/* =========================================================
   LP STUDIO — Unified Design System
   ========================================================= */

/* ---------------- Design Tokens (CSS Custom Properties) --- */
:root {
    /* Colors */
    --primary: #000000;
    --bg-body: #ffffff;
    --bg-sidebar: #fafafa;
    --bg-surface: #f8f9fa;
    --bg-surface-hover: #f1f3f5;
    --bg-muted: #f4f4f4;
    --border: #e2e5e9;
    --border-light: #eef0f2;
    --border-focus: #000000;
    --text-main: #111111;
    --text-muted: #64748b;
    --text-dim: #94a3b8;
    --text-placeholder: #c0c6cc;
    --danger: #ef4444;
    --danger-hover: #dc2626;
    --danger-bg: #fef2f2;
    --danger-border: #fecaca;
    --success: #22c55e;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --fs-2xs: 8px;
    /* tiny labels, counters */
    --fs-xs: 9px;
    /* secondary labels, small buttons */
    --fs-sm: 10px;
    /* main labels, field labels */
    --fs-base: 11px;
    /* body text, section names */
    --fs-md: 12px;
    /* standard inputs, icons */
    --fs-lg: 13px;
    /* modal titles, headings */

    /* Spacing */
    --sp-1: 4px;
    --sp-2: 8px;
    --sp-3: 12px;
    --sp-4: 16px;
    --sp-5: 20px;
    --sp-6: 24px;

    /* Radius */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;

    /* Transitions */
    --ease-smooth: cubic-bezier(0.16, 1, 0.3, 1);
    --duration-fast: 150ms;
    --duration-normal: 200ms;
    --duration-slow: 300ms;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.03);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 4px 16px rgba(0, 0, 0, 0.08);
}

/* ---------------- Scrollbar ----------------------------- */
::-webkit-scrollbar {
    width: 5px;
    height: 5px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: rgba(127, 127, 127, 0.35);
    border-radius: var(--radius-full);
    transition: background var(--duration-normal) ease;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(127, 127, 127, 0.55);
}

:root[data-theme] ::-webkit-scrollbar-thumb {
    background: color-mix(in srgb, var(--primary) 50%, transparent);
}

:root[data-theme] ::-webkit-scrollbar-thumb:hover {
    background: color-mix(in srgb, var(--primary) 80%, transparent);
}

:root[data-theme="hard"] ::-webkit-scrollbar-thumb,
:root[data-theme="rock"] ::-webkit-scrollbar-thumb,
:root[data-theme="system"] ::-webkit-scrollbar-thumb {
    background: color-mix(in srgb, var(--primary) 65%, transparent);
}

:root[data-theme="hard"] ::-webkit-scrollbar-thumb:hover,
:root[data-theme="rock"] ::-webkit-scrollbar-thumb:hover,
:root[data-theme="system"] ::-webkit-scrollbar-thumb:hover {
    background: color-mix(in srgb, var(--primary) 90%, transparent);
}

* {
    scrollbar-width: thin;
    scrollbar-color: rgba(127, 127, 127, 0.35) transparent;
}

:root[data-theme] {
    scrollbar-color: color-mix(in srgb, var(--primary) 50%, transparent) transparent;
}

:root[data-theme="hard"],
:root[data-theme="rock"],
:root[data-theme="system"] {
    scrollbar-color: color-mix(in srgb, var(--primary) 65%, transparent) transparent;
}

/* ---------------- Base Styles --------------------------- */
body {
    height: 100vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    font-family: var(--font-family);
    background-color: var(--bg-body);
    color: var(--text-main);
}

/* ---------------- Layout -------------------------------- */
#editor-container {
    flex: 1;
    display: flex;
    overflow: hidden;
}

#sidebar {
    width: 320px;
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    background: var(--bg-sidebar);
    transition: all var(--duration-slow) var(--ease-smooth);
}

.sidebar-scroll {
    overflow-y: auto;
    flex: 1;
}

#preview-area {
    flex: 1;
    background: var(--bg-muted);
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--sp-3) var(--sp-5) 0;
    overflow: hidden;
}

#preview-frame-container {
    position: relative;
    flex: 1;
    width: 100%;
    display: flex;
    justify-content: center;
    overflow: hidden;
    min-height: 0;
}

