/* =============================================================================
   CollabBoard — Master Stylesheet
   =============================================================================
   Owner : M2 (Frontend Engineer)
   Sprint: Day 1

   Layout: Full-viewport canvas with floating toolbar overlay.
   Theme:  CSS custom properties with light (default) + dark mode support.
   Grid:   No sidebar column — sidebar slides in as overlay (Day 3).

   Reference:
     - IMPLEMENTATION_PLAN.md §F1
     - SPECIFICATION.md §6.2
     - UI reference image (floating card toolbar, dot-grid canvas)
   ============================================================================= */

/* ---------------------------------------------------------------------------
   0. CSS Custom Properties — Design Tokens
   --------------------------------------------------------------------------- */
:root {
    /* ---- Typography ---- */
    --font-primary: 'Inter', system-ui, -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    /* ---- Spacing scale ---- */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 12px;
    --space-lg: 16px;
    --space-xl: 24px;
    --space-2xl: 32px;

    /* ---- Radii ---- */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 20px;
    --radius-full: 9999px;

    /* ---- Shadows ---- */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08), 0 2px 4px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12), 0 4px 12px rgba(0, 0, 0, 0.06);
    --shadow-toolbar: 0 2px 16px rgba(0, 0, 0, 0.08), 0 1px 4px rgba(0, 0, 0, 0.04);

    /* ---- Transitions ---- */
    --transition-fast: 120ms ease;
    --transition-normal: 200ms ease;
    --transition-smooth: 300ms cubic-bezier(0.4, 0, 0.2, 1);

    /* ---- Z-index layers ---- */
    --z-canvas: 1;
    --z-cursor-overlay: 10;
    --z-toolbar: 100;
    --z-sidebar: 200;
    --z-status-bar: 50;
    --z-modal-backdrop: 900;
    --z-modal: 1000;
}

/* ---- Light Theme (default) ---- */
[data-theme="light"] {
    --color-bg: #f5f5f0;
    --color-surface: #ffffff;
    --color-surface-hover: #f0f0ec;
    --color-surface-active: #e8e8e3;
    --color-border: #e2e2dd;
    --color-border-subtle: #ececea;

    --color-text-primary: #1a1a1f;
    --color-text-secondary: #6b6b76;
    --color-text-tertiary: #9e9ea8;
    --color-text-inverse: #ffffff;

    --color-accent: #5b5fc7;
    --color-accent-hover: #4a4eb5;
    --color-accent-light: #ededfa;

    --color-success: #2d9d5c;
    --color-warning: #d4930d;
    --color-error: #d93036;

    --color-dot-grid: #d0d0ca;
    --color-canvas-bg: #f5f5f0;

    --toolbar-bg: rgba(255, 255, 255, 0.92);
    --toolbar-blur: 12px;
    --toolbar-border: rgba(0, 0, 0, 0.06);

    --sidebar-bg: rgba(255, 255, 255, 0.96);

    --modal-backdrop: rgba(0, 0, 0, 0.3);

    --status-bar-bg: rgba(255, 255, 255, 0.85);
}

/* ---- Dark Theme ---- */
[data-theme="dark"] {
    --color-bg: #0f0f17;
    --color-surface: #1a1a28;
    --color-surface-hover: #232336;
    --color-surface-active: #2c2c42;
    --color-border: #2a2a3d;
    --color-border-subtle: #1f1f30;

    --color-text-primary: #e8e8ed;
    --color-text-secondary: #9090a0;
    --color-text-tertiary: #5e5e70;
    --color-text-inverse: #0f0f17;

    --color-accent: #7b7fde;
    --color-accent-hover: #9194e8;
    --color-accent-light: #1e1e3a;

    --color-success: #3dbd6f;
    --color-warning: #e8a820;
    --color-error: #ef4444;

    --color-dot-grid: #252538;
    --color-canvas-bg: #0f0f17;

    --toolbar-bg: rgba(26, 26, 40, 0.92);
    --toolbar-blur: 12px;
    --toolbar-border: rgba(255, 255, 255, 0.06);

    --sidebar-bg: rgba(26, 26, 40, 0.96);

