@font-face {
    font-family: "Linux Biolinum";
    src: url("./fonts/linbiolinum_r-webfont.woff") format("woff");
    font-weight: 400;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: "Linux Biolinum";
    src: url("./fonts/linbiolinum_rb-webfont.woff") format("woff");
    font-weight: 700;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: "Linux Biolinum";
    src: url("./fonts/linbiolinum_ri-webfont.woff") format("woff");
    font-weight: 400;
    font-style: italic;
    font-display: swap;
}

:root {
    --page-bg: #ffffff;
    --text: #111111;
    --muted: #4f4f4f;
    --rule: #d8d8d8;
    --panel-bg: #fafafa;
    --button-border: #222222;
    --button-bg: #ffffff;
    --button-hover-bg: #111111;
    --button-hover-text: #ffffff;
    --toggle-bg: #d8d8d8;
    --toggle-knob: #ffffff;

    --page-width: 1580px;
    --page-pad: clamp(12px, 2vw, 32px);
    --card-pad: clamp(14px, 2vw, 24px);
    --gap: clamp(12px, 2vw, 24px);
    --radius: 18px;
}

body.dark-mode {
    --page-bg: #101010;
    --text: #f2f2f2;
    --muted: #b8b8b8;
    --rule: #3a3a3a;
    --panel-bg: #171717;
    --button-border: #eeeeee;
    --button-bg: #101010;
    --button-hover-bg: #f2f2f2;
    --button-hover-text: #101010;
    --toggle-bg: #555555;
    --toggle-knob: #f2f2f2;
}

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

html {
    width: 100%;
    overflow-x: hidden;
}

body {
    width: 100%;
    margin: 0;
    min-height: 100vh;
    overflow-x: hidden;
    background: var(--page-bg);
    color: var(--text);
    font-family: "Linux Biolinum", Georgia, serif;
    line-height: 1.35;
    transition: background 180ms ease, color 180ms ease;
}

img,
video,
svg,
canvas {
    max-width: 100%;
}

img,
video {
    height: auto;
}

button,
input,
audio {
    max-width: 100%;
}

/* Theme toggle */

.theme-control {
    position: fixed;
    top: 22px;
    right: 24px;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--muted);
    font-size: 1rem;
    z-index: 10;
}

.theme-toggle {
    position: relative;
    display: inline-flex;
    width: 56px;
    height: 30px;
    flex: 0 0 auto;
}

.theme-toggle input {
    opacity: 0;
    width: 0;
    height: 0;
}

.theme-slider {
    position: absolute;
    inset: 0;
    border-radius: 999px;
    background: var(--toggle-bg);
    cursor: pointer;
    transition: background 180ms ease;
}

.theme-slider::before {
    content: "";
    position: absolute;
    width: 24px;
    height: 24px;
    left: 3px;
    top: 3px;
    border-radius: 50%;
    background: var(--toggle-knob);
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.25);
    transition: transform 180ms ease;
}

.theme-toggle input:checked+.theme-slider::before {
    transform: translateX(26px);
}

/* Main page */

main {
    width: min(var(--page-width), calc(100% - 2 * var(--page-pad)));
    margin: 0 auto;
    padding: clamp(28px, 4vw, 44px) 0;
    text-align: center;
}

.hero {
    margin-bottom: 18px;
}

.paper-title {
    max-width: 100%;
    margin: 0;
    font-size: clamp(1.55rem, 3vw, 3.2rem);
    font-weight: 400;
    line-height: 1.08;
    letter-spacing: -0.02em;
    text-wrap: balance;
}

.submission-id {
    margin-top: 14px;
    padding-top: 10px;
    border-top: 1px solid var(--rule);
    color: var(--muted);
    font-size: clamp(1.05rem, 2vw, 1.45rem);
    letter-spacing: 0.015em;
}

/* Navigation buttons */

.button-row {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
    margin-top: 18px;
    padding-bottom: 6px;
}

.figure-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 34px;
    padding: 6px 10px;
    border: 1.2px solid var(--button-border);
    border-radius: 999px;
    background: var(--button-bg);
    color: var(--text);
    font-family: "Linux Biolinum", Georgia, serif;
    font-size: clamp(0.78rem, 1vw, 0.92rem);
    line-height: 1.1;
    white-space: nowrap;
    text-decoration: none;
    cursor: pointer;
    transition:
        background 160ms ease,
        color 160ms ease,
        transform 160ms ease;
}

.figure-button:hover,
.figure-button:focus-visible,
.figure-button.active {
    background: var(--button-hover-bg);
    color: var(--button-hover-text);
    transform: translateY(-1px);
}

