/* Ocean Energy Atlas tokens. Source of truth: /DESIGN.md (sections 2 to 4).
   Palette from the ChatGPT anchor; text-safe variants derived so every text
   pairing passes WCAG AA (ratios in DESIGN.md section 2). */

@font-face { font-family: "IBM Plex Sans"; src: url("fonts/IBMPlexSans-Regular.woff2") format("woff2"); font-weight: 400; font-style: normal; font-display: swap; }
@font-face { font-family: "IBM Plex Sans"; src: url("fonts/IBMPlexSans-Italic.woff2") format("woff2"); font-weight: 400; font-style: italic; font-display: swap; }
@font-face { font-family: "IBM Plex Sans"; src: url("fonts/IBMPlexSans-Medium.woff2") format("woff2"); font-weight: 500; font-style: normal; font-display: swap; }
@font-face { font-family: "IBM Plex Sans"; src: url("fonts/IBMPlexSans-SemiBold.woff2") format("woff2"); font-weight: 600; font-style: normal; font-display: swap; }
@font-face { font-family: "IBM Plex Mono"; src: url("fonts/IBMPlexMono-Regular.woff2") format("woff2"); font-weight: 400; font-style: normal; font-display: swap; }
@font-face { font-family: "IBM Plex Mono"; src: url("fonts/IBMPlexMono-Medium.woff2") format("woff2"); font-weight: 500; font-style: normal; font-display: swap; }
@font-face { font-family: "IBM Plex Serif"; src: url("fonts/IBMPlexSerif-Regular.woff2") format("woff2"); font-weight: 400; font-style: normal; font-display: swap; }
@font-face { font-family: "IBM Plex Serif"; src: url("fonts/IBMPlexSerif-Italic.woff2") format("woff2"); font-weight: 400; font-style: italic; font-display: swap; }
@font-face { font-family: "IBM Plex Serif"; src: url("fonts/IBMPlexSerif-SemiBold.woff2") format("woff2"); font-weight: 600; font-style: normal; font-display: swap; }

:root, [data-theme="light"] {
  /* Brand */
  --deep-ocean: #0B2F45;   /* primary actions, dark bands, footer, app sidebar */
  --ocean: #2F6B8A;        /* links, selected bar, first data series */
  --sea-mist: #B7D4E6;     /* tints, text on dark bands */
  --mist-tint: #E4EFF6;    /* selected row / nav item */

  /* Neutrals */
  --paper: #F8FAFC;
  --surface: #FFFFFF;
  --sunken: #F1F5F9;
  --ink: #0F1720;
  --ink-2: #475569;        /* Slate: secondary text */
  --ink-3: #64748B;        /* captions, axis labels; 4.5:1 on Paper */
  --on-dark: #F8FAFC;
  --on-dark-2: #B7D4E6;
  --rule: #CBD5E1;         /* Stone: card borders, table rules */
  --rule-soft: #E2E8F0;
  --rule-strong: #94A3B8;

  /* Traced number (signal) */
  --signal: #1D5FBF;       /* text; 5.8:1 on Paper */
  --signal-line: #3B82F6;  /* underline, leader line, focus ring */
  --signal-tint: #DBEAFE;
  --focus: var(--signal-line);

  /* Status: colour is never alone; glyph + word + border style carry it */
  --pass: #15803D;  --pass-fill: #16A34A;  --pass-tint: #DCFCE7;
  --warn: #B45309;  --warn-fill: #D97706;  --warn-tint: #FEF3C7;
  --fail: #B91C1C;  --fail-fill: #DC2626;  --fail-tint: #FEE2E2;
  --gap: #475569;   --gap-fill: #94A3B8;   --gap-tint: #F1F5F9;

  /* Data: categorical (graphics only, never text) */
  --cat-1: #2F6B8A; --cat-2: #14B8A6; --cat-3: #3B82F6; --cat-4: #8B5CF6; --cat-5: #EAB308; --cat-6: #0B2F45;
  /* Data: sequential depth ramp, even OKLab lightness, light to deep */
  --depth-1: #DCEAF3; --depth-2: #A4B7C5; --depth-3: #6F8798; --depth-4: #3D596D; --depth-5: #0B2F45;

  --shadow-card: 0 1px 2px rgba(15, 23, 32, .05);
  --shadow-panel: 0 1px 0 var(--rule), 0 12px 32px rgba(11, 47, 69, .14);
}

[data-theme="dark"] {
  --deep-ocean: #B7D4E6; --ocean: #8CC0DE; --sea-mist: #2F6B8A; --mist-tint: #15364C;
  --paper: #0A1620; --surface: #0F1F2B; --sunken: #08121A;
  --ink: #E6EDF3; --ink-2: #A9B6C4; --ink-3: #8B9AAA; --on-dark: #0A1620; --on-dark-2: #2F6B8A;
  --rule: #23384A; --rule-soft: #1A2C3A; --rule-strong: #4A6175;
  --signal: #7FB0F5; --signal-line: #60A5FA; --signal-tint: #12304F;
  --pass: #4ADE80; --pass-fill: #22C55E; --pass-tint: #0F2E1C;
  --warn: #FBBF24; --warn-fill: #F59E0B; --warn-tint: #33260A;
  --fail: #F87171; --fail-fill: #EF4444; --fail-tint: #3A1414;
  --gap: #A9B6C4;  --gap-fill: #64748B; --gap-tint: #15222D;
  --depth-1: #16303F; --depth-2: #2B5068; --depth-3: #4F7C98; --depth-4: #85AECB; --depth-5: #CFE3F0;
  --shadow-card: none;
  --shadow-panel: 0 1px 0 var(--rule), 0 12px 32px rgba(0, 0, 0, .5);
}

:root {
  --font-sans: "IBM Plex Sans", "Helvetica Neue", Arial, sans-serif;
  --font-serif: "IBM Plex Serif", Georgia, serif;
  --font-mono: "IBM Plex Mono", ui-monospace, Menlo, monospace;

