:root {
    --bg: #eef3f8;
    --bg-warm: #f8fafc;
    --panel: rgba(255, 255, 255, 0.8);
    --panel-strong: rgba(255, 255, 255, 0.96);
    --border: rgba(15, 23, 42, 0.08);
    --border-strong: rgba(15, 23, 42, 0.12);
    --text: #0f172a;
    --muted: #64748b;
    --accent: #0f766e;
    --accent-strong: #115e59;
    --danger: #b42318;
    --danger-bg: #fef2f2;
    --success: #0f766e;
    --success-bg: #ecfdf5;
    --shadow: 0 20px 50px rgba(15, 23, 42, 0.08);
    --shadow-soft: 0 10px 24px rgba(15, 23, 42, 0.06);
    --radius-xl: 24px;
    --radius-lg: 18px;
    --radius-md: 14px;
    --sidebar-width: 360px;
    --editor-pane-size: 52%;
}

* {
    box-sizing: border-box;
}

html {
    color-scheme: light;
}

body {
    margin: 0;
    min-height: 100vh;
    color: var(--text);
    background:
        radial-gradient(circle at top left, rgba(15, 118, 110, 0.12), transparent 26%),
        radial-gradient(circle at 80% 8%, rgba(56, 189, 248, 0.08), transparent 22%),
        linear-gradient(180deg, #f9fbfd 0%, #eef3f8 100%);
    font-family: "Manrope", "Open Sans", sans-serif;
}

body.is-pane-resizing {
    cursor: col-resize;
    user-select: none;
}

button,
input,
select,
textarea {
    font: inherit;
}

code,
pre,
textarea {
    font-family: "IBM Plex Mono", "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

.editor-shell {
    padding: 18px;
}

.topbar {
    display: flex;
    justify-content: space-between;
    gap: 18px;
    align-items: flex-start;
    padding: 18px 20px;
    border: 1px solid var(--border);
    border-radius: 28px;
    background: rgba(255, 255, 255, 0.68);
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow);
}

.eyebrow {
    margin: 0 0 6px;
    color: var(--accent);
    font-size: 10px;
    font-weight: 800;
    letter-spacing: 0.16em;
    text-transform: uppercase;
}

.topbar h1 {
    margin: 0;
    max-width: 780px;
    font-size: clamp(22px, 2vw, 31px);
    line-height: 1.15;
    letter-spacing: -0.03em;
}

.topbar-actions,
.language-tabs,
.toolbar-actions,
.draft-actions {
    display: flex;
    flex-wrap: nowrap;
    gap: 8px;
    min-width: 0;
    overflow-x: auto;
    scrollbar-width: none;
}

.topbar-actions::-webkit-scrollbar,
.language-tabs::-webkit-scrollbar,
.toolbar-actions::-webkit-scrollbar,
.draft-actions::-webkit-scrollbar {
    display: none;
}

.topbar-actions {
    align-items: center;
    justify-content: flex-end;
    max-width: min(100%, 720px);
}

.button,
.icon-button,
.language-tab {
    border: 1px solid var(--border);
    background: rgba(255, 255, 255, 0.94);
    color: var(--text);
    cursor: pointer;
    white-space: nowrap;
    transition:
        transform 0.15s ease,
        border-color 0.15s ease,
        background 0.15s ease,
        box-shadow 0.15s ease;
}

.button:hover,
.icon-button:hover,
.language-tab:hover {
    transform: translateY(-1px);
    border-color: rgba(15, 118, 110, 0.28);
    box-shadow: var(--shadow-soft);
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 9px 13px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 800;
    letter-spacing: -0.01em;
}

.button:disabled,
.icon-button:disabled,
.language-tab:disabled {
    opacity: 0.55;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.button-primary {
    border-color: transparent;
    background: linear-gradient(135deg, var(--accent), var(--accent-strong));
    color: #fff;
}

.button-secondary {
    background: rgba(255, 255, 255, 0.84);
}

.mode-badge,
.pill {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 7px 11px;
    border-radius: 999px;
    background: rgba(15, 118, 110, 0.1);
    color: var(--accent-strong);
    font-size: 11px;
    font-weight: 800;
    letter-spacing: 0.01em;
    white-space: nowrap;
}

.workspace {
    display: grid;
    grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
    gap: 18px;
    align-items: start;
    margin-top: 18px;
    transition: grid-template-columns 0.22s ease;
}

.workspace.is-sidebar-collapsed {
    grid-template-columns: 78px minmax(0, 1fr);
}

.sidebar,
.editor-stage {
    min-height: 0;
}

.sidebar {
    position: sticky;
    top: 18px;
    display: flex;
    flex-direction: column;
    gap: 14px;
    max-height: calc(100vh - 36px);
}

