diagram-to-tikz/public/styles.css

@layer reset, base, components, pages;

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

    html,
    body {
        height: 100%;
    }

    body {
        margin: 0;
    }

    img {
        max-width: 100%;
        height: auto;
        display: block;
    }

    textarea {
        font: inherit;
    }
}

@layer base {
    :root {
        color-scheme: light dark;

        --border: 1px solid rgba(127, 127, 127, 0.35);
        --border-danger: 1px solid rgba(255, 0, 0, 0.35);

        --radius-lg: 0.75rem;
        --radius-md: 0.625rem;

        --pad-1: 0.5rem;
        --pad-2: 0.75rem;
        --pad-3: 1rem;
        --pad-4: 1.5rem;

        --text-dim: 0.78;

        --btn-bg: #f2f3f5;
        --btn-bg-hover: #e7e8ec;
        --btn-bg-active: #d9dbe0;
        --btn-border: #d0d4db;
        --btn-text: #20242c;

        --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
        --sans: system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, sans-serif;
    }

    @media (prefers-color-scheme: dark) {
        :root {
            --btn-bg: #2d3138;
            --btn-bg-hover: #343944;
            --btn-bg-active: #2a2e35;
            --btn-border: #3c414c;
            --btn-text: #e8ecf2;
        }
    }

    body {
        font-family: var(--sans);
        min-height: 100vh;
    }

    code {
        font-family: var(--mono);
        font-size: 0.95em;
    }
}

@layer components {
    .wrap {
        max-width: 54rem;
        margin-inline: auto;
        padding: var(--pad-4);
    }

    .label {
        font-size: 0.75rem;
        opacity: var(--text-dim);
        font-weight: 600;
    }

    .hint {
        font-size: 0.75rem;
        opacity: var(--text-dim);
    }

    .card {
        border: var(--border);
        border-radius: var(--radius-lg);
        padding: var(--pad-3);
    }

    .field {
        display: grid;
        grid-template-rows: auto 1fr;
        gap: 0.4rem;

        label {
            font-size: 0.875rem;
            opacity: 0.9;
        }

        input[type="file"],
        input[type="text"] {
            width: 100%;
        }

        input[type="text"] {
            padding: var(--pad-2);
            border-radius: var(--radius-lg);
            border: var(--border);
            background: transparent;
            color: inherit;
        }

        textarea {
            width: 100%;
            min-height: 6rem;
            padding: var(--pad-2);
            border-radius: var(--radius-lg);
            border: var(--border);
            background: transparent;
            color: inherit;
            resize: vertical;
        }
    }

    button,
    a.button,
    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        padding: 0.625rem 0.875rem;
        border-radius: var(--radius-md);
        border: 1px solid var(--btn-border);
        background: var(--btn-bg);
        cursor: pointer;
        text-decoration: none;
        color: var(--btn-text);
        gap: 0.4rem;
        box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.5), inset 0 -1px 0 rgba(0, 0, 0, 0.125);
        &:hover {
            background: var(--btn-bg-hover);
        }

        &:active {
            background: var(--btn-bg-active);
        }

        .icon {
            font-size: 0.9em;
            line-height: 1;
        }
    }

    .error {
        border: var(--border-danger);
        border-radius: var(--radius-lg);
        padding: var(--pad-3);
        white-space: pre-wrap;
    }
}

@layer pages {
    /* Index page */
    .page-index {
        .wrap {
            display: grid;
            gap: 1rem;
        }

        h1 {
            font-size: 1.25rem;
            margin: 0;
        }

        p {
            margin: 0;
            opacity: 0.88;
            line-height: 1.45;
        }

        form {
            display: grid;
            gap: 0.9rem;
        }

        .preview {
            display: none;
            margin-top: 0.75rem;
            padding: var(--pad-2);
            border-radius: var(--radius-lg);
            border: var(--border);

            img {
                border-radius: var(--radius-md);
            }

            .meta {
                margin-top: 0.5rem;
                font-size: 0.75rem;
                opacity: var(--text-dim);
                word-break: break-word;
            }
        }
    }

    /* Result page */
    .page-result {
        display: grid;
        grid-template-rows: auto 1fr;

        .topbar {
            display: flex;
            gap: 0.75rem;
            align-items: center;
            padding: var(--pad-2) var(--pad-3);
            border-bottom: var(--border);

            a {
                text-decoration: none;
            }
        }

        .container {
            min-height: 0;
            display: grid;
            grid-template-columns: 1fr 1fr;
        }

        .pane {
            min-width: 0;
            padding: var(--pad-3);
        }

        .left {
            border-right: var(--border);
            display: grid;
            grid-template-rows: auto 1fr;
            gap: 0.75rem;
        }

        .edit-form {
            min-height: 0;
            display: grid;
            grid-template-rows: auto 1fr;
            gap: 0.75rem;

            .prompt-row {
                display: flex;
                gap: 0.5rem;
                align-items: stretch;

                input[type="text"] {
                    flex: 1;
                    min-width: 0;
                }

                .btn {
                    white-space: nowrap;
                }
            }

            .actions {
                display: flex;
                flex-wrap: wrap;
                gap: 0.5rem;
                align-items: center;
            }

            textarea {
                min-height: 10rem;
            }
        }

        /* Fallback: ensure layout even without CSS nesting support */
        .edit-form .prompt-row {
            display: flex;
            gap: 0.5rem;
            align-items: stretch;
        }

        .edit-form .prompt-row input[type="text"] {
            flex: 1;
            min-width: 0;
        }

        .edit-form .prompt-row .btn {
            white-space: nowrap;
        }

        .right {
            display: grid;
            grid-template-rows: auto 1fr auto auto;
            gap: 0.75rem;
        }

        textarea {
            width: 100%;
            height: 100%;
            resize: none;
            font-family: var(--mono);
            font-size: 0.85rem;
            line-height: 1.45;
            padding: var(--pad-2);
            border-radius: var(--radius-lg);
            border: var(--border);
            white-space: pre;
            overflow: auto;
        }

        .preview {
            min-height: 15rem;
            display: grid;
            place-items: center;
            border-radius: var(--radius-lg);
            border: var(--border);
            overflow: auto;
        }

        .downloads {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
        }

        .error {
            font-family: var(--mono);
            font-size: 0.85rem;
        }

        @media (max-width: 60rem) {
            .container {
                grid-template-columns: 1fr;
            }

            .left {
                border-right: none;
                border-bottom: var(--border);
            }
        }

        @media (max-width: 40rem) {
            .topbar {
                flex-wrap: wrap;
                gap: 0.5rem;
                padding: var(--pad-2) var(--pad-2);
            }

            .topbar .label {
                display: none;
            }
        }
    }
}