  /* Type scale: size / line height */
  --t-display: 600 3rem/1.08 var(--font-sans);    /* 48/52 hero */
  --t-h1: 600 2.25rem/1.15 var(--font-sans);      /* 36/41 */
  --t-h2: 600 1.75rem/1.25 var(--font-sans);      /* 28/35 */
  --t-h3: 600 1.25rem/1.4 var(--font-sans);       /* 20/28 */
  --t-h4: 600 1rem/1.5 var(--font-sans);          /* 16/24 */
  --t-body: 400 1rem/1.5 var(--font-sans);        /* 16/24 */
  --t-small: 400 .875rem/1.43 var(--font-sans);   /* 14/20 */
  --t-caption: 400 .75rem/1.33 var(--font-sans);  /* 12/16 */
  --t-eyebrow: 600 .75rem/1.33 var(--font-sans);  /* 12/16, uppercase, tracked */
  --t-mono: 400 .8125rem/1.54 var(--font-mono);   /* 13/20 */
  --t-prose: 400 1.0625rem/1.65 var(--font-serif);/* 17/28 study prose only */
  --track-eyebrow: .14em;
  --track-display: -.015em;

  /* Space: 4-based */
  --space-1: 4px; --space-2: 8px; --space-3: 12px; --space-4: 16px;
  --space-5: 24px; --space-6: 32px; --space-7: 56px; --space-8: 96px;

  --radius-0: 0; --radius-1: 2px; --radius-2: 4px; --radius-3: 6px;
  --hairline: 1px; --rule-heavy: 2px;
  --measure: 68ch;
  --page-max: 1200px;
  --gutter: clamp(16px, 4vw, 32px);

  --ease: cubic-bezier(.2, 0, 0, 1);
  --dur-1: 120ms; --dur-2: 200ms; --dur-3: 320ms;
}

/* Ocean Energy Atlas components. Values come from oea-tokens.css; rules live in /DESIGN.md section 5.
   Structure from the Claude Design kit, look from the ChatGPT anchor. */

.oea, .oea * { box-sizing: border-box; }
.oea { font: var(--t-body); color: var(--ink); background: var(--paper); -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; }
.oea h1, .oea h2, .oea h3, .oea h4, .oea p { margin: 0; }
.oea a { color: var(--ocean); text-decoration-thickness: 1px; text-underline-offset: 3px; }
.oea :focus-visible { outline: var(--rule-heavy) solid var(--focus); outline-offset: 2px; }
.oea .num, .oea table { font-variant-numeric: lining-nums tabular-nums; }
.oea .u { color: var(--ink-2); }                 /* unit; joined to its number by U+202F */
.oea .mono { font: var(--t-mono); }
.oea .muted { color: var(--ink-2); }
.oea .faint { color: var(--ink-3); }
.oea .prose { font: var(--t-prose); max-width: var(--measure); }

/* Type */
.display { font: var(--t-display); letter-spacing: var(--track-display); color: var(--deep-ocean); text-wrap: balance; }
.h1 { font: var(--t-h1); letter-spacing: var(--track-display); color: var(--deep-ocean); text-wrap: balance; }
.h2 { font: var(--t-h2); color: var(--deep-ocean); text-wrap: balance; }
.h3 { font: var(--t-h3); color: var(--ink); }
.h4 { font: var(--t-h4); color: var(--ink); }
.small { font: var(--t-small); }
.caption { font: var(--t-caption); color: var(--ink-3); }
.eyebrow { font: var(--t-eyebrow); letter-spacing: var(--track-eyebrow); text-transform: uppercase; color: var(--ocean); }

/* Section head: "02  PRODUCTS" + a quiet subline, over a hairline */
.sec-head { display: grid; grid-template-columns: auto 1fr; column-gap: var(--space-4); align-items: baseline; padding-top: var(--space-5); border-top: var(--hairline) solid var(--rule); }
.sec-head .n { font: 500 .75rem/1.33 var(--font-mono); color: var(--ink-3); }
.sec-head .eyebrow { color: var(--deep-ocean); }
.sec-head .sub { grid-column: 2; font: var(--t-caption); letter-spacing: .08em; text-transform: uppercase; color: var(--ink-3); margin-top: 2px; }

/* Wordmark lockups are SVG files (design/logo/lockup); this only sizes them */
.oea-lockup { display: block; height: 32px; width: auto; }
.oea-lockup.lg { height: 48px; }

/* Placeholders: anything that must be supplied before launch */
.ph { display: inline-block; border: 1px dashed var(--rule-strong); color: var(--ink-2); padding: 0 4px; border-radius: var(--radius-1); font-style: normal; }
.ph-box { display: flex; align-items: center; justify-content: center; text-align: center; border: 1px dashed var(--rule-strong); border-radius: var(--radius-2); color: var(--ink-2); font: var(--t-small); padding: var(--space-3); }

/* Inline icons (masks so they take currentColor and never depend on font coverage) */
.i { display: inline-block; width: 1em; height: 1em; flex: none; background: currentColor; -webkit-mask: var(--m) center / contain no-repeat; mask: var(--m) center / contain no-repeat; }
.i-arrow { --m: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M2 8h11M9 4l4 4-4 4' fill='none' stroke='%23000' stroke-width='1.5'/%3E%3C/svg%3E"); }
.i-check { --m: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M3 8.5l3.2 3L13 4.5' fill='none' stroke='%23000' stroke-width='2'/%3E%3C/svg%3E"); }
.i-tri { --m: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M8 2l7 12H1z'/%3E%3C/svg%3E"); }
.i-cross { --m: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M3.5 3.5l9 9M12.5 3.5l-9 9' fill='none' stroke='%23000' stroke-width='2.2'/%3E%3C/svg%3E"); }
.i-gap { --m: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Ccircle cx='8' cy='8' r='5' fill='none' stroke='%23000' stroke-width='1.6'/%3E%3Cpath d='M3 13L13 3' stroke='%23000' stroke-width='1.6'/%3E%3C/svg%3E"); }
.i-lock { --m: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Crect x='3' y='7' width='10' height='7' rx='1'/%3E%3Cpath d='M5 7V5a3 3 0 016 0v2' fill='none' stroke='%23000' stroke-width='1.5'/%3E%3C/svg%3E"); }

