/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #4a90e2;
    --primary-dark: #357abd;
    --secondary-color: #6c757d;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
    --background-color: #ffffff;
    --text-color: #333333;
    --border-color: #dee2e6;
    --shadow: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-lg: 0 4px 6px rgba(0,0,0,0.1);
    --border-radius: 4px;
    --transition: all 0.2s ease;
}

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

/* Container styles */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header styles */
header {
    background-color: var(--background-color);
    box-shadow: var(--shadow);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

header h1 {
    color: var(--primary-color);
    font-size: 1.8rem;
}

nav a {
    margin-left: 1.5rem;
    text-decoration: none;
    color: var(--secondary-color);
    font-weight: 500;
    transition: var(--transition);
}

nav a:hover, nav a.active {
    color: var(--primary-color);
}

/* Button styles */
.btn {
    display: inline-block;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-weight: 500;
    text-decoration: none;
    text-align: center;
    transition: var(--transition);
    border: none;
}

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

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

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

.btn-secondary:hover {
    background-color: #5a6268;
}

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

.btn-success:hover {
    background-color: #218838;
}

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

.btn-danger:hover {
    background-color: #c82333;
}

.btn-outline {
    background-color: transparent;
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
}

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

/* Form styles */
.auth-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: var(--light-color);
}

.auth-form {
    background: var(--background-color);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 400px;
}

.auth-form h2 {
    margin-bottom: 1.5rem;
    text-align: center;
    color: var(--dark-color);
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-group input, .form-group select, .form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.1);
}

/* Hero section */
.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 4rem 0;
    text-align: center;
}

.hero h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.cta-button {
    background-color: white;
    color: var(--primary-color);
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* Features section */
.features {
    padding: 4rem 0;
}

.features h2 {
    text-align: center;
    margin-bottom: 3rem;
    font-size: 2rem;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.feature {
    text-align: center;
    padding: 1.5rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.feature:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.feature h3 {
    margin-bottom: 1rem;
    color: var(--primary-color);
}

/* Dashboard styles */
.dashboard-container {
    padding: 2rem 0;
}

.dashboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.search-bar {
    margin-bottom: 2rem;
}

.search-bar input {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
}

.mindmaps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1.5rem;
}

.mindmap-card {
    background: var(--background-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 1.5rem;
    transition: var(--transition);
    cursor: pointer;
}

.mindmap-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.mindmap-card h3 {
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.mindmap-card p {
    color: var(--secondary-color);
    font-size: 0.9rem;
}

/* Editor styles */
.editor-header {
    background-color: var(--background-color);
    box-shadow: var(--shadow);
    padding: 1rem 0;
}

.editor-toolbar {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.tool-btn, .tool-select {
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background-color: var(--background-color);
    cursor: pointer;
    transition: var(--transition);
}

.tool-btn:hover, .tool-select:hover {
    background-color: var(--light-color);
}

.separator {
    width: 1px;
    height: 24px;
    background-color: var(--border-color);
    margin: 0 0.5rem;
}

.editor-info {
    margin-top: 1rem;
    display: flex;
    justify-content: space-between;
    color: var(--secondary-color);
    font-size: 0.9rem;
}

.editor-container {
    display: flex;
    height: calc(100vh - 120px);
}

#mindmapCanvas {
    flex: 1;
    background-color: var(--light-color);
}

.properties-panel {
    width: 250px;
    padding: 1rem;
    background-color: var(--background-color);
    border-left: 1px solid var(--border-color);
    overflow-y: auto;
}

.properties-panel h3 {
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.property-group {
    margin-bottom: 1rem;
}

.property-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

/* Footer styles */
footer {
    background-color: var(--dark-color);
    color: white;
    padding: 2rem 0;
    text-align: center;
    margin-top: 4rem;
}

/* Responsive design */
@media (max-width: 768px) {
    .dashboard-header {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }

    .editor-container {
        flex-direction: column;
    }

    .properties-panel {
        width: 100%;
        border-left: none;
        border-top: 1px solid var(--border-color);
        height: 200px;
    }

    .feature-grid {
        grid-template-columns: 1fr;
    }

    .mindmaps-grid {
        grid-template-columns: 1fr;
    }

    header .container {
        flex-direction: column;
        gap: 1rem;
    }

    nav {
        display: flex;
        gap: 1rem;
    }

    nav a {
        margin-left: 0;
    }
}

/* Utility classes */
.text-center {
    text-align: center;
}

.text-primary {
    color: var(--primary-color);
}

.text-secondary {
    color: var(--secondary-color);
}

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.hidden {
    display: none;
}

/* Animation classes */
.fade-in {
    animation: fadeIn 0.3s ease-in;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.slide-in {
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from { transform: translateY(20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}