    --modal-backdrop: rgba(0, 0, 0, 0.6);

    --status-bar-bg: rgba(26, 26, 40, 0.85);

    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.4);
    --shadow-toolbar: 0 2px 16px rgba(0, 0, 0, 0.3);
}


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

html,
body {
    width: 100%;
    height: 100%;
    overflow: hidden;
    font-family: var(--font-primary);
    font-size: 14px;
    line-height: 1.5;
    color: var(--color-text-primary);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

button {
    font-family: inherit;
    font-size: inherit;
    border: none;
    background: none;
    cursor: pointer;
    color: inherit;
}

input,
select {
    font-family: inherit;
    font-size: inherit;
}

ul {
    list-style: none;
}


/* ---------------------------------------------------------------------------
   2. App Container
   --------------------------------------------------------------------------- */
#app {
    position: relative;
    width: 100%;
    height: 100%;
    overflow: hidden;
}


/* ---------------------------------------------------------------------------
   3. Floating Toolbar
   --------------------------------------------------------------------------- */
#toolbar {
    position: fixed;
    top: var(--space-md);
    left: 50%;
    transform: translateX(-50%);
    z-index: var(--z-toolbar);

    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-xs) var(--space-md);
    height: 48px;

    background: var(--toolbar-bg);
    backdrop-filter: blur(var(--toolbar-blur));
    -webkit-backdrop-filter: blur(var(--toolbar-blur));
    border: 1px solid var(--toolbar-border);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-toolbar);

    transition: box-shadow var(--transition-normal),
        background var(--transition-normal);
}

#toolbar:hover {
    box-shadow: var(--shadow-md);
}

@keyframes shake {
  0%, 100% { transform: translateX(-50%); }
  20%, 60% { transform: translateX(calc(-50% - 5px)); }
  40%, 80% { transform: translateX(calc(-50% + 5px)); }
}

.shake-active {
  animation: shake 0.4s ease-in-out;
}

/* Toolbar sections */
.toolbar__section {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.toolbar__section--left {
    margin-right: var(--space-sm);
}

.toolbar__section--center {
    flex: 1;
    justify-content: center;
}

.toolbar__section--right {
    margin-left: var(--space-sm);
}

.toolbar__tool-group {
    display: flex;
    align-items: center;
    gap: 2px;
}

/* Toolbar buttons */
.toolbar__btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    transition: background var(--transition-fast),
        color var(--transition-fast),
        transform var(--transition-fast);
}

.toolbar__btn:hover {
    background: var(--color-surface-hover);
    color: var(--color-text-primary);
}

.toolbar__btn:active {
    transform: scale(0.95);
    background: var(--color-surface-active);
}

.toolbar__btn.active,
.toolbar__tool.active {
    background: var(--color-accent-light);
    color: var(--color-accent);
}

/* Brand button */
.toolbar__brand {
    color: var(--color-accent);
}

/* Room name */
.toolbar__room-name {
    font-weight: 600;
    font-size: 13px;
    color: var(--color-text-primary);
    max-width: 160px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    user-select: none;
}

/* Separator */
.toolbar__separator {
    width: 1px;
    height: 20px;
    background: var(--color-border);
    margin: 0 var(--space-xs);
    flex-shrink: 0;
}

/* Color picker */
.toolbar__color-wrapper {
    position: relative;
    width: 28px;
    height: 28px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    cursor: pointer;
}

.toolbar__color-input {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
    border: none;
    padding: 0;
}

.toolbar__color-swatch {
    width: 100%;
    height: 100%;
    border-radius: var(--radius-sm);
    background: #1a1a2e;
    border: 2px solid var(--color-border);
    pointer-events: none;
    transition: border-color var(--transition-fast);
}

.toolbar__color-wrapper:hover .toolbar__color-swatch {
    border-color: var(--color-accent);
}

/* Stroke width select */
.toolbar__select {
    height: 28px;
    padding: 0 var(--space-sm);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-surface);
    color: var(--color-text-secondary);
    font-size: 12px;
    cursor: pointer;
    outline: none;
    transition: border-color var(--transition-fast);
}

