/* =========================================================
   canvas + toolbar
   header-icon-btn / mode-toggle-btn live in header.css — do
   not redefine here.
   ========================================================= */

.main-content {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

/* ----- floating bottom toolbar (pill) ----- */

.toolbar {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateZ(0);
    -webkit-transform: translateX(-50%) translateZ(0);
    padding: 0.75rem 1.125rem;
    background-color: var(--glass-bg);
    backdrop-filter: blur(20px) saturate(150%);
    -webkit-backdrop-filter: blur(20px) saturate(150%);
    display: flex;
    align-items: center;
    gap: 0.625rem;
    border: 1.5px solid rgba(255, 255, 255, 0.7);
    border-radius: var(--radius-full);
    box-shadow:
        var(--shadow-xl),
        var(--inset-highlight);
    z-index: 60;
    pointer-events: auto;
    width: max-content;
    transition:
        transform var(--transition-normal) var(--spring),
        box-shadow var(--transition-normal) var(--smooth);
}

.tool-section {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    flex-wrap: wrap;
}

/* ----- floating apply / discard bar ----- */

.floating-action-bar {
    position: fixed;
    bottom: 96px;
    right: 22px;
    display: flex;
    flex-direction: column;
    gap: 0.625rem;
    background-color: var(--glass-bg);
    backdrop-filter: blur(20px) saturate(150%);
    -webkit-backdrop-filter: blur(20px) saturate(150%);
    padding: 0.625rem;
    border-radius: var(--radius-xl);
    border: 1.5px solid rgba(255, 255, 255, 0.7);
    box-shadow: var(--shadow-xl), var(--inset-highlight);
    z-index: 65;
    pointer-events: auto;
    animation: bounce-in 0.42s var(--spring);
}

@keyframes bounce-in {
    0%   { transform: scale(0.6) translateY(20px); opacity: 0; }
    60%  { transform: scale(1.06) translateY(-3px); opacity: 1; }
    100% { transform: scale(1) translateY(0); }
}

/* ----- tool buttons (eraser, color pick, palettes, etc) ----- */

.tool-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1.5px solid var(--border-light);
    padding: 0.5rem 0.875rem;
    border-radius: var(--radius-full);
    font-family: var(--font-body);
    font-size: 0.82rem;
    font-weight: 700;
    cursor: pointer;
    transition:
        transform var(--transition-fast) var(--spring),
        background var(--transition-normal) var(--smooth),
        color var(--transition-normal) var(--smooth),
        border-color var(--transition-normal) var(--smooth),
        box-shadow var(--transition-normal) var(--smooth);
    box-shadow: var(--shadow-sm);
    will-change: transform;
}

.tool-btn:hover:not(:disabled) {
    transform: translateY(-2px) scale(1.04);
    background: var(--lavender-100);
    border-color: var(--lavender-300);
    color: var(--lavender-600);
    box-shadow: var(--shadow-md);
}

.tool-btn:active:not(:disabled) {
    transform: translateY(0) scale(0.97);
}

.tool-btn:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

.tool-btn.active {
    background: linear-gradient(180deg, var(--lavender-400), var(--lavender-500));
    color: var(--text-on-primary);
    border-color: transparent;
    box-shadow: var(--shadow-md), var(--glow-lavender), var(--inset-highlight);
}

.tool-btn i {
    font-size: 0.85rem;
}

/* ----- brush size picker (1x1 / 2x2 / 3x3) ----- */

.brush-size-picker {
    display: inline-flex;
    align-items: center;
    background: var(--cream-100);
    border-radius: var(--radius-full);
    padding: 3px;
    border: 1.5px solid var(--border-light);
}

.size-btn {
    width: 1.95rem;
    height: 1.95rem;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-family: var(--font-display);
    font-size: 0.85rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition:
        background var(--transition-fast) var(--smooth),
        color var(--transition-fast) var(--smooth),
        transform var(--transition-fast) var(--spring);
}

.size-btn:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
    transform: scale(1.08);
}

.size-btn.active {
    background: linear-gradient(180deg, var(--peach-400), var(--peach-500));
    color: var(--text-on-primary);
    box-shadow: var(--shadow-sm), var(--inset-highlight);
}

/* ----- selected color chip ----- */

.selected-color-display {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.25rem 0.625rem 0.25rem 0.75rem;
    background: var(--cream-100);
    border-radius: var(--radius-full);
    border: 1.5px solid var(--border-light);
}

