:root {
    color-scheme: light;
    --page: #f7f8f4;
    --surface: #ffffff;
    --ink: #182924;
    --muted: #50635a;
    --line: #d5dfd7;
    --accent: #155b48;
    --accent-hover: #104637;
    --soft: #e8f0e8;
    --focus: #a9530c;
    --error: #9d352c;
}

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

[hidden] {
    display: none !important;
}

html {
    scroll-behavior: smooth;
}

body {
    display: flex;
    min-width: 0;
    min-height: 100vh;
    flex-direction: column;
    margin: 0;
    color: var(--ink);
    background: var(--page);
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.5;
}

main {
    flex: 1;
    padding-bottom: clamp(3rem, 6vw, 5rem);
}

h1,
h2,
p {
    overflow-wrap: anywhere;
}

h1,
h2 {
    line-height: 1.12;
}

button,
input,
select {
    font: inherit;
}

a {
    color: inherit;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible {
    outline: 3px solid var(--focus);
    outline-offset: 3px;
}

.container {
    width: 100%;
    max-width: 78rem;
    margin-inline: auto;
    padding-inline: clamp(1rem, 4vw, 2.5rem);
}

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

.skip-link {
    position: absolute;
    top: -5rem;
    left: 1rem;
    z-index: 10;
    padding: 0.7rem 1rem;
    border: 2px solid var(--ink);
    background: var(--surface);
}

.skip-link:focus {
    top: 1rem;
}

.site-header,
.site-footer {
    background: var(--surface);
}

.site-header {
    border-bottom: 1px solid var(--line);
}

.header-inner,
.footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.75rem 1.5rem;
}

.header-inner {
    min-height: 5rem;
    padding-block: 1rem;
}

.site-name {
    font-size: 1.2rem;
    font-weight: 800;
    letter-spacing: -0.04em;
}

.site-header a {
    font-size: 0.92rem;
    font-weight: 700;
    text-underline-offset: 0.3em;
}

.site-header a:hover {
    color: var(--accent);
}

.intro {
    display: grid;
    grid-template-columns: minmax(0, 1.4fr) minmax(16rem, 0.6fr);
    align-items: end;
    gap: clamp(2rem, 5vw, 5rem);
    padding-block: clamp(3.5rem, 7vw, 6rem) clamp(2.5rem, 5vw, 4rem);
}

.eyebrow {
    margin: 0 0 0.8rem;
    color: var(--accent);
    font-size: 0.76rem;
    font-weight: 800;
    letter-spacing: 0.13em;
    text-transform: uppercase;
}

h1 {
    margin: 0;
    font-size: clamp(3rem, 6vw, 5.6rem);
    letter-spacing: -0.06em;
}

.lead {
    max-width: 55ch;
    margin: 1.25rem 0 0;
    color: var(--muted);
    font-size: clamp(1rem, 1.5vw, 1.2rem);
}

.intro-steps {
    padding: 1.25rem 1.5rem;
    border-left: 3px solid var(--accent);
    background: var(--soft);
}

.intro-steps p {
    display: flex;
    align-items: baseline;
    gap: 0.9rem;
    margin: 0;
    padding-block: 0.35rem;
    font-weight: 700;
}

.intro-steps span {
    color: var(--accent);
    font-size: 0.78rem;
    font-variant-numeric: tabular-nums;
}

.panel {
    min-width: 0;
    padding: clamp(1.25rem, 3vw, 2rem);
    border: 1px solid var(--line);
    border-radius: 1rem;
    background: var(--surface);
    box-shadow: 0 12px 32px rgb(24 41 36 / 4%);
}

.panel h2 {
    margin: 0;
    font-size: clamp(1.45rem, 2.5vw, 2rem);
    letter-spacing: -0.04em;
}

.panel-heading {
    display: flex;
    align-items: end;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.5rem 2rem;
    margin-bottom: 1.4rem;
}

.panel-heading > p {
    margin: 0;
    color: var(--muted);
    font-size: 0.92rem;
}

.drop-zone {
    display: flex;
    min-height: 16rem;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    padding: 1.5rem;
    border: 2px dashed #9fbbab;
    border-radius: 0.8rem;
    background: #f4f9f4;
    text-align: center;
    transition: border-color 150ms ease, background-color 150ms ease;
}

.drop-zone:hover,
.drop-zone.is-dragover,
.drop-zone.is-dragging,
.drop-zone:focus-within {
    border-color: var(--accent);
    background: var(--soft);
}

.drop-zone:focus-within {
    outline: 3px solid var(--focus);
    outline-offset: 3px;
}

.drop-icon {
    display: grid;
    width: 3.4rem;
    height: 3.4rem;
    place-items: center;
    border-radius: 50%;
    background: #d6e8d9;
    color: var(--accent);
    font-size: 1.8rem;
    line-height: 1;
}

.drop-zone > p {
    margin: 0.85rem 0 0;
    font-size: 1.15rem;
    font-weight: 750;
}

.drop-or {
    margin-block: 0.3rem 0.8rem;
    color: var(--muted);
    font-size: 0.9rem;
}

