:root {
    --canvas: #f5f7f2;
    --surface: #ffffff;
    --surface-soft: #eef4ef;
    --ink: #1d2420;
    --muted: #63706a;
    --border: #d7e0da;
    --accent: #2c6f5b;
    --accent-strong: #194c41;
    --signal: #b84a38;
    --signal-strong: #823023;
    --focus: #2d70b8;
    --shadow: 0 22px 54px rgba(31, 54, 45, 0.12);
    --radius-lg: 20px;
    --radius-md: 12px;
    --radius-sm: 8px;
}

* {
    box-sizing: border-box;
}

html {
    min-height: 100%;
    background: var(--canvas);
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--ink);
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.7), rgba(255, 255, 255, 0)),
        var(--canvas);
    overflow-x: hidden;
}

.page-shell {
    width: min(1160px, calc(100% - 2rem));
    min-height: 100dvh;
    margin: 0 auto;
    padding: clamp(0.8rem, 2vh, 1.4rem) 0 clamp(1rem, 2.4vh, 2rem);
    display: grid;
    grid-template-rows: auto minmax(0, 1fr) auto;
}

.site-header,
.site-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.site-header {
    padding-bottom: clamp(1rem, 2vh, 1.6rem);
}

main {
    min-height: 0;
    display: grid;
    align-items: center;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 0.85rem;
    color: inherit;
    text-decoration: none;
}

.brand__badge img {
    display: block;
    height: 30px;
    width: auto;
}

.brand__text {
    display: grid;
    gap: 0.12rem;
}

.brand__text strong {
    font-size: 1rem;
}

.brand__text small,
.intro-copy,
.limit-list dt,
.section-heading p,
.upload-zone__meta,
.file-list span,
.site-footer {
    color: var(--muted);
}

.flash-stack {
    display: grid;
    gap: 0.75rem;
    margin-bottom: 1.25rem;
}

.flash {
    padding: 0.95rem 1rem;
    border-radius: var(--radius-sm);
    border: 1px solid rgba(184, 74, 56, 0.22);
    background: #fff5f2;
}

.tool-layout {
    display: grid;
    grid-template-columns: minmax(0, 0.9fr) minmax(28rem, 1.1fr);
    gap: clamp(1rem, 2.8vw, 2.3rem);
    align-items: center;
}

.tool-intro {
    display: grid;
    gap: clamp(0.9rem, 1.8vh, 1.35rem);
}

.eyebrow {
    margin: 0;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--accent-strong);
}

h1,
h2,
h3,
p {
    margin-top: 0;
}

h1 {
    margin-bottom: 0;
    font-size: clamp(2.2rem, 4.4vw, 4.6rem);
    line-height: 1;
    letter-spacing: 0;
}

.intro-copy {
    max-width: 36rem;
    margin-bottom: 0;
    font-size: clamp(1rem, 1.3vw, 1.12rem);
    line-height: 1.55;
}

.limit-list {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.7rem;
    margin: 0;
}

.limit-list div {
    min-width: 0;
    padding: 0.8rem;
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.62);
    border: 1px solid var(--border);
}

.limit-list dt {
    font-size: 0.78rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.limit-list dd {
    margin: 0.15rem 0 0;
    font-size: 1rem;
    font-weight: 700;
}

.tool-panel {
    border-radius: var(--radius-lg);
    padding: clamp(0.9rem, 1.8vw, 1.25rem);
    background: var(--surface);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
}

.upload-form {
    display: grid;
    gap: clamp(0.85rem, 1.7vh, 1.25rem);
}

.upload-zone {
    position: relative;
    border-radius: var(--radius-md);
    padding: 0.8rem;
    border: 1.5px dashed rgba(44, 111, 91, 0.42);
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.86), rgba(238, 244, 239, 0.86)),
        repeating-linear-gradient(
            -45deg,
            rgba(44, 111, 91, 0.045) 0,
            rgba(44, 111, 91, 0.045) 14px,
            transparent 14px,
            transparent 28px
        );
    cursor: pointer;
    transition:
        transform 180ms ease,
        border-color 180ms ease,
        box-shadow 180ms ease;
}

