/* =========================================================
   Ajax Autocomplete demo  —  "engineering-reference" theme.
   Set in Fraunces (variable serif, opsz + SOFT axes) and
   IBM Plex Mono. Warm paper background, ink-black text,
   one rust accent.
   ========================================================= */

:root {
    --paper:        #f4eee2;
    --paper-2:      #faf6ec;
    --paper-3:      #ebe3d0;
    --ink:          #1c1a16;
    --ink-2:        #524c43;
    --ink-3:        #8a8275;
    --rule:         #d8cfba;
    --rule-2:       #b8ad97;
    --accent:       #b34328;
    --accent-2:     #8c2f1c;
    --accent-bg:    #f5d8cc;
    --string:       #5b6b2e;

    --serif: "Fraunces", "Iowan Old Style", "Palatino Linotype", Georgia, serif;
    --mono:  "IBM Plex Mono", "JetBrains Mono", Menlo, Consolas, monospace;

    --maxw:   1180px;
    --gutter: clamp(1.5rem, 4vw, 3rem);
}

/* ------------------ base ------------------ */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: var(--serif);
    font-variation-settings: "opsz" 18, "SOFT" 30;
    background: var(--paper);
    color: var(--ink);
    font-size: 17px;
    line-height: 1.55;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    background-image:
        radial-gradient(at 0% 0%, rgba(179, 67, 40, 0.045), transparent 45%),
        radial-gradient(at 100% 100%, rgba(28, 26, 22, 0.06), transparent 55%);
    background-attachment: fixed;
}

a {
    color: var(--accent);
    text-decoration: underline;
    text-underline-offset: 3px;
    text-decoration-thickness: 1px;
    transition: text-decoration-thickness 0.12s ease, color 0.12s ease;
}
a:hover { color: var(--accent-2); text-decoration-thickness: 2px; }

em { font-style: italic; font-variation-settings: "opsz" 32, "SOFT" 80; }

kbd {
    font-family: var(--mono);
    font-size: 0.78em;
    padding: 0.05em 0.4em;
    border: 1px solid var(--rule-2);
    border-bottom-width: 2px;
    background: var(--paper-2);
    border-radius: 3px;
    color: var(--ink);
}

code {
    font-family: var(--mono);
    font-size: 0.9em;
    font-feature-settings: "calt" 0;
}

p, h1, h2, h3 { margin: 0; }

/* ------------------ masthead ------------------ */
.masthead {
    max-width: var(--maxw);
    margin: 0 auto;
    padding: clamp(3rem, 8vw, 6.5rem) var(--gutter) clamp(2.5rem, 5vw, 4rem);
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: clamp(2rem, 5vw, 4rem);
    align-items: end;
    border-bottom: 1px solid var(--rule);
    position: relative;
}

.eyebrow {
    font-family: var(--mono);
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.18em;
    color: var(--ink-3);
    margin: 0 0 1.5rem;
    font-weight: 500;
}

.lockup {
    margin: 0;
    line-height: 0.86;
    font-size: clamp(3.6rem, 11vw, 9.2rem);
    letter-spacing: -0.04em;
}
.lockup__a,
.lockup__b { display: block; }
.lockup__a {
    font-style: italic;
    font-weight: 500;
    font-variation-settings: "opsz" 144, "SOFT" 100;
    color: var(--accent);
}
.lockup__b {
    font-weight: 700;
    font-variation-settings: "opsz" 144, "SOFT" 30;
}

.lede {
    margin: 1.75rem 0 0;
    font-size: clamp(1.1rem, 1.6vw, 1.35rem);
    line-height: 1.5;
    max-width: 38em;
    color: var(--ink-2);
}