/* Buttons: one primary per view */
.btn { font: 500 .9375rem/1.25rem var(--font-sans); padding: 11px 18px; border-radius: var(--radius-2); border: 1px solid var(--deep-ocean); background: var(--deep-ocean); color: var(--on-dark); cursor: pointer; display: inline-flex; gap: var(--space-3); align-items: center; text-decoration: none; transition: background var(--dur-1) var(--ease); }
.btn:hover { background: color-mix(in srgb, var(--deep-ocean) 88%, var(--ocean)); }
.btn.secondary { background: var(--surface); color: var(--deep-ocean); border-color: var(--rule-strong); }
.btn.quiet { background: transparent; color: var(--deep-ocean); border-color: transparent; padding-inline: var(--space-2); }
.btn.approve { background: var(--pass); border-color: var(--pass); color: #fff; }
.btn.sm { font-size: .8125rem; padding: 6px 12px; }
.oea a.btn { color: var(--on-dark); text-decoration: none; }
.oea a.btn.secondary, .oea a.btn.quiet { color: var(--deep-ocean); }
.more { display: inline-flex; gap: var(--space-2); align-items: center; font: 500 .875rem/1.25rem var(--font-sans); color: var(--deep-ocean); text-decoration: none; border-bottom: 1px solid var(--rule-strong); padding-bottom: 1px; }

/* Cards */
.card { background: var(--surface); border: var(--hairline) solid var(--rule); border-radius: var(--radius-3); box-shadow: var(--shadow-card); padding: var(--space-5); }
.card .ico { width: 32px; height: 32px; color: var(--deep-ocean); }
.panel { background: var(--surface); border: var(--hairline) solid var(--rule); border-radius: var(--radius-3); }

/* Bands: dark Deep Ocean sections and footer */
.band { background: var(--deep-ocean); color: var(--on-dark); }
.band .eyebrow, .band .muted { color: var(--on-dark-2); }
.band .display, .band .h1, .band .h2 { color: var(--on-dark); }
.band a { color: var(--on-dark); }
.band .btn { background: var(--on-dark); color: var(--deep-ocean); border-color: var(--on-dark); }

/* Contour texture: quiet line field behind the hero; never behind body text blocks */
.contours { background-color: var(--paper); background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='640' height='320' viewBox='0 0 640 320' fill='none' stroke='%232F6B8A' stroke-opacity='.10'%3E%3Cpath d='M0 40c80-30 160 30 240 0s160-40 240-10 120 30 160 10'/%3E%3Cpath d='M0 80c90-28 170 34 250 4s150-36 230-8 110 26 160 8'/%3E%3Cpath d='M0 122c96-26 176 36 256 8s144-32 224-6 100 22 160 6'/%3E%3Cpath d='M0 166c100-22 180 38 262 12s138-28 218-4 92 18 160 4'/%3E%3Cpath d='M0 212c104-18 186 40 268 16s132-24 212-2 84 14 160 2'/%3E%3Cpath d='M0 260c108-14 190 42 274 20s126-20 206 0 78 10 160 0'/%3E%3Cpath d='M0 306c112-10 196 44 280 24s120-16 200 2 70 6 160-2'/%3E%3C/svg%3E"); background-size: 640px 320px; }

/* Navigation */
.topnav { display: flex; align-items: center; gap: var(--space-6); padding: var(--space-4) 0; }
.topnav nav { display: flex; gap: var(--space-5); margin-left: auto; font: var(--t-small); }
.topnav nav a { color: var(--ink); text-decoration: none; }
@media (max-width: 760px) { .topnav { gap: var(--space-3); justify-content: space-between; } .topnav nav { display: none; } }   /* links move into a menu sheet */
.toc { list-style: none; margin: 0; padding: 0; font: var(--t-small); }
.toc a { display: block; padding: 6px 12px; color: var(--ink); text-decoration: none; border-left: 3px solid transparent; }
.toc a[aria-current] { background: var(--mist-tint); border-left-color: var(--ocean); font-weight: 600; color: var(--deep-ocean); }
.sidenav { background: #0B2F45; color: #F8FAFC; padding: var(--space-4) 0; }   /* app shell stays deep in both themes */
.sidenav a { display: flex; gap: var(--space-3); align-items: center; padding: 10px var(--space-5); color: #F8FAFC; text-decoration: none; font: var(--t-small); }
.sidenav a[aria-current] { background: rgba(183, 212, 230, .14); box-shadow: inset 3px 0 #B7D4E6; }

/* Status chip: glyph + word + border style; readable in greyscale */
.st { display: inline-flex; align-items: center; gap: 5px; font: 600 .75rem/1rem var(--font-sans); padding: 2px 8px 2px 6px; border-radius: var(--radius-1); border: 1px solid currentColor; white-space: nowrap; }
.st::before { content: ""; width: 12px; height: 12px; background: currentColor; -webkit-mask: var(--m) center / contain no-repeat; mask: var(--m) center / contain no-repeat; }
.st.pass { color: var(--pass); background: var(--pass-tint); }
.st.pass::before { --m: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M3 8.5l3.2 3L13 4.5' fill='none' stroke='%23000' stroke-width='2.2'/%3E%3C/svg%3E"); }
.st.warn { color: var(--warn); background: var(--warn-tint); border-style: dashed; }
.st.warn::before { --m: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M8 2l7 12H1z'/%3E%3C/svg%3E"); }
.st.fail { color: var(--fail); background: var(--fail-tint); border-width: 2px; padding: 1px 7px 1px 5px; }
.st.fail::before { --m: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M3.5 3.5l9 9M12.5 3.5l-9 9' fill='none' stroke='%23000' stroke-width='2.4'/%3E%3C/svg%3E"); }
.st.gap { color: var(--gap); background: var(--gap-tint); border-style: dotted; }
.st.gap::before { --m: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Ccircle cx='8' cy='8' r='5' fill='none' stroke='%23000' stroke-width='1.8'/%3E%3Cpath d='M3 13L13 3' stroke='%23000' stroke-width='1.8'/%3E%3C/svg%3E"); }
.oea-hatch { background-color: var(--gap-tint); background-image: repeating-linear-gradient(135deg, transparent 0 5px, var(--gap-fill) 5px 6px); }

