:root {
    --bg-color: #f0f2f5;
    --toolbar-bg: white;
    --text-color: #333;
    --modal-bg: white;
    --input-border: #ddd;
    --card-shadow: rgba(0,0,0,0.1);
    --grid-color: #e8e8e8;
    --connector-color: #aaa;
}

[data-theme="dark"] {
    --bg-color: #1a1a1a;
    --toolbar-bg: #2d2d2d;
    --text-color: #e0e0e0;
    --modal-bg: #2d2d2d;
    --input-border: #444;
    --card-shadow: rgba(0,0,0,0.5);
    --grid-color: #2a2a2a;
    --connector-color: #555;
}

body, html {
    margin: 0;
    padding: 0;
    overflow: hidden;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color 0.3s, color 0.3s;
    touch-action: none; /* Sayfa kaymasını global olarak engelle */
}

#canvas {
    display: block;
    cursor: grab;
    touch-action: none; /* Canvas üzerinde tarayıcı hareketlerini devre dışı bırak */
}

#canvas:active {
    cursor: grabbing;
}

#toolbar {
    position: absolute;
    top: 20px;
    left: 20px;
    background: var(--toolbar-bg);
    padding: 10px;
    border-radius: 8px;
    box-shadow: 0 4px 6px var(--card-shadow);
    z-index: 100;
    display: flex;
    gap: 10px;
    align-items: center;
    transition: background-color 0.3s;
}

button {
    padding: 8px 15px;
    border: none;
    border-radius: 4px;
    background-color: #007bff;
    color: white;
    cursor: pointer;
    transition: background 0.2s;
}

button:hover {
    background-color: #0056b3;
}

.hidden {
    display: none !important;
}

#auth-container {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.auth-card {
    background: var(--modal-bg);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 10px 25px var(--card-shadow);
    width: 350px;
}

.auth-card input {
    width: 100%;
    padding: 10px;
    margin-bottom: 15px;
    background: var(--modal-bg);
    color: var(--text-color);
    border: 1px solid var(--input-border);
    border-radius: 4px;
    box-sizing: border-box;
}

/* Sidebar Styles */
#sidebar {
    position: fixed;
    top: 0;
    right: 0;
    width: 300px;
    height: 100vh;
    background-color: var(--toolbar-bg);
    box-shadow: -4px 0 15px var(--card-shadow);
    z-index: 1000;
    transition: transform 0.3s ease-in-out;
    display: flex;
    flex-direction: column;
}

.sidebar-hidden {
    transform: translateX(100%);
}

.sidebar-header {
    padding: 20px;
    border-bottom: 1px solid var(--input-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

#close-sidebar {
    background: transparent;
    color: var(--text-color);
    font-size: 24px;
    padding: 0;
    cursor: pointer;
}

#hierarchy-container {
    padding: 15px;
    overflow-y: auto;
    flex-grow: 1;
}

/* Hierarchy Tree View */
.hierarchy-list {
    list-style: none;
    padding-left: 15px;
    margin: 5px 0;
}

.hierarchy-item {
    padding: 8px 12px;
    margin: 4px 0;
    background: rgba(0,0,0,0.03);
    border-radius: 4px;
    cursor: pointer;
    transition: background 0.2s;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
    border-left: 3px solid transparent;
}

[data-theme="dark"] .hierarchy-item {
    background: rgba(255,255,255,0.05);
}

.hierarchy-item:hover {
    background: rgba(0, 123, 255, 0.1);
    border-left-color: #007bff;
}

.hierarchy-item.active {
    background: rgba(0, 123, 255, 0.2);
    border-left-color: #007bff;
    font-weight: bold;
}

.node-type-icon {
    font-size: 12px;
    opacity: 0.7;
}

#zoom-info {
    font-size: 12px;
    font-weight: bold;
    color: var(--text-color);
    opacity: 0.8;
}

/* Mobile Responsive Styles */
@media (max-width: 768px) {
    #toolbar {
        top: 10px;
        left: 10px;
        right: 10px;
        flex-wrap: nowrap;
        overflow-x: auto;
        padding: 5px;
        gap: 5px;
        -webkit-overflow-scrolling: touch;
    }

    button {
        padding: 10px 12px;
        font-size: 13px;
        white-space: nowrap;
        flex-shrink: 0;
    }

    #sidebar {
        width: 100%; /* Full screen on mobile */
    }

    .modal-content {
        width: 95% !important;
        margin: 10px;
        padding: 15px;
    }

    #rich-editor {
        min-height: 200px;
    }
}

/* Modal Styles */
.modal {
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.7);
    display: flex;
    justify-content: center;
    align-items: center;
}

.modal-content {
    background-color: var(--modal-bg);
    color: var(--text-color);
    padding: 20px;
    border-radius: 12px;
    width: 60%;
    max-width: 800px;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
}

#rich-editor {
    border: 1px solid var(--input-border);
    border-radius: 4px;
    padding: 15px;
    min-height: 300px;
    max-height: 500px;
    overflow-y: auto;
    outline: none;
    font-size: 16px;
    line-height: 1.5;
    background: var(--modal-bg);
}

/* Context Menu Styles */
.context-menu {
    position: fixed;
    background: var(--toolbar-bg);
    border: 1px solid var(--input-border);
    border-radius: 8px;
    box-shadow: 0 4px 15px var(--card-shadow);
    z-index: 2000;
    padding: 5px 0;
    min-width: 180px;
}

.menu-item {
    padding: 8px 15px;
    cursor: pointer;
    font-size: 14px;
    color: var(--text-color);
    position: relative;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.menu-item:hover {
    background-color: rgba(0, 123, 255, 0.1);
}

.menu-separator {
    height: 1px;
    background: var(--input-border);
    margin: 5px 0;
}

.submenu-trigger::after {
    content: "▶";
    font-size: 10px;
    opacity: 0.5;
}

.submenu {
    position: absolute;
    left: 100%;
    top: 0;
    background: var(--toolbar-bg);
    border: 1px solid var(--input-border);
    border-radius: 8px;
    box-shadow: 0 4px 15px var(--card-shadow);
    display: none;
    padding: 10px;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
    min-width: 120px;
}

.submenu-trigger:hover .submenu {
    display: grid;
}

.color-option {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    border: 1px solid rgba(0,0,0,0.1);
    cursor: pointer;
    transition: transform 0.2s;
}

.color-option:hover {
    transform: scale(1.2);
}