.sidebar-topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 12px;
    border: 1px solid var(--border);
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.66);
    backdrop-filter: blur(18px);
    box-shadow: var(--shadow-soft);
}

.sidebar-summary {
    min-width: 0;
}

.sidebar-summary strong {
    display: block;
    font-size: 13px;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.sidebar-toggle-button {
    flex: 0 0 auto;
}

.sidebar-panels {
    display: flex;
    flex-direction: column;
    gap: 14px;
    min-height: 0;
    padding-right: 4px;
    overflow-y: auto;
}

.sidebar-panels::-webkit-scrollbar {
    width: 8px;
}

.sidebar-panels::-webkit-scrollbar-thumb {
    border: 2px solid transparent;
    border-radius: 999px;
    background: rgba(100, 116, 139, 0.26);
    background-clip: padding-box;
}

.workspace.is-sidebar-collapsed .sidebar-topbar {
    justify-content: center;
    padding: 10px;
}

.workspace.is-sidebar-collapsed .sidebar-summary,
.workspace.is-sidebar-collapsed .sidebar-panels,
.workspace.is-sidebar-collapsed #sidebar-toggle-label {
    display: none;
}

.workspace.is-sidebar-collapsed .sidebar-toggle-button {
    width: 100%;
    min-width: 0;
    padding: 10px;
}

.panel,
.editor-panel,
.preview-panel {
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    background: var(--panel);
    backdrop-filter: blur(18px);
    box-shadow: var(--shadow);
}

.panel {
    padding: 15px;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
}

.panel-header h2 {
    margin: 0;
    font-size: 14px;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.panel-header-inline {
    padding: 14px 16px 0;
}

.panel-copy {
    margin: 0;
    color: var(--muted);
    font-size: 12px;
    line-height: 1.55;
}

.panel-copy code,
.feedback code,
.hint code {
    padding: 2px 6px;
    border-radius: 999px;
    background: rgba(148, 163, 184, 0.14);
    color: var(--text);
    font-size: 10.5px;
    word-break: break-all;
}

.field {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-top: 10px;
}

.field span {
    font-size: 12px;
    font-weight: 800;
    letter-spacing: -0.01em;
}

.field input,
.field select,
.field textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.92);
    color: var(--text);
    font-size: 13px;
}

.field input:focus,
.field select:focus,
.field textarea:focus,
#editor-textarea:focus {
    outline: none;
    border-color: rgba(15, 118, 110, 0.42);
    box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.1);
}

.inline-field,
.grid-two,
.action-grid,
.checkbox-row {
    display: grid;
    gap: 8px;
}

.inline-field {
    grid-template-columns: minmax(0, 1fr) auto;
}

.grid-two {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.action-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.checkbox-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    margin-top: 10px;
}

.checkbox-row-stacked {
    grid-template-columns: auto 1fr;
    align-items: start;
}

.checkbox-row-stacked span {
    font-size: 12px;
    font-weight: 700;
    line-height: 1.45;
    letter-spacing: -0.01em;
}

.checkbox-pill {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.86);
    font-size: 12px;
    font-weight: 700;
    white-space: nowrap;
}

.checkbox-pill-locked {
    background: rgba(15, 118, 110, 0.07);
}

.checkbox-pill input,
.checkbox-row-stacked input {
    margin: 0;
}

.language-block {
    margin-top: 10px;
}

.is-hidden {
    display: none;
}

.hint {
    color: var(--muted);
    font-size: 11px;
    line-height: 1.5;
}

.feedback {
    margin-top: 12px;
    padding: 12px 14px;
    border-radius: 16px;
    border: 1px solid transparent;
}

.feedback strong {
    display: block;
    margin-bottom: 4px;
    font-size: 12.5px;
}

.feedback p,
.feedback ul {
    margin: 0;
    font-size: 12px;
    line-height: 1.55;
}

.feedback ul {
    padding-left: 18px;
}

.feedback-neutral {
    background: rgba(15, 118, 110, 0.08);
    border-color: rgba(15, 118, 110, 0.14);
}

.feedback-success {
    background: var(--success-bg);
    border-color: rgba(15, 118, 110, 0.16);
    color: var(--success);
}

.feedback-error {
    background: var(--danger-bg);
    border-color: rgba(180, 35, 24, 0.14);
    color: var(--danger);
}

.editor-stage {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.toolbar {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 12px;
    align-items: center;
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: 22px;
    background: rgba(255, 255, 255, 0.72);
    backdrop-filter: blur(16px);
    box-shadow: var(--shadow-soft);
}

.language-tab {
    padding: 8px 12px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 800;
}

.language-tab.is-active {
    background: var(--text);
    color: #fff;
    border-color: var(--text);
    box-shadow: none;
}

.icon-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    min-height: 36px;
    padding: 0 10px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 700;
}