/* Review state of one output */
.rv { display: inline-flex; align-items: center; gap: 6px; font: var(--t-caption); color: var(--ink-2); white-space: nowrap; }
.rv i { width: 10px; height: 10px; border: 1.5px solid var(--ink-3); border-radius: 50%; flex: none; }
.rv.approved i { background: var(--pass-fill); border-color: var(--pass-fill); }
.rv.review i { background: linear-gradient(90deg, var(--warn-fill) 50%, transparent 50%); border-color: var(--warn-fill); }  /* half ring: differs from Approved in greyscale */
.rv.flagged i { border: none; border-radius: 0; width: 0; height: 0; border-inline: 6px solid transparent; border-bottom: 11px solid var(--fail-fill); }

/* Tables: units in their own column, numbers right-aligned */
.tbl { border-collapse: collapse; width: 100%; font: var(--t-small); background: var(--surface); }
.tbl th { font-weight: 600; font-size: .75rem; line-height: 1rem; text-align: left; background: var(--sunken); color: var(--ink); padding: 8px 12px; border-bottom: var(--hairline) solid var(--rule-strong); vertical-align: bottom; }
.tbl td { padding: 7px 12px; border-bottom: var(--hairline) solid var(--rule-soft); vertical-align: top; }
.tbl .r { text-align: right; }
.tbl td.u, .tbl th.u { color: var(--ink-2); padding-left: 2px; width: 1%; white-space: nowrap; }
.tbl tr:last-child td { border-bottom: 0; }

/* Traced number: the signature element. Every figure in a study is one of these. */
.tn { color: var(--signal); background: var(--signal-tint); text-decoration: none; border: 0; border-bottom: 1.5px dotted var(--signal-line); padding: 0 3px; border-radius: var(--radius-1); white-space: nowrap; font: inherit; cursor: pointer; }
.tn sup { font: 500 .5625rem/1 var(--font-mono); color: var(--signal); margin-left: 2px; vertical-align: .45em; }
.tn[aria-expanded="true"] { border-bottom-style: solid; outline: 1px solid var(--signal-line); }
.leader { stroke: var(--signal-line); stroke-width: 1; stroke-dasharray: 3 3; fill: none; }

/* Source line under every figure and table */
.srcline { font: 400 .75rem/1.5 var(--font-mono); color: var(--ink-2); display: flex; flex-wrap: wrap; gap: 0 12px; }
.srcline b { font-weight: 500; color: var(--ink); }

/* Provenance panel: fixed field order (DESIGN.md 5.4) */
.prov { background: var(--surface); border: var(--hairline) solid var(--rule); border-top: 3px solid var(--signal-line); border-radius: var(--radius-3); box-shadow: var(--shadow-panel); font: var(--t-small); }
.prov header { display: flex; justify-content: space-between; align-items: baseline; padding: 12px 16px 10px; border-bottom: var(--hairline) solid var(--rule-soft); gap: 12px; }
.prov header .v { font: 600 1.25rem/1.4 var(--font-sans); color: var(--signal); }
.prov dl { margin: 0; padding: 4px 16px 12px; display: grid; grid-template-columns: 104px 1fr; column-gap: 12px; }
.prov dt { font: var(--t-caption); color: var(--ink-3); padding-top: 9px; }
.prov dd { margin: 0; padding-top: 7px; overflow-wrap: anywhere; }
.prov dd.mono { font: var(--t-mono); }
.prov footer { border-top: var(--hairline) solid var(--rule-soft); padding: 10px 16px 12px; font: var(--t-caption); color: var(--ink-2); }

/* Signature rule and sign-off lock */
.sig { border-top: var(--rule-heavy) solid var(--ink); padding-top: var(--space-2); font: var(--t-small); max-width: 320px; }
.locked { display: flex; gap: var(--space-3); align-items: flex-start; padding: 10px 14px; border: 1px solid var(--rule-strong); border-radius: var(--radius-2); background: var(--sunken); font: var(--t-small); color: var(--ink-2); }
.locked::before { content: ""; width: 16px; height: 16px; margin-top: 2px; flex: none; background: var(--ink-2); -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Crect x='3' y='7' width='10' height='7' rx='1'/%3E%3Cpath d='M5 7V5a3 3 0 016 0v2' fill='none' stroke='%23000' stroke-width='1.5'/%3E%3C/svg%3E") center / contain no-repeat; mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Crect x='3' y='7' width='10' height='7' rx='1'/%3E%3Cpath d='M5 7V5a3 3 0 016 0v2' fill='none' stroke='%23000' stroke-width='1.5'/%3E%3C/svg%3E") center / contain no-repeat; }
.locked b { color: var(--ink); }

/* Banners */
.banner { display: flex; gap: 12px; align-items: flex-start; padding: 10px 14px; border: 1px solid currentColor; border-radius: var(--radius-2); font: var(--t-small); }
.banner.fail { color: var(--fail); background: var(--fail-tint); border-width: 2px; }
.banner.warn { color: var(--warn); background: var(--warn-tint); border-style: dashed; }
.banner.info { color: var(--ocean); background: var(--mist-tint); border-color: var(--sea-mist); }
.banner .t { color: var(--ink); }

