/* ============================================================
   TWOEN · PRACTICE / v1  ·  styles
   ============================================================
   Architecture:
   - Body is a vertical scroll-snap container.
   - Each .page section is 100vh, dark backdrop.
   - Each .sheet inside is the cream "paper" floating on dark.
   - Sheets fill the page minus padding; flex column with
     head / body / foot rows. Footer always visible at bottom.
   - Mobile: tighter padding, smaller fonts, stacked layouts.
   ============================================================ */


/* —— TOKENS —— */

:root {
  /* Color palette — same as the brief */
  --paper: #F2EDE3;
  --paper-deep: #EAE3D5;
  --ink: #1A1814;
  --ink-soft: #6B6055;
  --ink-faint: #A89E8E;
  --accent: #B5471F;
  --rule: #D4C9B5;
  --rule-soft: #E2D9C7;

  /* Dark backdrop — slightly deeper than ink for contrast */
  --dark: #0F0E0C;

  /* Type families */
  --serif: 'IBM Plex Serif', Georgia, serif;
  --sans:  'IBM Plex Sans', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  --mono:  'IBM Plex Mono', ui-monospace, 'SF Mono', Menlo, monospace;
  --mark:  'Fraunces', 'IBM Plex Serif', Georgia, serif;

  /* Sheet sizing */
  --sheet-max: 56rem;        /* ~896px desktop ceiling */
  --sheet-pad-x: 4rem;
  --sheet-pad-y: 3rem;

  /* Page outer padding (the dark margin around the sheet) */
  --page-pad: 1.5rem;
}


/* —— RESET / BASE —— */

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

html {
  scroll-snap-type: y mandatory;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  background: var(--dark);
  color: var(--ink);
  font-family: var(--sans);
  font-weight: 300;
  line-height: 1.55;
  font-feature-settings: "kern", "liga", "calt";
}

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

sup { font-feature-settings: "sups" off; }


/* —— PAGE LAYOUT —— */

.brief {
  display: block;
}

.page {
  scroll-snap-align: start;
  scroll-snap-stop: always;
  min-height: 100vh;
  min-height: 100svh; /* small viewport unit, better on mobile with browser chrome */
  display: flex;
  align-items: stretch;
  justify-content: center;
  padding: var(--page-pad);
  background: var(--dark);
}

.sheet {
  background: var(--paper);
  width: 100%;
  max-width: var(--sheet-max);
  min-height: calc(100vh - 2 * var(--page-pad));
  min-height: calc(100svh - 2 * var(--page-pad));
  padding: var(--sheet-pad-y) var(--sheet-pad-x);
  display: flex;
  flex-direction: column;
  position: relative;
  box-shadow:
    0 0.5pt 1pt rgba(0, 0, 0, 0.20),
    0 18px 36px rgba(0, 0, 0, 0.35);
}

.sheet__head {
  flex-shrink: 0;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-family: var(--mono);
  font-size: 0.6875rem;       /* ~11px */
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-soft);
  border-bottom: 1px solid var(--rule);
  padding-bottom: 0.75rem;
  gap: 1rem;
}

.sheet__head .dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  margin-right: 8px;
  vertical-align: middle;
}

.sheet__body {
  flex: 1 1 auto;
  display: flex;
  flex-direction: column;
  padding: 2.5rem 0;
  min-height: 0;
}
.sheet__body--center {
  justify-content: center;
}

.sheet__foot {
  flex-shrink: 0;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  font-family: var(--mono);
  font-size: 0.625rem;        /* ~10px */
  letter-spacing: 0.20em;
  text-transform: uppercase;
  color: var(--ink-soft);
  border-top: 1px solid var(--rule);
  padding-top: 0.75rem;
  gap: 1rem;
}

.sheet__foot--cover {
  align-items: flex-end;
}

.foot-cluster {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
}

.foot-meta {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.foot-label {
  color: var(--ink-faint);
  font-size: 0.5625rem;       /* ~9px */
  letter-spacing: 0.20em;
}

