:root {
    /* Fonts */
    --font-main: 'Inter', sans-serif;
    --font-heading: 'Outfit', sans-serif;

    /* Theme: Light */
    --bg-app: #f8fafc;
    --bg-sidebar: #ffffff;
    --bg-header: #ffffff;
    --bg-paper: #ffffff;
    --text-main: #0f172a;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
    --accent: #2563eb;
    --accent-hover: #1d4ed8;
    --accent-soft: rgba(37, 99, 235, 0.1);
    --input-bg: #ffffff;
    --shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05);
    --header-height: 70px;
    --sidebar-width: 320px;
}

@media (prefers-color-scheme: dark) {
    body:not(.theme-light) {
        --bg-app: #030712;
        --bg-sidebar: #0f172a;
        --bg-header: #0f172a;
        --bg-paper: #1e293b;
        --text-main: #f8fafc;
        --text-muted: #94a3b8;
        --border-color: #1e293b;
        --accent: #38bdf8;
        --accent-hover: #0ea5e9;
        --accent-soft: rgba(56, 189, 248, 0.1);
        --input-bg: #1e293b;
        --shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.3);
    }
}

body.theme-dark {
    --bg-app: #030712;
    --bg-sidebar: #0f172a;
    --bg-header: #0f172a;
    --bg-paper: #1e293b;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --border-color: #1e293b;
    --accent: #38bdf8;
    --accent-hover: #0ea5e9;
    --accent-soft: rgba(56, 189, 248, 0.1);
    --input-bg: #1e293b;
    --shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.3);
}

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

body {
    font-family: var(--font-main);
    background-color: var(--bg-app);
    color: var(--text-main);
    transition: background-color 0.4s ease;
    height: 100vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

/* Header Styling */
.app-header {
    height: var(--header-height);
    background: var(--bg-header);
    border-bottom: 2px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    z-index: 100;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-img {
    height: 32px;
    width: auto;
    object-fit: contain;
}

.logo h1 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.header-center {
    display: flex;
    align-items: center;
    gap: 24px;
}

/* Toggle Buttons (Dimensional & Orientation) */
.dimension-toggle,
.orientation-toggle {
    display: flex;
    background: var(--bg-app);
    padding: 4px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.mode-btn,
.orient-btn {
    position: relative;
    cursor: pointer;
}

.mode-btn input,
.orient-btn input {
    position: absolute;
    opacity: 0;
}

.mode-btn span,
.orient-btn span {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 8px 16px;
    font-size: 0.8125rem;
    font-weight: 600;
    border-radius: 8px;
    transition: all 0.22s cubic-bezier(0.4, 0, 0.2, 1);
    color: var(--text-muted);
}

.mode-btn input:checked+span,
.orient-btn input:checked+span {
    background: var(--bg-sidebar);
    color: var(--accent);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

/* Main Content Area */
.app-main {
    flex: 1;
    display: flex;
    overflow: hidden;
    position: relative;
}

/* Sidebars Base */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-sidebar);
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--border-color);
    position: relative;
    /* CRITICAL: Contain the absolute lock-overlay */
    overflow-x: hidden;
    overflow-y: hidden;
    /* PREVENT: Blur from spanning across screen */
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1),
        margin 0.4s cubic-bezier(0.4, 0, 0.2, 1),
        width 0.4s ease;
    z-index: 50;
}

.sidebar-scroll {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    /* BLOCK: Horizontal bypass leaks */
    scrollbar-width: thin;
    position: relative;
    /* Contain lock overlays within scroll area */
}

/* BREAKOUT LOGIC: Allow tooltips to span across boundaries and above header */
.app-main:has(.preset-card:hover) {
    z-index: 150;
    /* Bring above header (100) */
    overflow: visible;
}

.sidebar:has(.preset-card:hover),
.sidebar:has(.preset-card:hover) .sidebar-scroll {
    z-index: 200;
    overflow: visible !important;
}

