/* =============================================================
   layout.css — App shell, sidebar, header, editor area
   ============================================================= */

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

body {
    background: radial-gradient(circle at 15% 50%, rgba(76, 29, 149, 0.45), transparent 30%),
        radial-gradient(circle at 85% 30%, rgba(14, 116, 144, 0.45), transparent 30%),
        radial-gradient(circle at 50% 80%, rgba(190, 24, 93, 0.35), transparent 30%),
        hsl(230, 20%, 8%);
    background-size: 150% 150%;
    animation: liquidGradient 30s ease infinite alternate;
    color: var(--text-primary);
    font-family: var(--font-ui);
    height: 100vh;
    display: flex;
    overflow: hidden;
    line-height: 1.6;
}

[data-theme="light"] body {
    background: radial-gradient(circle at 15% 50%, rgba(167, 139, 250, 0.6), transparent 30%),
        radial-gradient(circle at 85% 30%, rgba(56, 189, 248, 0.6), transparent 30%),
        radial-gradient(circle at 50% 80%, rgba(244, 114, 182, 0.5), transparent 30%),
        hsl(220, 20%, 94%);
    background-size: 150% 150%;
}

@keyframes liquidGradient {
    0% {
        background-position: 0% 0%;
    }

    50% {
        background-position: 100% 100%;
    }

    100% {
        background-position: 0% 100%;
    }
}

.app-layout {
    display: flex;
    width: 100%;
    height: 100%;
}

.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* ── Sidebar ─────────────────────────────────────────────── */
.sidebar {
    width: 260px;
    background: var(--bg-pane);
    border-right: 1px solid var(--border);
    backdrop-filter: blur(28px) saturate(180%);
    -webkit-backdrop-filter: blur(28px) saturate(180%);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    z-index: 20;
    box-shadow: 1px 0 20px rgba(0, 0, 0, 0.1);
    transition: width 0.22s ease, opacity 0.18s ease, border-color 0.22s ease;
    overflow: hidden;
}

.sidebar.collapsed {
    width: 0;
    opacity: 0;
    border-right-color: transparent;
    pointer-events: none;
}

.sidebar-toggle-btn {
    flex-shrink: 0;
    opacity: 0.55;
    transition: opacity var(--transition), color var(--transition);
}

.sidebar-toggle-btn:hover {
    opacity: 1;
}

.sidebar-collapsed-indicator .sidebar-toggle-btn {
    color: var(--accent);
    opacity: 1;
}

.sidebar-header {
    height: 60px;
    padding: 0 16px 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
    -webkit-app-region: drag;
}

.sidebar-actions {
    display: flex;
    gap: 2px;
    -webkit-app-region: no-drag;
}

.sidebar-header h2 {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1.5px;
}

.sidebar-actions {
    display: flex;
    gap: 2px;
}

.file-list {
    flex: 1;
    overflow-y: auto;
    list-style: none;
    padding: 8px;
}

.tree-node {
    margin-bottom: 2px;
}

/* ── Header ─────────────────────────────────────────────── */
.app-header {
    height: 60px;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--bg-main);
    backdrop-filter: blur(28px) saturate(180%);
    -webkit-backdrop-filter: blur(28px) saturate(180%);
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
    z-index: 10;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
    transition: all var(--transition);
    -webkit-app-region: drag;
}

.controls,
.note-title-input,
.sidebar-toggle-btn {
    -webkit-app-region: no-drag;
}

/* ── Editor / Preview ────────────────────────────────────── */
.editor-container {
    display: flex;
    flex: 1;
    overflow: hidden;
    position: relative;
}

.pane {
    flex: 1;
    height: 100%;
    overflow-x: hidden;
    overflow-y: auto;
    background: var(--bg-main);
    backdrop-filter: blur(28px) saturate(180%);
    -webkit-backdrop-filter: blur(28px) saturate(180%);
    scroll-behavior: smooth;
    transition: background var(--transition), backdrop-filter var(--transition);
}

.editor-pane {
    display: flex;
    flex-direction: column;
}

#editor {
    flex: 1;
    width: 100%;
    height: 100%;
    resize: none;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.95rem;
    line-height: 1.75;
    padding: 32px 40px;
    outline: none;
    white-space: pre-wrap;
    word-break: break-all;
    /* Force long strings like AAAAAA to wrap */
    word-wrap: break-word;
    /* Legacy fallback */
    overflow-wrap: break-word;
    transition: color var(--transition), opacity var(--transition);
}

@keyframes smoothFade {
    from {
        opacity: 0;
        transform: translateY(4px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

#editor::placeholder {
    color: var(--text-secondary);
    opacity: 0.4;
}

.editor-pane.drag-over {
    outline: 2px dashed var(--accent);
    outline-offset: -4px;
    background: hsla(250, 100%, 65%, 0.04);
}

.divider {
    width: 2px;
    background: var(--border);
    cursor: col-resize;
    flex-shrink: 0;
    z-index: 5;
    transition: background var(--transition), box-shadow var(--transition);
}