/* printer's stamp, upper right */
.stamp {
    align-self: start;
    justify-self: end;
    transform: rotate(-4deg);
    border: 2px solid var(--accent);
    color: var(--accent);
    padding: 0.55rem 1.05rem 0.5rem;
    text-align: center;
    background: var(--paper);
    box-shadow: 5px 5px 0 var(--paper-3), 5px 5px 0 1px var(--rule-2);
    font-family: var(--mono);
    display: flex;
    flex-direction: column;
    gap: 0.05rem;
    line-height: 1;
    margin-top: 0.5rem;
    position: relative;
}
.stamp::before {
    content: "";
    position: absolute;
    inset: 4px;
    border: 1px solid var(--accent);
    pointer-events: none;
    opacity: 0.35;
}
.stamp__line1,
.stamp__line3 {
    font-size: 0.58rem;
    letter-spacing: 0.22em;
    font-weight: 600;
    text-transform: uppercase;
}
.stamp__big {
    font-size: 1.75rem;
    font-weight: 700;
    margin: 0.15rem 0;
    font-feature-settings: "tnum" 1;
}

/* ------------------ install ------------------ */
.install {
    max-width: var(--maxw);
    margin: 0 auto;
    padding: 2.25rem var(--gutter) 2.5rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    column-gap: 1.5rem;
    row-gap: 0.9rem;
    border-bottom: 1px solid var(--rule);
}
.install__row {
    display: grid;
    grid-template-columns: 56px minmax(0, 1fr);
    align-items: stretch;
    gap: 0.9rem;
}
.install__row--cdn { grid-column: 1 / -1; }
.install__label {
    font-family: var(--mono);
    font-size: 0.65rem;
    letter-spacing: 0.2em;
    color: var(--ink-3);
    text-transform: uppercase;
    margin: 0;
    align-self: center;
    font-weight: 600;
}
.install__snippet {
    margin: 0;
    padding: 0.65rem 0.95rem;
    background: var(--paper-2);
    border-left: 2px solid var(--accent);
    font-family: var(--mono);
    font-size: 0.85rem;
    overflow-x: auto;
    color: var(--ink);
    line-height: 1.4;
}
.install__snippet .prompt {
    color: var(--accent);
    user-select: none;
    margin-right: 0.6em;
    font-weight: 600;
}
.install__meta {
    grid-column: 1 / -1;
    margin: 1.5rem 0 0;
    padding: 1.25rem 0 0;
    border-top: 1px dashed var(--rule);
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 2.5rem;
    font-family: var(--mono);
}
.install__meta > div { display: flex; gap: 0.65rem; align-items: baseline; }
.install__meta dt {
    color: var(--ink-3);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    font-size: 0.62rem;
    font-weight: 600;
}
.install__meta dd { margin: 0; font-size: 0.85rem; }
.install__meta a { font-family: var(--mono); }

/* ------------------ demos ------------------ */
.demos {
    max-width: var(--maxw);
    margin: 0 auto;
    padding: 0 var(--gutter);
}

.demo {
    padding: clamp(2.5rem, 6vw, 4.5rem) 0;
    border-bottom: 1px solid var(--rule);
    opacity: 0;
    transform: translateY(14px);
    animation: rise 0.7s cubic-bezier(0.2, 0.7, 0.2, 1) forwards;
}
.demo:last-child { border-bottom: none; }
.demo:nth-of-type(1) { animation-delay: 0.05s; }
.demo:nth-of-type(2) { animation-delay: 0.14s; }
.demo:nth-of-type(3) { animation-delay: 0.23s; }
.demo:nth-of-type(4) { animation-delay: 0.32s; }

.demo__head { margin-bottom: 2.5rem; }
.demo__num {
    font-family: var(--serif);
    font-variation-settings: "opsz" 144, "SOFT" 30;
    font-weight: 900;
    font-size: clamp(2.8rem, 6.5vw, 4.5rem);
    color: var(--accent);
    line-height: 0.9;
    margin-right: 0.6rem;
    vertical-align: -0.07em;
    letter-spacing: -0.05em;
    font-feature-settings: "tnum" 1;
    display: inline-block;
}
.demo__title {
    display: inline;
    font-size: clamp(1.5rem, 2.8vw, 2.15rem);
    font-weight: 600;
    font-variation-settings: "opsz" 60, "SOFT" 70;
    letter-spacing: -0.015em;
    line-height: 1.15;
}
.demo__sub {
    margin: 1.1rem 0 0;
    max-width: 60em;
    color: var(--ink-2);
    font-size: clamp(1rem, 1.2vw, 1.1rem);
    line-height: 1.55;
}
.demo__sub code,
.demo__codenote code {
    background: var(--paper-3);
    padding: 0.05em 0.35em;
    border-radius: 2px;
    color: var(--ink);
    font-size: 0.86em;
}

