/* =========================================================
   ICP · Editorial Statesman — design tokens
   ========================================================= */

:root {
    /* ----- Color: warm paper + ink ----- */
    --ink:           #14182E;        /* primary text, near-black with blue undertone */
    --ink-soft:      #2A2F4A;
    --ink-mute:      #5C6182;
    --rule:          #1A2347;        /* deepened ICP navy used for rules and accents */
    --rule-faint:    rgba(20, 24, 46, 0.16);
    --rule-hair:     rgba(20, 24, 46, 0.08);

    --paper:         #F4EFE6;        /* warm ivory base */
    --paper-deep:    #ECE4D4;        /* aged paper */
    --paper-cool:    #E8E2D0;
    --paper-white:   #FBF8F1;

    --gold:          #B08D3C;        /* dust gold accent */
    --gold-deep:     #8C6E22;
    --oxblood:       #8B2C2C;        /* editorial red, used sparingly */
    --oxblood-deep:  #6B1F1F;

    --blue-mid:      #4179BD;        /* preserved from brand */
    --blue-pale:     #BBCCEA;

    --shadow-ink:    0 30px 60px -30px rgba(20, 24, 46, 0.45);
    --shadow-soft:   0 18px 38px -22px rgba(20, 24, 46, 0.28);

    /* ----- Typography ----- */
    --font-display:  'Fraunces', 'Times New Roman', serif;
    --font-italic:   'Instrument Serif', 'Fraunces', serif;
    --font-body:     'IBM Plex Sans', 'Helvetica Neue', sans-serif;
    --font-mono:     'JetBrains Mono', 'Courier New', monospace;

    /* fluid scale (clamps) */
    --fs-eyebrow:    0.72rem;
    --fs-body:       1.025rem;
    --fs-lead:       clamp(1.12rem, 0.95rem + 0.6vw, 1.32rem);
    --fs-h6:         1.05rem;
    --fs-h5:         1.25rem;
    --fs-h4:         clamp(1.4rem, 1.15rem + 0.9vw, 1.85rem);
    --fs-h3:         clamp(1.85rem, 1.4rem + 1.5vw, 2.6rem);
    --fs-h2:         clamp(2.4rem, 1.8rem + 2.4vw, 3.8rem);
    --fs-h1:         clamp(3.2rem, 2.2rem + 4vw, 6rem);
    --fs-display:    clamp(4rem, 2.5rem + 7vw, 9rem);

    /* ----- Layout ----- */
    --gutter:        clamp(1.2rem, 0.9rem + 1.6vw, 2.4rem);
    --max-w:         1320px;
    --max-w-text:    700px;
    --max-w-prose:   60ch;

    --radius-none:   0px;
    --radius-sm:     2px;
    --radius-md:     4px;

    /* ----- Motion ----- */
    --ease-out:      cubic-bezier(0.22, 1, 0.36, 1);
    --ease-soft:     cubic-bezier(0.4, 0, 0.2, 1);
    --t-fast:        180ms;
    --t-med:         320ms;
    --t-slow:        680ms;
}

/* ----- Print-grade defaults ----- */
* { box-sizing: border-box; }
*::selection { background: var(--ink); color: var(--paper); }

html {
    background: var(--paper);
    color: var(--ink);
    font-family: var(--font-body);
    font-size: 17px;
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background:
        radial-gradient(1200px 600px at 80% -10%, rgba(176, 141, 60, 0.10), transparent 60%),
        radial-gradient(900px 500px at -10% 110%, rgba(65, 121, 189, 0.08), transparent 60%),
        var(--paper);
    min-height: 100vh;
    overflow-x: hidden;
}

/* paper-grain noise overlay applied via body::before */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 1;
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='220' height='220'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0.08  0 0 0 0 0.09  0 0 0 0 0.18  0 0 0 0.32 0'/></filter><rect width='100%' height='100%' filter='url(%23n)' opacity='0.55'/></svg>");
    mix-blend-mode: multiply;
    opacity: 0.55;
}

/* hairline rule lines on the page edges */
body::after {
    content: '';
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 2;
    border: 1px solid var(--rule-hair);
    margin: 12px;
}

main, header, footer { position: relative; z-index: 3; }

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

/* ----- Reset typographic basics ----- */
h1, h2, h3, h4, h5, h6, p, ul, ol, figure, blockquote {
    margin: 0;
    padding: 0;
}

ul { list-style: none; }

button {
    font: inherit;
    color: inherit;
    background: none;
    border: 0;
    cursor: pointer;
}

input, select, textarea {
    font: inherit;
    color: inherit;
}

/* ----- Containers ----- */
.wrap {
    width: 100%;
    max-width: var(--max-w);
    margin: 0 auto;
    padding-inline: var(--gutter);
}