.color-label {
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

#selected-color {
    width: 1.6rem;
    height: 1.6rem;
    border-radius: var(--radius-full);
    border: 2.5px solid #fff;
    box-shadow:
        var(--shadow-sm),
        0 0 0 1.5px var(--border-medium);
    transition: transform var(--transition-fast) var(--spring);
}

#selected-color:hover {
    transform: scale(1.12) rotate(-6deg);
}

/* ----- edit-mode extras (continuous draw, pending count, undo) ----- */

.edit-mode-actions {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    margin-left: 0.5rem;
    padding-left: 0.625rem;
    border-left: 1.5px dashed var(--border-medium);
}

.pending-changes-info {
    font-family: var(--font-display);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--peach-700);
    background: var(--peach-100);
    padding: 0.3rem 0.75rem;
    border-radius: var(--radius-full);
    border: 1.5px solid var(--peach-200);
}

/* ----- action buttons (apply / discard / undo) ----- */

.action-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    border: none;
    padding: 0.55rem 1rem;
    border-radius: var(--radius-full);
    cursor: pointer;
    font-family: var(--font-body);
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--text-on-primary);
    transition:
        transform var(--transition-fast) var(--spring),
        box-shadow var(--transition-normal) var(--smooth),
        background var(--transition-normal) var(--smooth);
    box-shadow: var(--shadow-md), var(--inset-highlight);
    will-change: transform;
}

.action-btn:hover:not(:disabled) {
    transform: translateY(-2px) scale(1.04);
    box-shadow: var(--shadow-lg), var(--inset-highlight);
}

.action-btn:active:not(:disabled) {
    transform: translateY(0) scale(0.97);
}

.action-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.apply-btn {
    background: linear-gradient(180deg, var(--mint-400), var(--mint-500));
}

.apply-btn:hover:not(:disabled) {
    box-shadow: var(--shadow-lg), var(--inset-highlight), var(--glow-mint);
}

/* breathing glow when there are pending changes worth saving */
.apply-btn.glow {
    animation: glow-pulse 1.8s ease-in-out infinite;
}

@keyframes glow-pulse {
    0%, 100% { box-shadow: var(--shadow-md), var(--inset-highlight), 0 0 0 0 rgba(78, 205, 196, 0.5); }
    50%      { box-shadow: var(--shadow-lg), var(--inset-highlight), 0 0 0 10px rgba(78, 205, 196, 0); }
}

.discard-btn {
    background: linear-gradient(180deg, var(--peach-400), var(--peach-500));
}

.discard-btn:hover:not(:disabled) {
    box-shadow: var(--shadow-lg), var(--inset-highlight), var(--glow-peach);
}

/* ----- canvas container ----- */

.canvas-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    /* let the body gradient show through; the canvas sits on top.
       a subtle warm wash so the canvas edges don't look bare. */
    background:
        radial-gradient(120% 80% at 50% 50%, rgba(255, 250, 245, 0.4), transparent 70%);
    z-index: 10;
    /* Hand all touch gestures to the app's JS (pan + pinch-zoom). Without this
       Android Chrome treats a canvas pinch as browser page-zoom, scaling the
       fixed header/toolbar off-screen. touch-action does NOT inherit, so it
       must be set here, not just on <html>. */
    touch-action: none;
}

#pixel-canvas {
    position: absolute;
    top: 0;
    left: 0;
    image-rendering: pixelated;
    cursor: crosshair;
    touch-action: none;
}

.canvas-container.panning #pixel-canvas {
    cursor: grabbing;
}

.canvas-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 20;
}

/* ----- multiplayer cursors ----- */

#multiplayer-cursors {
    z-index: 25;
}

.remote-cursor {
    position: absolute;
    top: 0;
    left: 0;
    pointer-events: none;
    will-change: transform;
    transition: opacity var(--transition-normal) ease;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    opacity: 1;
}

.remote-cursor.fade-out {
    opacity: 0;
}

.remote-cursor-pointer {
    width: 14px;
    height: 14px;
    margin-left: -7px;
    margin-top: -7px;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.3));
    z-index: 2;
}

.remote-cursor-info {
    display: flex;
    align-items: center;
    gap: 4px;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    border-radius: var(--radius-full);
    padding: 2px 6px 2px 2px;
    margin-top: 4px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.2);
    border: 1px solid rgba(255,255,255,0.1);
}

.remote-cursor-avatar {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--cream-100);
    overflow: hidden;
    flex-shrink: 0;
}

.remote-cursor-name {
    font-family: var(--font-display);
    font-size: 0.65rem;
    font-weight: 600;
    color: white;
    white-space: nowrap;
}