/* CollabFlow - Main Stylesheet */

/* ============================================
   CSS Custom Properties (Theme)
   ============================================ */

:root {
    /* Fonts */
    --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
    --font-mono: 'SF Mono', 'Fira Code', monospace;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;

    /* Spacing */
    --toolbar-height: 48px;
    --sidebar-width: 220px;
    --panel-width: 260px;

    /* Radius */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.12);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.2);
}

/* Dark theme (default) */
[data-theme="dark"] {
    --bg-primary: #0f0f0f;
    --bg-secondary: #1a1a1a;
    --bg-tertiary: #252525;
    --bg-hover: #2a2a2a;
    --bg-active: #333333;

    --border-primary: #2a2a2a;
    --border-secondary: #3a3a3a;
    --border-focus: #525252;

    --text-primary: #e5e5e5;
    --text-secondary: #a0a0a0;
    --text-tertiary: #707070;
    --text-inverse: #0f0f0f;

    --accent: #3B82F6;
    --accent-hover: #2563EB;
    --accent-soft: rgba(59, 130, 246, 0.15);
    --accent-text: #60A5FA;

    --danger: #EF4444;
    --danger-soft: rgba(239, 68, 68, 0.15);
    --success: #10B981;
    --warning: #F59E0B;

    --grid-line: rgba(255, 255, 255, 0.04);
    --grid-line-bold: rgba(255, 255, 255, 0.08);

    --shape-fill: #1e1e1e;
    --shape-fill-alt: #1a1a2e;
    --shape-fill-accent: #0f1a2e;
    --shape-stroke: #404040;

    --canvas-bg: #0a0a0a;

    --selection-color: #3B82F6;
    --selection-fill: rgba(59, 130, 246, 0.08);

    --scrollbar-thumb: #333;
    --scrollbar-track: #1a1a1a;
}

/* Light theme */
[data-theme="light"] {
    --bg-primary: #ffffff;
    --bg-secondary: #f5f5f5;
    --bg-tertiary: #ebebeb;
    --bg-hover: #f0f0f0;
    --bg-active: #e5e5e5;

    --border-primary: #e5e5e5;
    --border-secondary: #d4d4d4;
    --border-focus: #a3a3a3;

    --text-primary: #171717;
    --text-secondary: #525252;
    --text-tertiary: #a3a3a3;
    --text-inverse: #ffffff;

    --accent: #2563EB;
    --accent-hover: #1D4ED8;
    --accent-soft: rgba(37, 99, 235, 0.1);
    --accent-text: #1D4ED8;

    --danger: #DC2626;
    --danger-soft: rgba(220, 38, 38, 0.1);
    --success: #059669;
    --warning: #D97706;

    --grid-line: rgba(0, 0, 0, 0.06);
    --grid-line-bold: rgba(0, 0, 0, 0.1);

    --shape-fill: #ffffff;
    --shape-fill-alt: #f0f4ff;
    --shape-fill-accent: #eff6ff;
    --shape-stroke: #d4d4d4;

    --canvas-bg: #fafafa;

    --selection-color: #2563EB;
    --selection-fill: rgba(37, 99, 235, 0.06);

    --scrollbar-thumb: #ccc;
    --scrollbar-track: #f5f5f5;
}

/* ============================================
   Reset & Base
   ============================================ */

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

html, body {
    height: 100%;
    overflow: hidden;
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    -webkit-font-smoothing: antialiased;
}

::selection {
    background: var(--accent-soft);
    color: var(--accent-text);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: var(--scrollbar-track);
}
::-webkit-scrollbar-thumb {
    background: var(--scrollbar-thumb);
    border-radius: 3px;
}

/* ============================================
   App Layout
   ============================================ */

#app {
    display: flex;
    flex-direction: column;
    height: 100vh;
    width: 100vw;
}

/* ============================================
   Top Toolbar
   ============================================ */

#toolbar {
    display: flex;
    align-items: center;
    height: var(--toolbar-height);
    padding: 0 12px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-primary);
    gap: 8px;
    z-index: 100;
    flex-shrink: 0;
}

