@import url("https://fonts.googleapis.com/css2?family=Special+Elite&display=swap");

:root {
    color-scheme: dark;
    background: #000;
    color: #b0b0b0;
    font-family: "Special Elite", monospace;
    letter-spacing: 0.2em;
}

body {
    margin: 0;
    padding-top: 2rem;
    background: #000;
    filter: grayscale(1);
}

main,
.az-unlock {
    width: min(100% - 2rem, 34rem);
    margin-inline: auto;
}

main img,
main canvas {
    display: block;
    max-width: 100%;
    height: auto;
}

.az-field {
    position: relative;
    display: inline-block;
    padding: 8px;
}

.az-sketch {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    overflow: visible;
    z-index: 0;
}

.az-sketch-hover {
    opacity: 0;
}

.az-field:has(button:focus-visible) .az-sketch-hover,
.az-field:has(button:active) .az-sketch-hover {
    opacity: 1;
}

.az-field:has(button:focus-visible) .az-sketch-normal,
.az-field:has(button:active) .az-sketch-normal {
    opacity: 0;
}

@media (hover: hover) {
    .az-field:has(button:hover) .az-sketch-hover {
        opacity: 1;
    }

    .az-field:has(button:hover) .az-sketch-normal {
        opacity: 0;
    }
}

.az-unlock input,
.az-unlock button {
    position: relative;
    z-index: 1;
    display: block;
    box-sizing: border-box;
    appearance: none;
    -webkit-appearance: none;
    border: none;
    border-radius: 0;
    outline: none;
    background: transparent;
    color: #b0b0b0;
    font: inherit;
    letter-spacing: inherit;
}

.az-unlock input {
    padding: 0.5rem 0.65rem;
}

.az-unlock button {
    padding: 0.5rem 0.9rem;
    cursor: pointer;
}

.az-unlock button:focus-visible,
.az-unlock button:active {
    background: #b0b0b0;
    color: #000;
}

@media (hover: hover) {
    .az-unlock button:hover {
        background: #b0b0b0;
        color: #000;
    }
}

/* --- page furniture -------------------------------------------------------
   Everything below is deliberately plain: the typewriter face, the grayscale
   filter and the hand-drawn field borders do the work, so these rules only
   set rhythm and hierarchy. */

main {
    padding-bottom: 6rem;
    line-height: 1.7;
}

.letter,
.clipping,
.decision,
.puzzle,
.address {
    margin-block: 2.5rem;
}

.letter p {
    text-indent: 0;
}

.sign {
    margin-left: 55%;
}

.decision ol {
    padding-left: 1.5rem;
}

.decision li {
    margin-block: 1rem;
}

.address {
    text-align: center;
}

.address .code {
    font-size: 1.6rem;
    letter-spacing: 0.5em;
    text-indent: 0.5em;
}

.clipping {
    border-block: 1px solid #4a4a4a;
    padding-block: 1.5rem;
    text-align: justify;
}

.clipping p:first-child {
    font-size: 1.25rem;
    text-align: center;
    line-height: 1.3;
}

.clipping img {
    margin: 1.5rem auto;
}

.ending {
    display: block;
    margin: 3rem auto 0;
}

.puzzle {
    border-left: 1px solid #4a4a4a;
    padding-left: 1.25rem;
}

.puzzle pre {
    font: inherit;
    letter-spacing: inherit;
    white-space: pre-wrap;
    line-height: 1.4;
}

.cipher-word {
    text-align: center;
    font-size: 1.4rem;
    letter-spacing: 0.6em;
    text-indent: 0.6em;
}

.grid-table {
    margin: 1.5rem auto;
    border-collapse: collapse;
}

.grid-table td {
    width: 2.4rem;
    height: 2.4rem;
    text-align: center;
    border: 1px solid #4a4a4a;
    font-variant-numeric: tabular-nums;
}

/* The first clue is a wall of digits; let it break anywhere. */
.cipher {
    word-break: break-all;
    line-height: 1.9;
}

.onward {
    margin-top: 3.5rem;
    text-align: center;
}

a {
    color: inherit;
    text-underline-offset: 0.3em;
    text-decoration-thickness: 1px;
}

/* Special Elite ships one weight only, so <strong> has no real bold to fall
   back on -- underline reads as emphasis instead. */
strong {
    font-weight: inherit;
    text-decoration: underline;
    text-underline-offset: 0.3em;
    text-decoration-thickness: 1px;
}

a:hover,
a:focus-visible {
    background: #b0b0b0;
    color: #000;
}