.upload-zone:hover,
.upload-zone:focus-visible,
.upload-zone.is-active {
    transform: translateY(-2px);
    border-color: rgba(44, 111, 91, 0.82);
    box-shadow: 0 16px 34px rgba(44, 111, 91, 0.14);
    outline: none;
}

.upload-zone.is-busy,
.upload-zone.is-busy:hover,
.upload-zone.is-busy:focus-visible {
    cursor: progress;
    transform: none;
    border-color: var(--border);
    box-shadow: none;
    opacity: 0.76;
}

.upload-zone__inner {
    min-height: clamp(15rem, 35vh, 20rem);
    display: grid;
    place-items: center;
    text-align: center;
    gap: clamp(0.5rem, 1.2vh, 0.8rem);
    padding: clamp(1rem, 2vh, 1.35rem);
}

.upload-zone__icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: clamp(4rem, 8vh, 5.2rem);
    height: clamp(4rem, 8vh, 5.2rem);
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--accent), var(--accent-strong));
    color: #fff;
    font-weight: 800;
    letter-spacing: 0.08em;
}

.upload-zone h2 {
    margin-bottom: 0;
    font-size: clamp(1.35rem, 2.4vw, 2rem);
    line-height: 1.12;
}

.upload-zone p {
    margin-bottom: 0;
    color: var(--muted);
}

.upload-input {
    position: absolute;
    inset: 0;
    opacity: 0;
    cursor: pointer;
}

.upload-input:disabled {
    cursor: progress;
}

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

.picker-actions {
    position: relative;
    z-index: 2;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.55rem;
}

.secondary-button,
.submit-button {
    min-height: 2.75rem;
    border: 0;
    font: inherit;
    font-weight: 700;
    cursor: pointer;
    transition:
        transform 180ms ease,
        box-shadow 180ms ease,
        background 180ms ease,
        opacity 180ms ease;
}

.secondary-button {
    border-radius: 999px;
    padding: 0.55rem 0.9rem;
    background: #fff;
    color: var(--accent-strong);
    border: 1px solid rgba(44, 111, 91, 0.25);
}

.secondary-button:hover,
.secondary-button:focus-visible {
    transform: translateY(-1px);
    box-shadow: 0 10px 22px rgba(44, 111, 91, 0.13);
    outline: 2px solid transparent;
}

.upload-zone__meta {
    font-size: 0.95rem;
}

.file-list {
    list-style: none;
    margin: 0.15rem 0 0;
    padding: 0;
    display: grid;
    gap: 0.45rem;
    width: min(100%, 31rem);
    max-height: 12rem;
    overflow: auto;
}

.file-list li {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 0.75rem;
    align-items: center;
    padding: 0.62rem 0.72rem;
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid rgba(99, 112, 106, 0.16);
    text-align: left;
}

.file-list strong {
    min-width: 0;
    overflow-wrap: anywhere;
    font-size: 0.9rem;
}

.file-list span {
    white-space: nowrap;
    font-size: 0.82rem;
}

.size-section {
    display: grid;
    gap: 0.75rem;
    padding: 0.95rem;
    border-radius: var(--radius-md);
    background: var(--surface-soft);
    border: 1px solid var(--border);
}

.section-heading {
    display: grid;
    gap: 0.25rem;
}

.section-heading h3 {
    margin-bottom: 0;
    font-size: 1rem;
}

.section-heading p {
    margin-bottom: 0;
    line-height: 1.45;
}

.size-control {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 0.85rem;
    align-items: center;
}

.size-range {
    width: 100%;
    accent-color: var(--accent);
}

.size-number {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    min-width: 7.2rem;
    padding: 0.42rem 0.55rem;
    border-radius: var(--radius-sm);
    background: #fff;
    border: 1px solid var(--border);
    font-weight: 700;
}