/* Gap list: what the study does not have */
.gaps { list-style: none; margin: 0; padding: 0; }
.gaps li { display: grid; grid-template-columns: 20px 1fr; gap: 8px; padding: 7px 0; border-bottom: var(--hairline) solid var(--rule-soft); font: var(--t-small); }
.gaps li::before { content: ""; width: 14px; height: 14px; margin-top: 3px; background: var(--gap); -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Ccircle cx='8' cy='8' r='5' fill='none' stroke='%23000' stroke-width='1.8'/%3E%3Cpath d='M3 13L13 3' stroke='%23000' stroke-width='1.8'/%3E%3C/svg%3E") center / contain no-repeat; mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Ccircle cx='8' cy='8' r='5' fill='none' stroke='%23000' stroke-width='1.8'/%3E%3Cpath d='M3 13L13 3' stroke='%23000' stroke-width='1.8'/%3E%3C/svg%3E") center / contain no-repeat; }
.gaps li:last-child { border-bottom: 0; }

/* Method steps */
.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: var(--space-5); counter-reset: s; }
.steps li { counter-increment: s; display: grid; grid-template-columns: 32px 1fr; align-content: start; column-gap: var(--space-3); font: var(--t-small); color: var(--ink-2); }
.steps li::before { content: counter(s); grid-row: span 2; width: 28px; height: 28px; border-radius: 50%; background: var(--deep-ocean); color: var(--on-dark); font: 600 .8125rem/28px var(--font-sans); text-align: center; }
.steps li b { color: var(--ink); font-weight: 600; }

/* Inputs */
.field { display: grid; gap: 6px; }
.field > span { font: 600 .8125rem/1.125rem var(--font-sans); }
.inp { font: var(--t-small); padding: 9px 12px; border: 1px solid var(--rule-strong); border-radius: var(--radius-2); background: var(--surface); color: var(--ink); width: 100%; font-variant-numeric: tabular-nums; }
.seg { display: inline-flex; border: 1px solid var(--rule-strong); border-radius: var(--radius-2); overflow: hidden; justify-self: start; }
.seg label { padding: 7px 12px; font: var(--t-small); cursor: pointer; border-right: 1px solid var(--rule-strong); }
.seg label:last-child { border-right: 0; }
.seg input { position: absolute; opacity: 0; pointer-events: none; }
.seg label:has(input:checked) { background: var(--deep-ocean); color: var(--on-dark); font-weight: 600; }
.seg label:has(input:focus-visible) { outline: 2px solid var(--focus); outline-offset: -2px; }

/* Black-and-white proof (status must survive it) */
.bw { filter: grayscale(1); }

@media (prefers-reduced-motion: reduce) { .oea * { transition: none !important; animation: none !important; } }

/* Marketing site layout. Tokens and components come from design/system (DESIGN.md);
   this file only lays out pages. Light theme only: the dark theme belongs to the app. */

html { scroll-behavior: smooth; scroll-padding-top: 16px; }
body { margin: 0; min-height: 100vh; display: flex; flex-direction: column; }
main { flex: 1; }
img { max-width: 100%; height: auto; }
.wrap { max-width: var(--page-max); margin: 0 auto; padding: 0 var(--gutter); }
.skip { position: absolute; left: -9999px; top: 8px; z-index: 20; background: var(--surface); padding: 8px 12px; }
.skip:focus { left: 8px; }
.vh { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* Header */
.site-head { position: relative; z-index: 3; }
.site-head .topnav { gap: var(--space-5); }
.site-head .topnav nav a[aria-current="page"] { color: var(--deep-ocean); font-weight: 600; box-shadow: inset 0 -2px var(--ocean); }
.site-head .topnav nav a:hover { color: var(--ocean); }
.site-head .home { display: inline-flex; }
.menu { display: none; position: relative; }
.menu summary { list-style: none; cursor: pointer; display: inline-flex; align-items: center; gap: 6px; font: 500 .875rem/1.25rem var(--font-sans); color: var(--deep-ocean); padding: 6px 10px; border: 1px solid var(--rule-strong); border-radius: var(--radius-2); background: var(--surface); }
.menu summary::-webkit-details-marker { display: none; }
.menu ul { list-style: none; margin: 0; padding: 6px 0; position: absolute; right: 0; top: calc(100% + 6px); min-width: 220px; background: var(--surface); border: 1px solid var(--rule); border-radius: var(--radius-3); box-shadow: var(--shadow-panel); }
.menu li a { display: block; padding: 10px 16px; color: var(--ink); text-decoration: none; font: var(--t-small); }
.menu li a[aria-current="page"] { font-weight: 600; color: var(--deep-ocean); background: var(--mist-tint); }
@media (max-width: 760px) {
  .menu { display: block; }
  .site-head .topnav > .btn { display: none; }
}

/* Sections */
.sec { padding-block: var(--space-8); }
.sec.tight { padding-block: var(--space-7); }
.sec + .sec { padding-top: 0; }
.sec-intro { display: grid; gap: var(--space-3); max-width: 760px; margin-top: var(--space-5); }
.sec-intro p { color: var(--ink-2); font-size: 1.0625rem; line-height: 1.6; max-width: 62ch; }
.lead { color: var(--ink-2); font-size: 1.125rem; line-height: 1.6; max-width: 60ch; }
.row { display: flex; gap: var(--space-3); flex-wrap: wrap; align-items: center; }
.grid { display: grid; gap: var(--space-5); }
.g2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.g3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.split { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 6fr); gap: var(--space-7); align-items: start; }
.split.even { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); align-items: center; }
@media (max-width: 960px) { .g3 { grid-template-columns: 1fr; } .split, .split.even { grid-template-columns: 1fr; gap: var(--space-6); } }
@media (max-width: 680px) { .g2 { grid-template-columns: 1fr; } .sec { padding-block: var(--space-7); } }
p + .checks, p + .chips, .lead + .caption, .lead + .muted { margin-top: var(--space-4); }
.oea .mt-3 { margin-top: var(--space-3); } .oea .mt-4 { margin-top: var(--space-4); } .oea .mt-5 { margin-top: var(--space-5); } .oea .mt-6 { margin-top: var(--space-6); }
.card { padding: var(--space-5); }
.card.grid { gap: var(--space-3); align-content: start; }
.card .more { margin-top: auto; }
.card.stack { display: flex; flex-direction: column; gap: var(--space-3); }

