/* ============================================================================
   INFINITE WHITEBOARD - COMPLETE STYLES
   ============================================================================ */

:root {
    --bg-primary: #0F0F14;
    --bg-secondary: #16161D;
    --bg-tertiary: #1E1E28;
    --bg-elevated: #252532;
    --surface-glass: rgba(30, 30, 40, 0.85);
    --surface-glass-light: rgba(40, 40, 55, 0.7);
    --surface-glass-hover: rgba(50, 50, 70, 0.8);
    --text-primary: #FAFAFF;
    --text-secondary: #A0A0B0;
    --text-tertiary: #6B6B7B;
    --text-muted: #4A4A5A;
    --accent-primary: #6366F1;
    --accent-primary-hover: #7C7FF7;
    --accent-primary-muted: rgba(99, 102, 241, 0.15);
    --accent-secondary: #8B5CF6;
    --accent-tertiary: #EC4899;
    --success: #22C55E;
    --warning: #EAB308;
    --error: #EF4444;
    --gradient-primary: linear-gradient(135deg, #6366F1 0%, #8B5CF6 100%);
    --border-subtle: rgba(255, 255, 255, 0.06);
    --border-default: rgba(255, 255, 255, 0.1);
    --border-strong: rgba(255, 255, 255, 0.15);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --z-canvas: 1;
    --z-ui: 10;
    --z-toolbar: 20;
    --z-sidebar: 30;
    --z-toast: 50;
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}

body {
    font-family: var(--font-sans);
    color: var(--text-primary);
    background: var(--bg-primary);
    overflow: hidden;
    min-height: 100vh;
}

:focus {
    outline: none;
}

:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

::selection {
    background: var(--accent-primary-muted);
}

.screen {
    position: fixed;
    inset: 0;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.screen.active {
    opacity: 1;
    visibility: visible;
}

/* LANDING SCREEN */
#landing-screen {
    display: flex;
    align-items: center;
    justify-content: center;
}

.landing-container {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.landing-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.4;
    animation: float 8s ease-in-out infinite;
}

.orb-1 {
    width: 500px;
    height: 500px;
    background: var(--accent-primary);
    top: -10%;
    right: -10%;
}

.orb-2 {
    width: 400px;
    height: 400px;
    background: var(--accent-secondary);
    bottom: -10%;
    left: -5%;
    animation-delay: -2s;
}

.orb-3 {
    width: 300px;
    height: 300px;
    background: var(--accent-tertiary);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: -4s;
}

.grid-pattern {
    position: absolute;
    inset: 0;
    background-image: linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    background-size: 50px 50px;
    mask-image: radial-gradient(ellipse at center, black 0%, transparent 70%);
}

@keyframes float {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-10px);
    }
}

.landing-content {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 900px;
    padding: var(--space-8);
    display: flex;
    flex-direction: column;
    gap: var(--space-8);
    animation: fadeInUp 0.6s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

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

.landing-header {
    text-align: center;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-4);
    margin-bottom: var(--space-4);
}

.logo-icon {
    width: 56px;
    height: 56px;
    animation: float 6s ease-in-out infinite;
}

.logo-icon svg {
    width: 100%;
    height: 100%;
}

.logo h1 {
    font-size: 2.25rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tagline {
    color: var(--text-secondary);
    font-size: 1.125rem;
}

.landing-main {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-6);
}

@media (max-width: 768px) {
    .landing-main {
        grid-template-columns: 1fr;
    }
}

.card {
    background: var(--surface-glass);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-2xl);
    padding: var(--space-8);
    box-shadow: var(--shadow-lg);
}

.card h2 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--space-6);
}

.input-group {
    margin-bottom: var(--space-5);
}

.input-group:last-child {
    margin-bottom: 0;
}

.input-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: var(--space-2);
}

.input-group input[type="text"] {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    font-size: 1rem;
    font-family: var(--font-sans);
    color: var(--text-primary);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.input-group input[type="text"]:hover {
    border-color: var(--border-strong);
}