.foot-val {
  color: var(--ink);
  font-size: 0.6875rem;
  letter-spacing: 0.22em;
}

/* Cover footer: make "Anyone scrolling past" stand out as the human voice in the metadata */
.sheet__foot--cover .foot-cluster .foot-meta:first-child .foot-val {
  font-family: var(--serif);
  font-style: italic;
  text-transform: none;
  letter-spacing: 0;
  font-size: 0.9375rem;
  line-height: 1.2;
  color: var(--ink);
}


/* —— TYPOGRAPHY — SHARED PRIMITIVES —— */

.eyebrow {
  font-family: var(--mono);
  font-size: 0.75rem;         /* ~12px */
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.875rem;
}

.section-title {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 400;
  font-variation-settings: "opsz" 144, "SOFT" 100;
  font-size: clamp(2.25rem, 5.5vw, 3.5rem);
  line-height: 1.0;
  letter-spacing: -0.022em;
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.section-title .accent { color: var(--accent); }

.section-header {
  margin-bottom: 1.75rem;
}

.accent { color: var(--accent); }


/* —— PROSE —— */

.prose {
  font-family: var(--serif);
  font-weight: 400;
  font-variation-settings: "opsz" 16;
  font-size: clamp(0.95rem, 1.1vw, 1.0625rem);  /* ~15-17px */
  line-height: 1.65;
  color: var(--ink);
  max-width: 42rem;
}

.prose p { margin-bottom: 0.85rem; }

.prose p.lead {
  font-style: italic;
  font-size: clamp(1.0625rem, 1.3vw, 1.25rem);  /* ~17-20px */
  line-height: 1.5;
  margin-bottom: 1.25rem;
}

.prose em { font-style: italic; }

.prose-intro {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(0.95rem, 1.1vw, 1.0625rem);
  line-height: 1.6;
  color: var(--ink);
  max-width: 42rem;
  margin-bottom: 1.25rem;
}


/* —— COVER —— */

.sheet--cover .sheet__body {
  justify-content: center;
}

.cover-composition {
  display: grid;
  grid-template-columns: auto 1fr;
  column-gap: 2.5rem;
  align-items: center;
  width: 100%;
  max-width: 6.5in;
}

.cover-mark {
  grid-column: 1;
  grid-row: 1 / -1;
  align-self: center;
  font-family: var(--mark);
  font-style: italic;
  font-weight: 400;
  font-variation-settings: "opsz" 144, "SOFT" 100;
  font-size: clamp(8rem, 18vw, 14rem);
  line-height: 0.85;
  letter-spacing: -0.04em;
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.cover-mark sup {
  font-size: 0.55em;
  color: var(--accent);
  margin-left: 0.05em;
  vertical-align: super;
}

.cover-stack {
  grid-column: 2;
  grid-row: 1;
  align-self: end;
  display: flex;
  flex-direction: column;
  max-width: 22rem;
}

.cover-title {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 400;
  font-variation-settings: "opsz" 144, "SOFT" 100;
  font-size: clamp(2.75rem, 5.5vw, 3.75rem);
  line-height: 0.95;
  letter-spacing: -0.025em;
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.cover-sub {
  font-family: var(--serif);
  font-weight: 400;
  font-style: normal;
  font-variation-settings: "opsz" 16;
  font-size: clamp(1rem, 1.3vw, 1.1875rem);
  line-height: 1.0;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
  margin-top: 0.5rem;
}

.cover-copy {
  grid-column: 2;
  grid-row: 2;
  align-self: start;
  margin-top: 1rem;
  font-family: var(--serif);
  font-weight: 400;
  font-variation-settings: "opsz" 16;
  font-size: clamp(0.875rem, 1vw, 1rem);
  line-height: 1.5;
  color: var(--ink);
  max-width: 22rem;
}


/* —— CHOICE LIST —— */

.choice-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.choice {
  display: flex;
  gap: 1.5rem;
  padding: 0.875rem 0;
  border-top: 1px solid var(--rule-soft);
}
.choice:last-child { border-bottom: 1px solid var(--rule-soft); }

