/* General Styles */
:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --accent-color: #e74c3c;
    --success-color: #2ecc71;
    --warning-color: #f39c12;
    --danger-color: #c0392b;
    --light-color: #ecf0f1;
    --dark-color: #34495e;
    --text-color: #333;
    --border-radius: 4px;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: #f5f5f5;
}

h1, h2, h3 {
    margin-bottom: 1rem;
    color: var(--primary-color);
}

a {
    text-decoration: none;
    color: var(--secondary-color);
}

ul {
    list-style: none;
}

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
}

/* Button Styles */
.btn {
    display: inline-block;
    padding: 0.5rem 1rem;
    border: none;
    border-radius: var(--border-radius);
    background-color: var(--light-color);
    color: var(--text-color);
    cursor: pointer;
    font-size: 1rem;
    transition: background-color 0.3s;
}

.btn:hover {
    opacity: 0.9;
}

.primary {
    background-color: var(--secondary-color);
    color: white;
}

.secondary {
    background-color: var(--dark-color);
    color: white;
}

.success {
    background-color: var(--success-color);
    color: white;
}

.danger {
    background-color: var(--danger-color);
    color: white;
}

.warning {
    background-color: var(--warning-color);
    color: white;
}

/* Form Styles */
.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.form-group input, .form-group textarea, .form-group select {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid #ccc;
    border-radius: var(--border-radius);
    font-size: 1rem;
}

.form-group textarea {
    min-height: 80px;
    resize: vertical;
}

/* Error Message */
.error-message {
    color: var(--danger-color);
    margin-top: 0.5rem;
    font-size: 0.9rem;
}

/* Login Form */
.login-form {
    max-width: 400px;
    margin: 2rem auto;
    padding: 2rem;
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* Header */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
    border-bottom: 2px solid var(--light-color);
    margin-bottom: 1rem;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* App Layout */
.app-content {
    display: flex;
    gap: 1rem;
    height: calc(100vh - 100px);
}

.sidebar {
    width: 200px;
    background-color: white;
    padding: 1rem;
    border-radius: var(--border-radius);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.sidebar ul li {
    margin-bottom: 0.5rem;
}

.nav-btn {
    display: block;
    width: 100%;
    text-align: left;
    padding: 0.5rem;
    background-color: transparent;
    border: none;
    cursor: pointer;
    border-radius: var(--border-radius);
}

.nav-btn:hover {
    background-color: var(--light-color);
}

.nav-btn.active {
    background-color: var(--secondary-color);
    color: white;
}

.content {
    flex: 1;
    overflow-y: auto;
}

/* Panels */
.panel {
    background-color: white;
    padding: 1rem;
    border-radius: var(--border-radius);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.panel:not(:first-child) {
    margin-top: 1rem;
}

.panel h2 {
    margin-bottom: 1.5rem;
    border-bottom: 2px solid var(--light-color);
    padding-bottom: 0.5rem;
}

.hidden {
    display: none;
}

/* Controls */
.controls {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.items-list, .commands-list {
    display: grid;
    gap: 1rem;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
}

.item-card, .command-card {
    padding: 1rem;
    border: 1px solid var(--light-color);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: transform 0.2s;
}

.item-card:hover, .command-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.details-panel {
    margin-top: 2rem;
    padding: 1rem;
    border: 1px solid var(--light-color);
    border-radius: var(--border-radius);
}

/* Drag and Drop */
drag-drop-app {
    display: flex;
    gap: 1rem;
    height: 100%;
}

tool-box {
    min-width: 250px;
    padding: 1rem;
    background-color: var(--light-color);
    border-radius: var(--border-radius);
    overflow-y: auto;
}

.drop-zones-container {
    flex: 1;
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

drop-zone {
    min-width: 300px;
    min-height: 200px;
    padding: 1rem;
    background-color: var(--light-color);
    border-radius: var(--border-radius);
    border: 2px dashed #ccc;
}

drop-zone.highlight {
    border-color: var(--secondary-color);
    background-color: rgba(52, 152, 219, 0.1);
}

draggable-item {
    display: block;
    padding: 0.5rem;
    margin-bottom: 0.5rem;
    background-color: white;
    border-radius: var(--border-radius);
    cursor: grab;
    user-select: none;
}

/* Pie Menu Component */
.pie-menu {
    position: fixed;
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background-color: rgba(0, 0, 0, 0.2);
    transform: translate(-50%, -50%) scale(0.2);
    opacity: 0;
    transition: transform 0.3s ease, opacity 0.3s ease;
    z-index: 1000;
    pointer-events: none;
}

.pie-menu.active {
    transform: translate(-50%, -50%) scale(1);
    opacity: 1;
    pointer-events: all;
}

.pie-option {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 50px;
    height: 50px;
    margin: -25px 0 0 -25px;
    border-radius: 50%;
    background-color: #fff;
    border: none;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
    font-size: 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transform-origin: center center;
    transform: translate(0, 0);
    transition: background-color 0.2s, transform 0.2s;
}

.pie-option:hover {
    background-color: #f0f0f0;
    transform: scale(1.2) translate3d(0,0,0);
    z-index: 10;
}

.pie-option::after {
    content: attr(data-label);
    position: absolute;
    bottom: -25px;
    left: 50%;
    transform: translateX(-50%);
    background-color: #333;
    color: #fff;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    white-space: nowrap;
    opacity: 0;
    transition: opacity 0.2s;
    pointer-events: none;
}

.pie-option:hover::after {
    opacity: 1;
}