.toolbar-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    padding-right: 12px;
    border-right: 1px solid var(--border-primary);
    margin-right: 4px;
    user-select: none;
}

.toolbar-logo svg {
    width: 22px;
    height: 22px;
    color: var(--accent);
}

.toolbar-logo span {
    font-weight: 600;
    font-size: 14px;
    letter-spacing: -0.01em;
}

.toolbar-group {
    display: flex;
    align-items: center;
    gap: 2px;
    padding: 0 4px;
}

.toolbar-separator {
    width: 1px;
    height: 24px;
    background: var(--border-primary);
    margin: 0 6px;
}

.toolbar-spacer {
    flex: 1;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 6px 10px;
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--text-secondary);
    font-family: var(--font-sans);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
    user-select: none;
}

.btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.btn:active {
    background: var(--bg-active);
}

.btn.active {
    background: var(--accent-soft);
    color: var(--accent-text);
    border-color: var(--accent);
}

.btn-icon {
    padding: 6px;
    width: 32px;
    height: 32px;
}

.btn-icon svg {
    width: 16px;
    height: 16px;
}

.btn-primary {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
}

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

.btn-danger {
    color: var(--danger);
}

.btn-danger:hover {
    background: var(--danger-soft);
    color: var(--danger);
}

/* ============================================
   Main Content Area
   ============================================ */

#main-content {
    display: flex;
    flex: 1;
    overflow: hidden;
}

/* ============================================
   Left Sidebar (Shape Palette)
   ============================================ */

#sidebar {
    width: var(--sidebar-width);
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-primary);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    z-index: 50;
}

.sidebar-header {
    padding: 12px 16px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-tertiary);
    border-bottom: 1px solid var(--border-primary);
}

.shape-palette {
    padding: 12px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    overflow-y: auto;
}

.shape-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: var(--radius-md);
    cursor: grab;
    transition: all var(--transition-fast);
    border: 1px solid transparent;
    user-select: none;
}

.shape-item:hover {
    background: var(--bg-hover);
    border-color: var(--border-secondary);
}

.shape-item:active {
    cursor: grabbing;
    background: var(--bg-active);
}

.shape-item.active {
    background: var(--accent-soft);
    border-color: var(--accent);
}

.shape-preview {
    width: 36px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.shape-preview svg {
    width: 100%;
    height: 100%;
}

.shape-info {
    display: flex;
    flex-direction: column;
    gap: 1px;
}

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

.shape-desc {
    font-size: 11px;
    color: var(--text-tertiary);
}

/* ============================================
   Canvas Area
   ============================================ */

#canvas-wrapper {
    flex: 1;
    position: relative;
    overflow: hidden;
    background: var(--canvas-bg);
}

#canvas {
    width: 100%;
    height: 100%;
    display: block;
    cursor: default;
}

#canvas.cursor-crosshair {
    cursor: crosshair;
}

#canvas.cursor-grab {
    cursor: grab;
}

#canvas.cursor-grabbing {
    cursor: grabbing;
}

#canvas.cursor-connecting {
    cursor: crosshair;
}

/* Grid background */
#grid-bg {
    x: -10000;
    y: -10000;
    width: 20000;
    height: 20000;
}

/* Shape SVG styles */
.flowchart-element {
    cursor: pointer;
    transition: filter var(--transition-fast);
}

.flowchart-element:hover .shape-body {
    filter: brightness(1.05);
}

.flowchart-element.selected .shape-body {
    stroke: var(--selection-color) !important;
    stroke-width: 2.5 !important;
}

.shape-text {
    user-select: none;
}

/* Ports */
.port {
    opacity: 0;
    cursor: crosshair;
    transition: opacity var(--transition-fast), r var(--transition-fast);
}