.right-sidebar {
    border-right: none;
    border-left: 1px solid var(--border-color);
}

.right-sidebar.closed {
    width: 0;
    margin-right: calc(var(--sidebar-width) * -1);
    transform: translateX(100%);
    pointer-events: none;
}

/* Sidebar Sections */
.sidebar-section {
    border-bottom: 1px solid var(--border-color);
}

.sidebar-section summary,
.section-title {
    list-style: none;
    padding: 16px 24px;
    cursor: pointer;
    font-family: var(--font-heading);
    font-size: 0.8125rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    display: flex;
    align-items: center;
    gap: 10px;
}

.sidebar-section summary::after {
    content: '→';
    margin-left: auto;
    transition: transform 0.3s;
    color: var(--text-muted);
}

.sidebar-section[open] summary::after {
    transform: rotate(90deg);
}

.sidebar-section summary i,
.section-title i {
    width: 16px;
    height: 16px;
    color: var(--accent);
}

.section-content {
    padding: 0 24px 24px 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

/* Preset Grid */
.preset-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

.preset-card {
    background: var(--bg-app);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 12px 8px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    color: var(--text-main);
}

.preset-card i {
    width: 20px;
    height: 20px;
    color: var(--text-muted);
    transition: color 0.2s;
}

.preset-card span {
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.02em;
    text-align: center;
    color: var(--text-muted);
}

.preset-card:hover {
    background: var(--bg-sidebar);
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    z-index: 10;
}

/* Preset Tooltips */
.preset-card {
    position: relative;
}

.preset-card:hover::after {
    content: attr(data-note);
    position: absolute;
    bottom: calc(100% + 12px);
    /* Spawns at top */
    left: 50%;
    transform: translateX(-50%);
    background: var(--text-main);
    color: var(--bg-sidebar);
    padding: 10px 14px;
    border-radius: 8px;
    font-size: 0.7rem;
    width: 160px;
    line-height: 1.4;
    pointer-events: none;
    z-index: 900;
    /* Above siblings, below lock-overlay (1000) */
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    text-align: center;
    text-transform: none;
    font-weight: 500;
}

.preset-card:hover::before {
    content: '';
    position: absolute;
    bottom: calc(100% + 4px);
    /* Spawns at top */
    left: 50%;
    transform: translateX(-50%);
    border: 6px solid transparent;
    border-top-color: var(--text-main);
    /* Downward pointing arrow */
    z-index: 901;
}

.preset-card:hover i,
.preset-card:hover span {
    color: var(--accent);
}

.preset-card.active {
    background: var(--accent-soft);
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent-soft);
}

.preset-card.active i,
.preset-card.active span {
    color: var(--accent);
}

.sidebar-footer {
    padding: 20px;
    border-top: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: 10px;
    background: var(--bg-sidebar);
}

.control-group h4 {
    font-size: 0.725rem;
    color: var(--text-muted);
    margin-bottom: 10px;
    text-transform: uppercase;
    font-weight: 700;
    letter-spacing: 0.02em;
}

.slider-with-label {
    display: flex;
    align-items: center;
    gap: 12px;
}

.slider-with-label input[type="range"] {
    flex: 1;
}

.val-badge {
    background: var(--accent-soft);
    color: var(--accent);
    padding: 2px 8px;
    border-radius: 6px;
    font-size: 0.725rem;
    font-weight: 700;
    min-width: 48px;
    text-align: center;
}

.label-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 4px;
}

.label-row label {
    font-size: 0.65rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
}

.label-row span,
.reset-mini {
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--accent);
}

.reset-mini {
    background: var(--accent-soft);
    border: 1px solid var(--accent);
    padding: 0 6px;
    border-radius: 4px;
    cursor: pointer;
    transition: 0.2s;
}