.demo__body {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    gap: clamp(1.5rem, 4vw, 3.5rem);
    align-items: start;
}

/* ------------ try-it column ------------ */
.demo__try-label {
    font-family: var(--mono);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.18em;
    color: var(--ink-3);
    margin: 0 0 0.7rem;
    font-weight: 500;
}
.demo__readout {
    margin-top: 1.1rem;
    padding: 0.8rem 1rem;
    background: var(--paper-2);
    border-left: 2px solid var(--rule);
    font-family: var(--mono);
    font-size: 0.83rem;
    color: var(--ink-2);
    min-height: 1.5em;
    line-height: 1.45;
    transition: border-color 0.2s ease, color 0.2s ease;
}
.demo__readout.has-selection {
    border-left-color: var(--accent);
    color: var(--ink);
}

/* ------------ inputs ------------ */
.demo__input,
.ghost-stack__main,
.ghost-stack__ghost {
    font-family: var(--serif);
    font-variation-settings: "opsz" 22, "SOFT" 30;
    font-size: 1.25rem;
    padding: 0.7em 0.9em;
    background: var(--paper-2);
    border: 1px solid var(--rule-2);
    color: var(--ink);
    width: 100%;
    outline: none;
    transition: border-color 0.15s ease, background 0.15s ease;
    display: block;
    border-radius: 0;
    -webkit-appearance: none;
    appearance: none;
}
.demo__input:focus {
    border-color: var(--accent);
    background: #ffffff;
}
.demo__input::placeholder,
.ghost-stack__main::placeholder {
    color: var(--ink-3);
    font-style: italic;
    opacity: 1;
}
.demo__input--narrow { max-width: 260px; }
.demo__input--wide   { width: 100%; max-width: none; }

/* ghost (#01) */
.ghost-stack {
    position: relative;
    min-height: 3.5rem;
    height: calc(1lh + 1.4em + 2px); /* font line + 2× 0.7em padding + 1px border */
}
.ghost-stack__main,
.ghost-stack__ghost {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
}
.ghost-stack__ghost {
    color: var(--ink-3);
    -webkit-text-fill-color: var(--ink-3);   /* override Safari disabled override */
    opacity: 1;
    background: var(--paper-2);
    z-index: 1;
    user-select: none;
}
.ghost-stack__main {
    background: transparent;
    border-color: transparent;
    z-index: 2;
}
.ghost-stack:focus-within .ghost-stack__ghost {
    border-color: var(--accent);
    background: #ffffff;
}

/* inline custom container (#03) */
.inline-stack {
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
    flex-wrap: wrap;
}
.inline-stack__sink {
    flex: 1 1 240px;
    min-width: 240px;
    min-height: 3.5rem;
    border-left: 1px dashed var(--rule-2);
    padding: 0.25rem 0 0 1.2rem;
    color: var(--ink-3);
    font-family: var(--mono);
    font-size: 0.78rem;
    font-style: italic;
}
.inline-stack__sink:has(.autocomplete-suggestions) .inline-stack__hint { display: none; }
.inline-stack__hint { letter-spacing: 0.1em; }

/* ------------ code column ------------ */
.demo__code {
    margin: 0;
    padding: 1.3rem 1.5rem;
    background: var(--paper-2);
    border-left: 3px solid var(--accent);
    box-shadow: 5px 5px 0 var(--paper-3);
    font-family: var(--mono);
    font-size: 0.83rem;
    line-height: 1.75;
    overflow-x: auto;
    color: var(--ink);
    tab-size: 4;
}
.demo__code .k   { color: var(--accent-2); font-weight: 600; }
.demo__code .s   { color: var(--string); }
.demo__code .kw  { color: var(--ink); font-weight: 600; }
.demo__code .c   { color: var(--ink-3); font-style: italic; }
.demo__code .m   { color: var(--ink-2); font-weight: 500; }
.demo__codenote {
    margin: 1rem 0 0;
    font-size: 0.86rem;
    color: var(--ink-3);
    font-style: italic;
    line-height: 1.5;
}

