:root {
    color-scheme: light;
    --page: #f2f4f5;
    --surface: #ffffff;
    --surface-muted: #e8ecee;
    --text: #17201d;
    --text-muted: #5d6863;
    --border: #cdd4d1;
    --border-strong: #9ca8a3;
    --accent: #087451;
    --accent-hover: #055b40;
    --focus: #1769aa;
    --error: #a52a2a;
    --error-bg: #fff2f0;
    --success: #12623f;
    --header-height: 58px;
}

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    min-width: 320px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background: var(--page);
    color: var(--text);
    font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    font-size: 15px;
    line-height: 1.5;
    letter-spacing: 0;
}

button,
input {
    font: inherit;
    letter-spacing: 0;
}

a {
    color: inherit;
}

.app-header {
    min-height: var(--header-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0 1.5rem;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 0.625rem;
    color: var(--text);
    font-size: 0.95rem;
    font-weight: 700;
    text-decoration: none;
}

.brand img {
    flex: 0 0 auto;
    border-radius: 6px;
}

.app-header nav {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    font-size: 0.875rem;
}

.app-header nav a {
    color: var(--text-muted);
    font-weight: 600;
    text-underline-offset: 3px;
}

.privacy-status {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--success);
    font-weight: 600;
}

.privacy-status::before {
    width: 7px;
    height: 7px;
    flex: 0 0 auto;
    border-radius: 50%;
    background: #1f9d68;
    content: "";
}

.app-main {
    width: 100%;
    max-width: 1180px;
    min-height: calc(100vh - var(--header-height) - 52px);
    margin: 0 auto;
    padding: 2rem;
}

.import-view {
    width: min(100%, 680px);
    margin: clamp(2rem, 8vh, 6rem) auto 0;
}

.import-heading {
    margin-bottom: 1.5rem;
}

.section-label {
    margin-bottom: 0.25rem;
    color: var(--accent);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
}

h1 {
    font-size: 1.75rem;
    font-weight: 700;
    line-height: 1.2;
}

h2 {
    font-size: 0.875rem;
    font-weight: 700;
}

#drop-zone {
    width: 100%;
    min-height: 260px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.375rem;
    padding: 2rem;
    background: var(--surface);
    border: 1px dashed var(--border-strong);
    border-radius: 8px;
    color: var(--text);
    cursor: pointer;
}

#drop-zone:hover,
#drop-zone.drag-over {
    border-color: var(--accent);
    background: #f7fbf9;
}

#drop-zone:focus-visible,
#preview-canvas:focus-visible,
.button:focus-visible,
input[type="range"]:focus-visible,
a:focus-visible,
h1:focus-visible {
    outline: 3px solid color-mix(in srgb, var(--focus) 30%, transparent);
    outline-offset: 3px;
}

.drop-title {
    font-size: 1rem;
    font-weight: 700;
}

.format-hint,
.source-meta {
    color: var(--text-muted);
    font-size: 0.8125rem;
}

.workspace {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 280px;
    min-height: 650px;
    overflow: hidden;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
}

.preview-pane {
    min-width: 0;
    display: flex;
    flex-direction: column;
    padding: 1.5rem;
}

.pane-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1.25rem;
}

.canvas-stage {
    min-height: 0;
    flex: 1;
    display: grid;
    place-items: center;
    padding: 1.5rem;
    overflow: hidden;
    background: var(--surface-muted);
    border: 1px solid var(--border);
}

#preview-canvas {
    width: min(100%, 560px);
    height: auto;
    aspect-ratio: 1;
    background: #ffffff;
    border: 1px solid var(--border-strong);
    cursor: grab;
    touch-action: none;
}

#preview-canvas:active {
    cursor: grabbing;
}

.controls-pane {
    display: flex;
    flex-direction: column;
    background: #f9faf9;
    border-left: 1px solid var(--border);
}

.control-group {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border);
}

.control-group h2 {
    margin-bottom: 1.25rem;
}

.field-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.625rem;
    color: var(--text-muted);
    font-size: 0.8125rem;
}

#zoom-value {
    color: var(--text);
    font-variant-numeric: tabular-nums;
    font-weight: 700;
}

input[type="range"] {
    width: 100%;
    accent-color: var(--accent);
}

.source-meta {
    margin-top: 1rem;
}

.export-group {
    margin-top: auto;
    border-top: 1px solid var(--border);
    border-bottom: 0;
}

.button {
    min-height: 40px;
    padding: 0.625rem 0.875rem;
    border: 1px solid transparent;
    border-radius: 6px;
    font-size: 0.875rem;
    font-weight: 700;
    cursor: pointer;
}

.button:disabled {
    cursor: wait;
    opacity: 0.65;
}

.button.primary,
.button.download {
    width: 100%;
    background: var(--accent);
    color: #ffffff;
}

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

.button.secondary {
    background: var(--surface);
    border-color: var(--border);
    color: var(--text);
}

.button.secondary:hover {
    border-color: var(--border-strong);
    background: var(--page);
}

.message {
    margin-top: 0.875rem;
    padding: 0.75rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 0.8125rem;
}

.message.success {
    border-color: #86b9a1;
    background: #edf8f2;
    color: var(--success);
}

.message.error {
    border-color: #d7a09b;
    background: var(--error-bg);
    color: var(--error);
}

.download {
    margin-top: 0.75rem;
}

.hidden {
    display: none !important;
}

.app-footer {
    min-height: 52px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0 1.5rem;
    color: var(--text-muted);
    font-size: 0.75rem;
}

@media (max-width: 760px) {
    .privacy-status {
        display: none;
    }

    .app-main {
        min-height: auto;
        padding: 1rem;
    }

    .import-view {
        margin-top: 1.5rem;
    }

    #drop-zone {
        min-height: 220px;
    }

    .workspace {
        grid-template-columns: 1fr;
        min-height: auto;
    }

    .preview-pane {
        padding: 1rem;
    }

    .pane-header {
        align-items: flex-end;
    }

    .canvas-stage {
        min-height: 0;
        padding: 0.75rem;
    }

    .controls-pane {
        border-top: 1px solid var(--border);
        border-left: 0;
    }

    .export-group {
        margin-top: 0;
    }

    .app-footer {
        flex-direction: column;
        align-items: flex-start;
        justify-content: center;
        padding: 0.75rem 1rem;
    }
}

@media (max-width: 420px) {
    .app-header {
        padding: 0 1rem;
    }

    .brand span {
        font-size: 0.875rem;
    }

    .pane-header {
        align-items: flex-start;
        flex-direction: column;
    }

    .button.secondary {
        width: 100%;
    }
}

@media (prefers-reduced-motion: no-preference) {
    #drop-zone,
    .button,
    .app-header nav a {
        transition: background-color 180ms ease-out, border-color 180ms ease-out, color 180ms ease-out;
    }
}