/* Hero (home) */
.hero { position: relative; overflow: hidden; background: var(--deep-ocean); isolation: isolate; }
.hero .bg { position: absolute; inset: 0; z-index: -2; }
.hero .bg img { width: 100%; height: 100%; object-fit: cover; object-position: 70% 50%; display: block; }
.hero::before { content: ""; position: absolute; inset: 0; z-index: -1; background: linear-gradient(90deg, var(--paper) 0%, rgba(248, 250, 252, .97) 34%, rgba(248, 250, 252, .78) 52%, rgba(248, 250, 252, 0) 72%); }
.hero-in { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: var(--space-6); align-items: end; padding: var(--space-7) 0 var(--space-8); }
.hero h1 { margin-top: var(--space-3); max-width: 15ch; font-size: clamp(2.25rem, 1.4rem + 3vw, 3.5rem); }
.hero .lead { margin: var(--space-5) 0 var(--space-6); }
.proof { justify-self: end; width: min(100%, 340px); }
.proof .prov { box-shadow: var(--shadow-panel); }
.proof > .caption { margin-top: var(--space-2); color: var(--on-dark); text-shadow: 0 1px 2px rgba(0, 0, 0, .4); }
.proof > .caption a { color: var(--on-dark); text-decoration-color: currentColor; }
@media (max-width: 960px) {
  .hero::before { background: linear-gradient(180deg, rgba(248, 250, 252, .98) 0%, rgba(248, 250, 252, .94) 55%, rgba(248, 250, 252, .35) 100%); }
  .hero-in { grid-template-columns: 1fr; padding-bottom: var(--space-7); }
  .proof { justify-self: start; }
  .proof > .caption { color: var(--ink-2); text-shadow: none; }
  .proof > .caption a { color: var(--ocean); }
}

/* Page head (inner pages) */
.page-head { position: relative; overflow: hidden; background: var(--deep-ocean); color: var(--on-dark); isolation: isolate; }
.page-head .bg { position: absolute; inset: 0; z-index: -2; }
.page-head .bg img { width: 100%; height: 100%; object-fit: cover; display: block; }
.page-head::before { content: ""; position: absolute; inset: 0; z-index: -1; background: linear-gradient(90deg, rgba(11, 47, 69, .94) 0%, rgba(11, 47, 69, .82) 50%, rgba(11, 47, 69, .45) 100%); }
.page-head .site-head .topnav nav a { color: var(--on-dark); }
.page-head .site-head .topnav nav a[aria-current="page"] { color: var(--on-dark); box-shadow: inset 0 -2px var(--sea-mist); }
.page-head .site-head .topnav nav a:hover { color: var(--sea-mist); }
.page-head .site-head .btn { background: var(--on-dark); color: var(--deep-ocean); border-color: var(--on-dark); }
.page-head-in { padding: var(--space-7) 0 var(--space-8); max-width: 820px; }
.page-head .eyebrow { color: var(--sea-mist); }
.page-head h1 { color: var(--on-dark); margin-top: var(--space-3); }
.page-head p { color: #DCE8F0; font-size: 1.125rem; line-height: 1.6; margin-top: var(--space-4); max-width: 62ch; }
.page-head.plain { background: var(--paper); color: var(--ink); }
.page-head.plain::before { display: none; }
.page-head.plain .page-head-in { padding-bottom: var(--space-4); }
.page-head.plain h1 { color: var(--deep-ocean); }
.page-head.plain p { color: var(--ink-2); }
.page-head.plain .eyebrow { color: var(--ocean); }
.page-head.plain .site-head .topnav nav a { color: var(--ink); }
.page-head.plain .site-head .btn { background: var(--deep-ocean); color: var(--on-dark); border-color: var(--deep-ocean); }

/* Form */
.enq { display: grid; gap: var(--space-4); }
.enq .two { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-3); }
.enq .four { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: var(--space-3); }
@media (max-width: 520px) { .enq .four { grid-template-columns: 1fr 1fr; } }
.enq .inp { width: 100%; min-width: 0; }
.enq select.inp { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M4 6l4 4 4-4' fill='none' stroke='%23475569' stroke-width='1.6'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 10px center; background-size: 14px; padding-right: 32px; }
.enq textarea.inp { min-height: 96px; resize: vertical; }
.enq .hint { font: var(--t-caption); color: var(--ink-3); }
.enq .err { font: var(--t-caption); color: var(--fail); display: none; }
.enq .field.bad .inp { border-color: var(--fail); border-width: 2px; padding: 8px 11px; }
.enq .field.bad .err { display: block; }
.enq fieldset { border: 0; margin: 0; padding: 0; min-width: 0; display: grid; gap: 6px; }
.enq legend { font: 600 .8125rem/1.125rem var(--font-sans); padding: 0; margin-bottom: 6px; }
.enq .opt { font-weight: 400; color: var(--ink-3); }
.enq .when-box { display: none; }
.enq:has(input[name="site_kind"][value="box"]:checked) .when-box { display: grid; }
.enq:has(input[name="site_kind"][value="box"]:checked) .when-point { display: none; }
.enq .when-file { display: none; }
.enq:has(input[name="site_kind"][value="file"]:checked) .when-file { display: grid; gap: 6px; }
.enq:has(input[name="site_kind"][value="file"]:checked) :is(.when-point, .when-coords) { display: none; }
.enq .hp { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }
.enq .note { font: var(--t-caption); color: var(--ink-3); }
.enq .btn { justify-self: start; }
.enq .status { display: none; }
.enq .status.on { display: flex; }
.enq[aria-busy="true"] .btn { opacity: .6; pointer-events: none; }
.sent { display: grid; gap: var(--space-3); }
.sent .h3 { color: var(--pass); display: flex; gap: 8px; align-items: center; }
.form-card { padding: var(--space-6); }
@media (max-width: 520px) { .form-card { padding: var(--space-5) var(--space-4); } }