/* ------------------ plugin classes ------------------ */
.autocomplete-suggestions {
    background: var(--paper-2);
    border: 1px solid var(--rule-2);
    box-shadow: 5px 5px 0 var(--paper-3);
    font-family: var(--serif);
    font-variation-settings: "opsz" 18, "SOFT" 30;
    font-size: 1.05rem;
    color: var(--ink);
    overflow: auto;
    cursor: default;
    border-radius: 0;
    margin-top: 2px;
}
.autocomplete-suggestion {
    padding: 0.55em 0.95em;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    transition: background 0.08s ease;
    line-height: 1.35;
}
.autocomplete-no-suggestion {
    padding: 0.7em 0.95em;
    color: var(--ink-3);
    font-style: italic;
    font-family: var(--serif);
}
.autocomplete-selected {
    background: var(--accent-bg);
    color: var(--ink);
}
.autocomplete-suggestions strong {
    /* match highlight rendered as an editor's underline, not bold-only */
    font-weight: 600;
    color: var(--accent-2);
    border-bottom: 1px solid var(--accent);
    padding-bottom: 1px;
}
.autocomplete-group {
    padding: 0.6em 0.95em 0.5em;
    font-family: var(--mono);
    font-size: 0.65rem;
    font-weight: 600;
    color: var(--ink-3);
    letter-spacing: 0.22em;
    text-transform: uppercase;
    background: var(--paper-3);
    border-bottom: 1px solid var(--rule);
    line-height: 1;
}
.autocomplete-group + .autocomplete-suggestion { padding-top: 0.65em; }
.autocomplete-suggestion + .autocomplete-group { border-top: 1px solid var(--rule); }

/* ------------------ colophon ------------------ */
.colophon {
    max-width: var(--maxw);
    margin: 0 auto;
    padding: clamp(2rem, 5vw, 3.5rem) var(--gutter) clamp(3rem, 6vw, 5rem);
    border-top: 1px solid var(--rule);
    font-size: 0.88rem;
    color: var(--ink-2);
    line-height: 1.55;
}
.colophon__line { margin: 0 0 0.4rem; }
.colophon__line strong { font-weight: 600; }
.colophon__rule { margin: 0 0.65em; color: var(--ink-3); }
.colophon__set {
    margin: 0;
    font-style: italic;
    color: var(--ink-3);
    font-size: 0.85rem;
}

/* ------------------ entrance ------------------ */
.masthead { opacity: 0; animation: rise 0.65s cubic-bezier(0.2, 0.7, 0.2, 1) forwards; }
.install  { opacity: 0; animation: rise 0.65s cubic-bezier(0.2, 0.7, 0.2, 1) 0.06s forwards; }
@keyframes rise {
    to { opacity: 1; transform: translateY(0); }
}

/* ------------------ responsive ------------------ */
@media (max-width: 880px) {
    .masthead {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        align-items: start;
    }
    .stamp { justify-self: start; align-self: start; }
    .install { grid-template-columns: 1fr; }
    .install__row { grid-template-columns: 1fr; gap: 0.45rem; }
    .install__row--cdn { grid-column: 1; }
    .demo__body { grid-template-columns: 1fr; gap: 1.75rem; }
    .demo__num {
        display: block;
        margin: 0 0 0.4rem;
        font-size: 3.5rem;
    }
    .demo__title { display: block; }
    .inline-stack { flex-direction: column; gap: 1rem; }
    .inline-stack__sink { border-left: none; border-top: 1px dashed var(--rule-2); padding: 1rem 0 0; }
}

@media (max-width: 480px) {
    body { font-size: 16px; }
    .demo__input, .ghost-stack__main, .ghost-stack__ghost { font-size: 1.1rem; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation: none !important; transition: none !important; }
    .demo, .masthead, .install { opacity: 1; transform: none; }
}