/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 40px 20px;
    background-color: white;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
}

/* Header Styles */
header {
    text-align: center;
    margin-bottom: 50px;
    padding: 20px 0;
}

.title {
    font-size: 2.5em;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 30px;
    line-height: 1.3;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

/* Authors Styles */
.authors {
    font-size: 1.1em;
    margin-bottom: 15px;
    line-height: 1.8;
}

.author-block {
    display: inline;
    margin: 0 5px;
}

.author-block a {
    color: #3498db;
    text-decoration: none;
    transition: color 0.3s ease;
}

.author-block a:hover {
    color: #2980b9;
    text-decoration: underline;
}

.author-block sup {
    margin-left: 2px;
}

/* Affiliations */
.affiliations {
    font-size: 1em;
    color: #666;
    margin-bottom: 25px;
    margin-top: 15px;
}

.affiliation-block {
    display: inline-block;
    line-height: 1.6;
}

.equal-contribution {
    margin-top: 10px;
    font-size: 0.9em;
    font-style: italic;
    color: #777;
}

/* Links/Buttons */
.links {
    margin-top: 30px;
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.button {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background-color: #3498db;
    color: white;
    text-decoration: none;
    border-radius: 5px;
    font-size: 1em;
    font-weight: 500;
    transition: background-color 0.3s ease, transform 0.2s ease;
}

.button:hover {
    background-color: #2980b9;
    transform: translateY(-2px);
}

.button i {
    font-size: 1.1em;
}

/* Teaser Section */
.teaser {
    margin: 50px 0;
    text-align: center;
}

.teaser-image {
    width: 100%;
    max-width: 1100px;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
}

.caption {
    text-align: justify;
    font-size: 0.95em;
    line-height: 1.7;
    color: #555;
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 20px;
}

.caption strong {
    color: #2c3e50;
}

/* Abstract and Sections */
section {
    margin: 50px 0;
}

section h2 {
    font-size: 2em;
    color: #2c3e50;
    margin-bottom: 20px;
    text-align: center;
    border-bottom: 3px solid #3498db;
    padding-bottom: 10px;
    display: inline-block;
    width: 100%;
}

.abstract p {
    font-size: 1.05em;
    line-height: 1.8;
    text-align: justify;
    color: #444;
    max-width: 900px;
    margin: 0 auto;
}

/* 3D Visualization Section */
.visualization {
    margin: 0px 0;
}

.visualization-container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
}

.viewer-row {
    display: flex;
    gap: 5px;
    align-items: flex-start;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 28px; /* space between rows */
}

/* Keep each visual+caption together as a tile */
.tile {
    width: var(--tile);
}

.tile-caption {
    text-align: center;
    color: #666;
    font-size: 0.85em;
    font-style: italic;
    line-height: 1.2;
    margin: 0;
}

/* Ensure the 3D canvas and result images fill the tile width */
.tile .scratchpad,
.tile .result-image {
    width: var(--tile);
    height: var(--tile);
}

.prompt {
    width: 100%;
    max-width: 1210px; /* ~ 4 tiles (4*300) + 3 gaps (3*5) */
    padding: 10px 12px;
    margin-bottom: 0px;
    background: #f6f8fa;
    border: 1px solid #e6e8eb;
    border-radius: 8px;
    color: #333;
    font-size: 0.95em;
    line-height: 1.5;
    white-space: pre-wrap;
}

/* Arrow below the prompt (inserted in DOM right after .prompt) */
.prompt-down-arrow {
    width: var(--tile);
    height: 80px; /* compact, avoids overlap */
    margin: -2px auto 0px;
    position: relative;
    flex: 0 0 100%;

    /* Anchor at the midpoint of the first 300px tile */
    padding-left: calc(var(--tile) / 2);
    box-sizing: border-box;
}

/* Thick vertical shaft */
.prompt-down-arrow::before {
    content: "";
    position: absolute;
    top: 0;
    left: calc(var(--tile) / 2);
    transform: translateX(-50%);
    width: 3px; /* thinner */
    height: calc(100% - 2px);
    background: #0b2a33;
    border-radius: 6px;
    z-index: 1;
}

/* Arrowhead (black) */
.prompt-down-arrow::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: calc(var(--tile) / 2);
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 8px solid transparent;
    border-right: 8px solid transparent;
    border-top: 12px solid #000;
    z-index: 3;
}

/* Circles + numbers */
.prompt-down-arrow .circle {
    position: absolute;
    left: calc(var(--tile) / 2);
    transform: translateX(-50%);
    width: 26px;  /* smaller */
    height: 26px;
    border-radius: 999px;
    background: #fff;
    border: 3px solid #0b2a33; /* thinner */
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 900;
    font-size: 17px; /* smaller */
    line-height: 1;
    color: #e11b22;
    z-index: 2;
}

.prompt-down-arrow .circle.circle-1 {
    top: 6px;
}

.prompt-down-arrow .circle.circle-2 {
    top: 36px; /* spaced so it doesn't collide with circle-1 */
}