/* Method tiles */
.tiles { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1px; background: var(--rule); border: 1px solid var(--rule); border-radius: var(--radius-3); overflow: hidden; }
.tiles > div { background: var(--surface); padding: var(--space-5); display: grid; gap: var(--space-2); align-content: start; }
.tiles .ico { width: 28px; height: 28px; color: var(--ocean); margin-bottom: var(--space-2); }
.tiles p { font: var(--t-small); color: var(--ink-2); }
@media (max-width: 960px) { .tiles { grid-template-columns: 1fr; } }
@media (max-width: 600px) { .tiles { grid-template-columns: 1fr; } }

/* Licence bar */
.lic { display: grid; gap: var(--space-4); }
.lic-big { font: 600 clamp(2.5rem, 1.6rem + 3vw, 3.75rem)/1 var(--font-sans); color: var(--deep-ocean); letter-spacing: -.02em; }
.lic-big .of { font-size: .45em; font-weight: 500; color: var(--ink-2); letter-spacing: 0; }
.bar { display: flex; height: 36px; border-radius: var(--radius-2); overflow: hidden; border: 1px solid var(--rule); }
.bar span { display: block; height: 100%; flex: 0 0 auto; }
/* Widths are the record counts themselves (flex weights), so the bar can never disagree with the legend */
.bar .ok { flex: 29483 0 0; } .bar .nc { flex: 16716 0 0; } .bar .unk { flex: 3800 0 0; } .bar .rs { flex: 1 0 2px; }
.bar .ok, .legend i.ok { background: var(--depth-2); }
.bar .nc, .legend i.nc { background: var(--fail-tint); background-image: repeating-linear-gradient(135deg, transparent 0 6px, rgba(185, 28, 28, .35) 6px 7px); }
.bar .unk, .legend i.unk { background-color: var(--gap-tint); background-image: repeating-linear-gradient(135deg, transparent 0 5px, var(--gap-fill) 5px 6px); }
.bar .rs, .legend i.rs { background: var(--fail-fill); }
.checks { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.checks li { display: grid; grid-template-columns: 20px 1fr; gap: 8px; color: var(--ink); }
.checks li::before { content: ""; width: 16px; height: 16px; margin-top: 3px; background: var(--ocean); -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M3 8.5l3.2 3L13 4.5' fill='none' stroke='black' stroke-width='2'/%3E%3C/svg%3E") center / contain no-repeat; mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M3 8.5l3.2 3L13 4.5' fill='none' stroke='black' stroke-width='2'/%3E%3C/svg%3E") center / contain no-repeat; }
.legend { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; font: var(--t-small); }
.legend li { display: grid; grid-template-columns: 18px 1fr auto; gap: 10px; align-items: center; }
.legend i { width: 18px; height: 12px; border-radius: 2px; border: 1px solid var(--rule); }
.legend b { font-weight: 600; font-variant-numeric: tabular-nums; }

/* Sources */
.chips { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; margin: 0; padding: 0; }
.chips li { font: 500 .8125rem/1.25rem var(--font-mono); padding: 6px 10px; border: 1px solid var(--rule); border-radius: var(--radius-2); background: var(--surface); color: var(--deep-ocean); }

/* Contents table */
.contents-img { border-radius: var(--radius-3); overflow: hidden; background: #EEF3F7; }
.contents-img img { display: block; width: 100%; }
.tbl td:first-child { white-space: nowrap; font-weight: 600; color: var(--deep-ocean); }
.tbl .ch { font: 500 .75rem/1rem var(--font-mono); color: var(--ink-3); margin-right: 6px; }
.tbl-wrap { overflow-x: auto; border: 1px solid var(--rule); border-radius: var(--radius-3); }
.tbl-wrap .tbl { min-width: 480px; }
@media (max-width: 600px) { .tbl td:first-child { white-space: normal; } }

/* Dark bands */
.band-img { position: relative; overflow: hidden; isolation: isolate; background: var(--deep-ocean); color: var(--on-dark); }
.band-img .bg { position: absolute; inset: 0; z-index: -2; }
.band-img .bg img { width: 100%; height: 100%; object-fit: cover; display: block; }
.band-img::before { content: ""; position: absolute; inset: 0; z-index: -1; background: linear-gradient(90deg, rgba(11, 47, 69, .92) 0%, rgba(11, 47, 69, .7) 60%, rgba(11, 47, 69, .35) 100%); }
.band-img .eyebrow { color: var(--sea-mist); }
.band-img .h1, .band-img .h2 { color: var(--on-dark); }
.band-img p { color: #DCE8F0; }
.band-img a:not(.btn) { color: var(--on-dark); }
.band-img .btn { background: var(--on-dark); color: var(--deep-ocean); border-color: var(--on-dark); }
.band-img .btn.secondary { background: transparent; color: var(--on-dark); border-color: rgba(248, 250, 252, .6); }
.oea .band-img a.btn { color: var(--deep-ocean); }
.oea .band-img a.btn.secondary { color: var(--on-dark); }