.choice-num {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.22em;
  color: var(--accent);
  flex-shrink: 0;
  width: 2rem;
  padding-top: 0.25rem;
}

.choice-head {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 400;
  font-variation-settings: "opsz" 16;
  font-size: clamp(1rem, 1.2vw, 1.125rem);
  line-height: 1.2;
  margin-bottom: 0.25rem;
  color: var(--ink);
}

.choice-body p {
  font-family: var(--serif);
  font-weight: 400;
  font-variation-settings: "opsz" 16;
  font-size: clamp(0.875rem, 1vw, 0.9375rem);
  line-height: 1.55;
  color: var(--ink);
}

.choice-body em { font-style: italic; }


/* —— MODES —— */

.modes {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.mode {
  border-top: 1px solid var(--rule);
  padding: 1rem 0 0.75rem;
}
.mode:last-child {
  border-bottom: 1px solid var(--rule);
  padding-bottom: 1rem;
}

.mode-meta {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  flex-wrap: wrap;
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 0.5rem;
}

.mode-name {
  color: var(--ink);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
}

.mode-display {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 400;
  font-variation-settings: "opsz" 144, "SOFT" 100;
  font-size: clamp(1.25rem, 2vw, 1.625rem);
  line-height: 1.0;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.mode-rows {
  display: flex;
  flex-direction: column;
}

.mode-row {
  display: flex;
  gap: 1.125rem;
  align-items: baseline;
  border-top: 1px dotted var(--rule);
  padding: 0.375rem 0;
}

.mode-row dt {
  font-family: var(--mono);
  font-size: 0.625rem;
  color: var(--ink-soft);
  width: 6.5rem;
  flex-shrink: 0;
  letter-spacing: 0.10em;
  text-transform: uppercase;
}

.mode-row dd {
  font-family: var(--serif);
  font-weight: 400;
  font-variation-settings: "opsz" 16;
  font-size: clamp(0.875rem, 1vw, 0.9375rem);
  line-height: 1.5;
  color: var(--ink);
}


/* —— MODULES PALETTE —— */

.palette {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.875rem;
  margin-top: 0.5rem;
}

.swatch {
  border: 1px solid var(--rule);
  display: flex;
  flex-direction: column;
  background: var(--paper);
}

.chip {
  height: clamp(4rem, 9vw, 6.5rem);
  border-bottom: 1px solid var(--rule);
}

.swatch__chip--paper {
  background: var(--paper) !important;
  background-image:
    linear-gradient(45deg, var(--rule-soft) 25%, transparent 25%),
    linear-gradient(-45deg, var(--rule-soft) 25%, transparent 25%);
  background-size: 8px 8px;
  background-position: 0 0, 4px 4px;
  opacity: 0.6;
}

.swatch .info {
  padding: 0.625rem 0.75rem 0.75rem;
  font-family: var(--mono);
  font-size: 0.625rem;
  line-height: 1.5;
}

.swatch .name {
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--ink);
  margin-bottom: 4px;
  font-weight: 500;
}

.swatch .role {
  text-transform: uppercase;
  color: var(--accent);
  letter-spacing: 0.04em;
  font-size: 0.5625rem;
}

.swatch .gloss {
  color: var(--ink-soft);
  font-size: 0.6875rem;
  letter-spacing: 0.02em;
  margin-top: 0.5rem;
  line-height: 1.45;
  font-family: var(--serif);
  font-weight: 400;
  font-variation-settings: "opsz" 16;
  text-transform: none;
}


/* —— TIERS —— */

.tiers {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border-top: 1px solid var(--rule);
  margin-top: 0.5rem;
}

.tier {
  padding: 1.25rem 1.25rem 1.25rem 0;
  border-right: 1px solid var(--rule);
}

.tier:last-child {
  padding-right: 0;
  padding-left: 1.25rem;
  border-right: none;
}