/* The between-arrow sits in its own narrow column */
.between-arrow {
    width: var(--arrow-gap);
    height: var(--tile);
    position: relative;
    flex: 0 0 var(--arrow-gap);
}

/* Numbered circle on the between-arrow (matches prompt circles) */
.between-arrow .circle.circle-3 {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-60%, -50%);
    width: 26px;
    height: 26px;
    border-radius: 999px;
    background: #fff;
    border: 3px solid #0b2a33;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 900;
    font-size: 17px;
    line-height: 1;
    color: #e11b22;
    z-index: 4;
    pointer-events: none;
}

.scratchpad {
    width: var(--tile);
    height: var(--tile);
    /* Background is rendered by Three.js; keep container neutral */
    background: #f7fbff;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    position: relative;
    display: block;
}

/* Per-viewer interaction hint under each scratchpad */
.scratchpad-controls {
    width: var(--tile);
    text-align: center;
    color: #666;
    font-size: 0.85em;
    font-style: italic;
    margin-top: 4px;
    margin-bottom: 2px;
}

.visualization-controls {
    display: none;
}

.scratchpad canvas {
    display: block;
    width: 100% !important;
    height: 100% !important;
}

.result-image {
    width: var(--tile);
    height: var(--tile);
    object-fit: cover;
    background: #f7fbff;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    display: block;
}

.visualization-controls {
    text-align: center;
    margin-top: 5px; /* separate from last row */
    color: #666;
    font-size: 0.9em;
}

.visualization-controls p {
    margin: 0;
    font-style: italic;
}

:root {
    --tile: 300px;
    --gap: 5px;
    --arrow-gap: 40px; /* dedicated space between scratchpads */
    --arrow-gap-2: 40px; /* dedicated space between agent2 and rendered */
    --arrow-gap-3: 40px; /* dedicated space between rendered and generated */
}

@media (max-width: 900px) {
    #canvas-container {
        height: 520px;
    }
}

/* Footer */
footer {
    text-align: center;
    padding: 30px 20px;
    background-color: #2c3e50;
    color: white;
    margin-top: 50px;
}

footer p {
    font-size: 0.9em;
}

/* Responsive Design */
@media (max-width: 768px) {
    .title {
        font-size: 1.8em;
    }

    .authors {
        font-size: 1em;
    }

    .links {
        flex-direction: column;
        align-items: center;
    }

    .button {
        width: 80%;
        justify-content: center;
    }

    .caption {
        text-align: left;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 20px 10px;
    }

    .title {
        font-size: 1.5em;
    }

    .authors {
        font-size: 0.9em;
    }

    section h2 {
        font-size: 1.5em;
    }
}

/* Scratchpad pair + between-arrow column */
.scratchpad-pair {
    display: flex;
    align-items: flex-start;
    gap: var(--gap);
}

/* The between-arrow sits in its own narrow column */
.between-arrow {
    width: var(--arrow-gap);
    height: var(--tile);
    position: relative;
    flex: 0 0 var(--arrow-gap);
}

.between-arrow::before {
    content: "";
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);

    /* horizontal thin shaft */
    width: calc(var(--arrow-gap) - 0px);
    height: 3px;
    background: #0b2a33;
    border-radius: 999px;
}

.between-arrow::after {
    content: "";
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(calc(-50% + (var(--arrow-gap) / 2) - 0px), -50%);

    /* arrow head pointing right */
    width: 0;
    height: 0;
    border-left: 12px solid #000;
    border-top: 8px solid transparent;
    border-bottom: 8px solid transparent;
}

/* Pair between scratchpad #2 and rendered tile */
.agent2-render-pair {
    display: flex;
    align-items: flex-start;
    gap: var(--gap);
}

.between-arrow-2 {
    width: var(--arrow-gap-2);
    height: var(--tile);
    position: relative;
    flex: 0 0 var(--arrow-gap-2);
}

/* Numbered circle on the between-arrow-2 (matches prompt circles) */
.between-arrow-2 .circle.circle-4 {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-60%, -50%);
    width: 26px;
    height: 26px;
    border-radius: 999px;
    background: #fff;
    border: 3px solid #0b2a33;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 900;
    font-size: 17px;
    line-height: 1;
    color: #e11b22;
    z-index: 4;
    pointer-events: none;
}

.between-arrow-2::before {
    content: "";
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);

    width: calc(var(--arrow-gap-2) - 0px);
    height: 3px;
    background: #0b2a33;
    border-radius: 999px;
}

.between-arrow-2::after {
    content: "";
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(calc(-50% + (var(--arrow-gap-2) / 2) - 0px), -50%);

    width: 0;
    height: 0;
    border-left: 12px solid #000;
    border-top: 8px solid transparent;
    border-bottom: 8px solid transparent;
}

/* Pair between rendered tile and generated tile */
.render-gen-pair {
    display: flex;
    align-items: flex-start;
    gap: var(--gap);
}

