/* ============================================================
   base.css: reset, typography, controls, form fields, scrollbars
   ============================================================ */

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

html,
body {
    height: 100%;
}

body {
    margin: 0;
    font-family: var(--font-ui);
    font-size: 16.5px;
    line-height: 1.5;
    color: var(--text);
    background: var(--ink-900);
    overflow: hidden;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
    overscroll-behavior: none;
}

h1,
h2,
h3,
h4 {
    margin: 0;
    font-weight: 700;
    letter-spacing: -0.01em;
}

p {
    margin: 0;
}

ul {
    margin: var(--sp-2) 0 0;
    padding-left: 1.1em;
}

li {
    margin-bottom: var(--sp-1);
}

strong {
    color: var(--text);
    font-weight: 700;
}

kbd {
    font-family: var(--font-mono);
    font-size: 11px;
    line-height: 1;
    padding: 3px 6px;
    background: rgba(0, 0, 0, .35);
    border: 1px solid var(--rule-faint);
    color: inherit;
    opacity: .65;
}

/* ---------------- Icons ----------------
   Engraved line marks. Mitred joins and butt caps, not rounded: these should
   look struck into brass, not drawn in a design tool. */

.ico {
    width: 1.15em;
    height: 1.15em;
    flex: none;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.5;
    stroke-linecap: butt;
    stroke-linejoin: miter;
    vector-effect: non-scaling-stroke;
}

.ico--fill {
    fill: currentColor;
    stroke: none;
}

#svg-defs {
    position: absolute;
    width: 0;
    height: 0;
    pointer-events: none;
}

.txt-red {
    color: var(--red-hot);
}

.txt-green {
    color: var(--green);
}

.suit {
    font-family: var(--font-suit);
    color: var(--text);
}

.suit--red {
    color: var(--suit-red);
    filter: brightness(1.4);
}

/* ---------------- App shell ---------------- */

#app {
    position: relative;
    z-index: 2;
    width: 100%;
    height: 100%;
}

.screen {
    position: absolute;
    inset: 0;
    display: none;
    flex-direction: column;
    /* keeps the parked (translated-off) log panel from widening the document */
    overflow: hidden;
}

.screen.is-active {
    display: flex;
}

/* ---------------- Buttons ---------------- */

/*
 * A struck plate with a rule around it and a second rule outside that. The
 * doubled line is what makes a flat rectangle read as engraved rather than as
 * a flat-design button.
 */
.btn {
    --btn-bg: var(--ink-700);
    --btn-fg: var(--text);
    --btn-line: var(--rule);
    --btn-glow: none;

    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--sp-2);
    padding: 13px 24px;
    font-family: var(--font-ui);
    font-size: 15px;
    font-weight: 700;
    letter-spacing: .06em;
    text-transform: uppercase;
    color: var(--btn-fg);
    background: var(--btn-bg);
    border: 1px solid var(--btn-line);
    border-radius: var(--r-sm);
    cursor: pointer;
    white-space: nowrap;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
    background-image: var(--hatch-fine);
    box-shadow: var(--sh-1);
    transition:
        transform var(--t-fast) var(--ease-out),
        filter var(--t-fast) linear,
        box-shadow var(--t-med) var(--ease-out),
        background-color var(--t-med) var(--ease-out),
        border-color var(--t-med) var(--ease-out),
        opacity var(--t-med) linear;
}

/* the inner of the two rules. Inset rather than outset so it cannot overflow
   a scroll container the way an outline-offset would. */
.btn::after {
    content: '';
    position: absolute;
    inset: 3px;
    border: 1px solid var(--rule-faint);
    pointer-events: none;
    transition: border-color var(--t-med);
}

.btn:hover:not(:disabled)::after {
    border-color: var(--rule);
}

.btn:hover:not(:disabled) {
    filter: brightness(1.14);
}

/* presses down into its own shadow rather than floating */
.btn:active:not(:disabled) {
    transform: translateY(2px);
    box-shadow: none;
    filter: brightness(.94);
}

.btn:focus-visible {
    outline: 2px solid var(--amber);
    outline-offset: 3px;
}

.btn:disabled {
    cursor: not-allowed;
    opacity: .38;
    filter: grayscale(.6);
    box-shadow: none;
}

/* the one solid-gold element on the plate: the press has inked it in */
.btn--primary {
    --btn-bg: var(--gold);
    --btn-fg: #0a0908;
    --btn-line: var(--gold-hot);
}

.btn--primary::after {
    border-color: rgba(10, 9, 8, .3);
}

.btn--primary:hover:not(:disabled)::after {
    border-color: rgba(10, 9, 8, .5);
}

.btn--danger {
    --btn-bg: var(--oxblood);
    --btn-fg: #f4dcdf;
    --btn-line: #b8404e;
}

.btn--danger::after {
    border-color: rgba(244, 220, 223, .2);
}

.btn--ghost {
    --btn-bg: transparent;
    --btn-fg: var(--text);
    --btn-line: var(--rule);
}

.btn--ghost:hover:not(:disabled) {
    --btn-bg: rgba(201, 169, 97, .07);
    --btn-line: var(--rule-strong);
}

.btn--quiet {
    --btn-bg: transparent;
    --btn-fg: var(--text-dim);
    --btn-line: transparent;
    box-shadow: none;
}

.btn--quiet::after {
    display: none;
}

.btn--quiet:hover:not(:disabled) {
    --btn-fg: var(--gold-hot);
    --btn-bg: rgba(201, 169, 97, .07);
}