.toolbar__select:hover,
.toolbar__select:focus {
    border-color: var(--color-accent);
}

/* Participant avatars */
.toolbar__participants {
    display: flex;
    align-items: center;
    gap: -4px;
}

.toolbar__avatar {
    width: 28px;
    height: 28px;
    border-radius: var(--radius-full);
    border: 2px solid var(--color-surface);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    font-weight: 600;
    color: var(--color-text-inverse);
    margin-left: -6px;
    transition: transform var(--transition-fast);
}

.toolbar__avatar:first-child {
    margin-left: 0;
}

.toolbar__avatar:hover {
    transform: scale(1.15);
    z-index: 1;
}


/* ---------------------------------------------------------------------------
   4. Canvas Container — Dot-Grid Background
   --------------------------------------------------------------------------- */
#canvas-container {
    position: absolute;
    inset: 0;
    z-index: var(--z-canvas);
    overflow: hidden;

    /* Dot-grid pattern via radial gradient */
    background-color: var(--color-canvas-bg);
    background-image: radial-gradient(circle, var(--color-dot-grid) 1px, transparent 1px);
    background-size: 24px 24px;
    background-position: 12px 12px;
}

#canvas {
    display: block;
    width: 100%;
    height: 100%;
    /* Canvas transparent so dot-grid shows through */
    /* The intrinsic 1920x1080 coords are stretched to fill viewport */
}

#cursor-overlay {
    position: absolute;
    inset: 0;
    z-index: var(--z-cursor-overlay);
    pointer-events: none;
}

/* Individual remote cursor (managed by CursorManager in canvas.js) */
.remote-cursor {
    position: absolute;
    top: 0;
    left: 0;
    pointer-events: none;
    will-change: transform;
    transition: transform 60ms linear;
    z-index: 1;
    animation: cursor-appear 150ms ease-out;
}

.remote-cursor svg {
    display: block;
    filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.25));
}

.remote-cursor__label {
    position: absolute;
    top: 18px;
    left: 12px;
    padding: 2px 8px;
    border-radius: var(--radius-full);
    font-size: 11px;
    font-weight: 600;
    color: #fff;
    white-space: nowrap;
    user-select: none;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.2);
    line-height: 1.4;
}

@keyframes cursor-appear {
    from {
        opacity: 0;
        transform: scale(0.7);
    }

    to {
        opacity: 1;
        transform: scale(1);
    }
}


/* ---------------------------------------------------------------------------
   5. Sidebar — Slide-out Overlay (hidden by default)
   --------------------------------------------------------------------------- */
.sidebar {
    position: fixed;
    top: 0;
    right: 0;
    width: 280px;
    height: 100%;
    z-index: var(--z-sidebar);

    background: var(--sidebar-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-left: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);

    transform: translateX(100%);
    transition: transform var(--transition-smooth);

    display: flex;
    flex-direction: column;
}

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

.sidebar[aria-hidden="true"] {
    transform: translateX(100%);
}

.sidebar__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-lg) var(--space-xl);
    border-bottom: 1px solid var(--color-border-subtle);
}

.sidebar__title {
    font-size: 15px;
    font-weight: 600;
    color: var(--color-text-primary);
}

.sidebar__close {
    width: 28px;
    height: 28px;
}

.sidebar__list {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-sm) var(--space-md);
}

.sidebar__list-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    transition: background var(--transition-fast);
}

.sidebar__list-item:hover {
    background: var(--color-surface-hover);
}

.sidebar__list-avatar {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text-inverse);
    flex-shrink: 0;
}

.sidebar__list-name {
    font-size: 13px;
    font-weight: 500;
    color: var(--color-text-primary);
}


/* ---------------------------------------------------------------------------
   6. Status Bar
   --------------------------------------------------------------------------- */
#status-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: var(--z-status-bar);
    height: 28px;

    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--space-md);

    background: var(--status-bar-bg);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-top: 1px solid var(--color-border-subtle);

    font-size: 12px;
    color: var(--color-text-tertiary);
    user-select: none;
}

.status-bar__section {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.status-bar__section--center {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
}

