/* TransMov animated image viewer — shared styles */
:root {
    --bg: #07080d;
    --card: #11131b;
    --text: #f5f5f7;
    --muted: #9aa1b2;
    --line: rgba(255, 255, 255, 0.12);
    --accent: #6366f1;
    --accent-soft: #818cf8;
    --accent-link: #a5b4fc;
    --accent-link-hover: #c7d2fe;
    --content-max: 1160px;
}

* {
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg);
    color: var(--text);
    overflow-x: hidden;
    padding-top: 5.6rem;
    position: relative;
    min-height: 100vh;
}

body::before {
    content: "";
    position: fixed;
    left: 0;
    right: 0;
    top: 0;
    width: 100%;
    height: 100vh;
    min-height: 100svh;
    z-index: 0;
    pointer-events: none;
    background-image:
        radial-gradient(ellipse 130% 82% at 50% 0%, rgba(99, 102, 241, 0.28) 0%, transparent 56%),
        radial-gradient(ellipse 98% 58% at 50% 14%, rgba(59, 130, 246, 0.13) 0%, transparent 52%),
        radial-gradient(ellipse 85% 48% at 50% 40%, rgba(37, 99, 235, 0.06) 0%, transparent 64%);
    background-repeat: no-repeat;
    background-size: 100% 100%;
}

body > * {
    position: relative;
    z-index: 1;
}

a {
    color: var(--accent-link);
    text-decoration: none;
}

a:hover {
    color: var(--accent-link-hover);
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* --- Top bar (minimal) --- */
.viewer-top-bar {
    position: fixed;
    top: 14px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 100;
    width: min(96vw, var(--content-max));
    min-height: 56px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    padding: 0.45rem 1.25rem;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(7, 8, 13, 0.54);
    -webkit-backdrop-filter: blur(12px) saturate(1.1);
    backdrop-filter: blur(12px) saturate(1.1);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08), 0 10px 36px rgba(3, 6, 20, 0.35);
}

.viewer-top-bar-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: inherit;
    flex-shrink: 0;
}

.viewer-top-bar-icon {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    display: block;
}

.viewer-top-bar-name {
    font-size: 1.1rem;
    font-weight: 600;
    color: #f5f5f5;
    letter-spacing: -0.01em;
}

.viewer-format-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.15rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

.viewer-format-nav a {
    text-decoration: none;
    font-size: 0.82rem;
    color: rgba(255, 255, 255, 0.72);
    font-weight: 550;
    white-space: nowrap;
    display: inline-flex;
    align-items: center;
    min-height: 32px;
    padding: 0 0.65rem;
    border-radius: 999px;
    transition: color 0.2s ease, background 0.2s ease;
}

.viewer-format-nav a:hover {
    color: rgba(255, 255, 255, 0.98);
    background: rgba(255, 255, 255, 0.06);
}

.viewer-format-nav a.is-active {
    color: #fff;
    background: rgba(99, 102, 241, 0.35);
    border: 1px solid rgba(199, 210, 254, 0.35);
}

.viewer-top-bar-cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 0.82rem;
    font-weight: 600;
    color: #fff !important;
    background: rgba(99, 102, 241, 0.9);
    border: 1px solid rgba(199, 210, 254, 0.5);
    min-height: 32px;
    padding: 0 0.85rem;
    border-radius: 999px;
    text-decoration: none;
    transition: background 0.2s ease;
}

.viewer-top-bar-cta:hover {
    background: rgba(99, 102, 241, 1);
    color: #fff !important;
}

/* --- Layout --- */
.viewer-main {
    width: min(96vw, var(--content-max));
    margin: 0 auto;
    padding: 1.5rem 0 4rem;
}

.viewer-hero {
    text-align: center;
    margin-bottom: 2.5rem;
}

.viewer-hero h1 {
    font-size: clamp(1.85rem, 4.5vw, 2.75rem);
    font-weight: 800;
    letter-spacing: -0.04em;
    line-height: 1.15;
    margin: 0 0 0.85rem;
}

.viewer-hero-lead {
    color: var(--muted);
    font-size: clamp(1rem, 2.2vw, 1.15rem);
    line-height: 1.55;
    max-width: 36rem;
    margin: 0 auto 1.75rem;
}

.viewer-privacy {
    color: rgba(154, 161, 178, 0.95);
    font-size: 0.88rem;
    margin: 1rem 0 0;
}

/* --- Dropzone / stage --- */
.viewer-panel {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 24px;
    overflow: hidden;
    text-align: left;
}

