:root {
    /* Variables para light mode */
    --bg-primary: white;
    --bg-secondary: #f8f9fa;
    --text-primary: #333;
    --text-secondary: #666;
    --text-muted: #999;
    --border-color: #ddd;
    --border-light: #f0f0f0;
    --card-bg: white;
    --card-shadow: rgba(0,0,0,0.08);
    --card-shadow-hover: rgba(0, 140, 69, 0.15);
    --input-bg: white;
    --select-bg: white;
}

[data-theme="dark"] {
    /* Variables para dark mode */
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --text-primary: #e0e0e0;
    --text-secondary: #b0b0b0;
    --text-muted: #808080;
    --border-color: #404040;
    --border-light: #353535;
    --card-bg: #2d2d2d;
    --card-shadow: rgba(0,0,0,0.3);
    --card-shadow-hover: rgba(0, 140, 69, 0.25);
    --input-bg: #353535;
    --select-bg: #353535;
}

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

body {
    font-family: 'Zain', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #ff6b6b 0%, #ffa726 25%, #42a5f5 50%, #ab47bc 75%, #66bb6a 100%);
    background-size: 400% 400%;
    animation: gradientShift 8s ease-in-out infinite;
    min-height: 100vh;
    padding: 20px;
    transition: all 0.3s ease;
}

[data-theme="dark"] body {
    background: linear-gradient(135deg, #2c1810 0%, #1a1a2e 25%, #16213e 50%, #0f3460 75%, #533483 100%);
    background-size: 400% 400%;
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: var(--bg-primary);
    border-radius: 15px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    overflow: hidden;
    transition: all 0.3s ease;
}

[data-theme="dark"] .container {
    box-shadow: 0 20px 40px rgba(0,0,0,0.4);
}

.header {
    background: linear-gradient(135deg, #ff9a56 0%, #ff6b9d 25%, #c44569 50%, #f8b500 75%, #ff6348 100%);
    background-size: 400% 400%;
    animation: headerGradient 6s ease-in-out infinite;
    color: white;
    padding: 60px 30px 40px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

[data-theme="dark"] .header {
    background: linear-gradient(135deg, #4a2c2a 0%, #3d2a3d 25%, #2d1b2d 50%, #4a3728 75%, #3d2a28 100%);
    background-size: 400% 400%;
}

@keyframes headerGradient {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="2" fill="rgba(255,255,255,0.1)"/></svg>') repeat;
    background-size: 50px 50px;
}

.header > * {
    position: relative;
    z-index: 1;
}

.main-title {
    font-family: 'Knewave', cursive;
    font-size: 2.4rem;
    margin: 0 0 20px 0;
    font-weight: 400;
    cursor: pointer;
    perspective: 1000px;
    display: inline-block;
    line-height: 1.2;
}

.title-word {
    display: inline-block;
    position: relative;
}

.title-letter {
    display: inline-block;
    margin: 0 0.05em;
    position: relative;
    transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    transform-origin: center bottom;
    cursor: pointer;
}

.title-letter:nth-child(odd) {
    color: #ffd700;
    text-shadow: 
        2px 2px 0px #cc7a00,
        4px 4px 8px rgba(0,0,0,0.3);
}

.title-letter:nth-child(even) {
    color: #ff4757;
    text-shadow: 
        2px 2px 0px #c8102e,
        4px 4px 8px rgba(0,0,0,0.3);
}

[data-theme="dark"] .title-letter:nth-child(odd) {
    color: #ffeb3b;
    text-shadow: 
        2px 2px 0px #f57f17,
        4px 4px 8px rgba(0,0,0,0.5);
}

[data-theme="dark"] .title-letter:nth-child(even) {
    color: #ff6b6b;
    text-shadow: 
        2px 2px 0px #e53935,
        4px 4px 8px rgba(0,0,0,0.5);
}

.title-letter:hover {
    transform: scale(1.3) rotate(10deg);
    animation: letterShake 0.5s ease-in-out;
    z-index: 10;
}

.title-letter.space {
    margin: 0 0.3em;
}

@keyframes letterShake {
    0%, 100% { transform: scale(1.3) rotate(10deg); }
    25% { transform: scale(1.4) rotate(-8deg); }
    50% { transform: scale(1.5) rotate(12deg); }
    75% { transform: scale(1.3) rotate(-6deg); }
}

.subtitle {
    font-family: 'Darumadrop One', cursive;
    font-size: 1.1rem;
    opacity: 0.9;
    font-weight: 400;
    letter-spacing: 0.5px;
    margin: 0;
}

.controls {
    padding: 30px;
    border-bottom: 1px solid var(--border-light);
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    border-left: 4px solid #008c45;
    transition: all 0.3s ease;
}