.status-bar__indicator {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.status-bar__dot {
    width: 7px;
    height: 7px;
    border-radius: var(--radius-full);
    flex-shrink: 0;
}

.status-bar__indicator--connected .status-bar__dot {
    background: var(--color-success);
    box-shadow: 0 0 6px rgba(45, 157, 92, 0.5);
    animation: pulse-dot 2s ease-in-out infinite;
}

.status-bar__indicator--disconnected .status-bar__dot {
    background: var(--color-error);
}

.status-bar__indicator--connecting .status-bar__dot {
    background: var(--color-warning);
    animation: pulse-dot 1s ease-in-out infinite;
}

@keyframes pulse-dot {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.5;
    }
}

.status-bar__room {
    font-weight: 500;
    color: var(--color-text-secondary);
}

.status-bar__save {
    color: var(--color-text-tertiary);
}

.status-bar__users {
    color: var(--color-text-secondary);
    font-weight: 500;
}


/* ---------------------------------------------------------------------------
   7. Modal — Room Join / Create
   --------------------------------------------------------------------------- */
.modal {
    position: fixed;
    inset: 0;
    z-index: var(--z-modal);

    display: flex;
    align-items: center;
    justify-content: center;

    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-smooth),
        visibility var(--transition-smooth);
}

.modal[aria-hidden="false"] {
    opacity: 1;
    visibility: visible;
}

.modal__backdrop {
    position: absolute;
    inset: 0;
    background: var(--modal-backdrop);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

.modal__card {
    position: relative;
    width: 100%;
    max-width: 400px;
    margin: var(--space-xl);
    padding: var(--space-2xl);

    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);

    transform: translateY(8px);
    transition: transform var(--transition-smooth);
}

.modal[aria-hidden="false"] .modal__card {
    transform: translateY(0);
}

.modal__tabs {
    display: flex;
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
    border-bottom: 2px solid var(--color-border);
}

.modal__tab {
    padding: var(--space-sm) 0;
    font-size: 16px;
    font-weight: 600;
    color: var(--color-text-secondary);
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    cursor: pointer;
    transition: color var(--transition-fast), border-color var(--transition-fast);
}

.modal__tab:hover {
    color: var(--color-text-primary);
}

.modal__tab.active {
    color: var(--color-accent);
    border-bottom-color: var(--color-accent);
}

.modal__title {
    font-size: 20px;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--space-xs);
}

.modal__subtitle {
    font-size: 13px;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-xl);
}

.modal__form {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.modal__field {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.modal__label {
    font-size: 12px;
    font-weight: 600;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.modal__input {
    height: 40px;
    padding: 0 var(--space-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-bg);
    color: var(--color-text-primary);
    font-size: 14px;
    outline: none;
    transition: border-color var(--transition-fast),
        box-shadow var(--transition-fast);
}

.modal__input:focus {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px var(--color-accent-light);
}

.modal__input::placeholder {
    color: var(--color-text-tertiary);
}

.modal__error {
    font-size: 12px;
    color: var(--color-error);
    min-height: 18px;
}

.modal__actions {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    margin-top: var(--space-sm);
}

.modal__btn {
    height: 42px;
    border: none;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: background var(--transition-fast),
        transform var(--transition-fast),
        box-shadow var(--transition-fast);
}

.modal__btn:active {
    transform: scale(0.98);
}

.modal__btn--primary {
    background: var(--color-accent);
    color: var(--color-text-inverse);
}

.modal__btn--primary:hover {
    background: var(--color-accent-hover);
    box-shadow: 0 4px 12px rgba(91, 95, 199, 0.3);
}

.modal__btn--secondary {
    background: var(--color-surface-hover);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
}

.modal__btn--secondary:hover {
    background: var(--color-surface-active);
}


/* ---------------------------------------------------------------------------
   8. Utility Classes
   --------------------------------------------------------------------------- */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Cursor chat bubble (Day 8 — speech bubble overlay, auto-dismiss after 4s) */
.cursor-chat-bubble {
    position: absolute;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-md) var(--radius-md) var(--radius-md) 4px;
    font-size: 12px;
    font-weight: 500;
    color: var(--color-text-inverse);
    white-space: normal;
    width: 200px;
    pointer-events: none;
    display: flex;
    flex-direction: column;
    gap: 2px;
    animation: bubble-appear 200ms ease-out;
}