.viewer-dropzone {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    min-height: min(52vh, 420px);
    padding: 2.5rem 1.5rem;
    border: 2px dashed rgba(255, 255, 255, 0.14);
    border-radius: 22px;
    margin: 0.75rem;
    cursor: pointer;
    transition: border-color 0.2s ease, background 0.2s ease;
}

.viewer-dropzone:hover,
.viewer-dropzone.is-dragover {
    border-color: rgba(129, 140, 248, 0.65);
    background: rgba(99, 102, 241, 0.06);
}

.viewer-dropzone-title {
    font-size: 1.2rem;
    font-weight: 650;
    margin: 0;
}

.viewer-dropzone-hint {
    color: var(--muted);
    font-size: 0.95rem;
    margin: 0;
    text-align: center;
    max-width: 28rem;
}

.viewer-dropzone-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 42px;
    padding: 0 1.25rem;
    border-radius: 12px;
    border: 1px solid rgba(199, 210, 254, 0.45);
    background: rgba(99, 102, 241, 0.85);
    color: #fff;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
}

.viewer-dropzone-btn:hover {
    background: var(--accent-soft);
}

.viewer-sample-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 0.55rem;
    margin-top: 0.15rem;
}

.viewer-sample-chip {
    display: inline-flex;
    align-items: center;
    min-height: auto;
    padding: 0.2rem 0.15rem;
    border: none;
    border-radius: 0;
    background: transparent;
    color: rgba(154, 161, 178, 0.95);
    font-size: 0.84rem;
    font-weight: 500;
    cursor: pointer;
    text-decoration: underline;
    text-decoration-color: rgba(154, 161, 178, 0.35);
    text-underline-offset: 0.18em;
    transition: color 0.2s ease, text-decoration-color 0.2s ease;
}

.viewer-sample-chip:hover {
    background: transparent;
    color: var(--accent-link);
    text-decoration-color: rgba(165, 180, 252, 0.65);
}

.viewer-sample-chip:focus-visible {
    outline: 2px solid rgba(199, 210, 254, 0.75);
    outline-offset: 3px;
    border-radius: 4px;
}

.viewer-sibling-hint {
    font-size: 0.82rem;
    color: var(--muted);
    margin: 0.25rem 0 0;
}

.viewer-sibling-hint a {
    font-weight: 600;
}

.viewer-file-input {
    position: absolute;
    width: 1px;
    height: 1px;
    opacity: 0;
    pointer-events: none;
}

/* Active preview */
.viewer-active {
    display: none;
}

.viewer-active.is-visible {
    display: block;
}

.viewer-dropzone.is-hidden {
    display: none;
}

.viewer-stage-wrap {
    --viewer-stage-h: min(52vh, 480px);
    position: relative;
    height: var(--viewer-stage-h);
    min-height: 280px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: auto;
    background: #0a0b10;
}

.viewer-stage-wrap.bg-checker {
    background-color: #1a1b22;
    background-image:
        linear-gradient(45deg, #2a2b33 25%, transparent 25%),
        linear-gradient(-45deg, #2a2b33 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #2a2b33 75%),
        linear-gradient(-45deg, transparent 75%, #2a2b33 75%);
    background-size: 20px 20px;
    background-position: 0 0, 0 10px, 10px -10px, -10px 0;
}

.viewer-stage-wrap.bg-black {
    background: #000;
}

.viewer-stage-wrap.bg-white {
    background: #fff;
}

.viewer-preview-img,
.viewer-preview-canvas {
    display: block;
    image-rendering: auto;
    transition: width 0.2s ease, height 0.2s ease, max-width 0.2s ease, max-height 0.2s ease, transform 0.15s ease;
}

.viewer-preview-img.is-hidden,
.viewer-preview-canvas.is-hidden {
    display: none;
}

/* Fit: scale up/down to fill the stage while keeping aspect ratio */
.viewer-preview-img.zoom-fit,
.viewer-preview-canvas.zoom-fit {
    width: 100%;
    height: 100%;
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

/* 100%: one CSS pixel ≈ one image pixel */
.viewer-preview-img.zoom-actual,
.viewer-preview-canvas.zoom-actual {
    width: auto;
    height: auto;
    max-width: none;
    max-height: none;
    object-fit: none;
}

.viewer-toolbar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem 1rem;
    padding: 0.85rem 1.1rem;
    border-top: 1px solid var(--line);
    background: rgba(7, 8, 13, 0.55);
}

.viewer-toolbar-group {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.4rem;
}

.viewer-tool-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 34px;
    padding: 0 0.75rem;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    background: rgba(255, 255, 255, 0.04);
    color: rgba(245, 245, 247, 0.92);
    font-size: 0.8rem;
    font-weight: 550;
    cursor: pointer;
}