.size-input {
    width: 4.7rem;
    border: 0;
    color: var(--ink);
    background: transparent;
    font: inherit;
    font-weight: 800;
    text-align: right;
}

.size-input:focus {
    outline: none;
}

.size-ticks {
    display: flex;
    justify-content: space-between;
    color: var(--muted);
    font-size: 0.82rem;
}

.submit-button {
    border-radius: 999px;
    padding: 0.78rem 1.2rem;
    background: linear-gradient(135deg, var(--signal), var(--signal-strong));
    color: #fff;
    box-shadow: 0 16px 34px rgba(184, 74, 56, 0.24);
}

.submit-button:hover,
.submit-button:focus-visible {
    transform: translateY(-2px);
    box-shadow: 0 22px 42px rgba(184, 74, 56, 0.3);
    outline: 2px solid transparent;
}

.submit-button[disabled],
.secondary-button[disabled] {
    opacity: 0.7;
    cursor: progress;
    transform: none;
    box-shadow: none;
}

.progress-panel {
    display: grid;
    gap: 0.65rem;
    padding: 0.9rem;
    border-radius: var(--radius-md);
    background: #fff;
    border: 1px solid rgba(44, 111, 91, 0.18);
}

.progress-panel[hidden] {
    display: none;
}

.progress-panel__row {
    display: grid;
    grid-template-columns: 8.5rem minmax(0, 1fr);
    gap: 0.75rem;
    align-items: baseline;
}

.progress-panel__row span {
    color: var(--muted);
    font-size: 0.86rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.progress-panel__row strong {
    min-width: 0;
    overflow-wrap: anywhere;
    font-size: 0.95rem;
}

.progress-meter {
    height: 0.55rem;
    overflow: hidden;
    border-radius: 999px;
    background: var(--surface-soft);
}

.progress-meter span {
    display: block;
    width: 0%;
    height: 100%;
    border-radius: inherit;
    background: linear-gradient(90deg, var(--accent), var(--signal));
    transition: width 220ms ease;
}

.field-errors {
    display: grid;
    gap: 0.35rem;
    color: var(--signal-strong);
    font-size: 0.94rem;
}

.field-errors p {
    margin: 0;
}

.upload-status {
    margin: 0;
    min-height: 1.25rem;
    color: var(--accent-strong);
    font-size: 0.94rem;
}

.site-footer {
    margin-top: clamp(1rem, 2vh, 1.5rem);
    padding: 0 0.2rem;
    font-size: 0.92rem;
}

.site-footer p {
    margin: 0;
}

.site-footer a {
    color: var(--accent-strong);
    font-weight: 700;
    text-decoration-color: rgba(44, 111, 91, 0.35);
    text-underline-offset: 0.18em;
}

code {
    font-family: "Cascadia Mono", "Consolas", monospace;
    font-size: 0.94em;
}

button:focus-visible,
input:focus-visible {
    outline: 3px solid rgba(45, 112, 184, 0.45);
    outline-offset: 2px;
}

@media (max-width: 940px) {
    .page-shell,
    main {
        display: block;
    }

    .tool-layout,
    .limit-list {
        grid-template-columns: 1fr;
    }

    .tool-layout {
        align-items: start;
    }

    .tool-intro {
        margin-bottom: 1rem;
    }
}

@media (max-width: 640px) {
    .page-shell {
        width: min(100% - 1rem, 100%);
    }

    .site-header {
        padding-bottom: 0.8rem;
    }

    .brand__text small {
        display: none;
    }

    .tool-panel {
        border-radius: 16px;
        padding: 0.75rem;
    }

    .upload-zone__inner {
        min-height: 17rem;
        padding: 1rem 0.5rem;
    }

    .size-control {
        grid-template-columns: 1fr;
    }

    .size-number {
        width: 100%;
        justify-content: flex-end;
    }

    .progress-panel__row {
        grid-template-columns: 1fr;
        gap: 0.2rem;
    }
}