.search-bar {
    width: 100%;
    padding: 12px 20px;
    font-size: 1rem;
    border: 2px solid var(--border-color);
    border-radius: 25px;
    outline: none;
    margin-bottom: 20px;
    transition: all 0.3s ease;
    background: var(--input-bg);
    color: var(--text-primary);
}

.search-bar:focus {
    border-color: #008c45;
    box-shadow: 0 0 0 3px rgba(0, 140, 69, 0.1);
}

.search-bar::placeholder {
    color: var(--text-muted);
}

.filters {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
    align-items: center;
    margin-bottom: 20px;
}

.filter-group {
    display: flex;
    align-items: center;
    gap: 8px;
}

.filter-group label {
    font-weight: 600;
    color: var(--text-secondary);
}

select {
    padding: 8px 12px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    background: var(--select-bg);
    font-size: 0.9rem;
    transition: all 0.3s ease;
    color: var(--text-primary);
}

select:focus {
    border-color: #008c45;
    outline: none;
    box-shadow: 0 0 0 3px rgba(0, 140, 69, 0.1);
}

select option {
    background: var(--select-bg);
    color: var(--text-primary);
}

.controls-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.right-controls {
    display: flex;
    align-items: center;
    gap: 20px;
}

.sort-options {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.view-options {
    display: flex;
    align-items: center;
    gap: 10px;
}

.view-options label {
    font-weight: 600;
    color: var(--text-secondary);
}

.view-btn {
    padding: 8px;
    background: var(--bg-secondary);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
}

.view-btn.active {
    background: linear-gradient(135deg, #008c45 0%, #006837 100%);
    color: white;
}

.view-btn:hover {
    background: linear-gradient(135deg, #c8102e 0%, #b80e26 100%);
    color: white;
}

/* Theme Toggle Button */
.theme-toggle {
    display: flex;
    align-items: center;
}

.theme-btn {
    padding: 8px 12px;
    background: linear-gradient(135deg, #4a90e2 0%, #357abd 100%);
    border: none;
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(74, 144, 226, 0.3);
}

.theme-btn:hover {
    background: linear-gradient(135deg, #5ba0f2 0%, #4680c2 100%);
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(74, 144, 226, 0.4);
}

.sun-icon, .moon-icon {
    transition: all 0.3s ease;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

[data-theme="dark"] .sun-icon {
    opacity: 0;
    transform: translate(-50%, -50%) rotate(180deg);
}

[data-theme="dark"] .moon-icon {
    opacity: 1;
    transform: translate(-50%, -50%) rotate(0deg);
}

body:not([data-theme="dark"]) .sun-icon {
    opacity: 1;
    transform: translate(-50%, -50%) rotate(0deg);
}

body:not([data-theme="dark"]) .moon-icon {
    opacity: 0;
    transform: translate(-50%, -50%) rotate(-180deg);
}

.language-toggle {
    display: flex;
    align-items: center;
}

.lang-btn {
    padding: 8px 12px;
    background: linear-gradient(135deg, #c8102e 0%, #b80e26 100%);
    color: white;
    border: none;
    border-radius: 20px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.9rem;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    gap: 5px;
    box-shadow: 0 2px 8px rgba(200, 16, 46, 0.3);
}

.lang-btn:hover {
    background: linear-gradient(135deg, #008c45 0%, #006837 100%);
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(0, 140, 69, 0.4);
}

.sort-btn {
    padding: 8px 16px;
    background: var(--bg-secondary);
    border: none;
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s;
    font-size: 0.9rem;
    color: var(--text-primary);
}

.sort-btn.active {
    background: linear-gradient(135deg, #008c45 0%, #006837 100%);
    color: white;
}

.sort-btn:hover {
    background: linear-gradient(135deg, #c8102e 0%, #b80e26 100%);
    color: white;
}

.tools-grid {
    padding: 30px;
    display: grid;
    gap: 25px;
    transition: all 0.3s ease;
    background: var(--bg-primary);
}

.tools-grid.card-view {
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
}

.tools-grid.grid-view {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

.tool-card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 25px;
    box-shadow: 0 5px 15px var(--card-shadow);
    border: 1px solid var(--border-light);
    border-left: 4px solid #008c45;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
}

.tool-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px var(--card-shadow-hover);
    border-left-color: #c8102e;
}

.tool-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 15px;
}

.tool-title {
    font-size: 1.4rem;
    color: #c8102e;
    margin: 0 0 5px 0;
    font-weight: 600;
}

[data-theme="dark"] .tool-title {
    color: #ff6b6b;
}

.tool-meta {
    font-size: 0.85rem;
    color: var(--text-secondary);
    display: flex;
    flex-direction: column;
    gap: 3px;
}

.tool-description {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 15px;
    font-size: 0.95rem;
}

.tool-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 15px;
}

.tag {
    background: rgba(0, 140, 69, 0.1);
    color: #006837;
    padding: 4px 8px;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 500;
    border: 1px solid rgba(0, 140, 69, 0.2);
}