.viewer-tool-btn:hover {
    background: rgba(255, 255, 255, 0.08);
}

.viewer-tool-btn.is-active {
    border-color: rgba(199, 210, 254, 0.45);
    background: rgba(99, 102, 241, 0.35);
    color: #fff;
}

/* Separate Reset from playback/zoom controls */
.viewer-tool-btn--reset {
    margin-left: 0.85rem;
    background: transparent;
    color: rgba(154, 161, 178, 0.95);
    border-color: rgba(255, 255, 255, 0.1);
}

.viewer-tool-btn--reset:hover {
    background: rgba(255, 255, 255, 0.05);
    color: #fff;
}

.viewer-bg-dot {
    width: 28px;
    height: 28px;
    border-radius: 999px;
    border: 2px solid rgba(255, 255, 255, 0.2);
    cursor: pointer;
    padding: 0;
}

.viewer-bg-dot.is-active {
    border-color: var(--accent-link);
    box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.35);
}

.viewer-bg-dot--checker {
    background-color: #ccc;
    background-image:
        linear-gradient(45deg, #888 25%, transparent 25%),
        linear-gradient(-45deg, #888 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #888 75%),
        linear-gradient(-45deg, transparent 75%, #888 75%);
    background-size: 10px 10px;
    background-position: 0 0, 0 5px, 5px -5px, -5px 0;
}

.viewer-bg-dot--black {
    background: #000;
}

.viewer-bg-dot--white {
    background: #fff;
}

.viewer-meta {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 0.75rem 1.25rem;
    padding: 1rem 1.15rem 1.15rem;
    border-top: 1px solid var(--line);
}

.viewer-meta-item {
    min-width: 0;
}

.viewer-meta-label {
    display: block;
    font-size: 0.7rem;
    font-weight: 650;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 0.25rem;
}

.viewer-meta-value {
    font-size: 0.95rem;
    font-weight: 550;
    color: var(--text);
    word-break: break-word;
}

.viewer-format-tip {
    grid-column: 1 / -1;
    margin: 0.25rem 0 0;
    color: var(--muted);
    font-size: 0.9rem;
    line-height: 1.5;
}

.viewer-cross-format {
    margin: 0.85rem 1.15rem 1.15rem;
    padding: 0.75rem 0.95rem;
    border-radius: 12px;
    border: 1px solid rgba(129, 140, 248, 0.28);
    background: rgba(99, 102, 241, 0.08);
    color: rgba(226, 232, 240, 0.92);
    font-size: 0.88rem;
    line-height: 1.45;
}

.viewer-cross-format.is-hidden {
    display: none;
}

.viewer-error {
    margin: 0.85rem 1.15rem;
    padding: 0.75rem 0.95rem;
    border-radius: 12px;
    border: 1px solid rgba(248, 113, 113, 0.35);
    background: rgba(127, 29, 29, 0.25);
    color: #fecaca;
    font-size: 0.88rem;
}

.viewer-error.is-hidden {
    display: none;
}

/* --- Bridge --- */
.viewer-bridge {
    margin: 3.5rem auto 0;
    max-width: 40rem;
    text-align: center;
    padding: 2.5rem 1.5rem;
    background: #0f111a;
    border: 1px solid var(--line);
    border-radius: 28px;
}

.viewer-bridge h2 {
    font-size: clamp(1.35rem, 3vw, 1.75rem);
    font-weight: 750;
    letter-spacing: -0.03em;
    margin: 0 0 0.85rem;
    line-height: 1.25;
}

.viewer-bridge p {
    color: var(--muted);
    font-size: 1.05rem;
    line-height: 1.55;
    margin: 0 0 1.5rem;
}

.viewer-bridge-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    min-height: 48px;
    padding: 0 1.75rem;
    border-radius: 14px;
    background: var(--accent);
    color: #fff !important;
    font-weight: 600;
    font-size: 1.05rem;
    text-decoration: none;
    transition: transform 0.2s ease, background 0.2s ease;
}

.viewer-bridge-btn:hover {
    background: var(--accent-soft);
    transform: translateY(-1px);
    color: #fff !important;
}

.viewer-bridge-btn img {
    width: 22px;
    height: 22px;
    border-radius: 5px;
}

/* --- SEO blocks --- */
.viewer-seo {
    margin: 4rem auto 0;
    max-width: 42rem;
}

.viewer-seo h2 {
    font-size: 1.45rem;
    font-weight: 750;
    letter-spacing: -0.02em;
    margin: 0 0 1rem;
}