.flowchart-element:hover .port {
    opacity: 1;
}

.port:hover {
    r: 8;
    opacity: 1;
}

/* Connection paths */
.connection-path {
    fill: none;
    stroke: var(--shape-stroke);
    stroke-width: 2;
    cursor: pointer;
    transition: stroke var(--transition-fast);
}

.connection-path:hover {
    stroke: var(--accent);
    stroke-width: 2.5;
}

.connection-path.selected {
    stroke: var(--selection-color);
    stroke-width: 2.5;
}

.connection-label {
    font-size: 12px;
    fill: var(--text-secondary);
    font-family: var(--font-sans);
    pointer-events: all;
    cursor: pointer;
}

.connection-label-bg {
    fill: var(--canvas-bg);
    rx: 3;
}

/* Temp connection line (while dragging) */
.temp-connection {
    fill: none;
    stroke: var(--accent);
    stroke-width: 2;
    stroke-dasharray: 6, 4;
    pointer-events: none;
    opacity: 0.7;
}

/* Selection rubber band */
.rubber-band {
    fill: var(--selection-fill);
    stroke: var(--selection-color);
    stroke-width: 1;
    stroke-dasharray: 4, 3;
    pointer-events: none;
}

/* Selection handles */
.selection-handle {
    fill: var(--bg-primary);
    stroke: var(--selection-color);
    stroke-width: 1.5;
    cursor: nwse-resize;
}

/* Remote cursors */
.remote-cursor {
    pointer-events: none;
    transition: transform 0.1s linear;
}

.remote-cursor-pointer {
    filter: drop-shadow(0 1px 2px rgba(0,0,0,0.3));
}

.remote-cursor-label {
    font-size: 11px;
    font-family: var(--font-sans);
    font-weight: 500;
    fill: white;
}

.remote-cursor-label-bg {
    rx: 4;
}

/* ============================================
   Right Panel (Properties)
   ============================================ */

#properties-panel {
    width: var(--panel-width);
    background: var(--bg-secondary);
    border-left: 1px solid var(--border-primary);
    display: none;
    flex-direction: column;
    flex-shrink: 0;
    overflow-y: auto;
    z-index: 50;
}

#properties-panel.visible {
    display: flex;
}

.panel-header {
    padding: 12px 16px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-tertiary);
    border-bottom: 1px solid var(--border-primary);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.panel-section {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-primary);
}

.panel-section-title {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-tertiary);
    margin-bottom: 10px;
}

.prop-row {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
}

.prop-label {
    font-size: 12px;
    color: var(--text-secondary);
    min-width: 60px;
    flex-shrink: 0;
}

.prop-input {
    flex: 1;
    padding: 5px 8px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 12px;
    outline: none;
    transition: border-color var(--transition-fast);
}

.prop-input:focus {
    border-color: var(--accent);
}

.prop-input[type="color"] {
    padding: 2px;
    width: 32px;
    height: 28px;
    cursor: pointer;
}

.prop-input[type="number"] {
    width: 60px;
    flex: none;
}

/* ============================================
   Status Bar
   ============================================ */

#status-bar {
    display: flex;
    align-items: center;
    height: 28px;
    padding: 0 12px;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-primary);
    font-size: 11px;
    color: var(--text-tertiary);
    gap: 16px;
    z-index: 100;
    flex-shrink: 0;
}

.status-item {
    display: flex;
    align-items: center;
    gap: 4px;
}

.status-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--success);
}

.status-dot.offline {
    background: var(--text-tertiary);
}

#zoom-controls {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-left: auto;
}

#zoom-controls .btn-icon {
    width: 24px;
    height: 24px;
    padding: 4px;
}

#zoom-controls .btn-icon svg {
    width: 12px;
    height: 12px;
}

#zoom-level {
    font-size: 11px;
    min-width: 36px;
    text-align: center;
    font-variant-numeric: tabular-nums;
}

/* ============================================
   Dropdown Menus
   ============================================ */

.dropdown-menu {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 4px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    padding: 4px;
    min-width: 160px;
    display: none;
    z-index: 200;
}