/* Sample teaser + reader */
.teaser { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: var(--space-6); align-items: center; padding: var(--space-6); }
@media (max-width: 860px) { .teaser { grid-template-columns: 1fr; padding: var(--space-5); } }
.reader { display: grid; grid-template-columns: 200px minmax(0, 1fr) 320px; gap: var(--space-6); align-items: start; position: relative; }
.reader .toc-col { position: sticky; top: 16px; }
.reader .toc a[aria-disabled="true"] { color: var(--ink-3); pointer-events: none; }
.reader .toc-col .x { font: var(--t-caption); color: var(--ink-3); padding: var(--space-3) 12px 0 15px; }
.reader aside { position: sticky; top: 16px; }
.reader svg.lead-svg { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; overflow: visible; }
@media (max-width: 1100px) { .reader { grid-template-columns: minmax(0, 1fr) 300px; } .reader .toc-col { display: none; } }
@media (max-width: 820px) { .reader { grid-template-columns: 1fr; } .reader aside { position: static; } }
.chapter { display: grid; gap: var(--space-4); }
.chapter + .chapter { margin-top: var(--space-8); padding-top: var(--space-6); border-top: 1px solid var(--rule); }
.chapter .prose { max-width: none; }
.limit { border-left: 3px solid var(--warn-fill); background: var(--warn-tint); padding: 10px 14px; font: var(--t-small); color: var(--ink); border-radius: 0 var(--radius-2) var(--radius-2) 0; }
.limit b { color: var(--warn); }
.fig { margin: 0; display: grid; gap: 6px; }
.fig figcaption { font: var(--t-caption); color: var(--ink-2); }
.figs2 { display: grid; grid-template-columns: minmax(0, 1fr); gap: var(--space-6); align-items: start; }
.figs2 > .fig:first-child .chart { max-width: 400px; }
.prov dd .copy { margin-left: 6px; }
.prov dd .full { word-break: break-all; }
.unsigned { display: inline-flex; }

/* Charts (inline SVG; DESIGN.md 5.11). Every line path gets fill:none. */
.chart { width: 100%; height: auto; display: block; overflow: visible; }
.chart text { font-family: var(--font-sans); font-size: 11px; fill: var(--ink-3); }
.chart .t-ink { fill: var(--ink); }
.chart .t-strong { fill: var(--ink); font-weight: 600; }
.chart .t-signal { fill: var(--signal); font-weight: 600; }
.chart .t-mid { text-anchor: middle; }
.chart .t-end { text-anchor: end; }
.chart .grid { stroke: var(--rule-soft); stroke-width: 1; fill: none; }
.chart .axis { stroke: var(--rule-strong); stroke-width: 1; fill: none; }
.chart .ring { stroke: var(--rule); stroke-width: 1; fill: none; }
.chart .line { stroke: var(--ocean); stroke-width: 2; fill: none; }
.chart .pt { fill: var(--ocean); }
.chart .pt-signal { fill: var(--signal-line); }
.chart .guide { stroke: var(--signal-line); stroke-width: 1; stroke-dasharray: 3 3; fill: none; }
.chart .barf { fill: var(--ocean); }
.chart .barf.hi { fill: var(--deep-ocean); }
.chart .barf.partial { fill: url(#hatch-w5); stroke: var(--ocean); stroke-width: 1; }
.chart .barf.under { fill: var(--depth-2); }
.chart .d1 { fill: var(--depth-1); } .chart .d2 { fill: var(--depth-2); } .chart .d3 { fill: var(--depth-3); } .chart .d4 { fill: var(--depth-4); } .chart .d5 { fill: var(--depth-5); }
.chart .wedge { stroke: var(--surface); stroke-width: .75; }
.chart .hatch-line { stroke: var(--ocean); stroke-width: 1; }
.key { display: flex; flex-wrap: wrap; gap: 6px 14px; list-style: none; margin: 0; padding: 0; font: var(--t-caption); color: var(--ink-2); }
.key li { display: inline-flex; gap: 6px; align-items: center; }
.key i { width: 12px; height: 12px; border-radius: 2px; border: 1px solid var(--rule); }
.key .d1 { background: var(--depth-1); } .key .d2 { background: var(--depth-2); } .key .d3 { background: var(--depth-3); } .key .d4 { background: var(--depth-4); } .key .d5 { background: var(--depth-5); }

/* Prose pages */
.doc { max-width: 720px; display: grid; gap: var(--space-4); }
.doc h2 { margin-top: var(--space-5); }
.doc p, .doc li { color: var(--ink); line-height: 1.65; }
.doc ul { margin: 0; padding-left: 1.25em; display: grid; gap: 6px; }

/* Footer */
.site-foot { padding: var(--space-7) 0 var(--space-6); }
.site-foot .cols { display: grid; grid-template-columns: minmax(0, 2fr) repeat(2, minmax(0, 1fr)); gap: var(--space-6); }
.site-foot ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; font: var(--t-small); }
.site-foot a { text-decoration: none; color: var(--on-dark); }
.site-foot a:hover { text-decoration: underline; }
.site-foot .h4 { color: var(--on-dark-2); font: var(--t-eyebrow); letter-spacing: var(--track-eyebrow); text-transform: uppercase; margin-bottom: var(--space-3); }
.site-foot .fine { margin-top: var(--space-6); padding-top: var(--space-4); border-top: 1px solid rgba(183, 212, 230, .25); display: flex; flex-wrap: wrap; justify-content: space-between; gap: var(--space-3); font: var(--t-caption); color: var(--on-dark-2); }
.site-foot p { font: var(--t-small); color: #DCE8F0; max-width: 40ch; margin-top: var(--space-3); }
@media (max-width: 760px) { .site-foot .cols { grid-template-columns: 1fr 1fr; } .site-foot .cols > :first-child { grid-column: 1 / -1; } }

/* Subjects list (what's in a study) */
.subjects { display: grid; gap: var(--space-3); }
.subjects .cols { columns: 2; column-gap: var(--space-6); margin: 0; padding-left: 1.1em; font: var(--t-small); color: var(--ink-2); }
.subjects .cols li { break-inside: avoid; margin-bottom: 6px; }
@media (max-width: 600px) { .subjects .cols { columns: 1; } }