/* Space between SEO chapters (How to / Why / FAQ / Related) */
.viewer-seo h2:not(:first-child) {
    margin-top: 2.75rem;
    padding-top: 0.25rem;
}

.viewer-seo h3 {
    font-size: 1.05rem;
    font-weight: 650;
    margin: 1.5rem 0 0.5rem;
}

.viewer-seo p,
.viewer-seo li {
    color: var(--muted);
    font-size: 0.98rem;
    line-height: 1.65;
}

.viewer-seo ol,
.viewer-seo ul {
    padding-left: 1.2rem;
    margin: 0 0 1rem;
}

.viewer-seo > p {
    margin: 0 0 0.35rem;
}

.viewer-seo ol + p {
    margin-top: 0.35rem;
    margin-bottom: 0.25rem;
}

.viewer-seo details {
    border-top: 1px solid var(--line);
    padding: 0.35rem 0;
}

.viewer-seo details:first-of-type {
    margin-top: 0.35rem;
}

.viewer-seo details:last-of-type {
    border-bottom: 1px solid var(--line);
    margin-bottom: 0;
}

.viewer-seo summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    cursor: pointer;
    font-weight: 600;
    color: var(--text);
    list-style: none;
    padding: 0.85rem 0.15rem;
    border-radius: 10px;
    transition: color 0.2s ease, background 0.2s ease;
    -webkit-user-select: none;
    user-select: none;
}

.viewer-seo summary::-webkit-details-marker {
    display: none;
}

.viewer-seo summary::marker {
    content: "";
}

.viewer-seo summary:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.03);
}

.viewer-seo summary:focus-visible {
    outline: 2px solid rgba(199, 210, 254, 0.85);
    outline-offset: 2px;
}

/* Plus affordance — rotates to × when open */
.viewer-seo summary::after {
    content: "";
    flex-shrink: 0;
    width: 1.15rem;
    height: 1.15rem;
    margin-left: auto;
    background-color: currentColor;
    opacity: 0.72;
    -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2.4' stroke-linecap='round'%3E%3Cpath d='M12 5v14M5 12h14'/%3E%3C/svg%3E");
    mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2.4' stroke-linecap='round'%3E%3Cpath d='M12 5v14M5 12h14'/%3E%3C/svg%3E");
    -webkit-mask-size: contain;
    mask-size: contain;
    -webkit-mask-repeat: no-repeat;
    mask-repeat: no-repeat;
    -webkit-mask-position: center;
    mask-position: center;
    transform: rotate(0deg);
    transition: transform 0.28s cubic-bezier(0.22, 1, 0.36, 1), opacity 0.2s ease;
}

.viewer-seo summary:hover::after {
    opacity: 1;
}

.viewer-seo details[open] summary {
    margin-bottom: 0;
    color: #fff;
}

.viewer-seo details[open] summary::after {
    transform: rotate(45deg);
    opacity: 0.95;
}

.viewer-seo details[open] > *:not(summary) {
    padding: 0 0.15rem 0.85rem;
    animation: viewer-faq-open 0.28s ease;
}

@keyframes viewer-faq-open {
    from {
        opacity: 0;
        transform: translateY(-4px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.viewer-related {
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
    margin-top: 0.35rem;
}

.viewer-related a {
    font-weight: 550;
}

/* --- Footer CTA + site footer --- */
.viewer-cta {
    margin: 4rem auto 0;
    max-width: min(96vw, 40rem);
    text-align: center;
    padding: clamp(2.5rem, 6vw, 4rem) 1.5rem;
    background: #0f111a;
    border: 1px solid var(--line);
    border-radius: 32px;
}

.viewer-cta h2 {
    font-size: clamp(1.5rem, 3.5vw, 2rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    margin: 0 0 0.75rem;
}

.viewer-cta p {
    color: var(--muted);
    margin: 0 0 1.5rem;
    line-height: 1.55;
}

/* Site footer: reuse styles from ../style.css (.footer) — do not re-style here */

@media (max-width: 860px) {
    body {
        padding-top: 5.2rem;
    }

    .viewer-top-bar {
        top: 10px;
        left: 12px;
        right: 12px;
        transform: none;
        width: auto;
        min-height: 52px;
        border-radius: 18px;
        padding: 0.45rem 0.7rem;
        flex-wrap: wrap;
        justify-content: center;
    }

    .viewer-top-bar-name {
        font-size: 1rem;
    }

    .viewer-format-nav a {
        font-size: 0.74rem;
        padding: 0 0.45rem;
        min-height: 28px;
    }

    .viewer-top-bar-cta {
        font-size: 0.78rem;
    }
}