/* ==================== MAIN CONTAINER ==================== */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 2rem 4rem;
}

/* ==================== BOTÓN AGREGAR ==================== */
.add-section {
    text-align: center;
    margin-bottom: 3rem;
}

.add-button {
    background: linear-gradient(90deg, #c084fc, #ec4899);
    color: white;
    border: none;
    padding: 11px 28px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 9999px;
    cursor: pointer;
    box-shadow: 0 15px 25px -8px rgb(192 132 252);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: inline-flex;
    align-items: center;
    gap: 12px;
}

.add-button:hover {
    transform: translateY(-4px) scale(1.05);
    box-shadow: 0 25px 30px -10px rgb(236 72 153);
}

.plus {
    font-size: 1.2rem;
    line-height: 1;
}

/* ==================== GRID ==================== */
.guides-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
    gap: 2rem;
}

/* ==================== FILTROS ==================== */
.filters-section {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: center;
    margin-bottom: 2.5rem;
    padding: 0 1rem;
}

.filter-btn {
    background: white;
    color: #6b21a8;
    border: 2px solid #e0c4f7;
    padding: 8px 18px;
    border-radius: 9999px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
    font-size: 0.88rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 36px;
}

.filter-btn:hover {
    background: #f3e8ff;
    border-color: #c084fc;
    transform: translateY(-2px);
}

.filter-btn.active {
    background: linear-gradient(90deg, #c084fc, #ec4899);
    color: white;
    border: 0px solid transparent;
    box-shadow: 0 12px 25px -5px rgb(192 132 252 / 0.4);
    transform: scale(1);
}

.materia-tag {
    display: inline-block;
    background: linear-gradient(90deg, #c084fc, #ec4899);
    color: white;
    font-size: 0.85rem;
    padding: 4px 14px;
    border-radius: 9999px;
    margin-bottom: 8px;
    font-weight: 600;
    letter-spacing: 0.5px;
    width: fit-content;
}

.materia-filters {
    display: contents;
}

/* ==================== ESTADO VACÍO ==================== */
.empty-state {
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 5rem 2rem;
    color: #9f7aea;
}

.empty-icon {
    font-size: 6rem;
    margin-bottom: 1rem;
    animation: float 3s ease-in-out infinite;
}

.empty-state h2 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.empty-state p {
    font-size: 1.3rem;
    max-width: 400px;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

/* ==================== FOOTER ==================== */
.app-footer {
    width: 100%;
    background: #e551a7;
    color: white;
    text-align: center;
    padding: 1rem 0;
    font-size: 0.9rem;
    font-weight: 600;
    flex-shrink: 0;
}

.app-footer p {
    margin: 0;
}