.figure-button:focus-visible,
.theme-toggle input:focus-visible+.theme-slider {
    outline: 2px solid var(--text);
    outline-offset: 3px;
}

/* Subpages */

.page-content {
    width: 100%;
    text-align: left;
}

.subpage {
    display: none;
    width: 100%;
    padding: var(--card-pad);
    border: 1px solid var(--rule);
    border-radius: var(--radius);
    background: var(--panel-bg);
}

.subpage.active {
    display: block;
}

.subpage h2 {
    margin: 0 0 14px;
    font-size: clamp(1.7rem, 3vw, 2.5rem);
    font-weight: 400;
    line-height: 1.1;
    letter-spacing: -0.02em;
}

.subpage p {
    margin: 0;
    color: var(--muted);
    font-size: clamp(1rem, 1.4vw, 1.2rem);
}

/* General figure styles */

.vm-figure,
.audio-figure,
.results-row figure {
    min-width: 0;
    margin: 0;
    text-align: center;
}

.vm-figure img,
.audio-figure img,
.results-row img {
    display: block;
    width: 100%;
    object-fit: contain;
    border: 1px solid var(--rule);
    border-radius: 14px;
    background: #ffffff;
    padding: 8px;
}

.vm-figure figcaption,
.audio-figure figcaption,
.results-row figcaption {
    margin-top: 6px;
    color: var(--muted);
    font-size: clamp(0.88rem, 1vw, 0.98rem);
}

/* Videos */

.section-video {
    display: block;
    width: min(100%, 960px);
    max-height: min(62vh, 620px);
    margin: 18px auto 0;
    border-radius: 14px;
    border: 1px solid var(--rule);
    background: #000000;
    object-fit: contain;
}

/* Visual microphone section */

.visual-mic-top {
    display: grid;
    grid-template-columns: minmax(220px, 0.65fr) minmax(0, 1.75fr);
    gap: var(--gap);
    align-items: center;
    width: 100%;
}

.tuning-fork-panel img {
    height: clamp(160px, 18vw, 225px);
}

.result-panel img {
    height: clamp(190px, 24vw, 285px);
}

/* Optical velocimetry section */

#optical-velocimetry h2 {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: 0.9rem;
    flex-wrap: wrap;
    text-align: left;
}

.title-note {
    display: inline-flex;
    align-items: center;
    max-width: 100%;
    margin-left: 0.75rem;
    padding: 0.25em 0.65em;
    border-radius: 999px;
    background: rgba(0, 119, 255, 0.12);
    color: #0057ff;
    font-size: clamp(0.78rem, 1.2vw, 1rem);
    font-weight: 700;
    line-height: 1.25;
    letter-spacing: 0;
}

.results-row {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 1fr) 2px minmax(0, 1fr);
    gap: var(--gap);
    align-items: stretch;
    width: 100%;
}

.results-row figure:first-child {
    grid-column: 1;
}

.results-row figure:last-child {
    grid-column: 3;
}

.results-row::before {
    content: "";
    grid-column: 2;
    grid-row: 1;
    width: 2px;
    height: 100%;
    background: var(--rule);
    border-radius: 999px;
}

.results-row img {
    height: clamp(220px, 34vw, 520px);
}

/* Explanation blocks */

.vm-explanation {
    max-width: 100%;
    margin: 8px auto 0;
    padding: 7px 12px;
    border: 1px solid var(--rule);
    border-radius: 12px;
    background: var(--page-bg);
    text-align: center;
}

.vm-explanation p {
    margin: 0;
    color: var(--text);
    font-size: clamp(0.9rem, 1.1vw, 0.98rem);
    line-height: 1.25;
}

.vm-explanation p+p {
    margin-top: 4px;
}

.section-divider {
    margin: 18px 0;
    border: 0;
    border-top: 1px solid var(--rule);
}

/* Audio comparison section */

.audio-comparison-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--gap);
    width: 100%;
}

.audio-demo-card {
    display: grid;
    grid-template-columns: minmax(120px, 160px) minmax(0, 1fr);
    gap: 14px;
    align-items: start;
    min-width: 0;
    padding: 14px;
    border: 1px solid var(--rule);
    border-radius: 16px;
    background: var(--page-bg);
}

.audio-figure img {
    height: clamp(135px, 15vw, 190px);
}

.compact-audio-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    min-width: 0;
}

.audio-item.compact {
    min-width: 0;
    padding: 8px;
    border: 1px solid var(--rule);
    border-radius: 12px;
    background: var(--panel-bg);
}