.between-arrow-3 {
    width: var(--arrow-gap-3);
    height: var(--tile);
    position: relative;
    flex: 0 0 var(--arrow-gap-3);
}

.between-arrow-3::before {
    content: "";
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);

    width: calc(var(--arrow-gap-3) - 0px);
    height: 3px;
    background: #0b2a33;
    border-radius: 999px;
}

.between-arrow-3::after {
    content: "";
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(calc(-50% + (var(--arrow-gap-3) / 2) - 0px), -50%);

    width: 0;
    height: 0;
    border-left: 12px solid #000;
    border-top: 8px solid transparent;
    border-bottom: 8px solid transparent;
}

/* Method Section */
.method {
    margin: 50px 0;
}

.method-figure {
    margin: 0 auto;
    text-align: center;
}

.method-image {
    width: 100%;
    max-width: 1100px;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    display: block;
    margin: 0 auto 14px;
}

.method-caption {
    text-align: justify;
    font-size: 0.95em;
    line-height: 1.7;
    color: #555;
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 20px;
}

/* LaTeX-like circled numbers used in method text */
.mcircle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.35em;
    height: 1.35em;
    border-radius: 999px;
    background: #fff;
    border: 2px solid #0b2a33;
    color: #e11b22;
    font-weight: 800;
    font-size: 0.95em;
    line-height: 1;
    vertical-align: text-bottom;
    margin: 0 0.1em;
}

/* Consistent Editability Section */
.editability {
    margin: 50px 0;
}

.editability-figure {
    margin: 0 auto;
    text-align: center;
}

.editability-image {
    width: 100%;
    max-width: 1100px;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    display: block;
    margin: 0 auto 14px;
}

.editability-caption {
    text-align: justify;
    font-size: 0.95em;
    line-height: 1.7;
    color: #555;
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 20px;
}

.more-examples-link {
    display: flex;
    justify-content: center;
    margin-top: 14px;
}

.more-examples-link .button {
    padding: 16px 34px;
    font-size: 1.12em;
    font-weight: 800;
    border-radius: 999px;

    background: linear-gradient(135deg, #ff4d4d 0%, #ff8a00 45%, #ffd43b 100%);
    box-shadow: 0 14px 28px rgba(255, 138, 0, 0.25), 0 6px 14px rgba(255, 77, 77, 0.20);

    letter-spacing: 0.2px;
    transform: translateZ(0);
    position: relative;
    overflow: hidden;
}

.more-examples-link .button::before {
    content: "";
    position: absolute;
    inset: -2px;
    background: radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.60), rgba(255, 255, 255, 0) 55%);
    opacity: 0.55;
    pointer-events: none;
}

.more-examples-link .button:hover {
    background: linear-gradient(135deg, #ff3b3b 0%, #ff7a00 45%, #ffd000 100%);
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 18px 36px rgba(255, 138, 0, 0.32), 0 10px 18px rgba(255, 77, 77, 0.22);
}

.more-examples-link .button i {
    font-size: 1.2em;
}

@keyframes moreExamplesPulse {
    0%, 100% { filter: drop-shadow(0 0 0 rgba(255, 138, 0, 0.0)); }
    50% { filter: drop-shadow(0 0 12px rgba(255, 138, 0, 0.45)); }
}

.more-examples-link .button {
    animation: moreExamplesPulse 2.4s ease-in-out infinite;
}

@media (prefers-reduced-motion: reduce) {
    
/* Loading Spinner */
.viewer-spinner {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 40px;
    height: 40px;
    border: 4px solid rgba(0, 0, 0, 0.1);
    border-left-color: #3498db;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    z-index: 5;
    pointer-events: none;
}

@keyframes spin {
    0% { transform: translate(-50%, -50%) rotate(0deg); }
    100% { transform: translate(-50%, -50%) rotate(360deg); }
}


/* Interaction Hint Overlay */
.interaction-hint {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    pointer-events: none;
    opacity: 1;
    transition: opacity 0.3s ease;
    z-index: 1000;
}

.interaction-hint.fade-out {
    opacity: 0;
}

.hint-icon-container {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(8px);
    width: 80px;
    height: 80px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2), inset 0 1px 0 rgba(255, 255, 255, 0.8);
    animation: pulse-shadow 2s infinite;
    border: 2px solid rgba(255, 255, 255, 0.5);
    flex-shrink: 0;
}

.hint-icon-container i,
.hint-icon-container svg {
    animation: hand-wiggle 2s ease-in-out infinite;
}

@keyframes pulse-shadow {
    0% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(255, 255, 255, 0.7);
    }
    70% {
        transform: scale(1.05);
        box-shadow: 0 0 0 10px rgba(255, 255, 255, 0);
    }
    100% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(255, 255, 255, 0);
    }
}

@keyframes hand-wiggle {
    0%, 100% { transform: rotate(0deg) scale(1); }
    25% { transform: rotate(-15deg) scale(1.1); }
    75% { transform: rotate(15deg) scale(1.1); }
}