.tier-tag {
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 0.5rem;
}

.tier-head {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 400;
  font-variation-settings: "opsz" 144, "SOFT" 100;
  font-size: clamp(1.125rem, 1.6vw, 1.4375rem);
  line-height: 1.15;
  margin-bottom: 0.625rem;
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.tier-head em { font-style: normal; color: var(--accent); }

.tier p {
  font-family: var(--serif);
  font-weight: 400;
  font-variation-settings: "opsz" 16;
  font-size: clamp(0.875rem, 1vw, 0.9375rem);
  line-height: 1.55;
  margin-bottom: 0.625rem;
}

.tier-list {
  list-style: none;
  padding: 0;
  margin-top: 0.625rem;
  border-top: 1px solid var(--rule-soft);
}

.tier-list li {
  font-family: var(--mono);
  font-size: 0.6875rem;
  color: var(--ink-soft);
  padding: 0.3125rem 0;
  border-bottom: 1px solid var(--rule-soft);
}

.tier-list li::before {
  content: '→  ';
  color: var(--accent);
}


/* —— CARD MOCKUPS —— */

.cards {
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin: 1.5rem 0 1rem;
  flex-wrap: wrap;
}

.card-shell {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  align-items: center;
}

.card {
  width: clamp(15rem, 22vw, 17.5rem);
  aspect-ratio: 3.5 / 2;
  position: relative;
  overflow: hidden;
  padding: 0.875rem 1rem;
  border-radius: 4px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow:
    0 0.5pt 1pt rgba(0, 0, 0, 0.12),
    0 4pt 12pt rgba(0, 0, 0, 0.15);
}

.card--front {
  background: var(--paper-deep);
  color: var(--ink);
}

.card--back {
  background: var(--ink);
  color: var(--paper);
}

.card-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.card-meta {
  font-family: var(--mono);
  font-size: 0.4375rem;       /* ~7px */
  letter-spacing: 0.22em;
  text-transform: uppercase;
  line-height: 1.6;
}

.card--front .card-meta { color: var(--ink-soft); }
.card--back  .card-meta { color: rgba(242, 237, 227, 0.6); }

.card-meta--right { text-align: right; }
.card-meta-indent { margin-left: 9px; display: inline-block; }
.card-meta-faint { opacity: 0.65; }

.card-meta .dot {
  display: inline-block;
  width: 4px;
  height: 4px;
  background: var(--accent);
  border-radius: 50%;
  margin-right: 5px;
  vertical-align: middle;
}

.card-mark {
  font-family: var(--mark);
  font-style: italic;
  font-weight: 400;
  font-variation-settings: "opsz" 144, "SOFT" 100;
  font-size: 4rem;
  line-height: 1;
  letter-spacing: -0.04em;
  text-align: center;
  margin-top: -0.25rem;
}

.card-mark sup {
  font-size: 0.55em;
  color: var(--accent);
  margin-left: 0.05em;
  vertical-align: super;
}

.card-bottom {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  border-top: 1px solid var(--rule);
  padding-top: 0.375rem;
}

.card--back .card-bottom {
  border-top-color: rgba(242, 237, 227, 0.18);
}

.card-wordmark {
  font-family: var(--mono);
  font-size: 0.4375rem;
  letter-spacing: 0.42em;
  text-transform: uppercase;
  font-weight: 700;
}

.card-cta {
  font-family: var(--mono);
  font-size: 0.4375rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.card-glyph {
  font-family: var(--mark);
  font-style: italic;
  font-variation-settings: "opsz" 144, "SOFT" 100;
  font-size: 0.875rem;
  line-height: 1;
  letter-spacing: -0.04em;
}

.card-glyph sup {
  font-size: 0.55em;
  color: var(--accent);
  margin-left: 0.05em;
  vertical-align: super;
}

.card-name-block {
  margin-top: 0.25rem;
}

.card-name {
  font-family: var(--serif);
  font-weight: 400;
  font-size: 1.0625rem;
  line-height: 1.05;
  letter-spacing: -0.018em;
  margin-bottom: 0.1875rem;
}

