  margin: var(--s6) 0;
  padding: var(--s4) var(--s5);
  border-left: 3px solid var(--accent);
  background: var(--canvas_2);
  color: var(--ink);
  font-family: var(--f_display);
  font-style: italic;
  font-size: 22px;
  line-height: 1.3;
  border-radius: 0 var(--r_md) var(--r_md) 0;
}
.cs_body blockquote p { margin: 0; }
.outcome_grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--s4);
  margin: var(--s5) 0;
}
.outcome_grid > div {
  padding: var(--s5) var(--s4);
  background: var(--canvas_2);
  border: 1px solid var(--line_2);
  border-radius: var(--r_md);
}
.outcome_value {
  font-family: var(--f_display);
  font-size: 40px;
  color: var(--accent);
  line-height: 1;
}
.outcome_label {
  font-family: var(--f_mono);
  font-size: 10px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink_3);
  margin-top: var(--s3);
}
.placeholder_note {
  display: block;
  font-family: var(--f_mono);
  font-size: 11px;
  color: var(--ink_3);
  background: var(--canvas_2);
  border: 1px dashed var(--line);
  padding: var(--s3);
  border-radius: var(--r_md);
  margin: var(--s4) 0;
}
.cs_nav {
  border-top: 1px solid var(--line);
  padding: var(--s5) 0;
  display: flex;
  justify-content: space-between;
  font-family: var(--f_mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink_2);
}
.cs_nav a:hover { color: var(--accent); }

/* =========================================================
   Responsive
   ========================================================= */
@media (max-width: 900px) {
  .hero_sub { grid-template-columns: 1fr; gap: var(--s5); }
  .metric_row { grid-template-columns: 1fr 1fr; }
  .metric_cell:nth-child(2) { border-right: none; }
  .metric_cell:nth-child(1), .metric_cell:nth-child(2) { border-bottom: 1px solid var(--line_2); }
  .feature_card { grid-template-columns: 1fr; }
  .feature_viz { min-height: 260px; }
  .feature_body { padding: var(--s6); }
  .case_grid { grid-template-columns: 1fr; }
  .principles_intro { grid-template-columns: 1fr; gap: var(--s4); }
  .principles_grid { grid-template-columns: 1fr 1fr; }
  .principle { padding: var(--s5) !important; border-right: 1px solid var(--line_2); border-bottom: 1px solid var(--line_2); }
  .principle:nth-child(2n) { border-right: none; }
  .principle:nth-last-child(-n+2) { border-bottom: none; }
  .tools_grid { grid-template-columns: 1fr 1fr; }
  .tool_row:nth-child(2n) { border-right: none; }
  .tool_row:nth-child(4n) { border-right: 1px solid var(--line_2); }
  .about_grid { grid-template-columns: 1fr; gap: var(--s6); }
  .about_portrait { aspect-ratio: 16/10; }
  .about_portrait .mono_xl { font-size: 100px; }
  .fact_list { grid-template-columns: 1fr; }
  .fact_list li:nth-child(odd) { padding-right: 0; border-right: none; }
  .fact_list li:nth-child(even) { padding-left: 0; }
  .xp_item { grid-template-columns: 1fr; gap: var(--s3); }
  .xp_tag { padding-top: 0; }
  .cs_meta { grid-template-columns: 1fr 1fr; }
  .cs_meta > div { padding: var(--s3) !important; border-bottom: 1px solid var(--line_2); }
  .outcome_grid { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  .metric_row { grid-template-columns: 1fr; }
  .metric_cell { border-right: none; border-bottom: 1px solid var(--line_2); }
  .metric_cell:last-child { border-bottom: none; }
  .metric_val { font-size: 44px; }
  .principles_grid { grid-template-columns: 1fr; }
  .principle { border-right: none !important; }
  .tools_grid { grid-template-columns: 1fr; }
  .tool_row { border-right: none !important; }
  .nav_links a:not(.nav_cta) { display: none; }
  .tweak_panel { left: 12px; right: 12px; width: auto; bottom: 12px; }
  .cta_block { padding: var(--s7) var(--s4); }
}

/* =========================================================
   Scroll-reveal — sections fade up as they enter viewport
   ========================================================= */
@media (prefers-reduced-motion: no-preference) {
  [data-reveal] {
    opacity: 0;
    transform: translateY(28px);
    transition:
      opacity 0.65s cubic-bezier(0.16, 1, 0.3, 1),
      transform 0.65s cubic-bezier(0.16, 1, 0.3, 1);
  }
  [data-reveal].is-visible {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Card lift on hover */
.feature_card,
.case_card {
  transition:
    transform 0.22s cubic-bezier(0.16, 1, 0.3, 1),
    box-shadow 0.22s cubic-bezier(0.16, 1, 0.3, 1);
}
.feature_card:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 40px -8px color-mix(in oklab, var(--ink) 12%, transparent);
}
.case_card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px -6px color-mix(in oklab, var(--ink) 10%, transparent);
}