.tag.subject {
    background: rgba(200, 16, 46, 0.1);
    color: #c8102e;
    border: 1px solid rgba(200, 16, 46, 0.2);
}

.tag.level {
    background: rgba(255, 193, 7, 0.1);
    color: #cc7a00;
    border: 1px solid rgba(255, 193, 7, 0.3);
}

[data-theme="dark"] .tag {
    background: rgba(0, 140, 69, 0.2);
    color: #4caf50;
    border: 1px solid rgba(0, 140, 69, 0.3);
}

[data-theme="dark"] .tag.subject {
    background: rgba(200, 16, 46, 0.2);
    color: #ff6b6b;
    border: 1px solid rgba(200, 16, 46, 0.3);
}

[data-theme="dark"] .tag.level {
    background: rgba(255, 193, 7, 0.2);
    color: #ffeb3b;
    border: 1px solid rgba(255, 193, 7, 0.3);
}

.tool-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.visit-btn {
    background: linear-gradient(135deg, #008c45 0%, #006837 100%);
    color: white;
    padding: 10px 20px;
    text-decoration: none;
    border-radius: 25px;
    font-weight: 600;
    transition: all 0.3s;
    font-size: 0.9rem;
    box-shadow: 0 2px 8px rgba(0, 140, 69, 0.3);
}

.visit-btn:hover {
    background: linear-gradient(135deg, #c8102e 0%, #b80e26 100%);
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(200, 16, 46, 0.4);
}

.rating {
    display: flex;
    align-items: center;
    gap: 5px;
}

.stars {
    color: #ffc107;
    font-size: 1.1rem;
}

.usage-count {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-style: italic;
}

.no-results {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.stats {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    padding: 20px 30px;
    border-top: 1px solid var(--border-light);
    border-left: 4px solid #c8102e;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.footer {
    background: linear-gradient(135deg, #2c3e50 0%, #34495e 50%, #2c3e50 100%);
    padding: 20px 30px;
    text-align: center;
    border-top: 3px solid #ff6348;
}

[data-theme="dark"] .footer {
    background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 50%, #1a1a1a 100%);
    border-top: 3px solid #ff6b6b;
}

.footer-logo {
    height: 60px;
    width: auto;
    transition: transform 0.3s ease;
    filter: brightness(1.1);
}

[data-theme="dark"] .footer-logo {
    filter: brightness(1.3) contrast(1.1);
}

.footer-logo:hover {
    transform: scale(1.1);
}

@media (max-width: 768px) {
    .tools-grid.card-view {
        grid-template-columns: 1fr;
    }
    
    .tools-grid.grid-view {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    }
    
    .controls-row {
        flex-direction: column;
        align-items: stretch;
        gap: 15px;
    }
    
    .right-controls {
        justify-content: space-between;
    }
    
    .filters {
        flex-direction: column;
        align-items: stretch;
    }
    
    .filter-group {
        justify-content: space-between;
    }
    
    .main-title {
        font-size: 1.8rem !important;
    }

    .sort-options {
        justify-content: center;
        order: 2;
    }

    .right-controls {
        order: 1;
    }
}
@media (max-width: 768px) {
    .tools-grid.card-view {
        grid-template-columns: 1fr;
    }
    
    .tools-grid.grid-view {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    }
    
    .controls-row {
        flex-direction: column;
        align-items: stretch;
        gap: 15px;
    }
    
    .right-controls {
        justify-content: space-between;
    }
    
    .filters {
        flex-direction: column;
        align-items: stretch;
    }
    
    .filter-group {
        justify-content: space-between;
    }
    
    .main-title {
        font-size: 1.8rem !important;
        line-height: 1.1 !important;
    }

    /* Arreglo específico para el título en español */
    .title-word[data-es="HERRAMIENTAS PARA APRENDER ESPAÑOL"] {
        word-spacing: 0.5em;
    }

    /* Usar CSS para romper el título en puntos específicos */
    .title-letter.space:nth-of-type(12), /* Después de "PARA" */
    .title-letter.space:nth-of-type(21) { /* Después de "APRENDER" */
        display: block;
        height: 0.2em;
    }

    .sort-options {
        justify-content: center;
        order: 2;
    }

    .right-controls {
        order: 1;
    }
}

/* Alternativa más elegante - usando CSS hyphens */
@media (max-width: 480px) {
    .main-title {
        font-size: 1.5rem !important;
        hyphens: auto;
        word-break: break-word;
    }
    
    .title-word {
        hyphens: auto;
        overflow-wrap: break-word;
    }
}
/* Botón del departamento */
.department-link {
    margin-top: 20px;
}

.dept-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 255, 255, 0.2);
    color: white;
    padding: 12px 24px;
    border-radius: 25px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.dept-btn:hover {
    background: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.4);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}