.wrap-narrow {
    width: 100%;
    max-width: 920px;
    margin: 0 auto;
    padding-inline: var(--gutter);
}

.wrap-prose {
    width: 100%;
    max-width: 760px;
    margin: 0 auto;
    padding-inline: var(--gutter);
}

/* ----- Editorial type helpers ----- */
.eyebrow {
    font-family: var(--font-mono);
    font-size: var(--fs-eyebrow);
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--ink-mute);
    font-weight: 500;
}

.eyebrow--ink   { color: var(--ink); }
.eyebrow--paper { color: rgba(244, 239, 230, 0.72); }
.eyebrow--gold  { color: var(--gold-deep); }

.display-1 {
    font-family: var(--font-display);
    font-weight: 360;
    font-size: var(--fs-h1);
    line-height: 0.95;
    letter-spacing: -0.025em;
    font-variation-settings: "opsz" 144, "SOFT" 30;
}

.display-2 {
    font-family: var(--font-display);
    font-weight: 380;
    font-size: var(--fs-h2);
    line-height: 1.0;
    letter-spacing: -0.022em;
    font-variation-settings: "opsz" 96, "SOFT" 25;
}

.display-3 {
    font-family: var(--font-display);
    font-weight: 420;
    font-size: var(--fs-h3);
    line-height: 1.08;
    letter-spacing: -0.018em;
    font-variation-settings: "opsz" 72, "SOFT" 20;
}

.it { font-family: var(--font-italic); font-style: italic; font-weight: 400; }

.rule {
    border: 0;
    border-top: 1px solid var(--rule-faint);
    margin: 0;
}

.rule-double {
    border: 0;
    border-top: 1px solid var(--rule);
    border-bottom: 1px solid var(--rule);
    height: 5px;
    margin: 0;
}

.rule-hair { border-top-color: var(--rule-hair); }

/* Page index for editorial atmosphere (top-right marker) */
.page-mark {
    position: fixed;
    top: 26px;
    right: 26px;
    z-index: 60;
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.24em;
    text-transform: uppercase;
    color: var(--ink-mute);
    display: flex;
    gap: 14px;
    align-items: center;
    pointer-events: none;
}

.page-mark span::before {
    content: '— ';
    opacity: 0.6;
}

@media (max-width: 720px) {
    .page-mark { display: none; }
}

/* ----- Buttons ----- */
.btn {
    --btn-fg: var(--paper);
    --btn-bg: var(--ink);
    --btn-bd: var(--ink);

    display: inline-flex;
    align-items: center;
    gap: 0.7em;
    padding: 0.95rem 1.5rem 0.85rem;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--btn-fg);
    background: var(--btn-bg);
    border: 1px solid var(--btn-bd);
    border-radius: var(--radius-sm);
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: transform var(--t-med) var(--ease-out), background var(--t-med) var(--ease-out), color var(--t-med) var(--ease-out);
    isolation: isolate;
}

.btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--paper);
    transform: translateY(101%);
    transition: transform var(--t-med) var(--ease-out);
    z-index: -1;
}

.btn:hover { color: var(--ink); }
.btn:hover::before { transform: translateY(0); }

.btn .arrow {
    display: inline-block;
    transition: transform var(--t-med) var(--ease-out);
}
.btn:hover .arrow { transform: translateX(4px); }

.btn--ghost {
    --btn-fg: var(--ink);
    --btn-bg: transparent;
    --btn-bd: var(--ink);
}
.btn--ghost::before { background: var(--ink); }
.btn--ghost:hover { color: var(--paper); }

.btn--gold {
    --btn-fg: var(--ink);
    --btn-bg: var(--gold);
    --btn-bd: var(--gold);
}
.btn--gold::before { background: var(--ink); }
.btn--gold:hover { color: var(--paper); }

.btn--paper {
    --btn-fg: var(--ink);
    --btn-bg: var(--paper);
    --btn-bd: var(--paper);
}
.btn--paper::before { background: var(--ink); }
.btn--paper:hover { color: var(--paper); }

/* Inline link with hand-drawn-ish underline */
.link-ink {
    position: relative;
    display: inline-flex;
    align-items: baseline;
    gap: 0.4em;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--ink);
    padding-bottom: 4px;
}
.link-ink::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 1px;
    background: var(--ink);
    transform-origin: left center;
    transition: transform var(--t-med) var(--ease-out);
}
.link-ink:hover::after {
    transform: scaleX(1.1);
}
.link-ink .arrow {
    transition: transform var(--t-med) var(--ease-out);
}
.link-ink:hover .arrow { transform: translateX(4px); }

/* ----- Accessibility helpers ----- */
.sr-only {
    position: absolute;
    width: 1px; height: 1px;
    padding: 0; margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

:focus-visible {
    outline: 2px solid var(--gold-deep);
    outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001ms !important;
        scroll-behavior: auto !important;
    }
}