.audio-label {
    margin-bottom: 5px;
    color: var(--text);
    font-size: clamp(0.8rem, 1vw, 0.88rem);
    line-height: 1.15;
}

.audio-item audio {
    width: 100%;
    height: 32px;
}

/* Mini audio controls */

.mini-audio {
    display: grid;
    grid-template-columns: 50px minmax(0, 1fr);
    gap: 8px;
    align-items: center;
    min-width: 0;
}

.mini-play {
    height: 28px;
    border: 1px solid var(--button-border);
    border-radius: 999px;
    background: var(--button-bg);
    color: var(--text);
    font-family: "Linux Biolinum", Georgia, serif;
    font-size: 0.8rem;
    line-height: 1;
    cursor: pointer;
}

.mini-play:hover,
.mini-play:focus-visible {
    background: var(--button-hover-bg);
    color: var(--button-hover-text);
}

.mini-progress {
    width: 100%;
    max-width: 150px;
    accent-color: var(--text);
}

/* Anonymous code */

.anonymous-code-inline {
    margin-left: 18px;
    color: var(--muted);
    font-size: 0.95em;
}

.anonymous-code-inline a {
    color: var(--text);
    text-decoration: none;
    border-bottom: 1px solid var(--muted);
}

.anonymous-code-inline a:hover,
.anonymous-code-inline a:focus-visible {
    border-bottom-color: var(--text);
}

/* Tablet */

@media (max-width: 1100px) {
    .visual-mic-top {
        grid-template-columns: 1fr;
    }

    .audio-comparison-grid {
        grid-template-columns: 1fr;
    }

    .tuning-fork-panel img,
    .result-panel img {
        height: auto;
        max-height: 360px;
    }
}

/* Mobile */

@media (max-width: 900px) {
    .theme-control {
        position: static;
        justify-content: center;
        margin-top: 22px;
    }

    main {
        width: min(100% - 20px, var(--page-width));
        padding-top: 28px;
    }

    .button-row {
        justify-content: flex-start;
        flex-wrap: nowrap;
        overflow-x: auto;
        scrollbar-width: thin;
    }

    .subpage {
        padding: 14px;
        border-radius: 14px;
    }

    #optical-velocimetry h2 {
        justify-content: center;
        text-align: center;
    }
}

@media (max-width: 700px) {
    .results-row {
        grid-template-columns: 1fr;
        gap: 1.2rem;
    }

    .results-row figure:first-child,
    .results-row figure:last-child {
        grid-column: 1;
    }

    .results-row::before {
        display: none;
    }

    .results-row img {
        height: clamp(220px, 70vw, 380px);
    }

    .audio-demo-card {
        grid-template-columns: 1fr;
    }

    .compact-audio-grid {
        grid-template-columns: 1fr;
    }

    .audio-figure img {
        height: clamp(130px, 45vw, 210px);
    }

    .anonymous-code-inline {
        display: block;
        margin: 8px 0 0;
    }
}

@media (max-width: 480px) {
    main {
        width: calc(100% - 14px);
    }

    .subpage {
        padding: 12px;
    }

    .paper-title {
        font-size: clamp(1.35rem, 8vw, 1.8rem);
    }

    .submission-id {
        font-size: 1rem;
    }

    .title-note {
        border-radius: 12px;
        text-align: center;
    }
}


.static-scan-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 2px minmax(0, 1fr);
    gap: var(--gap);
    align-items: stretch;
    width: 100%;
}

.static-scan-divider {
    width: 2px;
    height: 100%;
    background: var(--rule);
    border-radius: 999px;
}

.static-scene {
    min-width: 0;
}

.static-scene h3 {
    margin: 0 0 10px;
    text-align: center;
    font-size: clamp(1.2rem, 1.6vw, 1.55rem);
    font-weight: 700;
}

.static-scene-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: clamp(8px, 1vw, 14px);
    align-items: start;
}

.static-scene figure {
    min-width: 0;
    margin: 0;
    text-align: center;
}

.static-scene img,
.ply-viewer {
    width: 100%;
    height: clamp(150px, 15vw, 260px);
    border: 1px solid var(--rule);
    border-radius: 14px;
    background: #ffffff;
    object-fit: contain;
    overflow: hidden;
}

.static-scene img {
    display: block;
    padding: 6px;
}

.static-scene figcaption {
    margin-top: 6px;
    color: var(--text);
    font-size: clamp(0.82rem, 1vw, 0.95rem);
    line-height: 1.15;
}

.static-scene figcaption span {
    color: var(--muted);
    font-size: 0.88em;
}

@media (max-width: 1100px) {
    .static-scan-row {
        grid-template-columns: 1fr;
    }