.dropdown-menu.visible {
    display: block;
}

.dropdown-menu .btn {
    width: 100%;
    justify-content: flex-start;
    padding: 8px 12px;
}

.dropdown-menu .dropdown-divider {
    height: 1px;
    background: var(--border-primary);
    margin: 4px 0;
}

/* ============================================
   Modals
   ============================================ */

.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    backdrop-filter: blur(4px);
}

.modal-overlay.visible {
    display: flex;
}

.modal {
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: 24px;
    max-width: 440px;
    width: 90%;
    animation: modalIn 0.2s ease;
}

@keyframes modalIn {
    from { opacity: 0; transform: scale(0.95) translateY(8px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
}

.modal-body {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    margin-top: 20px;
}

.modal-input {
    width: 100%;
    padding: 10px 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 14px;
    outline: none;
    margin-bottom: 12px;
}

.modal-input:focus {
    border-color: var(--accent);
}

/* Room code display */
.room-code {
    font-family: var(--font-mono);
    font-size: 28px;
    font-weight: 700;
    letter-spacing: 0.15em;
    text-align: center;
    padding: 16px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    margin: 12px 0;
    color: var(--accent-text);
    user-select: all;
}

.room-link {
    font-size: 12px;
    color: var(--text-tertiary);
    text-align: center;
    word-break: break-all;
    padding: 8px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    margin-bottom: 12px;
    font-family: var(--font-mono);
    user-select: all;
}

#qr-container {
    display: flex;
    justify-content: center;
    padding: 16px;
    background: white;
    border-radius: var(--radius-md);
    margin: 12px 0;
}

/* ============================================
   Toast / Notifications
   ============================================ */

#toast-container {
    position: fixed;
    bottom: 48px;
    right: 16px;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.toast {
    padding: 10px 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    font-size: 13px;
    color: var(--text-primary);
    animation: toastIn 0.3s ease;
    max-width: 320px;
}

.toast.toast-exit {
    animation: toastOut 0.2s ease forwards;
}

@keyframes toastIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes toastOut {
    from { opacity: 1; transform: translateY(0); }
    to { opacity: 0; transform: translateY(8px); }
}

/* ============================================
   Minimap
   ============================================ */

#minimap {
    position: absolute;
    bottom: 8px;
    right: 8px;
    width: 180px;
    height: 120px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    overflow: hidden;
    z-index: 50;
    opacity: 0.85;
    transition: opacity var(--transition-fast);
}

#minimap:hover {
    opacity: 1;
}

#minimap svg {
    width: 100%;
    height: 100%;
}

.minimap-viewport {
    fill: var(--accent-soft);
    stroke: var(--accent);
    stroke-width: 1;
}

/* ============================================
   Users / Presence
   ============================================ */

.users-bar {
    display: flex;
    align-items: center;
    gap: 4px;
}

.user-avatar {
    width: 26px;
    height: 26px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    font-weight: 600;
    color: white;
    border: 2px solid var(--bg-secondary);
    flex-shrink: 0;
    cursor: default;
    position: relative;
}

.user-avatar:not(:first-child) {
    margin-left: -6px;
}

.user-tooltip {
    position: absolute;
    bottom: -28px;
    left: 50%;
    transform: translateX(-50%);
    padding: 3px 8px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    font-size: 11px;
    white-space: nowrap;
    pointer-events: none;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.user-avatar:hover .user-tooltip {
    opacity: 1;
}

/* ============================================
   Inline text editor
   ============================================ */

.inline-editor {
    background: transparent;
    border: none;
    outline: none;
    text-align: center;
    font-family: var(--font-sans);
    color: var(--text-primary);
    width: 100%;
    height: 100%;
    resize: none;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ============================================
   Responsive
   ============================================ */

@media (max-width: 768px) {
    #sidebar {
        display: none;
    }

    #properties-panel {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        width: 100%;
        max-height: 50vh;
        border-left: none;
        border-top: 1px solid var(--border-primary);
        border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    }

    :root {
        --toolbar-height: 44px;
    }
}