.input-group input[type="text"]:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-primary-muted);
}

.input-group input[type="text"]::placeholder {
    color: var(--text-muted);
}

.color-picker-wrapper {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-lg);
    cursor: pointer;
}

input[type="color"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.color-preview {
    width: 28px;
    height: 28px;
    border-radius: var(--radius-md);
    background: var(--accent-primary);
    border: 2px solid rgba(255, 255, 255, 0.2);
    cursor: pointer;
    transition: transform var(--transition-base);
}

.color-preview:hover {
    transform: scale(1.1);
}

.color-hex {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-transform: uppercase;
}

.color-presets {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin-top: var(--space-3);
}

.color-preset {
    width: 28px;
    height: 28px;
    border-radius: var(--radius-md);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.color-preset:hover {
    transform: scale(1.15);
    border-color: rgba(255, 255, 255, 0.3);
}

.room-actions {
    display: flex;
    flex-direction: column;
    gap: var(--space-5);
}

.divider {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    color: var(--text-muted);
    font-size: 0.875rem;
}

.divider::before,
.divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border-subtle);
}

.join-room-section {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    font-size: 1rem;
    font-weight: 500;
    font-family: var(--font-sans);
    border-radius: var(--radius-lg);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
}

.btn svg {
    width: 20px;
    height: 20px;
}

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

.btn-large {
    padding: var(--space-4) var(--space-6);
    font-size: 1.125rem;
}

.btn-large svg {
    width: 24px;
    height: 24px;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-md), 0 0 20px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    box-shadow: var(--shadow-lg), 0 0 30px rgba(99, 102, 241, 0.5);
    transform: translateY(-2px);
}

.btn-secondary {
    background: var(--bg-elevated);
    color: var(--text-primary);
    border: 1px solid var(--border-default);
}

.btn-secondary:hover {
    background: var(--surface-glass-hover);
    border-color: var(--border-strong);
}

.landing-footer {
    text-align: center;
    color: var(--text-tertiary);
    font-size: 0.875rem;
}

/* WHITEBOARD SCREEN */
#whiteboard-screen {
    display: flex;
    flex-direction: column;
    background: var(--bg-primary);
}

.canvas-container {
    position: absolute;
    inset: 0;
    z-index: var(--z-canvas);
    overflow: hidden;
    cursor: crosshair;
}

.canvas-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

#grid-canvas {
    z-index: 1;
    pointer-events: none;
}

#drawing-canvas {
    z-index: 2;
}

#cursor-canvas {
    z-index: 3;
    pointer-events: none;
}

.toolbar.toolbar-top {
    position: fixed;
    top: var(--space-4);
    left: 50%;
    transform: translateX(-50%);
    z-index: var(--z-toolbar);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-6);
    padding: var(--space-3) var(--space-4);
    background: var(--surface-glass);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    min-width: 500px;
}

.toolbar-left,
.toolbar-center,
.toolbar-right {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.room-info {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-1) var(--space-3);
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
}

.room-label {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
}

.room-code {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--accent-primary);
    letter-spacing: 0.1em;
}

.host-badge {
    padding: var(--space-1) var(--space-2);
    background: linear-gradient(135deg, #FFD700, #FFA500);
    color: #000;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-md);
}

.zoom-controls {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-1) var(--space-2);
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
}

.zoom-level {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--text-secondary);
    min-width: 50px;
    text-align: center;
}

.users-indicator {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    background: var(--accent-primary-muted);
    border-radius: var(--radius-md);
    color: var(--accent-primary);
}

.users-indicator svg {
    width: 16px;
    height: 16px;
}

.users-indicator span {
    font-size: 0.875rem;
    font-weight: 600;
}

.toolbar.toolbar-left-side {
    position: fixed;
    left: var(--space-4);
    top: 50%;
    transform: translateY(-50%);
    z-index: var(--z-toolbar);
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    padding: var(--space-3);
    background: var(--surface-glass);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
}