#preview-frame {
    background-color: white !important;
    box-shadow: var(--shadow-lg);
    transition: width 0.4s var(--ease-smooth), transform 0.4s var(--ease-smooth);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    overflow: hidden;
    width: 100%;
    min-height: 0;
    flex-shrink: 0;
    transform-origin: top center;
}

/* ---------------- Sitemap ------------------------------- */
.sitemap-area {
    max-height: 400px;
    overflow-y: auto;
    border-bottom: 1px solid var(--border);
    background: var(--bg-surface);
    padding: var(--sp-3) var(--sp-4) var(--sp-6);
}

.sitemap-item {
    cursor: pointer;
    transition: all var(--duration-normal) ease;
    font-size: var(--fs-base);
    border: 1px solid var(--border);
    background: white;
    margin-bottom: var(--sp-1);
    border-radius: var(--radius-md);
}

.sitemap-item.active {
    background: var(--bg-surface);
    color: var(--text-main);
    border: 1.5px solid var(--primary);
    box-shadow: var(--shadow-sm);
    border-radius: var(--radius-lg);
}

.sitemap-item.disabled {
    opacity: 0.4;
    filter: grayscale(1);
}

.sitemap-branch {
    margin-bottom: 0;
    padding: 0;
}

.sitemap-list {
    margin: 0;
    padding: 0;
    list-style: none;
}

.sitemap-branch>.sitemap-item {
    margin-bottom: 2px;
}

.sitemap-connector {
    display: none;
}

.sitemap-list .sitemap-list {
    padding-left: 0;
    margin-left: var(--sp-3);
    position: relative;
    margin-top: 0;
    margin-bottom: 0;
}

.sitemap-node {
    position: relative;
    margin: 0;
}

.sitemap-list .sitemap-list>.sitemap-node>.sitemap-item {
    position: relative;
    border-left: 3px solid var(--text-muted);
    border-top-left-radius: var(--sp-1);
    border-bottom-left-radius: var(--sp-1);
}

.sitemap-list .sitemap-list>.sitemap-node>.sitemap-item.active {
    border-left-color: rgba(255, 255, 255, 0.4);
}

.sitemap-node::before,
.sitemap-node::after {
    display: none !important;
}

.sitemap-list .sitemap-list::before {
    display: none !important;
}

.sitemap-actions {
    display: flex;
    opacity: 0;
    transition: opacity var(--duration-normal);
}

.sitemap-item:hover .sitemap-actions {
    opacity: 1;
}

/* ---------------- Drag & Drop Feedback ------------------- */
.sortable-ghost {
    background: var(--bg-surface) !important;
    border: 2px dashed var(--text-dim) !important;
    border-radius: var(--radius-xl);
    opacity: 0.3 !important;
    transform: scale(0.98);
}

.sortable-chosen {
    background: #fff !important;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1) !important;
    z-index: 100;
    border-color: var(--primary) !important;
}

.sortable-drag {
    opacity: 0.9;
    transform: scale(1.02);
    cursor: grabbing !important;
}

/* ---------------- Buttons (Unified) ---------------------- */
.btn-monotone {
    transition: all var(--duration-normal) ease;
    cursor: pointer;
}

.btn-monotone:hover {
    opacity: 0.8;
    transform: translateY(-1px);
}

/* ---------------- Section Items (Unified) ----------------- */
.section-item {
    transition: background var(--duration-normal), border-color var(--duration-normal), box-shadow var(--duration-normal), opacity var(--duration-normal);
    border: 1px solid var(--border);
}

.section-item:hover {
    box-shadow: var(--shadow-hover);
    border-color: #d0d4da;
}

.list-item-drag {
    transition: background var(--duration-normal), border-color var(--duration-normal), opacity var(--duration-normal);
}

.invalid-section-placeholder {
    padding: var(--sp-6);
    background: var(--danger-bg);
    border: 2px dashed var(--danger-border);
    border-radius: var(--radius-lg);
    text-align: center;
}

/* Section Accordion */
.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 12px 10px 10px;
    user-select: none;
    transition: background var(--duration-normal);
}

.section-header:hover {
    background: var(--bg-surface);
}

.section-item.expanded .section-header {
    border-bottom: 1px solid var(--border);
    background: var(--bg-surface);
}