.btn--lg {
    padding: 18px 30px;
    font-size: 16px;
}

.btn--sm {
    padding: 9px 15px;
    font-size: 12.5px;
}

.btn--block {
    width: 100%;
}

/* Icon button (HUD) */
.icon-btn {
    display: grid;
    place-items: center;
    width: 42px;
    height: 42px;
    padding: 0;
    font-size: 16px;
    line-height: 1;
    color: var(--gold);
    background: var(--ink-850);
    border: 1px solid var(--rule);
    border-radius: var(--r-sm);
    /* the second rule, struck outside. Safe here: these sit in the floating
       controls, which are absolutely positioned and clip nothing. */
    outline: 1px solid var(--rule-faint);
    outline-offset: 2px;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
    transition: color var(--t-fast), background var(--t-fast), border-color var(--t-fast), outline-color var(--t-fast), transform var(--t-fast);
}

.icon-btn:hover {
    color: var(--gold-hot);
    border-color: var(--rule-strong);
    outline-color: var(--rule);
    background: var(--ink-700);
}

.icon-btn:active {
    transform: translateY(1px);
}

.icon-btn.is-off {
    color: var(--text-faint);
    opacity: .6;
}

.icon-btn--sm {
    width: 32px;
    height: 32px;
}

.icon-btn--sm .ico {
    width: 15px;
    height: 15px;
}

.icon-btn .ico {
    width: 20px;
    height: 20px;
}

/* the "?" on the rules button, set in the signage face, not an icon */
.icon-btn--glyph {
    font-family: var(--font-display);
    font-size: 24px;
    padding-top: 2px;
}

/* ---------------- Fields ---------------- */

.field {
    display: block;
    text-align: left;
    margin-bottom: var(--sp-4);
}

.field__label {
    display: block;
    margin-bottom: var(--sp-2);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: .14em;
    text-transform: uppercase;
    color: var(--text-faint);
}

.field__hint {
    display: block;
    min-height: 15px;
    margin-top: 5px;
    font-size: 12px;
    color: var(--red-hot);
    opacity: 0;
    transition: opacity var(--t-fast);
}

.field__hint.is-shown {
    opacity: 1;
}

input[type="text"] {
    width: 100%;
    padding: 15px 17px;
    font-family: var(--font-ui);
    font-size: 16.5px;
    font-weight: 500;
    color: var(--text);
    background: var(--ink-900);
    border: 1px solid var(--rule);
    border-radius: var(--r-sm);
    /* a ruled underline, the way a form on a printed certificate is drawn */
    box-shadow: inset 0 -2px 0 -1px var(--rule-faint);
    transition: border-color var(--t-med), box-shadow var(--t-med), background var(--t-med);
}

input[type="text"]::placeholder {
    color: var(--text-faint);
    font-weight: 400;
}

input[type="text"]:focus {
    outline: none;
    border-color: var(--rule-strong);
    background: var(--ink-900);
    box-shadow: inset 0 0 0 1px var(--rule);
}

.input--code {
    font-family: var(--font-engraved);
    font-size: 30px;
    font-weight: 700;
    letter-spacing: .3em;
    text-align: center;
    text-transform: uppercase;
    text-indent: .3em;
    color: var(--gold-hot);
}

/* ---------------- Segmented control ---------------- */

.segmented {
    display: inline-flex;
    padding: 3px;
    background: var(--ink-900);
    border: 1px solid var(--rule);
    border-radius: var(--r-sm);
}

.segmented button {
    padding: 8px 14px;
    font-family: var(--font-mono);
    font-size: 12.5px;
    font-weight: 700;
    letter-spacing: .04em;
    color: var(--text-faint);
    background: transparent;
    border: 0;
    border-radius: 0;
    cursor: pointer;
    transition: color var(--t-fast), background var(--t-fast);
}

.segmented button:hover {
    color: var(--text);
}

.segmented button.is-active {
    color: #0a0908;
    background: var(--gold);
}

/* ---------------- Panels ---------------- */

/*
 * An engraved plate. Flat ink, a struck rule around the edge and a second one
 * set inside it, with the field lightly hatched. Depth is line weight only:
 * no fill blend, no soft shadow, nothing lit.
 */
.panel {
    position: relative;
    background-color: var(--ink-850);
    background-image: var(--hatch-fine);
    border: 1px solid var(--rule);
    border-radius: var(--r-md);
    box-shadow: var(--sh-3);
    /* the inset rule is an outline, not a pseudo-element, so it stays put
       even when the panel's contents scroll */
    outline: 1px solid var(--frame-line);
    outline-offset: calc(var(--frame-inset) * -1);
}

/*
 * Engraved corner marks. Only two, diagonally opposite: four reads as a
 * certificate border and starts to look fussy at small panel sizes. They sit
 * inside the outline, and are decorative, so they never take clicks.
 */
.panel::before,
.panel::after {
    content: '';
    position: absolute;
    width: 13px;
    height: 13px;
    border: 1px solid var(--rule-strong);
    pointer-events: none;
}

.panel::before {
    top: 2px;
    left: 2px;
    border-right: 0;
    border-bottom: 0;
}

.panel::after {
    right: 2px;
    bottom: 2px;
    border-left: 0;
    border-top: 0;
}

/* opt out where a panel already has content in the corners */
.panel--plain::before,
.panel--plain::after {
    display: none;
}

/* ---------------- Scrollbars ---------------- */

* {
    scrollbar-width: thin;
    scrollbar-color: var(--rule) transparent;
}

::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--rule);
    border-radius: var(--r-sm);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--rule-strong);
}

/* ---------------- Utility ---------------- */

[hidden] {
    display: none !important;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
}