.tool-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.tool-separator {
    width: 100%;
    height: 1px;
    background: var(--border-subtle);
    margin: var(--space-1) 0;
}

.tool-btn {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: var(--radius-lg);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-base);
}

.tool-btn svg {
    width: 22px;
    height: 22px;
}

.tool-btn:hover {
    background: var(--surface-glass-hover);
    color: var(--text-primary);
}

.tool-btn.active {
    background: var(--accent-primary-muted);
    color: var(--accent-primary);
}

.tool-btn:active {
    transform: scale(0.92);
}

.stroke-color-wrapper {
    position: relative;
    width: 44px;
    height: 44px;
}

.stroke-color-input {
    opacity: 0;
    position: absolute;
    width: 100%;
    height: 100%;
    cursor: pointer;
}

.stroke-color-preview {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-lg);
    border: 3px solid var(--bg-elevated);
    background: var(--accent-primary);
    pointer-events: none;
}

.stroke-width-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-2);
}

.stroke-width-input {
    width: 100%;
    height: 6px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    cursor: pointer;
}

.stroke-width-input::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    background: var(--accent-primary);
    border-radius: 50%;
    cursor: pointer;
}

.stroke-width-value {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    font-family: var(--font-mono);
}

.toolbar-btn {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-base);
}

.toolbar-btn svg {
    width: 18px;
    height: 18px;
}

.toolbar-btn:hover {
    background: var(--surface-glass-hover);
    color: var(--text-primary);
}

.toolbar-btn.small {
    width: 28px;
    height: 28px;
}

.toolbar-btn.small svg {
    width: 14px;
    height: 14px;
}

.color-presets-toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    padding: 0 var(--space-2);
    width: 90px;
    justify-content: center;
}

.color-preset-mini {
    width: 20px;
    height: 20px;
    border-radius: 4px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    cursor: pointer;
    transition: transform 0.2s;
}

.color-preset-mini:hover {
    transform: scale(1.2);
    border-color: white;
}


.sidebar {
    position: fixed;
    top: var(--space-4);
    right: var(--space-4);
    bottom: var(--space-4);
    width: 280px;
    z-index: var(--z-sidebar);
    background: var(--surface-glass);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    transform: translateX(calc(100% + var(--space-4)));
    transition: transform var(--transition-slow);
    display: flex;
    flex-direction: column;
}

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

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4);
    border-bottom: 1px solid var(--border-subtle);
}

.sidebar-header h3 {
    font-size: 1rem;
    font-weight: 600;
}

.user-list {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-2);
    list-style: none;
}

.user-list-item {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-2);
    padding: var(--space-3);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-1);
    transition: background var(--transition-fast);
}

.user-list-item:hover {
    background: var(--surface-glass-light);
}

.user-list-item .user-color {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    flex-shrink: 0;
}

.user-list-item .user-name {
    flex: 1;
    font-size: 0.875rem;
    min-width: 60px;
}

.user-list-item .user-badge {
    font-size: 0.75rem;
    padding: 2px 6px;
    border-radius: var(--radius-sm);
}

.user-list-item .you-badge {
    background: var(--accent-primary-muted);
    color: var(--accent-primary);
}

.user-list-item .permission-badge {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
}

.user-list-item .permission-badge[data-permission="admin"] {
    background: linear-gradient(135deg, #FFD700, #FFA500);
    color: #000;
}

.user-list-item .permission-badge[data-permission="read"] {
    background: var(--bg-secondary);
    color: var(--text-tertiary);
}

.user-controls {
    width: 100%;
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-top: var(--space-2);
    padding-top: var(--space-2);
    border-top: 1px solid var(--border-subtle);
}

.permission-select {
    flex: 1;
    padding: var(--space-1) var(--space-2);
    font-size: 0.75rem;
    font-family: var(--font-sans);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    cursor: pointer;
}