.section-content {
    display: none;
    padding: var(--sp-4);
}

.section-item.expanded .section-content {
    display: block;
}

.section-icon {
    width: 24px;
    height: 24px;
    background: var(--bg-surface-hover);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: var(--sp-3);
    color: var(--text-muted);
}

.section-item.expanded .section-icon {
    background: var(--primary);
    color: var(--bg-body);
}

.section-drag-handle {
    cursor: grab;
    color: var(--border);
    padding: var(--sp-1);
    margin-left: -4px;
    margin-right: var(--sp-2);
    transition: color var(--duration-normal);
}

.section-drag-handle:hover {
    color: var(--text-muted);
}

.section-drag-handle:active {
    cursor: grabbing;
}

/* Hidden Section */
.section-item.disabled {
    opacity: 0.6;
    filter: grayscale(0.5);
}

.section-item.disabled .section-header {
    background: var(--bg-surface);
}

.section-item.disabled .section-content {
    display: none !important;
}

/* ---------------- Modal (Unified) ------------------------- */
#modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(4px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

#modal-content {
    background: white;
    padding: var(--sp-6) 28px;
    border-radius: var(--radius-xl);
    width: 90%;
    max-width: 420px;
    box-shadow: var(--shadow-lg);
    transform: translateY(20px);
    opacity: 0;
    transition: all var(--duration-slow) var(--ease-smooth);
}

#modal-overlay.active {
    display: flex;
}

#modal-overlay.active #modal-content {
    transform: translateY(0);
    opacity: 1;
}

/* ---------------- Color Popover (Unified) ----------------- */
.color-popover {
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    width: 240px;
    background: white;
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    padding: var(--sp-4);
    z-index: 100;
    display: none;
}

.color-popover.active {
    display: block;
}

.color-popover.open-up {
    top: auto;
    bottom: calc(100% + 10px);
}

.swatch-btn {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.swatch-checkers {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(45deg, #eee 25%, transparent 25%),
        linear-gradient(-45deg, #eee 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #eee 75%),
        linear-gradient(-45deg, transparent 75%, #eee 75%);
    background-size: 8px 8px;
    background-position: 0 0, 0 4px, 4px 4px, 4px 0;
    z-index: 1;
}

.swatch-color {
    position: absolute;
    inset: 0;
    z-index: 2;
}

/* ---------------- Unified Content Area Header ------------ */
.content-area-header {
    padding: 6px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border);
    background: var(--bg-surface);
    flex-shrink: 0;
}

/* ---------------- Responsive ------------------------------ */
@media (min-width: 1025px) {
    #sidebar.closed {
        margin-left: -320px;
    }
}

@media (max-width: 1024px) {
    #sidebar {
        position: fixed;
        left: -320px;
        top: 0;
        bottom: 0;
        z-index: 50;
        box-shadow: 20px 0 50px rgba(0, 0, 0, 0.1);
        transition: left var(--duration-slow) var(--ease-smooth);
        overflow: visible;
    }

    #sidebar.open {
        left: 0;
    }

    #preview-area {
        padding: 10px;
    }
}

/* ---------------- Template Studio Improvements ------------ */
.property-card-content {
    transition: all var(--duration-normal) var(--ease-smooth);
    overflow: hidden;
}

.property-card.collapsed .property-card-content {
    display: none;
}

.property-card.collapsed {
    padding-bottom: 0px !important;
    border-color: transparent !important;
    background-color: transparent !important;
    box-shadow: none !important;
}

.property-card {
    transition: all var(--transition-normal);
}

.insert-btn {
    opacity: 0.6;
    transition: all var(--duration-normal);
}

.insert-btn:hover {
    opacity: 1;
    color: var(--primary);
    transform: scale(1.1);
}

.variable-item:hover .insert-btn {
    opacity: 1;
}

#template-variables-list::-webkit-scrollbar {
    width: 4px;
}

#template-variables-list::-webkit-scrollbar-track {
    background: transparent;
}

#template-variables-list::-webkit-scrollbar-thumb {
    background: #e2e8f0;
    border-radius: 10px;
}

#template-variables-list::-webkit-scrollbar-thumb:hover {
    background: #cbd5e1;
}