.card-name em { font-style: italic; }

.card-title {
  font-family: var(--mono);
  font-size: 0.4375rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: rgba(242, 237, 227, 0.7);
}

.card-sep {
  color: var(--accent);
  margin: 0 5px;
}

.card-info {
  display: grid;
  grid-template-columns: 1fr 1fr;
  font-family: var(--mono);
  font-size: 0.4375rem;
  line-height: 1.65;
}

.card-info-col--right { text-align: right; }

.card-info-label {
  display: block;
  font-size: 0.375rem;        /* ~6px */
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: rgba(242, 237, 227, 0.6);
  margin-bottom: 1px;
  margin-top: 4px;
}
.card-info-label:first-child { margin-top: 0; }

.card-info-val { color: var(--paper); }

.card-label {
  font-family: var(--mono);
  font-size: 0.625rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--ink-soft);
}


/* —— CONTACT SPEC BLOCK —— */

.contact-spec {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  margin-top: 1.5rem;
}

.contact-cell {
  padding: 0.875rem 1rem 0.875rem 0;
  border-right: 1px solid var(--rule-soft);
}
.contact-cell:first-child { padding-left: 0; }
.contact-cell:last-child { border-right: none; }

.contact-lbl {
  font-family: var(--mono);
  font-size: 0.625rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.375rem;
}

.contact-val {
  font-family: var(--serif);
  font-weight: 400;
  font-variation-settings: "opsz" 16;
  font-size: 1rem;
  line-height: 1.4;
  color: var(--ink);
}

.contact-val em { font-style: italic; }

.contact-sub {
  font-family: var(--mono);
  font-size: 0.6875rem;
  color: var(--ink-soft);
  display: block;
  margin-top: 2px;
  letter-spacing: 0.04em;
}


/* —— NEXT LINE —— */

.next-line {
  font-family: var(--mono);
  font-size: 0.75rem;
  line-height: 1.7;
  color: var(--ink-soft);
  margin-top: 1.25rem;
}

.next-lbl {
  color: var(--accent);
  font-weight: 400;
  margin-right: 0.5rem;
}

.next-link {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--rule);
  transition: border-color 0.15s ease, color 0.15s ease;
}

.next-link:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}


/* ============================================================
   RESPONSIVE BREAKPOINTS
   ============================================================ */


/* —— TABLET / NARROW DESKTOP (≤ 900px) —— */

@media (max-width: 900px) {
  :root {
    --sheet-pad-x: 2.5rem;
    --sheet-pad-y: 2rem;
    --page-pad: 1rem;
  }

  .palette {
    grid-template-columns: repeat(2, 1fr);
  }

  .cover-composition {
    gap: 1.5rem;
  }

  .cover-stack {
    max-width: 18rem;
  }
}


/* —— PHONE (≤ 600px) —— */

@media (max-width: 600px) {
  :root {
    --sheet-pad-x: 1.5rem;
    --sheet-pad-y: 1.5rem;
    --page-pad: 0.5rem;
  }

  body {
    font-size: 15px;
  }

  /* Sheet head/foot — stack info if needed, smaller type */
  .sheet__head, .sheet__foot {
    font-size: 0.5625rem;
    letter-spacing: 0.18em;
    gap: 0.5rem;
  }

  /* Hide left-side "Practice — v1" on phone — section indicator is what's useful */
  .sheet__head .head-left {
    display: none;
  }

  .sheet__head .head-right, .sheet__foot .foot-right {
    text-align: right;
  }

  .sheet__body {
    padding: 1.5rem 0;
  }

  .foot-cluster {
    gap: 1rem;
  }


  /* Section headers */
  .section-header {
    margin-bottom: 1.25rem;
  }

  .eyebrow {
    font-size: 0.6875rem;
    letter-spacing: 0.22em;
    margin-bottom: 0.625rem;
  }

  .section-title {
    font-size: clamp(1.875rem, 9vw, 2.5rem);
  }


  /* Cover — mark stays left, title-stack right, copy spans full width below */
  .cover-composition {
    column-gap: 1.5rem;
    row-gap: 0.5rem;
  }