.kick-btn {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    border-radius: var(--radius-sm);
    color: #EF4444;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.kick-btn:hover {
    background: rgba(239, 68, 68, 0.2);
    border-color: #EF4444;
}

.kick-btn svg {
    width: 14px;
    height: 14px;
}

.toast {
    position: fixed;
    bottom: var(--space-6);
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    z-index: var(--z-toast);
    padding: var(--space-3) var(--space-5);
    background: var(--surface-glass);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-lg);
    transition: transform 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    pointer-events: none;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
}

.toast-message {
    font-size: 0.875rem;
}

.coordinates {
    position: fixed;
    bottom: var(--space-4);
    right: var(--space-4);
    z-index: var(--z-ui);
    display: flex;
    gap: var(--space-4);
    padding: var(--space-2) var(--space-3);
    background: var(--surface-glass);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

.canvas-container.tool-pen {
    cursor: crosshair;
}

.canvas-container.tool-pan {
    cursor: grab;
}

.canvas-container.tool-pan.panning {
    cursor: grabbing;
}

.canvas-container.tool-eraser {
    cursor: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%23ff6b6b' stroke-width='2'%3E%3Ccircle cx='12' cy='12' r='8'/%3E%3Cpath d='M8 8l8 8M16 8l-8 8'/%3E%3C/svg%3E") 12 12, auto;
}

@media (max-width: 768px) {
    .toolbar.toolbar-top {
        min-width: auto;
        width: calc(100% - 2rem);
        flex-wrap: wrap;
        gap: var(--space-3);
    }

    .toolbar-center {
        order: 3;
        width: 100%;
        justify-content: center;
    }

    .toolbar.toolbar-left-side {
        left: var(--space-2);
        padding: var(--space-2);
    }

    .tool-btn {
        width: 40px;
        height: 40px;
    }

    .sidebar {
        width: 100%;
        max-width: 320px;
        right: 0;
        top: 0;
        bottom: 0;
        border-radius: var(--radius-xl) 0 0 var(--radius-xl);
    }

    .landing-content {
        padding: var(--space-4);
    }

    .logo h1 {
        font-size: 1.5rem;
    }

    .card {
        padding: var(--space-5);
    }
}

/* MATRIX MODE */
#matrix-menu {
    position: fixed;
    top: 100px;
    left: 100px;
    width: 300px;
    background: rgba(0, 20, 0, 0.95);
    border: 1px solid #00FF00;
    box-shadow: 0 0 20px rgba(0, 255, 0, 0.2);
    border-radius: 8px;
    z-index: 1000;
    color: #00FF00;
    font-family: 'Courier New', monospace;
    display: none;
    flex-direction: column;
    overflow: hidden;
}

#matrix-menu.visible {
    display: flex;
}

.matrix-header {
    padding: 10px;
    background: rgba(0, 50, 0, 0.8);
    border-bottom: 1px solid #00FF00;
    cursor: move;
    font-weight: bold;
    display: flex;
    justify-content: space-between;
    align-items: center;
    user-select: none;
}

.matrix-content {
    padding: 15px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.matrix-btn {
    background: transparent;
    border: 1px solid #00FF00;
    color: #00FF00;
    padding: 8px;
    font-family: 'Courier New', monospace;
    cursor: pointer;
    transition: all 0.2s;
    text-transform: uppercase;
    font-size: 12px;
}

.matrix-btn:hover {
    background: #00FF00;
    color: black;
    box-shadow: 0 0 10px #00FF00;
}

.matrix-btn.active {
    background: #003300;
    box-shadow: inset 0 0 10px #00FF00;
}

.matrix-toast {
    background: black !important;
    border: 1px solid #00FF00 !important;
    color: #00FF00 !important;
    font-family: 'Courier New', monospace !important;
    box-shadow: 0 0 20px rgba(0, 255, 0, 0.5) !important;
}

.matrix-canvas-layer {
    opacity: 0.2;
    pointer-events: none;
}