.cursor-chat-bubble__message {
    font-size: 12px;
    font-weight: 500;
    line-height: 1.35;
    word-break: break-word;
    white-space: pre-wrap;
}

@keyframes bubble-appear {
    from {
        opacity: 0;
        transform: translateY(4px) scale(0.95);
    }

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

@keyframes bubble-fade {

    0%,
    80% {
        opacity: 1;
    }

    100% {
        opacity: 0;
    }
}

/* Cursor chat input (Day 8 — floating text entry triggered by / key) */
.cursor-chat-input-wrapper {
    position: absolute;
    z-index: 15;
    /* above cursor-overlay (10), below toolbar (100) */
    pointer-events: none;
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    animation: bubble-appear 150ms ease-out;
}

.cursor-chat-input-slash {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    border-radius: var(--radius-sm);
    background: var(--color-accent);
    color: var(--color-text-inverse);
    font-size: 13px;
    font-weight: 700;
    font-family: var(--font-mono);
    flex-shrink: 0;
    box-shadow: var(--shadow-sm);
}

.cursor-chat-input {
    width: 220px;
    min-height: 32px;
    height: auto;
    padding: 6px var(--space-md);
    border: 2px solid var(--color-accent);
    border-radius: var(--radius-md);
    background: var(--color-surface);
    color: var(--color-text-primary);
    font-size: 13px;
    font-family: var(--font-primary);
    outline: none;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.12), 0 0 0 1px var(--color-accent-light);
    transition: box-shadow var(--transition-fast);
    resize: none;
    overflow: hidden;
}

.cursor-chat-input:focus {
    box-shadow: 0 4px 24px rgba(91, 95, 199, 0.25), 0 0 0 3px var(--color-accent-light);
}

.cursor-chat-input::placeholder {
    color: var(--color-text-tertiary);
    font-size: 12px;
}

/* Toast notification (future use) */
.toast {
    position: fixed;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-md);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    font-size: 13px;
    color: var(--color-text-primary);
    opacity: 0;
    transition: opacity var(--transition-normal),
        transform var(--transition-normal);
    z-index: var(--z-modal);
}

.toast.visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}
/* ---------------------------------------------------------------------------
   9. Dropdown & Popover Menus (Sprint 1)
   --------------------------------------------------------------------------- */

/* Dropdown */
.dropdown {
    position: absolute;
    top: calc(100% + var(--space-xs));
    right: 0;
    min-width: 160px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    padding: var(--space-xs);
    display: flex;
    flex-direction: column;
    z-index: 200;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-4px);
    transition: opacity var(--transition-fast), transform var(--transition-fast), visibility var(--transition-fast);
}

.dropdown[aria-hidden="false"] {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown__item {
    padding: var(--space-sm) var(--space-md);
    text-align: left;
    font-size: 13px;
    font-weight: 500;
    color: var(--color-text-primary);
    border-radius: var(--radius-sm);
    transition: background var(--transition-fast);
}

.dropdown__item:hover {
    background: var(--color-surface-hover);
}

/* Popover for shapes */
.popover {
    position: absolute;
    top: calc(100% + var(--space-xs));
    left: 50%;
    transform: translateX(-50%) translateY(-4px);
    background: var(--toolbar-bg);
    backdrop-filter: blur(var(--toolbar-blur));
    -webkit-backdrop-filter: blur(var(--toolbar-blur));
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: var(--space-sm);
    display: flex;
    gap: 2px;
    z-index: 200;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-fast), transform var(--transition-fast), visibility var(--transition-fast);
}

.popover[aria-hidden="false"] {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.popover__item {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    transition: background var(--transition-fast), color var(--transition-fast);
}

.popover__item:hover {
    background: var(--color-surface-hover);
    color: var(--color-text-primary);
}