  .cover-mark {
    grid-row: 1;
    font-size: clamp(6.5rem, 26vw, 8.5rem);
    line-height: 0.85;
  }

  .cover-stack {
    max-width: 100%;
  }

  .cover-title {
    font-size: clamp(2.25rem, 10vw, 3rem);
  }

  .cover-copy {
    grid-column: 1 / -1;
    max-width: 100%;
    margin-top: 0.75rem;
    font-size: 0.9375rem;
  }


  /* Cover footer — keep horizontal; stack Prepared+Document on the left, Pages on the right */
  .sheet__foot--cover {
    flex-direction: row;
    align-items: flex-start;
    gap: 1rem;
  }

  .foot-cluster {
    flex-direction: column;
    gap: 0.875rem;
    flex: 1;
    min-width: 0;
  }


  /* Choices — tighter, no separate num column */
  .choice {
    flex-direction: column;
    gap: 0.25rem;
    padding: 0.75rem 0;
  }

  .choice-num {
    width: auto;
    padding-top: 0;
    margin-bottom: 0.125rem;
  }

  .choice-head {
    font-size: 1.0625rem;
  }


  /* Modes — stack rows; meta wraps */
  .mode-meta {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.25rem;
    margin-bottom: 0.625rem;
  }

  .mode-display {
    font-size: 1.25rem;
  }

  .mode-row {
    flex-direction: column;
    gap: 0.25rem;
    padding: 0.5rem 0;
  }

  .mode-row dt {
    width: auto;
    font-size: 0.5625rem;
    letter-spacing: 0.16em;
    color: var(--accent);
  }


  /* Modules — single column on phone */
  .palette {
    grid-template-columns: 1fr;
    gap: 0.625rem;
  }

  .chip {
    height: 3rem;
  }


  /* Tiers — stack vertically */
  .tiers {
    grid-template-columns: 1fr;
  }

  .tier {
    padding: 1rem 0;
    border-right: none;
    border-bottom: 1px solid var(--rule);
  }

  .tier:last-child {
    padding-left: 0;
    padding-bottom: 0;
    border-bottom: none;
  }

  .tier-head {
    font-size: 1.25rem;
  }


  /* Cards — stack vertically and grow to readable size */
  .cards {
    flex-direction: column;
    align-items: center;
    gap: 1.25rem;
  }

  .card {
    width: min(20rem, 100%);
  }


  /* Contact spec — stack into single column */
  .contact-spec {
    grid-template-columns: 1fr;
  }

  .contact-cell {
    padding: 0.75rem 0;
    border-right: none;
    border-bottom: 1px solid var(--rule-soft);
  }

  .contact-cell:last-child { border-bottom: none; }


  /* Next line — wrap-friendly */
  .next-line {
    font-size: 0.6875rem;
    line-height: 1.65;
  }
}


/* —— SHORT VIEWPORTS (laptops ≤ 760px tall) —— */

@media (max-height: 760px) and (min-width: 600px) {
  :root {
    --sheet-pad-y: 2rem;
  }

  .sheet__body {
    padding: 1.5rem 0;
  }

  .section-header {
    margin-bottom: 1.25rem;
  }

  .section-title {
    font-size: clamp(2rem, 4.5vw, 2.75rem);
  }

  .cover-mark {
    font-size: clamp(7rem, 14vw, 10rem);
  }

  .choice { padding: 0.625rem 0; }
  .mode { padding-top: 0.875rem; }
}


/* —— REDUCED MOTION —— */

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  * {
    transition: none !important;
  }
}


/* —— HIGH-PIXEL-DENSITY SHEET SHADOW REFINEMENT —— */

@media (min-resolution: 2dppx) {
  .sheet {
    box-shadow:
      0 0.5px 1px rgba(0, 0, 0, 0.18),
      0 16px 32px rgba(0, 0, 0, 0.32);
  }
}