.reset-mini:hover {
    background: var(--accent);
    color: white;
}

.input-wrapper {
    display: flex;
    align-items: center;
    gap: 12px;
}

.text-input,
.select-input {
    width: 100%;
    padding: 10px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background: var(--input-bg);
    color: var(--text-main);
    font-size: 0.875rem;
}

.text-input.mini {
    padding: 6px 10px;
}

.color-picker {
    width: 44px;
    height: 36px;
    border: none;
    background: none;
    cursor: pointer;
}

/* Radio Grid Groups */
.radio-group-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 6px;
}

#measurements {
    background: var(--bg-app);
    padding: 12px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    margin-top: 10px;
}

#measurements .label-row label {
    font-size: 0.65rem;
    opacity: 0.8;
}

#measurements input[type="range"] {
    height: 4px;
}

.radio-item span {
    display: block;
    padding: 10px;
    border-radius: 10px;
    border: 2px solid var(--border-color);
    text-align: center;
    font-size: 0.75rem;
    font-weight: 700;
    cursor: pointer;
    transition: 0.2s;
    color: var(--text-muted);
}

.radio-item input {
    display: none;
}

.radio-item input:checked+span {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
    box-shadow: 0 4px 12px var(--accent-soft);
    transform: translateY(-1px);
}

.radio-item-mini {
    position: relative;
    cursor: pointer;
    flex: 1;
}

.radio-item-mini input {
    position: absolute;
    opacity: 0;
}

.radio-item-mini span {
    display: block;
    padding: 6px;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    text-align: center;
    font-size: 0.7rem;
    font-weight: 600;
    transition: 0.2s;
    color: var(--text-muted);
}

.radio-item-mini input:checked+span {
    background: var(--accent-soft);
    color: var(--accent);
    border-color: var(--accent);
}

.radio-group-compact {
    display: flex;
    gap: 8px;
}

.checkbox-item {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 0.8125rem;
}

.checkbox-item input {
    accent-color: var(--accent);
}

/* Preview Area logic */
.preview-area {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-app);
    padding: 40px;
    z-index: 10;
    transition: flex-grow 0.4s ease;
}

.preview-paper {
    background: white;
    box-shadow: var(--shadow);
    display: flex;
    overflow: hidden;
    animation: fadeIn 0.5s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

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

.portrait {
    width: min(80vw, 420px);
    height: min(90vh, 594px);
}

.landscape {
    width: min(90vw, 594px);
    height: min(80vh, 420px);
}

/* Buttons */
.primary-button {
    width: auto;
    min-width: 200px;
    padding: 12px 24px;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 12px;
    font-weight: 700;
    font-size: 0.9rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    box-shadow: 0 4px 14px var(--accent-soft);
    transition: all 0.2s ease;
}

.primary-button:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--accent-soft);
}

.primary-button:active {
    transform: translateY(0);
}

.primary-icon-button {
    background: var(--accent-soft);
    color: var(--accent);
    border: 1px solid var(--accent);
    padding: 10px 16px;
    border-radius: 12px;
    cursor: pointer;
    font-weight: 700;
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.2s ease;
}

.primary-icon-button:hover {
    background: var(--accent);
    color: white;
}

.icon-button {
    background: none;
    border: 1px solid var(--border-color);
    padding: 8px;
    border-radius: 12px;
    cursor: pointer;
    color: var(--text-main);
}

/* Mobile Navigation */
.mobile-nav,
.mobile-fab,
.close-drawer-mobile {
    display: none;
}

@media (max-width: 1024px) {
    .left-sidebar {
        position: absolute;
        left: 0;
        top: 0;
        bottom: 0;
        transform: translateX(-100%);
    }

    .right-sidebar {
        position: absolute;
        right: 0;
        top: 0;
        bottom: 0;
        transform: translateX(100%);
        width: 100%;
        margin: 0;
    }

    .left-sidebar.open {
        transform: translateX(0);
        width: 85vw;
    }