.divider:hover,
.divider:active {
    background: var(--accent);
    box-shadow: 0 0 10px var(--accent-glow);
}

.preview-pane {
    background: var(--bg-main);
    padding: 32px 40px;
    backdrop-filter: blur(28px) saturate(180%);
    -webkit-backdrop-filter: blur(28px) saturate(180%);
    transition: flex 0.2s ease, opacity 0.18s ease;
    min-width: 0;
    overflow: hidden;
}

/* Preview hidden — editor takes full width */
.editor-container.preview-hidden .editor-pane {
    flex: 1 1 100% !important;
    /* Override JS inline flex */
    max-width: 100% !important;
}

.editor-container.preview-hidden .preview-pane {
    flex: 0 0 0px !important;
    /* Override JS inline flex */
    min-width: 0 !important;
    opacity: 0;
    pointer-events: none;
    padding: 0 !important;
    overflow: hidden;
}

.editor-container.preview-hidden .divider {
    display: none;
}

/* Editor hidden — preview takes full width */
.editor-container.editor-hidden .preview-pane {
    flex: 1 1 100% !important;
    /* Override JS inline flex */
    max-width: 100% !important;
}

.editor-container.editor-hidden .editor-pane {
    flex: 0 0 0px !important;
    /* Override JS inline flex */
    min-width: 0 !important;
    overflow: hidden;
    opacity: 0;
    pointer-events: none;
    padding: 0 !important;
}

.editor-container.editor-hidden .divider {
    display: none;
}

/* Preview toggle button */
.preview-toggle-btn {
    flex-shrink: 0;
    opacity: 0.55;
    transition: opacity var(--transition), color var(--transition);
}

.preview-toggle-btn:hover {
    opacity: 1;
}

/* ── Home Screen ─────────────────────────────────────────── */
.home-screen {
    position: fixed;
    inset: 0;
    z-index: 10;
    display: flex;
    align-items: stretch;
    background: var(--bg-main);
}

.home-left {
    width: 320px;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 56px 48px;
    background: var(--bg-pane);
    border-right: 1px solid var(--border);
    backdrop-filter: blur(28px) saturate(180%);
    -webkit-backdrop-filter: blur(28px) saturate(180%);
}

.home-brand {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.home-gem {
    font-size: 3rem;
    line-height: 1;
    user-select: none;
}

.home-app-name {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

.home-tagline {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.55;
}

.home-meta {
    display: flex;
    align-items: center;
    gap: 8px;
}

.home-lang-select {
    background: var(--bg-pane-hover);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    border-radius: 6px;
    padding: 5px 8px;
    font-family: var(--font-ui);
    font-size: 0.78rem;
    cursor: pointer;
    outline: none;
    transition: all var(--transition);
}

.home-lang-select:hover {
    border-color: var(--accent);
    color: var(--text-primary);
}

.home-about-btn {
    display: flex;
    align-items: center;
    gap: 5px;
    padding: 5px 10px;
    border-radius: 6px;
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    font-family: var(--font-ui);
    font-size: 0.78rem;
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
}

.home-about-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.home-right {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 56px 64px;
    gap: 32px;
    overflow-y: auto;
}

.home-actions-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.home-action-btn {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 18px;
    border-radius: 10px;
    font-family: var(--font-ui);
    font-size: 0.92rem;
    font-weight: 500;
    cursor: pointer;
    border: 1px solid transparent;
    transition: all var(--transition);
    width: 100%;
}

.home-action-btn svg {
    flex-shrink: 0;
    opacity: 0.85;
}

.home-action-btn.primary {
    background: var(--accent);
    color: #fff;
    box-shadow: 0 4px 16px var(--accent-glow);
}

.home-action-btn.primary:hover {
    filter: brightness(1.1);
    transform: translateY(-1px);
    box-shadow: 0 6px 20px var(--accent-glow);
}

.home-action-btn.secondary {
    background: var(--bg-pane-hover);
    color: var(--text-primary);
    border-color: var(--border);
}

.home-action-btn.secondary:hover {
    border-color: var(--accent);
    background: hsla(142, 65%, 48%, 0.07);
    transform: translateY(-1px);
}

.home-action-btn.ghost {
    background: transparent;
    color: var(--text-secondary);
    border-color: transparent;
}

.home-action-btn.ghost:hover {
    background: hsla(0, 80%, 60%, 0.07);
    color: #f87171;
    border-color: hsla(0, 80%, 60%, 0.2);
}

.home-section-label {
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1.2px;
    margin-bottom: 8px;
}

.home-recent-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.home-recent-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 12px;
    border-radius: 8px;
    cursor: pointer;
    border: 1px solid transparent;
    transition: all var(--transition);
    min-width: 0;
}

.home-recent-item:hover {
    background: var(--bg-pane-hover);
    border-color: var(--border);
}