.select-button,
.primary-button,
.download-button {
    display: inline-flex;
    min-height: 2.9rem;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    padding: 0.65rem 1.2rem;
    border: 1px solid var(--accent);
    border-radius: 0.5rem;
    background: var(--accent);
    color: #ffffff;
    font-weight: 750;
    text-decoration: none;
    cursor: pointer;
    transition: background-color 150ms ease;
}

.select-button:hover,
.primary-button:hover,
.download-button:hover {
    background: var(--accent-hover);
}

.primary-button:disabled,
.drop-zone.is-busy .select-button {
    opacity: 0.58;
    cursor: wait;
}

.helper {
    margin: 0;
    color: var(--muted);
    font-size: 0.9rem;
}

.upload-panel > .helper {
    margin-top: 0.9rem;
}

.no-script,
.status-message {
    margin: 1rem 0 0;
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    background: var(--soft);
    color: var(--accent);
    font-size: 0.92rem;
    font-weight: 650;
}

.status-message.is-error {
    background: #faeae7;
    color: var(--error);
}

.workspace {
    display: grid;
    grid-template-columns: minmax(17rem, 0.75fr) minmax(0, 1.25fr);
    align-items: start;
    gap: 1.25rem;
    margin-top: 1.5rem;
}

.controls-panel > .helper {
    margin-top: 0.8rem;
}

.field-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.9rem;
    margin-top: 1.7rem;
}

.field-grid label,
.select-field,
.quality-field > label {
    display: block;
    font-size: 0.9rem;
    font-weight: 750;
}

.field-grid label span {
    color: var(--muted);
    font-weight: 500;
}

.field-grid input,
.select-field select {
    display: block;
    width: 100%;
    min-height: 2.9rem;
    margin-top: 0.4rem;
    padding: 0.5rem 0.7rem;
    border: 1px solid #aabdb0;
    border-radius: 0.45rem;
    background: var(--surface);
    color: var(--ink);
}

.field-grid input:disabled,
.select-field select:disabled {
    background: var(--page);
    color: var(--muted);
}

.select-field,
.quality-field {
    margin-top: 1.25rem;
}

.quality-field > label {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
}

.quality-field output {
    color: var(--accent);
    font-variant-numeric: tabular-nums;
}

.quality-field input {
    display: block;
    width: 100%;
    margin: 0.85rem 0 0.6rem;
    accent-color: var(--accent);
}

.format-note {
    margin-top: 1rem;
    padding: 0.7rem 0.85rem;
    border-left: 3px solid var(--accent);
    background: var(--soft);
}

.primary-button {
    width: 100%;
    margin-top: 1.5rem;
}

.preview-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
    margin-top: 1.5rem;
}

.preview-item {
    min-width: 0;
    margin: 0;
}

.image-frame {
    display: grid;
    width: 100%;
    min-height: 16rem;
    place-items: center;
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: 0.55rem;
    background-color: #f1f4f0;
    background-image: linear-gradient(45deg, #e7ede6 25%, transparent 25%),
        linear-gradient(-45deg, #e7ede6 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #e7ede6 75%),
        linear-gradient(-45deg, transparent 75%, #e7ede6 75%);
    background-position: 0 0, 0 0.6rem, 0.6rem -0.6rem, -0.6rem 0;
    background-size: 1.2rem 1.2rem;
}

.image-frame img {
    display: block;
    width: 100%;
    height: 16rem;
    object-fit: contain;
}

.empty-preview {
    max-width: 18ch;
    margin: 1rem;
    padding: 0.5rem;
    border-radius: 0.35rem;
    background: rgb(255 255 255 / 89%);
    color: var(--muted);
    text-align: center;
}

.preview-item figcaption {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.2rem 0.8rem;
    margin-top: 0.7rem;
    font-size: 0.88rem;
}

.preview-item figcaption span {
    color: var(--muted);
    font-variant-numeric: tabular-nums;
}

.size-change {
    margin: 1.3rem 0 0;
    padding: 0.9rem 1rem;
    border-radius: 0.5rem;
    background: var(--soft);
    color: var(--accent);
    font-weight: 700;
}

.download-button {
    margin-top: 1rem;
}

.site-footer {
    border-top: 1px solid var(--line);
}

.footer-inner {
    min-height: 4rem;
    padding-block: 1rem;
    color: var(--muted);
    font-size: 0.85rem;
}

@media (max-width: 58rem) {
    .intro,
    .workspace {
        grid-template-columns: 1fr;
    }

    .intro {
        align-items: start;
    }

    .intro-steps {
        display: flex;
        flex-wrap: wrap;
        gap: 0.3rem 1.5rem;
    }
}

@media (max-width: 40rem) {
    .intro {
        gap: 1.5rem;
    }

    .intro-steps {
        display: block;
    }

    .preview-grid {
        grid-template-columns: 1fr;
    }

    .image-frame,
    .image-frame img {
        min-height: 13rem;
        height: 13rem;
    }

    .download-button {
        display: flex;
        width: 100%;
    }
}

@media (max-width: 24rem) {
    .field-grid {
        grid-template-columns: 1fr;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    .drop-zone,
    .select-button,
    .primary-button,
    .download-button {
        transition: none;
    }
}