    .static-scan-divider {
        display: none;
    }
}

@media (max-width: 700px) {
    .static-scene-grid {
        grid-template-columns: 1fr;
    }

    .static-scene img,
    .ply-viewer {
        height: clamp(220px, 70vw, 380px);
    }
}

.server-note {
    display: flex;
    align-items: center;
    justify-content: center;
    width: fit-content;
    max-width: 100%;
    margin: 0 auto 1rem;
    padding: 0.35em 0.85em;
    border-radius: 999px;
    background: rgba(220, 38, 38, 0.12);
    color: #b91c1c;
    font-size: clamp(0.78rem, 1.2vw, 1rem);
    font-weight: 700;
    line-height: 1.3;
    text-align: center;
}

.server-note code {
    color: #7f1d1d;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    font-size: 0.92em;
}

.interactive-note {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: fit-content;
    max-width: 100%;
    min-height: 28px;
    margin: 0 auto 0.5rem;
    padding: 0.25em 0.65em;
    border-radius: 999px;
    background: rgba(34, 197, 94, 0.14);
    color: #15803d;
    font-size: clamp(0.78rem, 1.2vw, 1rem);
    font-weight: 700;
    line-height: 1.25;
    letter-spacing: 0;
    text-align: center;
}

.placeholder-note {
    visibility: hidden;
}

.dynamic-scans-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 1.25rem;
    align-items: start;
    margin-top: 1.25rem;
}

.dynamic-panel {
    border: 1px solid rgba(120, 120, 120, 0.25);
    border-radius: 18px;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.65);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.06);
}

body.dark-mode .dynamic-panel,
.dark-mode .dynamic-panel {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.14);
}

.dynamic-panel-heading {
    margin-bottom: 0.85rem;
    font-size: 0.95rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    opacity: 0.75;
    text-align: center;
}

.dynamic-media-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.9rem;
    align-items: start;
}

.dynamic-video-stack {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.9rem;
    align-items: start;
}

.dynamic-media-card {
    margin: 0;
    min-width: 0;
}

.dynamic-media-card video,
.dynamic-media-card img,
.dynamic-placeholder {
    width: 100%;
    height: 320px;
    max-height: 320px;
    display: block;
    border-radius: 12px;
    overflow: hidden;
    background: #111111;
    border: 1px solid rgba(120, 120, 120, 0.25);
    object-fit: contain;
}

.dynamic-media-card video {
    object-fit: contain;
    background: #000000;
}

.dynamic-media-card img {
    object-fit: contain;
    background: #ffffff;
}

.tall-scan img {
    height: 320px;
    max-height: 320px;
    object-fit: contain;
    background: #ffffff;
}

.dynamic-media-card.wide video {
    height: 320px;
    max-height: 320px;
    object-fit: contain;
}

.dynamic-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1.5px dashed rgba(120, 120, 120, 0.55);
    background:
        linear-gradient(135deg, rgba(128, 128, 128, 0.12), rgba(128, 128, 128, 0.04));
    color: rgba(80, 80, 80, 0.78);
    font-size: 0.9rem;
    font-weight: 600;
    text-align: center;
    padding: 1rem;
}

body.dark-mode .dynamic-placeholder {
    color: rgba(255, 255, 255, 0.78);
    border-color: rgba(255, 255, 255, 0.32);
    background:
        linear-gradient(135deg, rgba(255, 255, 255, 0.10), rgba(255, 255, 255, 0.03));
}

.dynamic-media-card figcaption {
    margin-top: 0.45rem;
    text-align: center;
    font-size: 0.9rem;
    color: var(--muted, #666666);
    opacity: 0.78;
}

@media (max-width: 900px) {
    .dynamic-scans-layout {
        grid-template-columns: 1fr;
    }

    .dynamic-media-row {
        grid-template-columns: 1fr;
    }

    .dynamic-media-card video,
    .dynamic-media-card img,
    .dynamic-media-card.wide video,
    .tall-scan img {
        height: auto;
        max-height: 360px;
    }
}

@media (max-width: 600px) {

    .dynamic-media-row,
    .dynamic-video-stack {
        grid-template-columns: 1fr;
    }
}

/* Make only the 1D scan side larger */
.dynamic-panel-left {
    align-self: stretch;
}

.dynamic-panel-left .dynamic-media-row {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: stretch;
}

.dynamic-panel-left .dynamic-media-card video,
.dynamic-panel-left .dynamic-media-card img {
    height: 520px;
    max-height: none;
}

.dynamic-panel-left .tall-scan img {
    object-fit: contain;
    background: #ffffff;
}