.icon-button-small {
    min-width: 32px;
    min-height: 32px;
    padding: 0;
}

.editor-grid {
    display: flex;
    align-items: stretch;
    gap: 12px;
    min-height: calc(100vh - 204px);
}

.editor-panel,
.preview-panel {
    display: flex;
    flex-direction: column;
    min-width: 0;
    min-height: 0;
    overflow: hidden;
}

.editor-panel {
    flex: 0 0 var(--editor-pane-size);
    min-width: 320px;
}

.preview-panel {
    flex: 1 1 0;
    min-width: 320px;
}

.pane-resizer {
    position: relative;
    flex: 0 0 12px;
    align-self: stretch;
    border-radius: 999px;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.72), rgba(226, 232, 240, 0.92));
    border: 1px solid rgba(148, 163, 184, 0.22);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.72);
    cursor: col-resize;
}

.pane-resizer::before {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 4px;
    height: 52px;
    border-radius: 999px;
    background: rgba(100, 116, 139, 0.42);
    transform: translate(-50%, -50%);
}

.pane-resizer:focus {
    outline: none;
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.72),
        0 0 0 3px rgba(15, 118, 110, 0.16);
}

#editor-textarea {
    flex: 1;
    min-height: 560px;
    padding: 16px 18px;
    border: none;
    background:
        linear-gradient(180deg, rgba(15, 23, 42, 0.98), rgba(15, 23, 42, 0.94)),
        linear-gradient(180deg, rgba(30, 41, 59, 0.25), rgba(15, 23, 42, 0));
    color: #d8e3ef;
    font-size: 13px;
    line-height: 1.7;
    letter-spacing: -0.01em;
    resize: none;
    tab-size: 2;
}

.preview-content {
    flex: 1;
    overflow: auto;
    padding: 16px 18px 22px;
    background: var(--panel-strong);
}

.preview-content h1,
.preview-content h2,
.preview-content h3 {
    margin-top: 1.4rem;
    margin-bottom: 0.8rem;
    font-family: "Manrope", "Open Sans", sans-serif;
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -0.03em;
}

.preview-content h1 {
    font-size: 1.75rem;
}

.preview-content h2 {
    font-size: 1.35rem;
}

.preview-content h3 {
    font-size: 1.1rem;
}

.preview-content p,
.preview-content li {
    font-family: "Lora", serif;
    font-size: 0.97rem;
    line-height: 1.75;
}

.preview-content code {
    font-size: 0.86em;
}

.preview-content img,
.preview-content video {
    display: block;
    max-width: 100%;
    height: auto;
    border-radius: 16px;
}

.preview-content pre {
    border-radius: 16px;
}

.stats {
    color: var(--muted);
    font-size: 11px;
    font-weight: 700;
    white-space: nowrap;
}

.modal-overlay {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    background: rgba(15, 23, 42, 0.38);
    backdrop-filter: blur(8px);
}

.modal-overlay.is-hidden {
    display: none;
}

.modal {
    width: min(560px, 100%);
    max-height: min(80vh, 720px);
    overflow: auto;
    padding: 18px;
    border-radius: 24px;
    border: 1px solid var(--border);
    background: rgba(255, 255, 255, 0.96);
    box-shadow: var(--shadow);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
}

.modal-header h2 {
    margin: 0;
    font-size: 17px;
    font-weight: 800;
}

.modal-body {
    margin-top: 14px;
}

.draft-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.draft-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.88);
}

.draft-name {
    font-size: 13px;
    font-weight: 800;
    letter-spacing: -0.01em;
}

@media (max-width: 1320px) {
    .topbar {
        flex-direction: column;
        align-items: stretch;
    }

    .topbar-actions {
        justify-content: flex-start;
        max-width: 100%;
    }
}

@media (max-width: 1180px) {
    .workspace,
    .workspace.is-sidebar-collapsed {
        grid-template-columns: 1fr;
    }

    .sidebar {
        position: static;
        max-height: none;
    }

    .sidebar-panels {
        overflow: visible;
        padding-right: 0;
    }

    .editor-grid {
        flex-direction: column;
        min-height: auto;
    }

    .editor-panel,
    .preview-panel {
        min-width: 0;
    }

    .editor-panel {
        flex-basis: auto;
    }

    .pane-resizer {
        display: none;
    }
}

@media (max-width: 760px) {
    .editor-shell {
        padding: 14px;
    }

    .topbar,
    .toolbar {
        padding: 14px;
    }

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

    .grid-two,
    .checkbox-row {
        grid-template-columns: 1fr;
    }

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

    .inline-field {
        grid-template-columns: minmax(0, 1fr);
    }

    .panel-header,
    .panel-header-inline {
        align-items: flex-start;
    }

    #editor-textarea {
        min-height: 420px;
    }
}