.home-recent-item svg {
    flex-shrink: 0;
    opacity: 0.5;
}

.home-recent-name {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.home-recent-path {
    font-size: 0.72rem;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    flex: 1;
    min-width: 0;
}


body.bg-aurora {
    background: radial-gradient(circle at 10% 30%, rgba(16, 185, 129, 0.5), transparent 40%),
        radial-gradient(circle at 80% 80%, rgba(52, 211, 153, 0.4), transparent 40%),
        radial-gradient(circle at 40% 60%, rgba(6, 78, 59, 0.6), transparent 50%),
        hsl(160, 20%, 8%);
    background-size: 200% 200%;
    animation: liquidGradient 25s ease infinite alternate;
}

[data-theme="light"] body.bg-aurora {
    background: radial-gradient(circle at 10% 30%, rgba(16, 185, 129, 0.3), transparent 40%),
        radial-gradient(circle at 80% 80%, rgba(52, 211, 153, 0.2), transparent 40%),
        radial-gradient(circle at 40% 60%, rgba(167, 243, 208, 0.4), transparent 50%),
        hsl(160, 20%, 94%);
}

body.bg-cyberpunk {
    background: radial-gradient(circle at 20% 20%, rgba(255, 0, 85, 0.5), transparent 40%),
        radial-gradient(circle at 80% 80%, rgba(0, 255, 204, 0.4), transparent 40%),
        radial-gradient(circle at 50% 50%, rgba(138, 43, 226, 0.4), transparent 50%),
        hsl(280, 20%, 8%);
    background-size: 200% 200%;
    animation: liquidGradient 20s ease infinite alternate;
}

[data-theme="light"] body.bg-cyberpunk {
    background: radial-gradient(circle at 20% 20%, rgba(255, 0, 85, 0.3), transparent 40%),
        radial-gradient(circle at 80% 80%, rgba(0, 255, 204, 0.2), transparent 40%),
        radial-gradient(circle at 50% 50%, rgba(138, 43, 226, 0.2), transparent 50%),
        hsl(280, 20%, 94%);
}

body.bg-ocean {
    background: radial-gradient(circle at 30% 70%, rgba(14, 165, 233, 0.5), transparent 40%),
        radial-gradient(circle at 70% 30%, rgba(3, 105, 161, 0.4), transparent 40%),
        radial-gradient(circle at 50% 50%, rgba(125, 211, 252, 0.2), transparent 50%),
        hsl(200, 20%, 8%);
    background-size: 200% 200%;
    animation: liquidGradient 40s ease infinite alternate;
}

[data-theme="light"] body.bg-ocean {
    background: radial-gradient(circle at 30% 70%, rgba(14, 165, 233, 0.3), transparent 40%),
        radial-gradient(circle at 70% 30%, rgba(3, 105, 161, 0.2), transparent 40%),
        radial-gradient(circle at 50% 50%, rgba(125, 211, 252, 0.4), transparent 50%),
        hsl(200, 20%, 94%);
}

body.bg-sunset {
    background: radial-gradient(circle at 50% 20%, rgba(249, 115, 22, 0.5), transparent 40%),
        radial-gradient(circle at 20% 80%, rgba(236, 72, 153, 0.4), transparent 40%),
        radial-gradient(circle at 80% 80%, rgba(168, 85, 247, 0.4), transparent 50%),
        hsl(30, 20%, 8%);
    background-size: 200% 200%;
    animation: liquidGradient 35s ease infinite alternate;
}

[data-theme="light"] body.bg-sunset {
    background: radial-gradient(circle at 50% 20%, rgba(249, 115, 22, 0.3), transparent 40%),
        radial-gradient(circle at 20% 80%, rgba(236, 72, 153, 0.2), transparent 40%),
        radial-gradient(circle at 80% 80%, rgba(168, 85, 247, 0.2), transparent 50%),
        hsl(30, 20%, 94%);
}

/* ── Lite Mode (Performance) ── */
.lite,
.lite * {
    animation: none !important;
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
    transition: none !important;
}

/* Fallback for background when blur is off */
.lite .sidebar,
.lite .pane,
.lite .app-header,
.lite .modal,
.lite .app-menu {
    background: var(--bg-pane) !important;
    opacity: 1 !important;
}

/* Ensure the body gradient is static in lite mode */
.lite body {
    background-size: 100% 100% !important;
}

body.bg-custom {
    background: radial-gradient(circle at 15% 30%, rgba(var(--bg-custom-1), 0.5), transparent 40%),
        radial-gradient(circle at 85% 70%, rgba(var(--bg-custom-2), 0.4), transparent 40%),
        radial-gradient(circle at 50% 60%, rgba(var(--bg-custom-3), 0.6), transparent 50%),
        hsl(230, 20%, 8%);
    background-size: 200% 200%;
    animation: liquidGradient 30s ease infinite alternate;
}

[data-theme="light"] body.bg-custom {
    background: radial-gradient(circle at 15% 30%, rgba(var(--bg-custom-1), 0.3), transparent 40%),
        radial-gradient(circle at 85% 70%, rgba(var(--bg-custom-2), 0.2), transparent 40%),
        radial-gradient(circle at 50% 60%, rgba(var(--bg-custom-3), 0.4), transparent 50%),
        hsl(220, 20%, 94%);
}