    .right-sidebar.open {
        transform: translateX(0);
    }

    .preview-area {
        padding: 20px;
    }

    .mobile-nav {
        display: flex;
        position: fixed;
        bottom: 30px;
        left: 0;
        right: 0;
        justify-content: center;
        gap: 20px;
        z-index: 200;
    }

    .mobile-fab {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 56px;
        height: 56px;
        border-radius: 50%;
        border: none;
        background: var(--bg-header);
        box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
        color: var(--text-main);
        cursor: pointer;
    }

    .mobile-fab.accent {
        background: var(--accent);
        color: white;
    }

    .close-drawer-mobile {
        display: block;
        padding: 20px;
        border-top: 1px solid var(--border-color);
        background: var(--bg-sidebar);
    }
}

.hidden {
    display: none !important;
}

.mt-2 {
    margin-top: 8px;
}

.mb-2 {
    margin-bottom: 8px;
}

.mb-3 {
    margin-bottom: 12px;
}

.font-tiny {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
}

.helper-text {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-style: italic;
    line-height: 1.4;
    margin-top: 4px;
}

.sidebar-branding {
    padding: 24px;
    text-align: center;
    border-top: 1px solid var(--border-color);
    opacity: 0.8;
    transition: opacity 0.2s;
}

.sidebar-branding:hover {
    opacity: 1;
}

.sidebar-branding p {
    font-size: 0.65rem;
    text-transform: uppercase;
    font-weight: 700;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.kla-logo {
    max-width: 120px;
    height: auto;
    display: block;
    margin: 0 auto;
}

.kla-link {
    display: inline-block;
    transition: transform 0.2s;
}

.kla-link:hover {
    transform: scale(1.05);
}

/* Template Locking System */
.locked-parent {
    position: relative;
    overflow: hidden;
}

.lock-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    text-align: center;
    pointer-events: all;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.lock-overlay.visible {
    opacity: 1;
    visibility: visible;
}

/* Header Lock specifically */
.header-center {
    position: relative;
}

#header-lock-overlay {
    border-radius: 12px;
}

.theme-dark .lock-overlay {
    background: rgba(3, 7, 18, 0.2);
}

.lock-overlay-content {
    background: var(--bg-sidebar);
    padding: 24px;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    width: 80%;
    max-width: 250px;
}

.lock-overlay-content p {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
}

/* Export Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(8px);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.modal-overlay.visible {
    opacity: 1;
    visibility: visible;
}

.modal-card {
    background: var(--bg-sidebar);
    width: 90%;
    max-width: 440px;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.3);
    padding: 32px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.modal-card h2 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    text-align: center;
    color: var(--text-main);
}

.export-option-grid {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.export-option-btn {
    background: var(--bg-app);
    border: 1px solid var(--border-color);
    padding: 16px;
    border-radius: 14px;
    display: flex;
    align-items: flex-start;
    gap: 16px;
    cursor: pointer;
    text-align: left;
    transition: all 0.2s ease;
}

.export-option-btn:hover {
    border-color: var(--accent);
    background: var(--accent-soft);
}

.export-icon {
    width: 24px;
    height: 24px;
    margin-top: 2px;
    flex-shrink: 0;
}

.export-option-btn div h3 {
    font-size: 0.9rem;
    font-weight: 700;
    margin-bottom: 4px;
    color: var(--text-main);
}

.export-option-btn div p {
    font-size: 0.75rem;
    color: var(--text-muted);
}

#btn-import-template,
#btn-import-template-3d {
    border: 1px solid var(--accent);
    box-shadow: 0 0 12px var(--accent-soft);
    background: var(--accent-soft);
}

#btn-import-template i svg,
#btn-import-template-3d i svg {
    stroke: var(--accent) !important;
}

.modal-close-btn {
    align-self: center;
    background: none;
    border: none;
    color: var(--text-muted);
    font-weight: 600;
    cursor: pointer;
    text-decoration: underline;
    font-size: 0.8rem;
}

.w-full {
    width: 100% !important;
}