:root {
    --primary-color: #3498db;
    --secondary-color: #2c3e50;
    --success-color: #27ae60;
    --danger-color: #e74c3c;
    --warning-color: #f39c12;
    --info-color: #16a085;
    --light-bg: #ecf0f1;
    --dark-text: #2c3e50;
    --border-color: #bdc3c7;
    --sidebar-bg: #34495e;
    --sidebar-text: #ecf0f1;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: var(--dark-text);
}

.embed-mode .recuedu-topbar {
    display: none;
}

.container-fluid {
    height: 100vh;
    overflow: hidden;
}

.row {
    height: 100%;
    margin: 0;
}

/* Sidebar */
.sidebar {
    background-color: var(--sidebar-bg);
    color: var(--sidebar-text);
    height: 100vh;
    overflow-y: auto;
    padding: 0;
    box-shadow: 2px 0 10px rgba(0,0,0,0.1);
}

.sidebar-content {
    padding: 2rem 1.5rem;
}

.sidebar::-webkit-scrollbar {
    width: 8px;
}

.sidebar::-webkit-scrollbar-track {
    background: rgba(0,0,0,0.1);
}

.sidebar::-webkit-scrollbar-thumb {
    background: rgba(255,255,255,0.3);
    border-radius: 4px;
}

.sidebar::-webkit-scrollbar-thumb:hover {
    background: rgba(255,255,255,0.5);
}

.app-title {
    font-size: 1.8rem;
    margin-bottom: 2rem;
    text-align: center;
    color: var(--sidebar-text);
    font-weight: 700;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.app-title i {
    color: #3498db;
}

/* Language selector */
.language-selector {
    text-align: center;
}

.language-selector .form-select {
    background: rgba(255,255,255,0.15);
    border: 1px solid rgba(255,255,255,0.3);
    color: var(--sidebar-text);
    font-weight: 600;
    text-align: center;
}

.language-selector .form-select:focus {
    background: rgba(255,255,255,0.25);
    border-color: #3498db;
    color: var(--sidebar-text);
}

.language-selector option {
    background: var(--sidebar-bg);
    color: var(--sidebar-text);
}

.section {
    background: rgba(255,255,255,0.1);
    padding: 1.5rem;
    border-radius: 10px;
    margin-bottom: 1.5rem;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.1);
}

.section h3 {
    font-size: 1rem;
    margin-bottom: 1rem;
    color: var(--sidebar-text);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.section h3 i {
    color: #3498db;
}

/* Form controls */
.form-control,
.form-select {
    background: rgba(255,255,255,0.9);
    border: 1px solid rgba(255,255,255,0.3);
    color: var(--dark-text);
    border-radius: 5px;
}

.form-control:focus,
.form-select:focus {
    background: white;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(52, 152, 219, 0.25);
}

.form-control::placeholder {
    color: #95a5a6;
}

.text-muted {
    color: #bdc3c7 !important;
}

.form-check-label {
    color: var(--sidebar-text);
    font-size: 0.9rem;
}

/* Botones de grupos de palabras */
.btn-outline-light {
    border-color: rgba(255,255,255,0.3);
    color: var(--sidebar-text);
    font-size: 0.75rem;
    padding: 0.3rem 0.6rem;
}

.btn-outline-light:hover {
    background-color: rgba(255,255,255,0.2);
    border-color: rgba(255,255,255,0.5);
    color: white;
}

.btn-outline-danger {
    font-size: 0.75rem;
    padding: 0.3rem 0.6rem;
}

.gap-2 {
    gap: 0.5rem;
}

/* Buttons */
.btn {
    border-radius: 5px;
    font-weight: 600;
    padding: 0.6rem 1rem;
    transition: all 0.3s ease;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.btn-success {
    background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
}

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(56, 239, 125, 0.4);
}

.btn-info {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

.btn-info:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(79, 172, 254, 0.4);
}

.btn-secondary {
    background: linear-gradient(135deg, #868f96 0%, #596164 100%);
}

.btn-secondary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(134, 143, 150, 0.4);
}

.btn i {
    margin-right: 0.5rem;
}

/* Main content */
.main-content {
    background: white;
    height: 100vh;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.canvas-container {
    width: 100%;
    height: 100%;
    background: white;
    border-radius: 15px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.1);
    position: relative;
    overflow: hidden;
}

#cloudCanvas {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

#cloudCanvas svg {
    max-width: 100%;
    max-height: 100%;
}

/* Empty state */
.empty-state {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: #95a5a6;
}

.empty-state i {
    color: #bdc3c7;
    opacity: 0.5;
}

.empty-state h2 {
    color: #7f8c8d;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.empty-state p {
    color: #95a5a6;
    font-size: 1.1rem;
}

/* Statistics */
.stats-container {
    background: rgba(255,255,255,0.05);
    padding: 1rem;
    border-radius: 5px;
    max-height: 300px;
    overflow-y: auto;
}

.stat-item {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem 0;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    color: var(--sidebar-text);
    font-size: 0.9rem;
}

.stat-item:last-child {
    border-bottom: none;
}

.stat-word {
    font-weight: 600;
}

.stat-count {
    background: rgba(52, 152, 219, 0.3);
    padding: 0.2rem 0.6rem;
    border-radius: 12px;
    font-weight: 600;
}

/* Range slider */
.form-range {
    accent-color: #3498db;
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        height: auto;
        max-height: 50vh;
    }
    
    .main-content {
        height: 50vh;
    }
    
    .app-title {
        font-size: 1.4rem;
    }
    
    .section {
        padding: 1rem;
        margin-bottom: 1rem;
    }
}

/* Loading animation */
.loading {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 2rem;
    color: var(--primary-color);
}

@keyframes spin {
    0% { transform: translate(-50%, -50%) rotate(0deg); }
    100% { transform: translate(-50%, -50%) rotate(360deg); }
}

.loading.spin {
    animation: spin 2s linear infinite;
}

/* Word cloud styles */
.word-cloud-text {
    cursor: pointer;
    transition: all 0.2s ease;
}

.word-cloud-text:hover {
    filter: brightness(1.3);
    transform: scale(1.1);
}

/* Custom scrollbar for stats */
.stats-container::-webkit-scrollbar {
    width: 6px;
}

.stats-container::-webkit-scrollbar-track {
    background: rgba(0,0,0,0.1);
}

.stats-container::-webkit-scrollbar-thumb {
    background: rgba(255,255,255,0.3);
    border-radius: 3px;
}

.stats-container::-webkit-scrollbar-thumb:hover {
    background: rgba(255,255,255,0.5);
}